INFO: task hung in __down
13 views
Skip to first unread message
syzbot
Apr 12, 2019, 8:00:48 PM4/12/19
to syzkaller-a...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 9731a2da UPSTREAM: f2fs: clear PageError on writepage - pa..
git tree: android-4.9
console output: https://syzkaller.appspot.com/x/log.txt?x=119b5c37800000
kernel config: https://syzkaller.appspot.com/x/.config?x=499a13c4e119010c
dashboard link: https://syzkaller.appspot.com/bug?extid=cc4775bb6257839f6d72
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=137a7237800000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13be5de7800000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+cc4775...@syzkaller.appspotmail.com
Free swap = 0kB
Total swap = 0kB
1965969 pages RAM
0 pages HighMem/MovableOnly
321064 pages reserved
INFO: task init:4044 blocked for more than 120 seconds.
Not tainted 4.9.98-g9731a2d #22
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init D
29000 4044 1 0x00000000
ffff8801d48b9500 ffff8801d48b8540 ffff8801d4fb4800 ffff8801db221b98
ffff8801d5da7570 ffffffff839e377d 0000000000000000 ffff8801d4fb08ea
ffff8801d5da76d0 0000000000000046 ffff8801db222468Call Trace:
[<ffffffff839e4d7f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3557
[<ffffffff839f1191>] schedule_timeout+0x861/0xf70 kernel/time/timer.c:1768
[<ffffffff839ed8ae>] __down_common kernel/locking/semaphore.c:221 [inline]
[<ffffffff839ed8ae>] __down+0x12e/0x1f0 kernel/locking/semaphore.c:238
[<ffffffff81229f1e>] down+0x5e/0x80 kernel/locking/semaphore.c:61
[<ffffffff812587dc>] console_lock+0x2c/0x80 kernel/printk/printk.c:2212
[<ffffffff8125e04c>] console_device+0x1c/0xc0 kernel/printk/printk.c:2549
[<ffffffff82116f6a>] tty_lookup_driver drivers/tty/tty_io.c:2003 [inline]
[<ffffffff82116f6a>] tty_open_by_driver drivