INFO: task hung in copy_process
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syzbot
Sep 8, 2018, 9:52:03 AM9/8/18
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: f2b6e66e9885 Add linux-next specific files for 20180904
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13de9e49400000
kernel config: https://syzkaller.appspot.com/x/.config?x=15ad48400e39c1b3
dashboard link: https://syzkaller.appspot.com/bug?extid=0d867757fdc016c0157e
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
CC: [linux-...@vger.kernel.org pml...@suse.com
ros...@goodmis.org sergey.se...@gmail.com]
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0d8677...@syzkaller.appspotmail.com
[ 21298] 0 21298 17617 8745 114688 0 0
syz-executor2
[ 21299] 0 21299 17617 8745 118784 0 0
syz-executor2
[ 21300] 0 21300 17617 8745 118784 0 0
syz-executor2
[ 21301] 0 21301 17617 8745 118784 0 0
syz-executor2
[ 21302] 0 21302 17617 8745 114688 0 0
syz-executor2
INFO: task syz-executor2:10921 blocked for more than 140 seconds.
[ 21303] 0 21303 17617 8745 118784 0 0
syz-executor2
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 21304] 0 21304 17617 8745 118784 0 0
syz-executor2
syz-executor2 D22568 10921 10772 0x00000000
[ 21305] 0 21305 17617 8745 118784 0 0
syz-executor2
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
[ 21306] 0 21306 17617 8745 118784 0 0
syz-executor2
[ 21307] 0 21307 17617 8745 118784 0 0
syz-executor2
[ 21308] 0 21308 17617 8745 118784 0 0
syz-executor2
[ 21309] 0 21309 17617 8745 118784 0 0
syz-executor2
[ 21310] 0 21310 17617 8745 118784 0 0
syz-executor2
[ 21311] 0 21311 17617 8745 118784 0 0
syz-executor2
schedule+0xfb/0x450 kernel/sched/core.c:3517
[ 21312] 0 21312 17617 8745 118784 0 0
syz-executor2
[ 21313] 0 21313 17617 8745 118784 0 0
syz-executor2
[ 21314] 0 21314 17617 8745 118784 0 0
syz-executor2
[ 21315] 0 21315 17617 8745 118784 0 0
syz-executor2
[ 21316] 0 21316 17617 8745 118784 0 0
syz-executor2
__rwsem_down_write_failed_common+0x98b/0x1650
kernel/locking/rwsem-xadd.c:566
[ 21317] 0 21317 17617 8745 118784 0 0
syz-executor2
[ 21318] 0 21318 17617 8745 118784 0 0
syz-executor2
[ 21319] 0 21319 17617 8745 118784 0 0
syz-executor2
[ 21320] 0 21320 17617 8745 118784 0 0
syz-executor2
[ 21321] 0 21321 17617 8745 118784 0 0
syz-executor2
[ 21322] 0 21322 17617 8745 118784 0 0
syz-executor2
[ 21323] 0 21323 17617 8745 118784 0 0
syz-executor2
[ 21324] 0 21324 17617 8745 118784 0 0
syz-executor2
[ 21325] 0 21325 17617 8745 118784 0 0
syz-executor2
[ 21326] 0 21326 17617 8745 114688 0 0
syz-executor2
[ 21327] 0 21327 17617 8745 118784 0 0
syz-executor2
[ 21328] 0 21328 17617 8745 118784 0 0
syz-executor2
[ 21329] 0 21329 17617 8745 118784 0 0
syz-executor2
[ 21330] 0 21330 17617 8745 118784 0 0
syz-executor2
[ 21331] 0 21331 17617 8745 118784 0 0
syz-executor2
[ 21332] 0 21332 17617 8745 118784 0 0
syz-executor2
[ 21333] 0 21333 17617 8745 118784 0 0
syz-executor2
[ 21334] 0 21334 17617 8745 118784 0 0
syz-executor2
[ 21335] 0 21335 17617 8745 118784 0 0
syz-executor2
[ 21336] 0 21336 17617 8745 118784 0 0
syz-executor2
rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
[ 21337] 0 21337 17617 8745 118784 0 0
syz-executor2
call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
[ 21338] 0 21338 17617 8745 118784 0 0
syz-executor2
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0xaa/0x130 kernel/locking/rwsem.c:72
[ 21339] 0 21339 17617 8745 118784 0 0
syz-executor2
[ 21340] 0 21340 17617 8745 118784 0 0
syz-executor2
[ 21341] 0 21341 17617 8745 118784 0 0
syz-executor2
i_mmap_lock_write include/linux/fs.h:490 [inline]
dup_mmap kernel/fork.c:512 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x3ca3/0x7af0 kernel/fork.c:1870
[ 21342] 0 21342 17617 8745 118784 0 0
syz-executor2
[ 21343] 0 21343 17617 8745 118784 0 0
syz-executor2
[ 21344] 0 21344 17617 8745 118784 0 0
syz-executor2
[ 21345] 0 21345 17617 8745 118784 0 0
syz-executor2
[ 21346] 0 21346 17617 8745 118784 0 0
syz-executor2
[ 21347] 0 21347 17617 8745 118784 0 0
syz-executor2
[ 21348] 0 21348 17617 8745 118784 0 0
syz-executor2
[ 21349] 0 21349 17617 8745 118784 0 0
syz-executor2
[ 19354] 0 19354 17617 8745 118784 0 0
syz-executor2
[ 21350] 0 21350 17617 8745 118784 0 0
syz-executor2
[ 21351] 0 21351 17617 8745 118784 0 0
syz-executor2
[ 21352] 0 21352 17617 8745 114688 0 0
syz-executor2
[ 21353] 0 21353 17617 8745 118784 0 0
syz-executor2
[ 21354] 0 21354 17617 8745 118784 0 0
syz-executor2
[ 21355] 0 21355 17617 8745 118784 0 0
syz-executor2
[ 21356] 0 21356 17617 8745 118784 0 0
syz-executor2
[ 21357] 0 21357 17617 8745 118784 0 0
syz-executor2
[ 21358] 0 21358 17617 8745 118784 0 0
syz-executor2
[ 21359] 0 21359 17617 8745 118784 0 0
syz-executor2
[ 21360] 0 21360 17617 8745 118784 0 0
syz-executor2
[ 21361] 0 21361 17617 8745 118784 0 0
syz-executor2
[ 21362] 0 21362 17617 8745 118784 0 0
syz-executor2
[ 21363] 0 21363 17617 8745 118784 0 0
syz-executor2
[ 21364] 0 21364 17617 8745 118784 0 0
syz-executor2
[ 21365] 0 21365 17617 8745 118784 0 0
syz-executor2
[ 21366] 0 21366 17617 8745 118784 0 0
syz-executor2
[ 21367] 0 21367 17617 8745 118784 0 0
syz-executor2
[ 21368] 0 21368 17617 8745 118784 0 0
syz-executor2
[ 21369] 0 21369 17617 8745 118784 0 0
syz-executor2
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
[ 21370] 0 21370 17617 8745 118784 0 0
syz-executor2
[ 21371] 0 21371 17617 8745 118784 0 0
syz-executor2
[ 21372] 0 21372 17617 8745 118784 0 0
syz-executor2
[ 21373] 0 21373 17617 8745 118784 0 0
syz-executor2
[ 21374] 0 21374 17617 8745 118784 0 0
syz-executor2
[ 21376] 0 21376 17617 8745 118784 0 0
syz-executor2
[ 21377] 0 21377 17617 8745 118784 0 0
syz-executor2
[ 21378] 0 21378 17617 8745 118784 0 0
syz-executor2
[ 21379] 0 21379 17617 8745 114688 0 0
syz-executor2
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
[ 21380] 0 21380 17617 8745 118784 0 0
syz-executor2
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
[ 21381] 0 21381 17617 8745 118784 0 0
syz-executor2
[ 21382] 0 21382 17617 8745 118784 0 0
syz-executor2
[ 21383] 0 21383 17617 8745 118784 0 0
syz-executor2
[ 21384] 0 21384 17617 8745 118784 0 0
syz-executor2
[ 21385] 0 21385 17617 8745 118784 0 0
syz-executor2
entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 21386] 0 21386 17617 8745 118784 0 0
syz-executor2
RIP: 0033:0x457099
Code: 48 8b 54 24 38 48 8b 7c 24 48 eb 8d 48 8b 6c 24 50 48 83 c4 58 c3 48
89 04 24 48 89 5c 24 08 e8 fd a8 fb ff 48 8b 44 24 40 48 <8b> 4c 24 48 48
8b 54 24 38 4c 8b 54 24 18 e9 ee fe ff ff 48 89 74
[ 21387] 0 21387 17617 8745 118784 0 0
syz-executor2
RSP: 002b:00007f98a3edbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
[ 21388] 0 21388 17617 8745 118784 0 0
syz-executor2
RAX: ffffffffffffffda RBX: 00007f98a3edc6d4 RCX: 0000000000457099
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0002000000000000
[ 21389] 0 21389 17617 8745 118784 0 0
syz-executor2
RBP: 00000000009300a0 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff
[ 21390] 0 21390 17617 8745 118784 0 0
syz-executor2
R13: 00000000004cbae8 R14: 00000000004c33c7 R15: 0000000000000000
INFO: task syz-executor2:11028 blocked for more than 140 seconds.
[ 21391] 0 21391 17617 8745 118784 0 0
syz-executor2
Not tainted 4.19.0-rc2-next-20180904+ #55
[ 21392] 0 21392 17617 8745 114688 0 0
syz-executor2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2 D
[ 21393] 0 21393 17617 8745 118784 0 0
syz-executor2
22504 11028 10805 0x00000000
[ 21394] 0 21394 17617 8745 118784 0 0
syz-executor2
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
[ 21395] 0 21395 17617 8745 118784 0 0
syz-executor2
[ 21396] 0 21396 17617 8745 118784 0 0
syz-executor2
[ 21397] 0 21397 17617 8745 118784 0 0
syz-executor2
[ 21398] 0 21398 17617 8745 118784 0 0
syz-executor2
[ 21399] 0 21399 17617 8745 118784 0 0
syz-executor2
schedule+0xfb/0x450 kernel/sched/core.c:3517
[ 21400] 0 21400 17617 8745 118784 0 0
syz-executor2
[ 21401] 0 21401 17617 8745 118784 0 0
syz-executor2
[ 21402] 0 21402 17617 8745 118784 0 0
syz-executor2
[ 21403] 0 21403 17617 8745 118784 0 0
syz-executor2
[ 21404] 0 21404 17617 8745 118784 0 0
syz-executor2
__rwsem_down_write_failed_common+0x98b/0x1650
kernel/locking/rwsem-xadd.c:566
[ 21405] 0 21405 17617 8745 114688 0 0
syz-executor2
[ 21406] 0 21406 17617 8745 118784 0 0
syz-executor2
[ 21407] 0 21407 17617 8745 118784 0 0
syz-executor2
[ 21408] 0 21408 17617 8745 118784 0 0
syz-executor2
[ 21409] 0 21409 17617 8745 118784 0 0
syz-executor2
[ 21410] 0 21410 17617 8745 118784 0 0
syz-executor2
[ 21411] 0 21411 17617 8745 118784 0 0
syz-executor2
[ 21412] 0 21412 17617 8745 118784 0 0
syz-executor2
[ 21413] 0 21413 17617 8745 118784 0 0
syz-executor2
[ 21414] 0 21414 17617 8745 118784 0 0
syz-executor2
[ 21415] 0 21415 17617 8745 118784 0 0
syz-executor2
[ 21416] 0 21416 17617 8745 118784 0 0
syz-executor2
[ 21417] 0 21417 17617 8745 118784 0 0
syz-executor2
[ 21419] 0 21419 17617 8745 118784 0 0
syz-executor2
[ 21420] 0 21420 17617 8745 114688 0 0
syz-executor2
[ 21421] 0 21421 17617 8745 118784 0 0
syz-executor2
[ 21422] 0 21422 17617 8745 114688 0 0
syz-executor2
[ 21423] 0 21423 17617 8745 118784 0 0
syz-executor2
rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
[ 21424] 0 21424 17617 8745 118784 0 0
syz-executor2
[ 21425] 0 21425 17617 8745 118784 0 0
syz-executor2
call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0xaa/0x130 kernel/locking/rwsem.c:72
[ 21426] 0 21426 17617 8745 118784 0 0
syz-executor2
[ 21427] 0 21427 17617 8745 118784 0 0
syz-executor2
i_mmap_lock_write include/linux/fs.h:490 [inline]
dup_mmap kernel/fork.c:512 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x3ca3/0x7af0 kernel/fork.c:1870
[ 21428] 0 21428 17617 8745 118784 0 0
syz-executor2
[ 21429] 0 21429 17617 8745 118784 0 0
syz-executor2
[ 21430] 0 21430 17617 8745 118784 0 0
syz-executor2
[ 21431] 0 21431 17617 8745 114688 0 0
syz-executor2
[ 21432] 0 21432 17617 8745 118784 0 0
syz-executor2
[ 21433] 0 21433 17617 8745 118784 0 0
syz-executor2
[ 21434] 0 21434 17617 8745 118784 0 0
syz-executor2
[ 21435] 0 21435 17617 8745 118784 0 0
syz-executor2
[ 21437] 0 21437 17617 8745 118784 0 0
syz-executor2
[ 21438] 0 21438 17617 8745 118784 0 0
syz-executor2
[ 21439] 0 21439 17617 8745 118784 0 0
syz-executor2
[ 21440] 0 21440 17617 8745 118784 0 0
syz-executor2
[ 21441] 0 21441 17617 8745 118784 0 0
syz-executor2
[ 21442] 0 21442 17617 8745 118784 0 0
syz-executor2
[ 21443] 0 21443 17617 8745 114688 0 0
syz-executor2
[ 21444] 0 21444 17617 8745 118784 0 0
syz-executor2
[ 21445] 0 21445 17617 8745 118784 0 0
syz-executor2
[ 21446] 0 21446 17617 8745 118784 0 0
syz-executor2
[ 21447] 0 21447 17617 8745 114688 0 0
syz-executor2
[ 21448] 0 21448 17617 8745 118784 0 0
syz-executor2
[ 21449] 0 21449 17617 8745 118784 0 0
syz-executor2
[ 21450] 0 21450 17617 8745 118784 0 0
syz-executor2
[ 21451] 0 21451 17617 8745 118784 0 0
syz-executor2
[ 21452] 0 21452 17617 8745 118784 0 0
syz-executor2
[ 21453] 0 21453 17617 8745 118784 0 0
syz-executor2
[ 21454] 0 21454 17617 8745 118784 0 0
syz-executor2
[ 21455] 0 21455 17617 8745 118784 0 0
syz-executor2
[ 21456] 0 21456 17617 8745 118784 0 0
syz-executor2
[ 21457] 0 21457 17617 8745 114688 0 0
syz-executor2
[ 21458] 0 21458 17617 8745 118784 0 0
syz-executor2
[ 21459] 0 21459 17617 8745 114688 0 0
syz-executor2
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
[ 21460] 0 21460 17617 8745 118784 0 0
syz-executor2
[ 21461] 0 21461 17617 8745 118784 0 0
syz-executor2
[ 21462] 0 21462 17617 8745 118784 0 0
syz-executor2
[ 21463] 0 21463 17617 8745 118784 0 0
syz-executor2
[ 21464] 0 21464 17617 8745 118784 0 0
syz-executor2
[ 21465] 0 21465 17617 8745 118784 0 0
syz-executor2
[ 21466] 0 21466 17617 8745 118784 0 0
syz-executor2
[ 19538] 0 19538 17617 8745 118784 0 0
syz-executor2
[ 21467] 0 21467 17617 8745 118784 0 0
syz-executor2
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
[ 21468] 0 21468 17617 8745 114688 0 0
syz-executor2
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
[ 21469] 0 21469 17617 8745 118784 0 0
syz-executor2
[ 21470] 0 21470 17617 8745 118784 0 0
syz-executor2
[ 21471] 0 21471 17617 8745 118784 0 0
syz-executor2
[ 21472] 0 21472 17617 8745 118784 0 0
syz-executor2
[ 21473] 0 21473 17617 8745 118784 0 0
syz-executor2
entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 21474] 0 21474 17617 8745 118784 0 0
syz-executor2
RIP: 0033:0x457099
Code: 48 8b 54 24 38 48 8b 7c 24 48 eb 8d 48 8b 6c 24 50 48 83 c4 58 c3 48
89 04 24 48 89 5c 24 08 e8 fd a8 fb ff 48 8b 44 24 40 48 <8b> 4c 24 48 48
8b 54 24 38 4c 8b 54 24 18 e9 ee fe ff ff 48 89 74
[ 21475] 0 21475 17617 8745 118784 0 0
syz-executor2
RSP: 002b:00007f98a3edbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
[ 21476] 0 21476 17617 8745 118784 0 0
syz-executor2
RAX: ffffffffffffffda RBX: 00007f98a3edc6d4 RCX: 0000000000457099
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0002000000000000
[ 21477] 0 21477 17617 8745 118784 0 0
syz-executor2
RBP: 00000000009300a0 R08: ffffffffffffffff R09: 0000000000000000
[ 21478] 0 21478 17617 8745 118784 0 0
syz-executor2
R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004cbae8 R14: 00000000004c33c7 R15: 0000000000000000
[ 21479] 0 21479 17617 8745 118784 0 0
syz-executor2
[ 21480] 0 21480 17617 8745 118784 0 0
syz-executor2
[ 21481] 0 21481 17617 8745 118784 0 0
syz-executor2
[ 21482] 0 21482 17617 8745 118784 0 0
syz-executor2
[ 21483] 0 21483 17617 8745 118784 0 0
syz-executor2
[ 21484] 0 21484 17617 8745 118784 0 0
syz-executor2
[ 21485] 0 21485 17617 8745 118784 0 0
syz-executor2
[ 21486] 0 21486 17617 8745 118784 0 0
syz-executor2
[ 21487] 0 21487 17617 8745 114688 0 0
syz-executor2
[ 21488] 0 21488 17617 8745 118784 0 0
syz-executor2
[ 21490] 0 21490 17617 8745 118784 0 0
syz-executor2
[ 21491] 0 21491 17617 8745 118784 0 0
syz-executor2
[ 21492] 0 21492 17617 8745 118784 0 0
syz-executor2
[ 21493] 0 21493 17617 8745 118784 0 0
syz-executor2
[ 21494] 0 21494 17617 8745 118784 0 0
syz-executor2
[ 21495] 0 21495 17617 8745 118784 0 0
syz-executor2
[ 21496] 0 21496 17617 8745 118784 0 0
syz-executor2
[ 21497] 0 21497 17617 8745 118784 0 0
syz-executor2
[ 21498] 0 21498 17617 8745 118784 0 0
syz-executor2
[ 21499] 0 21499 17617 8745 118784 0 0
syz-executor2
[ 21500] 0 21500 17617 8745 114688 0 0
syz-executor2
[ 21501] 0 21501 17617 8745 118784 0 0
syz-executor2
[ 21502] 0 21502 17617 8745 118784 0 0
syz-executor2
[ 21503] 0 21503 17617 8745 118784 0 0
syz-executor2
[ 21504] 0 21504 17617 8745 118784 0 0
syz-executor2
[ 21505] 0 21505 17617 8745 118784 0 0
syz-executor2
[ 21506] 0 21506 17617 8745 118784 0 0
syz-executor2
[ 21507] 0 21507 17617 8745 118784 0 0
syz-executor2
[ 21508] 0 21508 17617 8745 118784 0 0
syz-executor2
[ 21509] 0 21509 17617 8745 118784 0 0
syz-executor2
[ 21510] 0 21510 17617 8745 118784 0 0
syz-executor2
[ 21511] 0 21511 17617 8745 118784 0 0
syz-executor2
[ 21512] 0 21512 17617 8745 118784 0 0
syz-executor2
[ 21513] 0 21513 17617 8745 118784 0 0
syz-executor2
[ 21514] 0 21514 17617 8745 118784 0 0
syz-executor2
[ 21515] 0 21515 17617 8745 118784 0 0
syz-executor2
[ 21516] 0 21516 17617 8745 118784 0 0
syz-executor2
[ 21517] 0 21517 17617 8745 118784 0 0
syz-executor2
[ 21518] 0 21518 17617 8745 118784 0 0
syz-executor2
[ 21519] 0 21519 17617 8745 118784 0 0
syz-executor2
[ 21520] 0 21520 17617 8745 118784 0 0
syz-executor2
[ 21521] 0 21521 17617 8745 118784 0 0
syz-executor2
[ 21522] 0 21522 17617 8745 118784 0 0
syz-executor2
[ 21523] 0 21523 17617 8745 118784 0 0
syz-executor2
[ 21524] 0 21524 17617 8745 118784 0 0
syz-executor2
[ 21525] 0 21525 17617 8745 118784 0 0
syz-executor2
[ 21526] 0 21526 17617 8745 114688 0 0
syz-executor2
[ 21527] 0 21527 17617 8745 118784 0 0
syz-executor2
[ 21528] 0 21528 17617 8745 118784 0 0
syz-executor2
[ 21529] 0 21529 17617 8745 114688 0 0
syz-executor2
[ 21530] 0 21530 17617 8745 114688 0 0
syz-executor2
[ 21531] 0 21531 17617 8745 118784 0 0
syz-executor2
[ 21532] 0 21532 17617 8745 118784 0 0
syz-executor2
[ 21533] 0 21533 17617 8745 118784 0 0
syz-executor2
[ 21534] 0 21534 17617 8745 118784 0 0
syz-executor2
[ 21535] 0 21535 17617 8745 118784 0 0
syz-executor2
[ 21536] 0 21536 17617 8745 118784 0 0
syz-executor2
[ 21537] 0 21537 17617 8745 118784 0 0
syz-executor2
[ 21538] 0 21538 17617 8745 118784 0 0
syz-executor2
[ 21539] 0 21539 17617 8745 118784 0 0
syz-executor2
[ 21540] 0 21540 17617 8745 118784 0 0
syz-executor2
[ 21541] 0 21541 17617 8745 118784 0 0
syz-executor2
[ 21542] 0 21542 17617 8745 118784 0 0
syz-executor2
[ 21543] 0 21543 17617 8745 118784 0 0
syz-executor2
[ 21544] 0 21544 17617 8745 118784 0 0
syz-executor2
[ 21545] 0 21545 17617 8745 118784 0 0
syz-executor2
[ 21546] 0 21546 17617 8745 118784 0 0
syz-executor2
[ 21547] 0 21547 17617 8745 118784 0 0
syz-executor2
[ 21548] 0 21548 17617 8745 118784 0 0
syz-executor2
[ 21549] 0 21549 17617 8745 118784 0 0
syz-executor2
[ 21550] 0 21550 17617 8745 114688 0 0
syz-executor2
[ 21551] 0 21551 17617 8745 118784 0 0
syz-executor2
[ 21552] 0 21552 17617 8745 118784 0 0
syz-executor2
[ 21553] 0 21553 17617 8745 118784 0 0
syz-executor2
[ 21554] 0 21554 17617 8745 118784 0 0
syz-executor2
[ 21555] 0 21555 17617 8745 118784 0 0
syz-executor2
[ 21556] 0 21556 17617 8745 118784 0 0
syz-executor2
[ 21557] 0 21557 17617 8745 118784 0 0
syz-executor2
[ 21558] 0 21558 17617 8745 118784 0 0
syz-executor2
[ 21559] 0 21559 17617 8745 118784 0 0
syz-executor2
[ 21560] 0 21560 17617 8745 118784 0 0
syz-executor2
[ 21561] 0 21561 17617 8745 118784 0 0
syz-executor2
[ 19633] 0 19633 17617 8745 118784 0 0
syz-executor2
[ 21562] 0 21562 17617 8745 118784 0 0
syz-executor2
[ 21563] 0 21563 17617 8745 118784 0 0
syz-executor2
[ 21564] 0 21564 17617 8745 118784 0 0
syz-executor2
[ 21565] 0 21565 17617 8745 118784 0 0
syz-executor2
[ 21566] 0 21566 17617 8745 118784 0 0
syz-executor2
[ 21567] 0 21567 17617 8745 118784 0 0
syz-executor2
[ 21569] 0 21569 17617 8745 118784 0 0
syz-executor2
rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 1-....: (16359 ticks this GP) idle=dfa/1/0x4000000000000002
softirq=39269/39271 fqs=11227
rcu: (t=105003 jiffies g=88877 q=209)
NMI backtrace for cpu 1
CPU: 1 PID: 4301 Comm: syz-fuzzer Not tainted 4.19.0-rc2-next-20180904+ #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_single_cpu_backtrace include/linux/nmi.h:162 [inline]
rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1340
print_cpu_stall.cold.78+0x2fb/0x59c kernel/rcu/tree.c:1478
check_cpu_stall kernel/rcu/tree.c:1550 [inline]
__rcu_pending kernel/rcu/tree.c:3276 [inline]
rcu_pending kernel/rcu/tree.c:3319 [inline]
rcu_check_callbacks+0xd4a/0x15a0 kernel/rcu/tree.c:2665
update_process_times+0x2d/0x70 kernel/time/timer.c:1636
tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164
tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274
__run_hrtimer kernel/time/hrtimer.c:1398 [inline]
__hrtimer_run_queues+0x3eb/0xff0 kernel/time/hrtimer.c:1460
hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1518
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1029 [inline]
smp_apic_timer_interrupt+0x16d/0x6a0 arch/x86/kernel/apic/apic.c:1054
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:867
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:788
[inline]
RIP: 0010:console_unlock+0xc57/0x10d0 kernel/printk/printk.c:2415
Code: c1 e8 03 42 80 3c 30 00 0f 85 40 04 00 00 48 83 3d f5 6c ae 06 00 0f
84 a1 02 00 00 e8 f2 84 19 00 48 8b bd c0 fe ff ff 57 9d <0f> 1f 44 00 00
e9 c3 f5 ff ff e8 da 84 19 00 48 8d 7b 08 48 89 f8
RSP: 0018:ffff8801caf76048 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffff8801cafba640 RBX: 0000000000000200 RCX: 1ffff100395f75ed
RDX: 0000000000000000 RSI: ffffffff8163517e RDI: 0000000000000293
RBP: ffff8801caf761a8 R08: ffff8801cafbae80 R09: 0000000000000006
R10: ffff8801cafba640 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff84214170 R14: dffffc0000000000 R15: 0000000000003301
vprintk_emit+0x33a/0x910 kernel/printk/printk.c:1926
vprintk_default+0x28/0x30 kernel/printk/printk.c:1967
vprintk_func+0x7a/0x117 kernel/printk/printk_safe.c:398
printk+0xa7/0xcf kernel/printk/printk.c:2000
dump_tasks mm/oom_kill.c:420 [inline]
dump_header+0xf0d/0xf70 mm/oom_kill.c:450
oom_kill_process.cold.28+0x10/0x95a mm/oom_kill.c:953
out_of_memory+0xa88/0x1430 mm/oom_kill.c:1120
__alloc_pages_may_oom mm/page_alloc.c:3529 [inline]
__alloc_pages_slowpath+0x223f/0x2cb0 mm/page_alloc.c:4242
__alloc_pages_nodemask+0xa1b/0xd10 mm/page_alloc.c:4397
alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2093
alloc_pages include/linux/gfp.h:509 [inline]
__page_cache_alloc+0x398/0x5e0 mm/filemap.c:946
page_cache_read mm/filemap.c:2385 [inline]
filemap_fault+0x1458/0x2220 mm/filemap.c:2569
ext4_filemap_fault+0x82/0xad fs/ext4/inode.c:6257
__do_fault+0xee/0x450 mm/memory.c:3240
do_read_fault mm/memory.c:3652 [inline]
do_fault mm/memory.c:3752 [inline]
handle_pte_fault mm/memory.c:3983 [inline]
__handle_mm_fault+0x2b4a/0x4350 mm/memory.c:4107
handle_mm_fault+0x53e/0xc80 mm/memory.c:4144
__do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1395
do_page_fault+0xf6/0x7a4 arch/x86/mm/fault.c:1470
page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164
RIP: 0033:0x407e06
Code: cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 83 05 00 00
48 83 ec 58 48 89 6c 24 50 48 8d 6c 24 50 48 8b 54 24 60 <48> 8b 5a 48 48
8b 1b 48 83 fb 30 0f 85 d4 04 00 00 48 8b 5c 24 68
RSP: 002b:000000c4314b7a38 EFLAGS: 00010212
RAX: 0000000000809640 RBX: 000000c4314b7f80 RCX: 000000c420000180
RDX: 0000000000809640 RSI: 000000c4314b7a70 RDI: 000000c4314b7a70
RBP: 000000c4314b7a88 R08: 000000c420019370 R09: 000000c420019578
R10: 0000000000000000 R11: 0000000000000001 R12: 000000c4314b7b90
R13: 000000c4314b7b90 R14: 0000000000000000 R15: 0000000000000000
[ 21570] 0 21570 17617 8745 118784 0 0
syz-executor2
[ 21571] 0 21571 17617 8745 114688 0 0
syz-executor2
[ 21572] 0 21572 17617 8745 118784 0 0
syz-executor2
[ 21573] 0 21573 17617 8745 118784 0 0
syz-executor2
[ 21574] 0 21574 17617 8745 118784 0 0
syz-executor2
[ 21575] 0 21575 17617 8745 118784 0 0
syz-executor2
[ 21576] 0 21576 17617 8745 118784 0 0
syz-executor2
[ 21577] 0 21577 17617 8745 118784 0 0
syz-executor2
[ 21578] 0 21578 17617 8745 118784 0 0
syz-executor2
[ 21579] 0 21579 17617 8745 118784 0 0
syz-executor2
[ 21580] 0 21580 17617 8745 114688 0 0
syz-executor2
[ 21581] 0 21581 17617 8745 118784 0 0
syz-executor2
[ 21582] 0 21582 17617 8745 118784 0 0
syz-executor2
[ 21583] 0 21583 17617 8745 118784 0 0
syz-executor2
[ 21584] 0 21584 17617 8745 118784 0 0
syz-executor2
[ 21585] 0 21585 17617 8745 118784 0 0
syz-executor2
[ 21586] 0 21586 17617 8745 118784 0 0
syz-executor2
[ 21587] 0 21587 17617 8745 118784 0 0
syz-executor2
[ 21588] 0 21588 17617 8745 114688 0 0
syz-executor2
[ 21589] 0 21589 17617 8745 118784 0 0
syz-executor2
[ 21590] 0 21590 17617 8745 118784 0 0
syz-executor2
[ 21591] 0 21591 17617 8745 118784 0 0
syz-executor2
[ 21592] 0 21592 17617 8745 118784 0 0
syz-executor2
[ 21593] 0 21593 17617 8745 118784 0 0
syz-executor2
[ 21594] 0 21594 17617 8745 114688 0 0
syz-executor2
[ 21595] 0 21595 17617 8745 118784 0 0
syz-executor2
[ 21596] 0 21596 17617 8745 114688 0 0
syz-executor2
[ 21597] 0 21597 17617 8745 118784 0 0
syz-executor2
[ 21598] 0 21598 17617 8745 114688 0 0
syz-executor2
[ 21599] 0 21599 17617 8745 118784 0 0
syz-executor2
[ 21600] 0 21600 17617 8745 118784 0 0
syz-executor2
[ 21601] 0 21601 17617 8745 118784 0 0
syz-executor2
[ 21602] 0 21602 17617 8745 118784 0 0
syz-executor2
[ 21604] 0 21604 17617 8745 118784 0 0
syz-executor2
[ 21605] 0 21605 17617 8745 118784 0 0
syz-executor2
[ 21606] 0 21606 17617 8745 118784 0 0
syz-executor2
[ 21607] 0 21607 17617 8745 118784 0 0
syz-executor2
[ 21608] 0 21608 17617 8745 118784 0 0
syz-executor2
[ 21609] 0 21609 17617 8745 114688 0 0
syz-executor2
[ 21610] 0 21610 17617 8745 118784 0 0
syz-executor2
[ 21611] 0 21611 17617 8745 118784 0 0
syz-executor2
[ 21612] 0 21612 17617 8745 118784 0 0
syz-executor2
[ 21613] 0 21613 17617 8745 118784 0 0
syz-executor2
[ 21614] 0 21614 17617 8745 118784 0 0
syz-executor2
[ 21615] 0 21615 17617 8745 118784 0 0
syz-executor2
[ 21616] 0 21616 17617 8745 118784 0 0
syz-executor2
[ 21617] 0 21617 17617 8745 118784 0 0
syz-executor2
[ 21618] 0 21618 17617 8745 118784 0 0
syz-executor2
[ 21619] 0 21619 17617 8745 114688 0 0
syz-executor2
[ 21620] 0 21620 17617 8745 118784 0 0
syz-executor2
[ 21621] 0 21621 17617 8745 118784 0 0
syz-executor2
[ 21622] 0 21622 17617 8745 118784 0 0
syz-executor2
[ 21623] 0 21623 17617 8745 118784 0 0
syz-executor2
[ 21624] 0 21624 17617 8745 118784 0 0
syz-executor2
[ 21625] 0 21625 17617 8745 118784 0 0
syz-executor2
[ 21626] 0 21626 17617 8745 118784 0 0
syz-executor2
[ 21627] 0 21627 17617 8745 118784 0 0
syz-executor2
[ 21628] 0 21628 17617 8745 118784 0 0
syz-executor2
[ 21629] 0 21629 17617 8745 118784 0 0
syz-executor2
[ 21630] 0 21630 17617 8745 118784 0 0
syz-executor2
[ 21631] 0 21631 17617 8745 118784 0 0
syz-executor2
[ 21632] 0 21632 17617 8745 118784 0 0
syz-executor2
[ 21633] 0 21633 17617 8745 118784 0 0
syz-executor2
[ 21634] 0 21634 17617 8745 118784 0 0
syz-executor2
[ 21635] 0 21635 17617 8745 118784 0 0
syz-executor2
[ 21636] 0 21636 17617 8745 118784 0 0
syz-executor2
[ 21637] 0 21637 17617 8745 118784 0 0
syz-executor2
[ 21638] 0 21638 17617 8745 118784 0 0
syz-executor2
[ 21639] 0 21639 17617 8745 118784 0 0
syz-executor2
[ 21640] 0 21640 17617 8745 118784 0 0
syz-executor2
[ 21641] 0 21641 17617 8745 118784 0 0
syz-executor2
[ 21642] 0 21642 17617 8745 118784 0 0
syz-executor2
[ 21643] 0 21643 17617 8745 118784 0 0
syz-executor2
[ 21644] 0 21644 17617 8745 118784 0 0
syz-executor2
[ 21645] 0 21645 17617 8745 118784 0 0
syz-executor2
[ 21646] 0 21646 17617 8745 118784 0 0
syz-executor2
[ 21647] 0 21647 17617 8745 114688 0 0
syz-executor2
[ 21648] 0 21648 17617 8745 118784 0 0
syz-executor2
[ 21649] 0 21649 17617 8745 118784 0 0
syz-executor2
[ 21650] 0 21650 17617 8745 118784 0 0
syz-executor2
[ 21651] 0 21651 17617 8745 118784 0 0
syz-executor2
[ 21652] 0 21652 17617 8745 118784 0 0
syz-executor2
[ 21653] 0 21653 17617 8745 118784 0 0
syz-executor2
[ 21654] 0 21654 17617 8745 118784 0 0
syz-executor2
[ 21655] 0 21655 17617 8745 118784 0 0
syz-executor2
[ 21656] 0 21656 17617 8745 118784 0 0
syz-executor2
[ 21657] 0 21657 17617 8745 118784 0 0
syz-executor2
[ 21658] 0 21658 17617 8745 118784 0 0
syz-executor2
[ 21659] 0 21659 17617 8745 118784 0 0
syz-executor2
[ 21660] 0 21660 17617 8745 118784 0 0
syz-executor2
[ 21661] 0 21661 17617 8745 118784 0 0
syz-executor2
[ 21662] 0 21662 17617 8745 118784 0 0
syz-executor2
[ 21663] 0 21663 17617 8745 114688 0 0
syz-executor2
[ 21664] 0 21664 17617 8745 118784 0 0
syz-executor2
[ 21665] 0 21665 17617 8745 118784 0 0
syz-executor2
[ 21666] 0 21666 17617 8745 118784 0 0
syz-executor2
[ 21667] 0 21667 17617 8745 118784 0 0
syz-executor2
[ 21668] 0 21668 17617 8745 118784 0 0
syz-executor2
[ 21669] 0 21669 17617 8745 118784 0 0
syz-executor2
[ 21670] 0 21670 17617 8745 118784 0 0
syz-executor2
[ 21671] 0 21671 17617 8745 118784 0 0
syz-executor2
[ 21672] 0 21672 17617 8745 118784 0 0
syz-executor2
[ 21673] 0 21673 17617 8745 118784 0 0
syz-executor2
[ 21674] 0 21674 17617 8745 118784 0 0
syz-executor2
[ 21675] 0 21675 17617 8745 118784 0 0
syz-executor2
[ 21676] 0 21676 17617 8745 118784 0 0
syz-executor2
INFO: task syz-executor2:11165 blocked for more than 140 seconds.
[ 21677] 0 21677 17617 8745 118784 0 0
syz-executor2
[ 21678] 0 21678 17617 8745 114688 0 0
syz-executor2
[ 21679] 0 21679 17617 8745 114688 0 0
syz-executor2
[ 21680] 0 21680 17617 8745 118784 0 0
syz-executor2
[ 21681] 0 21681 17617 8745 118784 0 0
syz-executor2
[ 21682] 0 21682 17617 8745 118784 0 0
syz-executor2
[ 21683] 0 21683 17617 8745 118784 0 0
syz-executor2
[ 21684] 0 21684 17617 8745 118784 0 0
syz-executor2
[ 21685] 0 21685 17617 8745 118784 0 0
syz-executor2
[ 21686] 0 21686 17617 8745 118784 0 0
syz-executor2
[ 21687] 0 21687 17617 8745 118784 0 0
syz-executor2
[ 21688] 0 21688 17617 8745 118784 0 0
syz-executor2
[ 21689] 0 21689 17617 8745 118784 0 0
syz-executor2
[ 21690] 0 21690 17617 8745 118784 0 0
syz-executor2
[ 21691] 0 21691 17617 8745 118784 0 0
syz-executor2
[ 21692] 0 21692 17617 8745 118784 0 0
syz-executor2
[ 21693] 0 21693 17617 8745 118784 0 0
syz-executor2
[ 21694] 0 21694 17617 8745 114688 0 0
syz-executor2
[ 21695] 0 21695 17617 8745 118784 0 0
syz-executor2
[ 21696] 0 21696 17617 8745 118784 0 0
syz-executor2
[ 21697] 0 21697 17617 8745 118784 0 0
syz-executor2
[ 21698] 0 21698 17617 8745 118784 0 0
syz-executor2
[ 21699] 0 21699 17617 8745 118784 0 0
syz-executor2
[ 21700] 0 21700 17617 8745 118784 0 0
syz-executor2
[ 21701] 0 21701 17617 8745 118784 0 0
syz-executor2
[ 19683] 0 19683 17617 8745 118784 0 0
syz-executor2
[ 21702] 0 21702 17617 8745 118784 0 0
syz-executor2
[ 21703] 0 21703 17617 8745 118784 0 0
syz-executor2
[ 21704] 0 21704 17617 8745 118784 0 0
syz-executor2
[ 21705] 0 21705 17617 8745 118784 0 0
syz-executor2
[ 21706] 0 21706 17617 8745 114688 0 0
syz-executor2
[ 21707] 0 21707 17617 8745 118784 0 0
syz-executor2
[ 21708] 0 21708 17617 8745 118784 0 0
syz-executor2
[ 21709] 0 21709 17617 8745 118784 0 0
syz-executor2
[ 21710] 0 21710 17617 8745 118784 0 0
syz-executor2
[ 21711] 0 21711 17617 8745 118784 0 0
syz-executor2
[ 21712] 0 21712 17617 8745 118784 0 0
syz-executor2
[ 21713] 0 21713 17617 8745 118784 0 0
syz-executor2
[ 21714] 0 21714 17617 8745 118784 0 0
syz-executor2
[ 21715] 0 21715 17617 8745 118784 0 0
syz-executor2
[ 21716] 0 21716 17617 8745 118784 0 0
syz-executor2
[ 21717] 0 21717 17617 8745 118784 0 0
syz-executor2
[ 21718] 0 21718 17617 8745 114688 0 0
syz-executor2
[ 21719] 0 21719 17617 8745 114688 0 0
syz-executor2
[ 21720] 0 21720 17617 8745 118784 0 0
syz-executor2
[ 21721] 0 21721 17617 8745 118784 0 0
syz-executor2
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 21723] 0 21723 17617 8745 118784 0 0
syz-executor2
syz-executor2 D16520 11165 11010 0x00000000
[ 21724] 0 21724 17617 8745 114688 0 0
syz-executor2
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
[ 21725] 0 21725 17617 8745 118784 0 0
syz-executor2
[ 21726] 0 21726 17617 8745 114688 0 0
syz-executor2
[ 21727] 0 21727 17617 8745 118784 0 0
syz-executor2
[ 21728] 0 21728 17617 8745 118784 0 0
syz-executor2
[ 21729] 0 21729 17617 8745 118784 0 0
syz-executor2
[ 21730] 0 21730 17617 8745 118784 0 0
syz-executor2
schedule+0xfb/0x450 kernel/sched/core.c:3517
[ 21731] 0 21731 17617 8745 118784 0 0
syz-executor2
[ 21732] 0 21732 17617 8745 114688 0 0
syz-executor2
[ 21733] 0 21733 17617 8745 118784 0 0
syz-executor2
[ 21734] 0 21734 17617 8745 118784 0 0
syz-executor2
[ 19716] 0 19716 17617 8745 118784 0 0
syz-executor2
[ 21735] 0 21735 17617 8745 118784 0 0
syz-executor2
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
[ 21736] 0 21736 17617 8745 118784 0 0
syz-executor2
[ 21737] 0 21737 17617 8745 118784 0 0
syz-executor2
[ 21738] 0 21738 17617 8745 118784 0 0
syz-executor2
[ 21739] 0 21739 17617 8745 118784 0 0
syz-executor2
[ 21740] 0 21740 17617 8745 118784 0 0
syz-executor2
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
[ 21741] 0 21741 17617 8745 118784 0 0
syz-executor2
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
down_read+0xc3/0x1d0 kernel/locking/rwsem.c:26
[ 21742] 0 21742 17617 8745 118784 0 0
syz-executor2
[ 21743] 0 21743 17617 8745 118784 0 0
syz-executor2
[ 21744] 0 21744 17617 8745 118784 0 0
syz-executor2
i_mmap_lock_read include/linux/fs.h:500 [inline]
rmap_walk_file+0x7db/0xea0 mm/rmap.c:1876
[ 21745] 0 21745 17617 8745 118784 0 0
syz-executor2
[ 21746] 0 21746 17617 8745 118784 0 0
syz-executor2
[ 21747] 0 21747 17617 8745 114688 0 0
syz-executor2
[ 21748] 0 21748 17617 8745 118784 0 0
syz-executor2
[ 21749] 0 21749 17617 8745 118784 0 0
syz-executor2
[ 21750] 0 21750 17617 8745 118784 0 0
syz-executor2
[ 21751] 0 21751 17617 8745 118784 0 0
syz-executor2
[ 21752] 0 21752 17617 8745 118784 0 0
syz-executor2
[ 21753] 0 21753 17617 8745 118784 0 0
syz-executor2
rmap_walk+0x244/0x370 mm/rmap.c:1904
[ 21754] 0 21754 17617 8745 118784 0 0
syz-executor2
[ 21755] 0 21755 17617 8745 118784 0 0
syz-executor2
[ 21756] 0 21756 17617 8745 114688 0 0
syz-executor2
[ 21757] 0 21757 17617 8745 118784 0 0
syz-executor2
[ 21758] 0 21758 17617 8745 118784 0 0
syz-executor2
page_referenced+0x88c/0xae0 mm/rmap.c:874
[ 21759] 0 21759 17617 8745 118784 0 0
syz-executor2
[ 21760] 0 21760 17617 8745 114688 0 0
syz-executor2
[ 21761] 0 21761 17617 8745 114688 0 0
syz-executor2
[ 21762] 0 21762 17617 8745 118784 0 0
syz-executor2
[ 21763] 0 21763 17617 8745 114688 0 0
syz-executor2
[ 21764] 0 21764 17617 8745 118784 0 0
syz-executor2
[ 21765] 0 21765 17617 8745 118784 0 0
syz-executor2
shrink_active_list+0x88a/0x17b0 mm/vmscan.c:2119
[ 21766] 0 21766 17617 8745 118784 0 0
syz-executor2
[ 19745] 0 19745 17617 8745 118784 0 0
syz-executor2
[ 21767] 0 21767 17617 8745 114688 0 0
syz-executor2
[ 21768] 0 21768 17617 8745 118784 0 0
syz-executor2
[ 21769] 0 21769 17617 8745 118784 0 0
syz-executor2
[ 21770] 0 21770 17617 8745 118784 0 0
syz-executor2
[ 21771] 0 21771 17617 8745 118784 0 0
syz-executor2
[ 21772] 0 21772 17617 8745 118784 0 0
syz-executor2
[ 21773] 0 21773 17617 8745 118784 0 0
syz-executor2
[ 21774] 0 21774 17617 8745 118784 0 0
syz-executor2
[ 21775] 0 21775 17617 8745 118784 0 0
syz-executor2
[ 21776] 0 21776 17617 8745 118784 0 0
syz-executor2
[ 21777] 0 21777 17617 8745 118784 0 0
syz-executor2
shrink_list mm/vmscan.c:2250 [inline]
shrink_node_memcg+0x803/0x18f0 mm/vmscan.c:2517
[ 19752] 0 19752 17617 8745 118784 0 0
syz-executor2
[ 21778] 0 21778 17617 8745 118784 0 0
syz-executor2
[ 21779] 0 21779 17617 8745 118784 0 0
syz-executor2
[ 21781] 0 21781 17617 8745 118784 0 0
syz-executor2
shrink_node+0x3b9/0x16a0 mm/vmscan.c:2732
[ 21782] 0 21782 17617 8745 118784 0 0
syz-executor2
[ 21783] 0 21783 17617 8745 118784 0 0
syz-executor2
[ 21784] 0 21784 17617 8745 118784 0 0
syz-executor2
[ 21785] 0 21785 17617 8745 118784 0 0
syz-executor2
[ 21786] 0 21786 17617 8745 118784 0 0
syz-executor2
[ 21787] 0 21787 17617 8745 118784 0 0
syz-executor2
[ 21788] 0 21788 17617 8745 118784 0 0
syz-executor2
[ 21789] 0 21789 17617 8745 118784 0 0
syz-executor2
shrink_zones mm/vmscan.c:2964 [inline]
do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3026
[ 21790] 0 21790 17617 8745 118784 0 0
syz-executor2
[ 21791] 0 21791 17617 8745 114688 0 0
syz-executor2
[ 21792] 0 21792 17617 8745 118784 0 0
syz-executor2
try_to_free_pages+0x4b2/0xa60 mm/vmscan.c:3241
[ 21793] 0 21793 17617 8745 118784 0 0
syz-executor2
[ 21794] 0 21794 17617 8745 118784 0 0
syz-executor2
[ 21795] 0 21795 17617 8745 118784 0 0
syz-executor2
[ 21796] 0 21796 17617 8745 118784 0 0
syz-executor2
[ 21797] 0 21797 17617 8745 118784 0 0
syz-executor2
[ 21798] 0 21798 17617 8745 118784 0 0
syz-executor2
[ 21799] 0 21799 17617 8745 118784 0 0
syz-executor2
__perform_reclaim mm/page_alloc.c:3776 [inline]
__alloc_pages_direct_reclaim mm/page_alloc.c:3797 [inline]
__alloc_pages_slowpath+0x95a/0x2cb0 mm/page_alloc.c:4198
[ 21800] 0 21800 17617 8745 118784 0 0
syz-executor2
[ 21801] 0 21801 17617 8745 118784 0 0
syz-executor2
[ 21802] 0 21802 17617 8745 114688 0 0
syz-executor2
[ 21803] 0 21803 17617 8745 118784 0 0
syz-executor2
[ 21804] 0 21804 17617 8745 118784 0 0
syz-executor2
[ 21805] 0 21805 17617 8745 118784 0 0
syz-executor2
[ 21806] 0 21806 17617 8745 118784 0 0
syz-executor2
[ 21807] 0 21807 17617 8745 118784 0 0
syz-executor2
[ 21808] 0 21808 17617 8745 118784 0 0
syz-executor2
[ 21810] 0 21810 17617 8745 114688 0 0
syz-executor2
[ 21811] 0 21811 17617 8745 118784 0 0
syz-executor2
[ 21812] 0 21812 17617 8745 118784 0 0
syz-executor2
[ 21813] 0 21813 17617 8745 118784 0 0
syz-executor2
[ 21814] 0 21814 17617 8745 118784 0 0
syz-executor2
[ 21815] 0 21815 17617 8745 118784 0 0
syz-executor2
[ 21816] 0 21816 17617 8745 118784 0 0
syz-executor2
__alloc_pages_nodemask+0xa1b/0xd10 mm/page_alloc.c:4397
[ 21817] 0 21817 17617 8745 118784 0 0
syz-executor2
[ 21818] 0 21818 17617 8745 118784 0 0
syz-executor2
[ 21819] 0 21819 17617 8745 114688 0 0
syz-executor2
[ 21820] 0 21820 17617 8745 118784 0 0
syz-executor2
[ 21821] 0 21821 17617 8745 118784 0 0
syz-executor2
[ 21822] 0 21822 17617 8745 118784 0 0
syz-executor2
[ 21823] 0 21823 17617 8745 118784 0 0
syz-executor2
[ 21824] 0 21824 17617 8745 114688 0 0
syz-executor2
__alloc_pages include/linux/gfp.h:473 [inline]
__alloc_pages_node include/linux/gfp.h:486 [inline]
kmem_getpages mm/slab.c:1409 [inline]
cache_grow_begin+0x91/0x710 mm/slab.c:2677
[ 21825] 0 21825 17617 8745 118784 0 0
syz-executor2
[ 21826] 0 21826 17617 8745 118784 0 0
syz-executor2
fallback_alloc+0x203/0x2c0 mm/slab.c:3219
[ 21827] 0 21827 17617 8745 118784 0 0
syz-executor2
____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287
[ 21828] 0 21828 17617 8745 114688 0 0
syz-executor2
__do_cache_alloc mm/slab.c:3356 [inline]
slab_alloc mm/slab.c:3384 [inline]
kmem_cache_alloc+0x1e5/0x710 mm/slab.c:3552
[ 21829] 0 21829 17617 8745 118784 0 0
syz-executor2
vm_area_dup+0x7a/0x220 kernel/fork.c:324
[ 21830] 0 21830 17617 8745 118784 0 0
syz-executor2
[ 21831] 0 21831 17617 8745 118784 0 0
syz-executor2
dup_mmap kernel/fork.c:485 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x3a48/0x7af0 kernel/fork.c:1870
[ 21832] 0 21832 17617 8745 118784 0 0
syz-executor2
[ 21833] 0 21833 17617 8745 118784 0 0
syz-executor2
[ 21834] 0 21834 17617 8745 118784 0 0
syz-executor2
[ 21835] 0 21835 17617 8745 118784 0 0
syz-executor2
[ 21836] 0 21836 17617 8745 118784 0 0
syz-executor2
[ 21837] 0 21837 17617 8745 118784 0 0
syz-executor2
[ 21838] 0 21838 17617 8745 118784 0 0
syz-executor2
[ 21839] 0 21839 17617 8745 118784 0 0
syz-executor2
[ 21840] 0 21840 17617 8745 118784 0 0
syz-executor2
[ 21841] 0 21841 17617 8745 114688 0 0
syz-executor2
[ 21842] 0 21842 17617 8745 118784 0 0
syz-executor2
[ 21843] 0 21843 17617 8745 118784 0 0
syz-executor2
[ 21844] 0 21844 17617 8745 118784 0 0
syz-executor2
[ 21845] 0 21845 17617 8745 118784 0 0
syz-executor2
[ 21846] 0 21846 17617 8745 118784 0 0
syz-executor2
[ 21847] 0 21847 17617 8745 118784 0 0
syz-executor2
[ 21848] 0 21848 17617 8745 118784 0 0
syz-executor2
[ 21849] 0 21849 17617 8745 118784 0 0
syz-executor2
[ 21850] 0 21850 17617 8745 118784 0 0
syz-executor2
[ 21851] 0 21851 17617 8745 118784 0 0
syz-executor2
[ 21852] 0 21852 17617 8745 118784 0 0
syz-executor2
[ 21853] 0 21853 17617 8745 118784 0 0
syz-executor2
[ 21854] 0 21854 17617 8745 118784 0 0
syz-executor2
[ 21855] 0 21855 17617 8745 114688 0 0
syz-executor2
[ 21856] 0 21856 17617 8745 118784 0 0
syz-executor2
[ 21857] 0 21857 17617 8745 118784 0 0
syz-executor2
[ 21858] 0 21858 17617 8745 118784 0 0
syz-executor2
[ 21859] 0 21859 17617 8745 114688 0 0
syz-executor2
[ 21860] 0 21860 17617 8745 118784 0 0
syz-executor2
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
[ 21861] 0 21861 17617 8745 118784 0 0
syz-executor2
[ 21862] 0 21862 17617 8745 118784 0 0
syz-executor2
[ 21863] 0 21863 17617 8745 118784 0 0
syz-executor2
[ 21864] 0 21864 17617 8745 118784 0 0
syz-executor2
[ 21865] 0 21865 17617 8745 118784 0 0
syz-executor2
[ 21866] 0 21866 17617 8745 118784 0 0
syz-executor2
[ 21867] 0 21867 17617 8745 118784 0 0
syz-executor2
[ 21868] 0 21868 17617 8745 118784 0 0
syz-executor2
[ 21869] 0 21869 17617 8745 118784 0 0
syz-executor2
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
[ 21870] 0 21870 17617 8745 118784 0 0
syz-executor2
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
[ 21871] 0 21871 17617 8745 118784 0 0
syz-executor2
[ 21872] 0 21872 17617 8745 118784 0 0
syz-executor2
[ 21873] 0 21873 17617 8745 114688 0 0
syz-executor2
[ 21874] 0 21874 17617 8745 118784 0 0
syz-executor2
[ 21875] 0 21875 17617 8745 118784 0 0
syz-executor2
entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 21876] 0 21876 17617 8745 118784 0 0
syz-executor2
RIP: 0033:0x457099
Code: 48 8b 54 24 38 48 8b 7c 24 48 eb 8d 48 8b 6c 24 50 48 83 c4 58 c3 48
89 04 24 48 89 5c 24 08 e8 fd a8 fb ff 48 8b 44 24 40 48 <8b> 4c 24 48 48
8b 54 24 38 4c 8b 54 24 18 e9 ee fe ff ff 48 89 74
[ 21877] 0 21877 17617 8745 118784 0 0
syz-executor2
RSP: 002b:00007f98a3edbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
[ 21878] 0 21878 17617 8745 118784 0 0
syz-executor2
RAX: ffffffffffffffda RBX: 00007f98a3edc6d4 RCX: 0000000000457099
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0002000000000000
[ 21879] 0 21879 17617 8745 118784 0 0
syz-executor2
RBP: 00000000009300a0 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff
[ 21880] 0 21880 17617 8745 118784 0 0
syz-executor2
R13: 00000000004cbae8 R14: 00000000004c33c7 R15: 0000000000000000
INFO: task syz-executor2:11249 blocked for more than 140 seconds.
[ 21881] 0 21881 17617 8745 118784 0 0
syz-executor2
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 21882] 0 21882 17617 8745 118784 0 0
syz-executor2
syz-executor2 D23064 11249 10868 0x00000000
[ 21883] 0 21883 17617 8745 118784 0 0
syz-executor2
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
[ 21884] 0 21884 17617 8745 118784 0 0
syz-executor2
[ 21885] 0 21885 17617 8745 118784 0 0
syz-executor2
[ 21886] 0 21886 17617 8745 118784 0 0
syz-executor2
[ 21887] 0 21887 17617 8745 114688 0 0
syz-executor2
[ 21888] 0 21888 17617 8745 118784 0 0
syz-executor2
[ 21889] 0 21889 17617 8745 118784 0 0
syz-executor2
schedule+0xfb/0x450 kernel/sched/core.c:3517
[ 21890] 0 21890 17617 8745 114688 0 0
syz-executor2
[ 21891] 0 21891 17617 8745 114688 0 0
syz-executor2
[ 21892] 0 21892 17617 8745 114688 0 0
syz-executor2
[ 21893] 0 21893 17617 8745 118784 0 0
syz-executor2
[ 21894] 0 21894 17617 8745 114688 0 0
syz-executor2
[ 21895] 0 21895 17617 8745 118784 0 0
syz-executor2
[ 21896] 0 21896 17617 8745 118784 0 0
syz-executor2
__rwsem_down_write_failed_common+0x98b/0x1650
kernel/locking/rwsem-xadd.c:566
[ 21897] 0 21897 17617 8745 118784 0 0
syz-executor2
[ 21898] 0 21898 17617 8745 118784 0 0
syz-executor2
[ 21899] 0 21899 17617 8745 118784 0 0
syz-executor2
[ 21900] 0 21900 17617 8745 118784 0 0
syz-executor2
[ 21901] 0 21901 17617 8745 114688 0 0
syz-executor2
[ 21902] 0 21902 17617 8745 118784 0 0
syz-executor2
[ 21903] 0 21903 17617 8745 118784 0 0
syz-executor2
[ 21904] 0 21904 17617 8745 118784 0 0
syz-executor2
[ 21905] 0 21905 17617 8745 118784 0 0
syz-executor2
[ 21906] 0 21906 17617 8745 118784 0 0
syz-executor2
[ 21907] 0 21907 17617 8745 114688 0 0
syz-executor2
[ 21908] 0 21908 17617 8745 114688 0 0
syz-executor2
[ 21909] 0 21909 17617 8745 118784 0 0
syz-executor2
[ 21910] 0 21910 17617 8745 118784 0 0
syz-executor2
[ 21911] 0 21911 17617 8745 118784 0 0
syz-executor2
[ 21912] 0 21912 17617 8745 118784 0 0
syz-executor2
[ 21913] 0 21913 17617 8745 114688 0 0
syz-executor2
[ 21914] 0 21914 17617 8745 118784 0 0
syz-executor2
[ 21915] 0 21915 17617 8745 118784 0 0
syz-executor2
[ 21916] 0 21916 17617 8745 118784 0 0
syz-executor2
rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
[ 21918] 0 21918 17617 8745 118784 0 0
syz-executor2
call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
[ 21919] 0 21919 17617 8745 118784 0 0
syz-executor2
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0xaa/0x130 kernel/locking/rwsem.c:72
[ 21920] 0 21920 17617 8745 118784 0 0
syz-executor2
[ 21921] 0 21921 17617 8745 118784 0 0
syz-executor2
[ 21922] 0 21922 17617 8745 114688 0 0
syz-executor2
i_mmap_lock_write include/linux/fs.h:490 [inline]
dup_mmap kernel/fork.c:512 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x3ca3/0x7af0 kernel/fork.c:1870
[ 21923] 0 21923 17617 8745 118784 0 0
syz-executor2
[ 21924] 0 21924 17617 8745 118784 0 0
syz-executor2
[ 21925] 0 21925 17617 8745 118784 0 0
syz-executor2
[ 21926] 0 21926 17617 8745 114688 0 0
syz-executor2
[ 21927] 0 21927 1761
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
syzbot found the following crash on:
HEAD commit: f2b6e66e9885 Add linux-next specific files for 20180904
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13de9e49400000
kernel config: https://syzkaller.appspot.com/x/.config?x=15ad48400e39c1b3
dashboard link: https://syzkaller.appspot.com/bug?extid=0d867757fdc016c0157e
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
CC: [linux-...@vger.kernel.org pml...@suse.com
ros...@goodmis.org sergey.se...@gmail.com]
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0d8677...@syzkaller.appspotmail.com
[ 21298] 0 21298 17617 8745 114688 0 0
syz-executor2
[ 21299] 0 21299 17617 8745 118784 0 0
syz-executor2
[ 21300] 0 21300 17617 8745 118784 0 0
syz-executor2
[ 21301] 0 21301 17617 8745 118784 0 0
syz-executor2
[ 21302] 0 21302 17617 8745 114688 0 0
syz-executor2
INFO: task syz-executor2:10921 blocked for more than 140 seconds.
[ 21303] 0 21303 17617 8745 118784 0 0
syz-executor2
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 21304] 0 21304 17617 8745 118784 0 0
syz-executor2
syz-executor2 D22568 10921 10772 0x00000000
[ 21305] 0 21305 17617 8745 118784 0 0
syz-executor2
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
[ 21306] 0 21306 17617 8745 118784 0 0
syz-executor2
[ 21307] 0 21307 17617 8745 118784 0 0
syz-executor2
[ 21308] 0 21308 17617 8745 118784 0 0
syz-executor2
[ 21309] 0 21309 17617 8745 118784 0 0
syz-executor2
[ 21310] 0 21310 17617 8745 118784 0 0
syz-executor2
[ 21311] 0 21311 17617 8745 118784 0 0
syz-executor2
schedule+0xfb/0x450 kernel/sched/core.c:3517
[ 21312] 0 21312 17617 8745 118784 0 0
syz-executor2
[ 21313] 0 21313 17617 8745 118784 0 0
syz-executor2
[ 21314] 0 21314 17617 8745 118784 0 0
syz-executor2
[ 21315] 0 21315 17617 8745 118784 0 0
syz-executor2
[ 21316] 0 21316 17617 8745 118784 0 0
syz-executor2
__rwsem_down_write_failed_common+0x98b/0x1650
kernel/locking/rwsem-xadd.c:566
[ 21317] 0 21317 17617 8745 118784 0 0
syz-executor2
[ 21318] 0 21318 17617 8745 118784 0 0
syz-executor2
[ 21319] 0 21319 17617 8745 118784 0 0
syz-executor2
[ 21320] 0 21320 17617 8745 118784 0 0
syz-executor2
[ 21321] 0 21321 17617 8745 118784 0 0
syz-executor2
[ 21322] 0 21322 17617 8745 118784 0 0
syz-executor2
[ 21323] 0 21323 17617 8745 118784 0 0
syz-executor2
[ 21324] 0 21324 17617 8745 118784 0 0
syz-executor2
[ 21325] 0 21325 17617 8745 118784 0 0
syz-executor2
[ 21326] 0 21326 17617 8745 114688 0 0
syz-executor2
[ 21327] 0 21327 17617 8745 118784 0 0
syz-executor2
[ 21328] 0 21328 17617 8745 118784 0 0
syz-executor2
[ 21329] 0 21329 17617 8745 118784 0 0
syz-executor2
[ 21330] 0 21330 17617 8745 118784 0 0
syz-executor2
[ 21331] 0 21331 17617 8745 118784 0 0
syz-executor2
[ 21332] 0 21332 17617 8745 118784 0 0
syz-executor2
[ 21333] 0 21333 17617 8745 118784 0 0
syz-executor2
[ 21334] 0 21334 17617 8745 118784 0 0
syz-executor2
[ 21335] 0 21335 17617 8745 118784 0 0
syz-executor2
[ 21336] 0 21336 17617 8745 118784 0 0
syz-executor2
rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
[ 21337] 0 21337 17617 8745 118784 0 0
syz-executor2
call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
[ 21338] 0 21338 17617 8745 118784 0 0
syz-executor2
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0xaa/0x130 kernel/locking/rwsem.c:72
[ 21339] 0 21339 17617 8745 118784 0 0
syz-executor2
[ 21340] 0 21340 17617 8745 118784 0 0
syz-executor2
[ 21341] 0 21341 17617 8745 118784 0 0
syz-executor2
i_mmap_lock_write include/linux/fs.h:490 [inline]
dup_mmap kernel/fork.c:512 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x3ca3/0x7af0 kernel/fork.c:1870
[ 21342] 0 21342 17617 8745 118784 0 0
syz-executor2
[ 21343] 0 21343 17617 8745 118784 0 0
syz-executor2
[ 21344] 0 21344 17617 8745 118784 0 0
syz-executor2
[ 21345] 0 21345 17617 8745 118784 0 0
syz-executor2
[ 21346] 0 21346 17617 8745 118784 0 0
syz-executor2
[ 21347] 0 21347 17617 8745 118784 0 0
syz-executor2
[ 21348] 0 21348 17617 8745 118784 0 0
syz-executor2
[ 21349] 0 21349 17617 8745 118784 0 0
syz-executor2
[ 19354] 0 19354 17617 8745 118784 0 0
syz-executor2
[ 21350] 0 21350 17617 8745 118784 0 0
syz-executor2
[ 21351] 0 21351 17617 8745 118784 0 0
syz-executor2
[ 21352] 0 21352 17617 8745 114688 0 0
syz-executor2
[ 21353] 0 21353 17617 8745 118784 0 0
syz-executor2
[ 21354] 0 21354 17617 8745 118784 0 0
syz-executor2
[ 21355] 0 21355 17617 8745 118784 0 0
syz-executor2
[ 21356] 0 21356 17617 8745 118784 0 0
syz-executor2
[ 21357] 0 21357 17617 8745 118784 0 0
syz-executor2
[ 21358] 0 21358 17617 8745 118784 0 0
syz-executor2
[ 21359] 0 21359 17617 8745 118784 0 0
syz-executor2
[ 21360] 0 21360 17617 8745 118784 0 0
syz-executor2
[ 21361] 0 21361 17617 8745 118784 0 0
syz-executor2
[ 21362] 0 21362 17617 8745 118784 0 0
syz-executor2
[ 21363] 0 21363 17617 8745 118784 0 0
syz-executor2
[ 21364] 0 21364 17617 8745 118784 0 0
syz-executor2
[ 21365] 0 21365 17617 8745 118784 0 0
syz-executor2
[ 21366] 0 21366 17617 8745 118784 0 0
syz-executor2
[ 21367] 0 21367 17617 8745 118784 0 0
syz-executor2
[ 21368] 0 21368 17617 8745 118784 0 0
syz-executor2
[ 21369] 0 21369 17617 8745 118784 0 0
syz-executor2
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
[ 21370] 0 21370 17617 8745 118784 0 0
syz-executor2
[ 21371] 0 21371 17617 8745 118784 0 0
syz-executor2
[ 21372] 0 21372 17617 8745 118784 0 0
syz-executor2
[ 21373] 0 21373 17617 8745 118784 0 0
syz-executor2
[ 21374] 0 21374 17617 8745 118784 0 0
syz-executor2
[ 21376] 0 21376 17617 8745 118784 0 0
syz-executor2
[ 21377] 0 21377 17617 8745 118784 0 0
syz-executor2
[ 21378] 0 21378 17617 8745 118784 0 0
syz-executor2
[ 21379] 0 21379 17617 8745 114688 0 0
syz-executor2
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
[ 21380] 0 21380 17617 8745 118784 0 0
syz-executor2
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
[ 21381] 0 21381 17617 8745 118784 0 0
syz-executor2
[ 21382] 0 21382 17617 8745 118784 0 0
syz-executor2
[ 21383] 0 21383 17617 8745 118784 0 0
syz-executor2
[ 21384] 0 21384 17617 8745 118784 0 0
syz-executor2
[ 21385] 0 21385 17617 8745 118784 0 0
syz-executor2
entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 21386] 0 21386 17617 8745 118784 0 0
syz-executor2
RIP: 0033:0x457099
Code: 48 8b 54 24 38 48 8b 7c 24 48 eb 8d 48 8b 6c 24 50 48 83 c4 58 c3 48
89 04 24 48 89 5c 24 08 e8 fd a8 fb ff 48 8b 44 24 40 48 <8b> 4c 24 48 48
8b 54 24 38 4c 8b 54 24 18 e9 ee fe ff ff 48 89 74
[ 21387] 0 21387 17617 8745 118784 0 0
syz-executor2
RSP: 002b:00007f98a3edbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
[ 21388] 0 21388 17617 8745 118784 0 0
syz-executor2
RAX: ffffffffffffffda RBX: 00007f98a3edc6d4 RCX: 0000000000457099
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0002000000000000
[ 21389] 0 21389 17617 8745 118784 0 0
syz-executor2
RBP: 00000000009300a0 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff
[ 21390] 0 21390 17617 8745 118784 0 0
syz-executor2
R13: 00000000004cbae8 R14: 00000000004c33c7 R15: 0000000000000000
INFO: task syz-executor2:11028 blocked for more than 140 seconds.
[ 21391] 0 21391 17617 8745 118784 0 0
syz-executor2
Not tainted 4.19.0-rc2-next-20180904+ #55
[ 21392] 0 21392 17617 8745 114688 0 0
syz-executor2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2 D
[ 21393] 0 21393 17617 8745 118784 0 0
syz-executor2
22504 11028 10805 0x00000000
[ 21394] 0 21394 17617 8745 118784 0 0
syz-executor2
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
[ 21395] 0 21395 17617 8745 118784 0 0
syz-executor2
[ 21396] 0 21396 17617 8745 118784 0 0
syz-executor2
[ 21397] 0 21397 17617 8745 118784 0 0
syz-executor2
[ 21398] 0 21398 17617 8745 118784 0 0
syz-executor2
[ 21399] 0 21399 17617 8745 118784 0 0
syz-executor2
schedule+0xfb/0x450 kernel/sched/core.c:3517
[ 21400] 0 21400 17617 8745 118784 0 0
syz-executor2
[ 21401] 0 21401 17617 8745 118784 0 0
syz-executor2
[ 21402] 0 21402 17617 8745 118784 0 0
syz-executor2
[ 21403] 0 21403 17617 8745 118784 0 0
syz-executor2
[ 21404] 0 21404 17617 8745 118784 0 0
syz-executor2
__rwsem_down_write_failed_common+0x98b/0x1650
kernel/locking/rwsem-xadd.c:566
[ 21405] 0 21405 17617 8745 114688 0 0
syz-executor2
[ 21406] 0 21406 17617 8745 118784 0 0
syz-executor2
[ 21407] 0 21407 17617 8745 118784 0 0
syz-executor2
[ 21408] 0 21408 17617 8745 118784 0 0
syz-executor2
[ 21409] 0 21409 17617 8745 118784 0 0
syz-executor2
[ 21410] 0 21410 17617 8745 118784 0 0
syz-executor2
[ 21411] 0 21411 17617 8745 118784 0 0
syz-executor2
[ 21412] 0 21412 17617 8745 118784 0 0
syz-executor2
[ 21413] 0 21413 17617 8745 118784 0 0
syz-executor2
[ 21414] 0 21414 17617 8745 118784 0 0
syz-executor2
[ 21415] 0 21415 17617 8745 118784 0 0
syz-executor2
[ 21416] 0 21416 17617 8745 118784 0 0
syz-executor2
[ 21417] 0 21417 17617 8745 118784 0 0
syz-executor2
[ 21419] 0 21419 17617 8745 118784 0 0
syz-executor2
[ 21420] 0 21420 17617 8745 114688 0 0
syz-executor2
[ 21421] 0 21421 17617 8745 118784 0 0
syz-executor2
[ 21422] 0 21422 17617 8745 114688 0 0
syz-executor2
[ 21423] 0 21423 17617 8745 118784 0 0
syz-executor2
rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
[ 21424] 0 21424 17617 8745 118784 0 0
syz-executor2
[ 21425] 0 21425 17617 8745 118784 0 0
syz-executor2
call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0xaa/0x130 kernel/locking/rwsem.c:72
[ 21426] 0 21426 17617 8745 118784 0 0
syz-executor2
[ 21427] 0 21427 17617 8745 118784 0 0
syz-executor2
i_mmap_lock_write include/linux/fs.h:490 [inline]
dup_mmap kernel/fork.c:512 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x3ca3/0x7af0 kernel/fork.c:1870
[ 21428] 0 21428 17617 8745 118784 0 0
syz-executor2
[ 21429] 0 21429 17617 8745 118784 0 0
syz-executor2
[ 21430] 0 21430 17617 8745 118784 0 0
syz-executor2
[ 21431] 0 21431 17617 8745 114688 0 0
syz-executor2
[ 21432] 0 21432 17617 8745 118784 0 0
syz-executor2
[ 21433] 0 21433 17617 8745 118784 0 0
syz-executor2
[ 21434] 0 21434 17617 8745 118784 0 0
syz-executor2
[ 21435] 0 21435 17617 8745 118784 0 0
syz-executor2
[ 21437] 0 21437 17617 8745 118784 0 0
syz-executor2
[ 21438] 0 21438 17617 8745 118784 0 0
syz-executor2
[ 21439] 0 21439 17617 8745 118784 0 0
syz-executor2
[ 21440] 0 21440 17617 8745 118784 0 0
syz-executor2
[ 21441] 0 21441 17617 8745 118784 0 0
syz-executor2
[ 21442] 0 21442 17617 8745 118784 0 0
syz-executor2
[ 21443] 0 21443 17617 8745 114688 0 0
syz-executor2
[ 21444] 0 21444 17617 8745 118784 0 0
syz-executor2
[ 21445] 0 21445 17617 8745 118784 0 0
syz-executor2
[ 21446] 0 21446 17617 8745 118784 0 0
syz-executor2
[ 21447] 0 21447 17617 8745 114688 0 0
syz-executor2
[ 21448] 0 21448 17617 8745 118784 0 0
syz-executor2
[ 21449] 0 21449 17617 8745 118784 0 0
syz-executor2
[ 21450] 0 21450 17617 8745 118784 0 0
syz-executor2
[ 21451] 0 21451 17617 8745 118784 0 0
syz-executor2
[ 21452] 0 21452 17617 8745 118784 0 0
syz-executor2
[ 21453] 0 21453 17617 8745 118784 0 0
syz-executor2
[ 21454] 0 21454 17617 8745 118784 0 0
syz-executor2
[ 21455] 0 21455 17617 8745 118784 0 0
syz-executor2
[ 21456] 0 21456 17617 8745 118784 0 0
syz-executor2
[ 21457] 0 21457 17617 8745 114688 0 0
syz-executor2
[ 21458] 0 21458 17617 8745 118784 0 0
syz-executor2
[ 21459] 0 21459 17617 8745 114688 0 0
syz-executor2
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
[ 21460] 0 21460 17617 8745 118784 0 0
syz-executor2
[ 21461] 0 21461 17617 8745 118784 0 0
syz-executor2
[ 21462] 0 21462 17617 8745 118784 0 0
syz-executor2
[ 21463] 0 21463 17617 8745 118784 0 0
syz-executor2
[ 21464] 0 21464 17617 8745 118784 0 0
syz-executor2
[ 21465] 0 21465 17617 8745 118784 0 0
syz-executor2
[ 21466] 0 21466 17617 8745 118784 0 0
syz-executor2
[ 19538] 0 19538 17617 8745 118784 0 0
syz-executor2
[ 21467] 0 21467 17617 8745 118784 0 0
syz-executor2
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
[ 21468] 0 21468 17617 8745 114688 0 0
syz-executor2
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
[ 21469] 0 21469 17617 8745 118784 0 0
syz-executor2
[ 21470] 0 21470 17617 8745 118784 0 0
syz-executor2
[ 21471] 0 21471 17617 8745 118784 0 0
syz-executor2
[ 21472] 0 21472 17617 8745 118784 0 0
syz-executor2
[ 21473] 0 21473 17617 8745 118784 0 0
syz-executor2
entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 21474] 0 21474 17617 8745 118784 0 0
syz-executor2
RIP: 0033:0x457099
Code: 48 8b 54 24 38 48 8b 7c 24 48 eb 8d 48 8b 6c 24 50 48 83 c4 58 c3 48
89 04 24 48 89 5c 24 08 e8 fd a8 fb ff 48 8b 44 24 40 48 <8b> 4c 24 48 48
8b 54 24 38 4c 8b 54 24 18 e9 ee fe ff ff 48 89 74
[ 21475] 0 21475 17617 8745 118784 0 0
syz-executor2
RSP: 002b:00007f98a3edbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
[ 21476] 0 21476 17617 8745 118784 0 0
syz-executor2
RAX: ffffffffffffffda RBX: 00007f98a3edc6d4 RCX: 0000000000457099
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0002000000000000
[ 21477] 0 21477 17617 8745 118784 0 0
syz-executor2
RBP: 00000000009300a0 R08: ffffffffffffffff R09: 0000000000000000
[ 21478] 0 21478 17617 8745 118784 0 0
syz-executor2
R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004cbae8 R14: 00000000004c33c7 R15: 0000000000000000
[ 21479] 0 21479 17617 8745 118784 0 0
syz-executor2
[ 21480] 0 21480 17617 8745 118784 0 0
syz-executor2
[ 21481] 0 21481 17617 8745 118784 0 0
syz-executor2
[ 21482] 0 21482 17617 8745 118784 0 0
syz-executor2
[ 21483] 0 21483 17617 8745 118784 0 0
syz-executor2
[ 21484] 0 21484 17617 8745 118784 0 0
syz-executor2
[ 21485] 0 21485 17617 8745 118784 0 0
syz-executor2
[ 21486] 0 21486 17617 8745 118784 0 0
syz-executor2
[ 21487] 0 21487 17617 8745 114688 0 0
syz-executor2
[ 21488] 0 21488 17617 8745 118784 0 0
syz-executor2
[ 21490] 0 21490 17617 8745 118784 0 0
syz-executor2
[ 21491] 0 21491 17617 8745 118784 0 0
syz-executor2
[ 21492] 0 21492 17617 8745 118784 0 0
syz-executor2
[ 21493] 0 21493 17617 8745 118784 0 0
syz-executor2
[ 21494] 0 21494 17617 8745 118784 0 0
syz-executor2
[ 21495] 0 21495 17617 8745 118784 0 0
syz-executor2
[ 21496] 0 21496 17617 8745 118784 0 0
syz-executor2
[ 21497] 0 21497 17617 8745 118784 0 0
syz-executor2
[ 21498] 0 21498 17617 8745 118784 0 0
syz-executor2
[ 21499] 0 21499 17617 8745 118784 0 0
syz-executor2
[ 21500] 0 21500 17617 8745 114688 0 0
syz-executor2
[ 21501] 0 21501 17617 8745 118784 0 0
syz-executor2
[ 21502] 0 21502 17617 8745 118784 0 0
syz-executor2
[ 21503] 0 21503 17617 8745 118784 0 0
syz-executor2
[ 21504] 0 21504 17617 8745 118784 0 0
syz-executor2
[ 21505] 0 21505 17617 8745 118784 0 0
syz-executor2
[ 21506] 0 21506 17617 8745 118784 0 0
syz-executor2
[ 21507] 0 21507 17617 8745 118784 0 0
syz-executor2
[ 21508] 0 21508 17617 8745 118784 0 0
syz-executor2
[ 21509] 0 21509 17617 8745 118784 0 0
syz-executor2
[ 21510] 0 21510 17617 8745 118784 0 0
syz-executor2
[ 21511] 0 21511 17617 8745 118784 0 0
syz-executor2
[ 21512] 0 21512 17617 8745 118784 0 0
syz-executor2
[ 21513] 0 21513 17617 8745 118784 0 0
syz-executor2
[ 21514] 0 21514 17617 8745 118784 0 0
syz-executor2
[ 21515] 0 21515 17617 8745 118784 0 0
syz-executor2
[ 21516] 0 21516 17617 8745 118784 0 0
syz-executor2
[ 21517] 0 21517 17617 8745 118784 0 0
syz-executor2
[ 21518] 0 21518 17617 8745 118784 0 0
syz-executor2
[ 21519] 0 21519 17617 8745 118784 0 0
syz-executor2
[ 21520] 0 21520 17617 8745 118784 0 0
syz-executor2
[ 21521] 0 21521 17617 8745 118784 0 0
syz-executor2
[ 21522] 0 21522 17617 8745 118784 0 0
syz-executor2
[ 21523] 0 21523 17617 8745 118784 0 0
syz-executor2
[ 21524] 0 21524 17617 8745 118784 0 0
syz-executor2
[ 21525] 0 21525 17617 8745 118784 0 0
syz-executor2
[ 21526] 0 21526 17617 8745 114688 0 0
syz-executor2
[ 21527] 0 21527 17617 8745 118784 0 0
syz-executor2
[ 21528] 0 21528 17617 8745 118784 0 0
syz-executor2
[ 21529] 0 21529 17617 8745 114688 0 0
syz-executor2
[ 21530] 0 21530 17617 8745 114688 0 0
syz-executor2
[ 21531] 0 21531 17617 8745 118784 0 0
syz-executor2
[ 21532] 0 21532 17617 8745 118784 0 0
syz-executor2
[ 21533] 0 21533 17617 8745 118784 0 0
syz-executor2
[ 21534] 0 21534 17617 8745 118784 0 0
syz-executor2
[ 21535] 0 21535 17617 8745 118784 0 0
syz-executor2
[ 21536] 0 21536 17617 8745 118784 0 0
syz-executor2
[ 21537] 0 21537 17617 8745 118784 0 0
syz-executor2
[ 21538] 0 21538 17617 8745 118784 0 0
syz-executor2
[ 21539] 0 21539 17617 8745 118784 0 0
syz-executor2
[ 21540] 0 21540 17617 8745 118784 0 0
syz-executor2
[ 21541] 0 21541 17617 8745 118784 0 0
syz-executor2
[ 21542] 0 21542 17617 8745 118784 0 0
syz-executor2
[ 21543] 0 21543 17617 8745 118784 0 0
syz-executor2
[ 21544] 0 21544 17617 8745 118784 0 0
syz-executor2
[ 21545] 0 21545 17617 8745 118784 0 0
syz-executor2
[ 21546] 0 21546 17617 8745 118784 0 0
syz-executor2
[ 21547] 0 21547 17617 8745 118784 0 0
syz-executor2
[ 21548] 0 21548 17617 8745 118784 0 0
syz-executor2
[ 21549] 0 21549 17617 8745 118784 0 0
syz-executor2
[ 21550] 0 21550 17617 8745 114688 0 0
syz-executor2
[ 21551] 0 21551 17617 8745 118784 0 0
syz-executor2
[ 21552] 0 21552 17617 8745 118784 0 0
syz-executor2
[ 21553] 0 21553 17617 8745 118784 0 0
syz-executor2
[ 21554] 0 21554 17617 8745 118784 0 0
syz-executor2
[ 21555] 0 21555 17617 8745 118784 0 0
syz-executor2
[ 21556] 0 21556 17617 8745 118784 0 0
syz-executor2
[ 21557] 0 21557 17617 8745 118784 0 0
syz-executor2
[ 21558] 0 21558 17617 8745 118784 0 0
syz-executor2
[ 21559] 0 21559 17617 8745 118784 0 0
syz-executor2
[ 21560] 0 21560 17617 8745 118784 0 0
syz-executor2
[ 21561] 0 21561 17617 8745 118784 0 0
syz-executor2
[ 19633] 0 19633 17617 8745 118784 0 0
syz-executor2
[ 21562] 0 21562 17617 8745 118784 0 0
syz-executor2
[ 21563] 0 21563 17617 8745 118784 0 0
syz-executor2
[ 21564] 0 21564 17617 8745 118784 0 0
syz-executor2
[ 21565] 0 21565 17617 8745 118784 0 0
syz-executor2
[ 21566] 0 21566 17617 8745 118784 0 0
syz-executor2
[ 21567] 0 21567 17617 8745 118784 0 0
syz-executor2
[ 21569] 0 21569 17617 8745 118784 0 0
syz-executor2
rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 1-....: (16359 ticks this GP) idle=dfa/1/0x4000000000000002
softirq=39269/39271 fqs=11227
rcu: (t=105003 jiffies g=88877 q=209)
NMI backtrace for cpu 1
CPU: 1 PID: 4301 Comm: syz-fuzzer Not tainted 4.19.0-rc2-next-20180904+ #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_single_cpu_backtrace include/linux/nmi.h:162 [inline]
rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1340
print_cpu_stall.cold.78+0x2fb/0x59c kernel/rcu/tree.c:1478
check_cpu_stall kernel/rcu/tree.c:1550 [inline]
__rcu_pending kernel/rcu/tree.c:3276 [inline]
rcu_pending kernel/rcu/tree.c:3319 [inline]
rcu_check_callbacks+0xd4a/0x15a0 kernel/rcu/tree.c:2665
update_process_times+0x2d/0x70 kernel/time/timer.c:1636
tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164
tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274
__run_hrtimer kernel/time/hrtimer.c:1398 [inline]
__hrtimer_run_queues+0x3eb/0xff0 kernel/time/hrtimer.c:1460
hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1518
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1029 [inline]
smp_apic_timer_interrupt+0x16d/0x6a0 arch/x86/kernel/apic/apic.c:1054
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:867
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:788
[inline]
RIP: 0010:console_unlock+0xc57/0x10d0 kernel/printk/printk.c:2415
Code: c1 e8 03 42 80 3c 30 00 0f 85 40 04 00 00 48 83 3d f5 6c ae 06 00 0f
84 a1 02 00 00 e8 f2 84 19 00 48 8b bd c0 fe ff ff 57 9d <0f> 1f 44 00 00
e9 c3 f5 ff ff e8 da 84 19 00 48 8d 7b 08 48 89 f8
RSP: 0018:ffff8801caf76048 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffff8801cafba640 RBX: 0000000000000200 RCX: 1ffff100395f75ed
RDX: 0000000000000000 RSI: ffffffff8163517e RDI: 0000000000000293
RBP: ffff8801caf761a8 R08: ffff8801cafbae80 R09: 0000000000000006
R10: ffff8801cafba640 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff84214170 R14: dffffc0000000000 R15: 0000000000003301
vprintk_emit+0x33a/0x910 kernel/printk/printk.c:1926
vprintk_default+0x28/0x30 kernel/printk/printk.c:1967
vprintk_func+0x7a/0x117 kernel/printk/printk_safe.c:398
printk+0xa7/0xcf kernel/printk/printk.c:2000
dump_tasks mm/oom_kill.c:420 [inline]
dump_header+0xf0d/0xf70 mm/oom_kill.c:450
oom_kill_process.cold.28+0x10/0x95a mm/oom_kill.c:953
out_of_memory+0xa88/0x1430 mm/oom_kill.c:1120
__alloc_pages_may_oom mm/page_alloc.c:3529 [inline]
__alloc_pages_slowpath+0x223f/0x2cb0 mm/page_alloc.c:4242
__alloc_pages_nodemask+0xa1b/0xd10 mm/page_alloc.c:4397
alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2093
alloc_pages include/linux/gfp.h:509 [inline]
__page_cache_alloc+0x398/0x5e0 mm/filemap.c:946
page_cache_read mm/filemap.c:2385 [inline]
filemap_fault+0x1458/0x2220 mm/filemap.c:2569
ext4_filemap_fault+0x82/0xad fs/ext4/inode.c:6257
__do_fault+0xee/0x450 mm/memory.c:3240
do_read_fault mm/memory.c:3652 [inline]
do_fault mm/memory.c:3752 [inline]
handle_pte_fault mm/memory.c:3983 [inline]
__handle_mm_fault+0x2b4a/0x4350 mm/memory.c:4107
handle_mm_fault+0x53e/0xc80 mm/memory.c:4144
__do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1395
do_page_fault+0xf6/0x7a4 arch/x86/mm/fault.c:1470
page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164
RIP: 0033:0x407e06
Code: cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 83 05 00 00
48 83 ec 58 48 89 6c 24 50 48 8d 6c 24 50 48 8b 54 24 60 <48> 8b 5a 48 48
8b 1b 48 83 fb 30 0f 85 d4 04 00 00 48 8b 5c 24 68
RSP: 002b:000000c4314b7a38 EFLAGS: 00010212
RAX: 0000000000809640 RBX: 000000c4314b7f80 RCX: 000000c420000180
RDX: 0000000000809640 RSI: 000000c4314b7a70 RDI: 000000c4314b7a70
RBP: 000000c4314b7a88 R08: 000000c420019370 R09: 000000c420019578
R10: 0000000000000000 R11: 0000000000000001 R12: 000000c4314b7b90
R13: 000000c4314b7b90 R14: 0000000000000000 R15: 0000000000000000
[ 21570] 0 21570 17617 8745 118784 0 0
syz-executor2
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syz-executor2
[ 21572] 0 21572 17617 8745 118784 0 0
syz-executor2
[ 21573] 0 21573 17617 8745 118784 0 0
syz-executor2
[ 21574] 0 21574 17617 8745 118784 0 0
syz-executor2
[ 21575] 0 21575 17617 8745 118784 0 0
syz-executor2
[ 21576] 0 21576 17617 8745 118784 0 0
syz-executor2
[ 21577] 0 21577 17617 8745 118784 0 0
syz-executor2
[ 21578] 0 21578 17617 8745 118784 0 0
syz-executor2
[ 21579] 0 21579 17617 8745 118784 0 0
syz-executor2
[ 21580] 0 21580 17617 8745 114688 0 0
syz-executor2
[ 21581] 0 21581 17617 8745 118784 0 0
syz-executor2
[ 21582] 0 21582 17617 8745 118784 0 0
syz-executor2
[ 21583] 0 21583 17617 8745 118784 0 0
syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
[ 21587] 0 21587 17617 8745 118784 0 0
syz-executor2
[ 21588] 0 21588 17617 8745 114688 0 0
syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
[ 21601] 0 21601 17617 8745 118784 0 0
syz-executor2
[ 21602] 0 21602 17617 8745 118784 0 0
syz-executor2
[ 21604] 0 21604 17617 8745 118784 0 0
syz-executor2
[ 21605] 0 21605 17617 8745 118784 0 0
syz-executor2
[ 21606] 0 21606 17617 8745 118784 0 0
syz-executor2
[ 21607] 0 21607 17617 8745 118784 0 0
syz-executor2
[ 21608] 0 21608 17617 8745 118784 0 0
syz-executor2
[ 21609] 0 21609 17617 8745 114688 0 0
syz-executor2
[ 21610] 0 21610 17617 8745 118784 0 0
syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
[ 21614] 0 21614 17617 8745 118784 0 0
syz-executor2
[ 21615] 0 21615 17617 8745 118784 0 0
syz-executor2
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syz-executor2
[ 21617] 0 21617 17617 8745 118784 0 0
syz-executor2
[ 21618] 0 21618 17617 8745 118784 0 0
syz-executor2
[ 21619] 0 21619 17617 8745 114688 0 0
syz-executor2
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syz-executor2
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syz-executor2
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syz-executor2
[ 21623] 0 21623 17617 8745 118784 0 0
syz-executor2
[ 21624] 0 21624 17617 8745 118784 0 0
syz-executor2
[ 21625] 0 21625 17617 8745 118784 0 0
syz-executor2
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syz-executor2
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syz-executor2
[ 21628] 0 21628 17617 8745 118784 0 0
syz-executor2
[ 21629] 0 21629 17617 8745 118784 0 0
syz-executor2
[ 21630] 0 21630 17617 8745 118784 0 0
syz-executor2
[ 21631] 0 21631 17617 8745 118784 0 0
syz-executor2
[ 21632] 0 21632 17617 8745 118784 0 0
syz-executor2
[ 21633] 0 21633 17617 8745 118784 0 0
syz-executor2
[ 21634] 0 21634 17617 8745 118784 0 0
syz-executor2
[ 21635] 0 21635 17617 8745 118784 0 0
syz-executor2
[ 21636] 0 21636 17617 8745 118784 0 0
syz-executor2
[ 21637] 0 21637 17617 8745 118784 0 0
syz-executor2
[ 21638] 0 21638 17617 8745 118784 0 0
syz-executor2
[ 21639] 0 21639 17617 8745 118784 0 0
syz-executor2
[ 21640] 0 21640 17617 8745 118784 0 0
syz-executor2
[ 21641] 0 21641 17617 8745 118784 0 0
syz-executor2
[ 21642] 0 21642 17617 8745 118784 0 0
syz-executor2
[ 21643] 0 21643 17617 8745 118784 0 0
syz-executor2
[ 21644] 0 21644 17617 8745 118784 0 0
syz-executor2
[ 21645] 0 21645 17617 8745 118784 0 0
syz-executor2
[ 21646] 0 21646 17617 8745 118784 0 0
syz-executor2
[ 21647] 0 21647 17617 8745 114688 0 0
syz-executor2
[ 21648] 0 21648 17617 8745 118784 0 0
syz-executor2
[ 21649] 0 21649 17617 8745 118784 0 0
syz-executor2
[ 21650] 0 21650 17617 8745 118784 0 0
syz-executor2
[ 21651] 0 21651 17617 8745 118784 0 0
syz-executor2
[ 21652] 0 21652 17617 8745 118784 0 0
syz-executor2
[ 21653] 0 21653 17617 8745 118784 0 0
syz-executor2
[ 21654] 0 21654 17617 8745 118784 0 0
syz-executor2
[ 21655] 0 21655 17617 8745 118784 0 0
syz-executor2
[ 21656] 0 21656 17617 8745 118784 0 0
syz-executor2
[ 21657] 0 21657 17617 8745 118784 0 0
syz-executor2
[ 21658] 0 21658 17617 8745 118784 0 0
syz-executor2
[ 21659] 0 21659 17617 8745 118784 0 0
syz-executor2
[ 21660] 0 21660 17617 8745 118784 0 0
syz-executor2
[ 21661] 0 21661 17617 8745 118784 0 0
syz-executor2
[ 21662] 0 21662 17617 8745 118784 0 0
syz-executor2
[ 21663] 0 21663 17617 8745 114688 0 0
syz-executor2
[ 21664] 0 21664 17617 8745 118784 0 0
syz-executor2
[ 21665] 0 21665 17617 8745 118784 0 0
syz-executor2
[ 21666] 0 21666 17617 8745 118784 0 0
syz-executor2
[ 21667] 0 21667 17617 8745 118784 0 0
syz-executor2
[ 21668] 0 21668 17617 8745 118784 0 0
syz-executor2
[ 21669] 0 21669 17617 8745 118784 0 0
syz-executor2
[ 21670] 0 21670 17617 8745 118784 0 0
syz-executor2
[ 21671] 0 21671 17617 8745 118784 0 0
syz-executor2
[ 21672] 0 21672 17617 8745 118784 0 0
syz-executor2
[ 21673] 0 21673 17617 8745 118784 0 0
syz-executor2
[ 21674] 0 21674 17617 8745 118784 0 0
syz-executor2
[ 21675] 0 21675 17617 8745 118784 0 0
syz-executor2
[ 21676] 0 21676 17617 8745 118784 0 0
syz-executor2
INFO: task syz-executor2:11165 blocked for more than 140 seconds.
[ 21677] 0 21677 17617 8745 118784 0 0
syz-executor2
[ 21678] 0 21678 17617 8745 114688 0 0
syz-executor2
[ 21679] 0 21679 17617 8745 114688 0 0
syz-executor2
[ 21680] 0 21680 17617 8745 118784 0 0
syz-executor2
[ 21681] 0 21681 17617 8745 118784 0 0
syz-executor2
[ 21682] 0 21682 17617 8745 118784 0 0
syz-executor2
[ 21683] 0 21683 17617 8745 118784 0 0
syz-executor2
[ 21684] 0 21684 17617 8745 118784 0 0
syz-executor2
[ 21685] 0 21685 17617 8745 118784 0 0
syz-executor2
[ 21686] 0 21686 17617 8745 118784 0 0
syz-executor2
[ 21687] 0 21687 17617 8745 118784 0 0
syz-executor2
[ 21688] 0 21688 17617 8745 118784 0 0
syz-executor2
[ 21689] 0 21689 17617 8745 118784 0 0
syz-executor2
[ 21690] 0 21690 17617 8745 118784 0 0
syz-executor2
[ 21691] 0 21691 17617 8745 118784 0 0
syz-executor2
[ 21692] 0 21692 17617 8745 118784 0 0
syz-executor2
[ 21693] 0 21693 17617 8745 118784 0 0
syz-executor2
[ 21694] 0 21694 17617 8745 114688 0 0
syz-executor2
[ 21695] 0 21695 17617 8745 118784 0 0
syz-executor2
[ 21696] 0 21696 17617 8745 118784 0 0
syz-executor2
[ 21697] 0 21697 17617 8745 118784 0 0
syz-executor2
[ 21698] 0 21698 17617 8745 118784 0 0
syz-executor2
[ 21699] 0 21699 17617 8745 118784 0 0
syz-executor2
[ 21700] 0 21700 17617 8745 118784 0 0
syz-executor2
[ 21701] 0 21701 17617 8745 118784 0 0
syz-executor2
[ 19683] 0 19683 17617 8745 118784 0 0
syz-executor2
[ 21702] 0 21702 17617 8745 118784 0 0
syz-executor2
[ 21703] 0 21703 17617 8745 118784 0 0
syz-executor2
[ 21704] 0 21704 17617 8745 118784 0 0
syz-executor2
[ 21705] 0 21705 17617 8745 118784 0 0
syz-executor2
[ 21706] 0 21706 17617 8745 114688 0 0
syz-executor2
[ 21707] 0 21707 17617 8745 118784 0 0
syz-executor2
[ 21708] 0 21708 17617 8745 118784 0 0
syz-executor2
[ 21709] 0 21709 17617 8745 118784 0 0
syz-executor2
[ 21710] 0 21710 17617 8745 118784 0 0
syz-executor2
[ 21711] 0 21711 17617 8745 118784 0 0
syz-executor2
[ 21712] 0 21712 17617 8745 118784 0 0
syz-executor2
[ 21713] 0 21713 17617 8745 118784 0 0
syz-executor2
[ 21714] 0 21714 17617 8745 118784 0 0
syz-executor2
[ 21715] 0 21715 17617 8745 118784 0 0
syz-executor2
[ 21716] 0 21716 17617 8745 118784 0 0
syz-executor2
[ 21717] 0 21717 17617 8745 118784 0 0
syz-executor2
[ 21718] 0 21718 17617 8745 114688 0 0
syz-executor2
[ 21719] 0 21719 17617 8745 114688 0 0
syz-executor2
[ 21720] 0 21720 17617 8745 118784 0 0
syz-executor2
[ 21721] 0 21721 17617 8745 118784 0 0
syz-executor2
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 21723] 0 21723 17617 8745 118784 0 0
syz-executor2
syz-executor2 D16520 11165 11010 0x00000000
[ 21724] 0 21724 17617 8745 114688 0 0
syz-executor2
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
[ 21725] 0 21725 17617 8745 118784 0 0
syz-executor2
[ 21726] 0 21726 17617 8745 114688 0 0
syz-executor2
[ 21727] 0 21727 17617 8745 118784 0 0
syz-executor2
[ 21728] 0 21728 17617 8745 118784 0 0
syz-executor2
[ 21729] 0 21729 17617 8745 118784 0 0
syz-executor2
[ 21730] 0 21730 17617 8745 118784 0 0
syz-executor2
schedule+0xfb/0x450 kernel/sched/core.c:3517
[ 21731] 0 21731 17617 8745 118784 0 0
syz-executor2
[ 21732] 0 21732 17617 8745 114688 0 0
syz-executor2
[ 21733] 0 21733 17617 8745 118784 0 0
syz-executor2
[ 21734] 0 21734 17617 8745 118784 0 0
syz-executor2
[ 19716] 0 19716 17617 8745 118784 0 0
syz-executor2
[ 21735] 0 21735 17617 8745 118784 0 0
syz-executor2
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
[ 21736] 0 21736 17617 8745 118784 0 0
syz-executor2
[ 21737] 0 21737 17617 8745 118784 0 0
syz-executor2
[ 21738] 0 21738 17617 8745 118784 0 0
syz-executor2
[ 21739] 0 21739 17617 8745 118784 0 0
syz-executor2
[ 21740] 0 21740 17617 8745 118784 0 0
syz-executor2
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
[ 21741] 0 21741 17617 8745 118784 0 0
syz-executor2
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
down_read+0xc3/0x1d0 kernel/locking/rwsem.c:26
[ 21742] 0 21742 17617 8745 118784 0 0
syz-executor2
[ 21743] 0 21743 17617 8745 118784 0 0
syz-executor2
[ 21744] 0 21744 17617 8745 118784 0 0
syz-executor2
i_mmap_lock_read include/linux/fs.h:500 [inline]
rmap_walk_file+0x7db/0xea0 mm/rmap.c:1876
[ 21745] 0 21745 17617 8745 118784 0 0
syz-executor2
[ 21746] 0 21746 17617 8745 118784 0 0
syz-executor2
[ 21747] 0 21747 17617 8745 114688 0 0
syz-executor2
[ 21748] 0 21748 17617 8745 118784 0 0
syz-executor2
[ 21749] 0 21749 17617 8745 118784 0 0
syz-executor2
[ 21750] 0 21750 17617 8745 118784 0 0
syz-executor2
[ 21751] 0 21751 17617 8745 118784 0 0
syz-executor2
[ 21752] 0 21752 17617 8745 118784 0 0
syz-executor2
[ 21753] 0 21753 17617 8745 118784 0 0
syz-executor2
rmap_walk+0x244/0x370 mm/rmap.c:1904
[ 21754] 0 21754 17617 8745 118784 0 0
syz-executor2
[ 21755] 0 21755 17617 8745 118784 0 0
syz-executor2
[ 21756] 0 21756 17617 8745 114688 0 0
syz-executor2
[ 21757] 0 21757 17617 8745 118784 0 0
syz-executor2
[ 21758] 0 21758 17617 8745 118784 0 0
syz-executor2
page_referenced+0x88c/0xae0 mm/rmap.c:874
[ 21759] 0 21759 17617 8745 118784 0 0
syz-executor2
[ 21760] 0 21760 17617 8745 114688 0 0
syz-executor2
[ 21761] 0 21761 17617 8745 114688 0 0
syz-executor2
[ 21762] 0 21762 17617 8745 118784 0 0
syz-executor2
[ 21763] 0 21763 17617 8745 114688 0 0
syz-executor2
[ 21764] 0 21764 17617 8745 118784 0 0
syz-executor2
[ 21765] 0 21765 17617 8745 118784 0 0
syz-executor2
shrink_active_list+0x88a/0x17b0 mm/vmscan.c:2119
[ 21766] 0 21766 17617 8745 118784 0 0
syz-executor2
[ 19745] 0 19745 17617 8745 118784 0 0
syz-executor2
[ 21767] 0 21767 17617 8745 114688 0 0
syz-executor2
[ 21768] 0 21768 17617 8745 118784 0 0
syz-executor2
[ 21769] 0 21769 17617 8745 118784 0 0
syz-executor2
[ 21770] 0 21770 17617 8745 118784 0 0
syz-executor2
[ 21771] 0 21771 17617 8745 118784 0 0
syz-executor2
[ 21772] 0 21772 17617 8745 118784 0 0
syz-executor2
[ 21773] 0 21773 17617 8745 118784 0 0
syz-executor2
[ 21774] 0 21774 17617 8745 118784 0 0
syz-executor2
[ 21775] 0 21775 17617 8745 118784 0 0
syz-executor2
[ 21776] 0 21776 17617 8745 118784 0 0
syz-executor2
[ 21777] 0 21777 17617 8745 118784 0 0
syz-executor2
shrink_list mm/vmscan.c:2250 [inline]
shrink_node_memcg+0x803/0x18f0 mm/vmscan.c:2517
[ 19752] 0 19752 17617 8745 118784 0 0
syz-executor2
[ 21778] 0 21778 17617 8745 118784 0 0
syz-executor2
[ 21779] 0 21779 17617 8745 118784 0 0
syz-executor2
[ 21781] 0 21781 17617 8745 118784 0 0
syz-executor2
shrink_node+0x3b9/0x16a0 mm/vmscan.c:2732
[ 21782] 0 21782 17617 8745 118784 0 0
syz-executor2
[ 21783] 0 21783 17617 8745 118784 0 0
syz-executor2
[ 21784] 0 21784 17617 8745 118784 0 0
syz-executor2
[ 21785] 0 21785 17617 8745 118784 0 0
syz-executor2
[ 21786] 0 21786 17617 8745 118784 0 0
syz-executor2
[ 21787] 0 21787 17617 8745 118784 0 0
syz-executor2
[ 21788] 0 21788 17617 8745 118784 0 0
syz-executor2
[ 21789] 0 21789 17617 8745 118784 0 0
syz-executor2
shrink_zones mm/vmscan.c:2964 [inline]
do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3026
[ 21790] 0 21790 17617 8745 118784 0 0
syz-executor2
[ 21791] 0 21791 17617 8745 114688 0 0
syz-executor2
[ 21792] 0 21792 17617 8745 118784 0 0
syz-executor2
try_to_free_pages+0x4b2/0xa60 mm/vmscan.c:3241
[ 21793] 0 21793 17617 8745 118784 0 0
syz-executor2
[ 21794] 0 21794 17617 8745 118784 0 0
syz-executor2
[ 21795] 0 21795 17617 8745 118784 0 0
syz-executor2
[ 21796] 0 21796 17617 8745 118784 0 0
syz-executor2
[ 21797] 0 21797 17617 8745 118784 0 0
syz-executor2
[ 21798] 0 21798 17617 8745 118784 0 0
syz-executor2
[ 21799] 0 21799 17617 8745 118784 0 0
syz-executor2
__perform_reclaim mm/page_alloc.c:3776 [inline]
__alloc_pages_direct_reclaim mm/page_alloc.c:3797 [inline]
__alloc_pages_slowpath+0x95a/0x2cb0 mm/page_alloc.c:4198
[ 21800] 0 21800 17617 8745 118784 0 0
syz-executor2
[ 21801] 0 21801 17617 8745 118784 0 0
syz-executor2
[ 21802] 0 21802 17617 8745 114688 0 0
syz-executor2
[ 21803] 0 21803 17617 8745 118784 0 0
syz-executor2
[ 21804] 0 21804 17617 8745 118784 0 0
syz-executor2
[ 21805] 0 21805 17617 8745 118784 0 0
syz-executor2
[ 21806] 0 21806 17617 8745 118784 0 0
syz-executor2
[ 21807] 0 21807 17617 8745 118784 0 0
syz-executor2
[ 21808] 0 21808 17617 8745 118784 0 0
syz-executor2
[ 21810] 0 21810 17617 8745 114688 0 0
syz-executor2
[ 21811] 0 21811 17617 8745 118784 0 0
syz-executor2
[ 21812] 0 21812 17617 8745 118784 0 0
syz-executor2
[ 21813] 0 21813 17617 8745 118784 0 0
syz-executor2
[ 21814] 0 21814 17617 8745 118784 0 0
syz-executor2
[ 21815] 0 21815 17617 8745 118784 0 0
syz-executor2
[ 21816] 0 21816 17617 8745 118784 0 0
syz-executor2
__alloc_pages_nodemask+0xa1b/0xd10 mm/page_alloc.c:4397
[ 21817] 0 21817 17617 8745 118784 0 0
syz-executor2
[ 21818] 0 21818 17617 8745 118784 0 0
syz-executor2
[ 21819] 0 21819 17617 8745 114688 0 0
syz-executor2
[ 21820] 0 21820 17617 8745 118784 0 0
syz-executor2
[ 21821] 0 21821 17617 8745 118784 0 0
syz-executor2
[ 21822] 0 21822 17617 8745 118784 0 0
syz-executor2
[ 21823] 0 21823 17617 8745 118784 0 0
syz-executor2
[ 21824] 0 21824 17617 8745 114688 0 0
syz-executor2
__alloc_pages include/linux/gfp.h:473 [inline]
__alloc_pages_node include/linux/gfp.h:486 [inline]
kmem_getpages mm/slab.c:1409 [inline]
cache_grow_begin+0x91/0x710 mm/slab.c:2677
[ 21825] 0 21825 17617 8745 118784 0 0
syz-executor2
[ 21826] 0 21826 17617 8745 118784 0 0
syz-executor2
fallback_alloc+0x203/0x2c0 mm/slab.c:3219
[ 21827] 0 21827 17617 8745 118784 0 0
syz-executor2
____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287
[ 21828] 0 21828 17617 8745 114688 0 0
syz-executor2
__do_cache_alloc mm/slab.c:3356 [inline]
slab_alloc mm/slab.c:3384 [inline]
kmem_cache_alloc+0x1e5/0x710 mm/slab.c:3552
[ 21829] 0 21829 17617 8745 118784 0 0
syz-executor2
vm_area_dup+0x7a/0x220 kernel/fork.c:324
[ 21830] 0 21830 17617 8745 118784 0 0
syz-executor2
[ 21831] 0 21831 17617 8745 118784 0 0
syz-executor2
dup_mmap kernel/fork.c:485 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x3a48/0x7af0 kernel/fork.c:1870
[ 21832] 0 21832 17617 8745 118784 0 0
syz-executor2
[ 21833] 0 21833 17617 8745 118784 0 0
syz-executor2
[ 21834] 0 21834 17617 8745 118784 0 0
syz-executor2
[ 21835] 0 21835 17617 8745 118784 0 0
syz-executor2
[ 21836] 0 21836 17617 8745 118784 0 0
syz-executor2
[ 21837] 0 21837 17617 8745 118784 0 0
syz-executor2
[ 21838] 0 21838 17617 8745 118784 0 0
syz-executor2
[ 21839] 0 21839 17617 8745 118784 0 0
syz-executor2
[ 21840] 0 21840 17617 8745 118784 0 0
syz-executor2
[ 21841] 0 21841 17617 8745 114688 0 0
syz-executor2
[ 21842] 0 21842 17617 8745 118784 0 0
syz-executor2
[ 21843] 0 21843 17617 8745 118784 0 0
syz-executor2
[ 21844] 0 21844 17617 8745 118784 0 0
syz-executor2
[ 21845] 0 21845 17617 8745 118784 0 0
syz-executor2
[ 21846] 0 21846 17617 8745 118784 0 0
syz-executor2
[ 21847] 0 21847 17617 8745 118784 0 0
syz-executor2
[ 21848] 0 21848 17617 8745 118784 0 0
syz-executor2
[ 21849] 0 21849 17617 8745 118784 0 0
syz-executor2
[ 21850] 0 21850 17617 8745 118784 0 0
syz-executor2
[ 21851] 0 21851 17617 8745 118784 0 0
syz-executor2
[ 21852] 0 21852 17617 8745 118784 0 0
syz-executor2
[ 21853] 0 21853 17617 8745 118784 0 0
syz-executor2
[ 21854] 0 21854 17617 8745 118784 0 0
syz-executor2
[ 21855] 0 21855 17617 8745 114688 0 0
syz-executor2
[ 21856] 0 21856 17617 8745 118784 0 0
syz-executor2
[ 21857] 0 21857 17617 8745 118784 0 0
syz-executor2
[ 21858] 0 21858 17617 8745 118784 0 0
syz-executor2
[ 21859] 0 21859 17617 8745 114688 0 0
syz-executor2
[ 21860] 0 21860 17617 8745 118784 0 0
syz-executor2
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
[ 21861] 0 21861 17617 8745 118784 0 0
syz-executor2
[ 21862] 0 21862 17617 8745 118784 0 0
syz-executor2
[ 21863] 0 21863 17617 8745 118784 0 0
syz-executor2
[ 21864] 0 21864 17617 8745 118784 0 0
syz-executor2
[ 21865] 0 21865 17617 8745 118784 0 0
syz-executor2
[ 21866] 0 21866 17617 8745 118784 0 0
syz-executor2
[ 21867] 0 21867 17617 8745 118784 0 0
syz-executor2
[ 21868] 0 21868 17617 8745 118784 0 0
syz-executor2
[ 21869] 0 21869 17617 8745 118784 0 0
syz-executor2
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
[ 21870] 0 21870 17617 8745 118784 0 0
syz-executor2
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
[ 21871] 0 21871 17617 8745 118784 0 0
syz-executor2
[ 21872] 0 21872 17617 8745 118784 0 0
syz-executor2
[ 21873] 0 21873 17617 8745 114688 0 0
syz-executor2
[ 21874] 0 21874 17617 8745 118784 0 0
syz-executor2
[ 21875] 0 21875 17617 8745 118784 0 0
syz-executor2
entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 21876] 0 21876 17617 8745 118784 0 0
syz-executor2
RIP: 0033:0x457099
Code: 48 8b 54 24 38 48 8b 7c 24 48 eb 8d 48 8b 6c 24 50 48 83 c4 58 c3 48
89 04 24 48 89 5c 24 08 e8 fd a8 fb ff 48 8b 44 24 40 48 <8b> 4c 24 48 48
8b 54 24 38 4c 8b 54 24 18 e9 ee fe ff ff 48 89 74
[ 21877] 0 21877 17617 8745 118784 0 0
syz-executor2
RSP: 002b:00007f98a3edbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
[ 21878] 0 21878 17617 8745 118784 0 0
syz-executor2
RAX: ffffffffffffffda RBX: 00007f98a3edc6d4 RCX: 0000000000457099
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0002000000000000
[ 21879] 0 21879 17617 8745 118784 0 0
syz-executor2
RBP: 00000000009300a0 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff
[ 21880] 0 21880 17617 8745 118784 0 0
syz-executor2
R13: 00000000004cbae8 R14: 00000000004c33c7 R15: 0000000000000000
INFO: task syz-executor2:11249 blocked for more than 140 seconds.
[ 21881] 0 21881 17617 8745 118784 0 0
syz-executor2
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 21882] 0 21882 17617 8745 118784 0 0
syz-executor2
syz-executor2 D23064 11249 10868 0x00000000
[ 21883] 0 21883 17617 8745 118784 0 0
syz-executor2
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
[ 21884] 0 21884 17617 8745 118784 0 0
syz-executor2
[ 21885] 0 21885 17617 8745 118784 0 0
syz-executor2
[ 21886] 0 21886 17617 8745 118784 0 0
syz-executor2
[ 21887] 0 21887 17617 8745 114688 0 0
syz-executor2
[ 21888] 0 21888 17617 8745 118784 0 0
syz-executor2
[ 21889] 0 21889 17617 8745 118784 0 0
syz-executor2
schedule+0xfb/0x450 kernel/sched/core.c:3517
[ 21890] 0 21890 17617 8745 114688 0 0
syz-executor2
[ 21891] 0 21891 17617 8745 114688 0 0
syz-executor2
[ 21892] 0 21892 17617 8745 114688 0 0
syz-executor2
[ 21893] 0 21893 17617 8745 118784 0 0
syz-executor2
[ 21894] 0 21894 17617 8745 114688 0 0
syz-executor2
[ 21895] 0 21895 17617 8745 118784 0 0
syz-executor2
[ 21896] 0 21896 17617 8745 118784 0 0
syz-executor2
__rwsem_down_write_failed_common+0x98b/0x1650
kernel/locking/rwsem-xadd.c:566
[ 21897] 0 21897 17617 8745 118784 0 0
syz-executor2
[ 21898] 0 21898 17617 8745 118784 0 0
syz-executor2
[ 21899] 0 21899 17617 8745 118784 0 0
syz-executor2
[ 21900] 0 21900 17617 8745 118784 0 0
syz-executor2
[ 21901] 0 21901 17617 8745 114688 0 0
syz-executor2
[ 21902] 0 21902 17617 8745 118784 0 0
syz-executor2
[ 21903] 0 21903 17617 8745 118784 0 0
syz-executor2
[ 21904] 0 21904 17617 8745 118784 0 0
syz-executor2
[ 21905] 0 21905 17617 8745 118784 0 0
syz-executor2
[ 21906] 0 21906 17617 8745 118784 0 0
syz-executor2
[ 21907] 0 21907 17617 8745 114688 0 0
syz-executor2
[ 21908] 0 21908 17617 8745 114688 0 0
syz-executor2
[ 21909] 0 21909 17617 8745 118784 0 0
syz-executor2
[ 21910] 0 21910 17617 8745 118784 0 0
syz-executor2
[ 21911] 0 21911 17617 8745 118784 0 0
syz-executor2
[ 21912] 0 21912 17617 8745 118784 0 0
syz-executor2
[ 21913] 0 21913 17617 8745 114688 0 0
syz-executor2
[ 21914] 0 21914 17617 8745 118784 0 0
syz-executor2
[ 21915] 0 21915 17617 8745 118784 0 0
syz-executor2
[ 21916] 0 21916 17617 8745 118784 0 0
syz-executor2
rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
[ 21918] 0 21918 17617 8745 118784 0 0
syz-executor2
call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
[ 21919] 0 21919 17617 8745 118784 0 0
syz-executor2
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0xaa/0x130 kernel/locking/rwsem.c:72
[ 21920] 0 21920 17617 8745 118784 0 0
syz-executor2
[ 21921] 0 21921 17617 8745 118784 0 0
syz-executor2
[ 21922] 0 21922 17617 8745 114688 0 0
syz-executor2
i_mmap_lock_write include/linux/fs.h:490 [inline]
dup_mmap kernel/fork.c:512 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x3ca3/0x7af0 kernel/fork.c:1870
[ 21923] 0 21923 17617 8745 118784 0 0
syz-executor2
[ 21924] 0 21924 17617 8745 118784 0 0
syz-executor2
[ 21925] 0 21925 17617 8745 118784 0 0
syz-executor2
[ 21926] 0 21926 17617 8745 114688 0 0
syz-executor2
[ 21927] 0 21927 1761
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
syzbot
Sep 8, 2018, 10:03:21 AM9/8/18
to Tetsuo Handa, penguin...@i-love.sakura.ne.jp, syzkaller-upst...@googlegroups.com
> #syz dup: INFO: task hung in ext4_da_get_block_prep
Your 'dup:' command is accepted, but please keep
syzkaller-upst...@googlegroups.com mailing list in CC next
time. It serves as a history of what happened with each bug report. Thank
you.
Your 'dup:' command is accepted, but please keep
syzkaller-upst...@googlegroups.com mailing list in CC next
time. It serves as a history of what happened with each bug report. Thank
you.
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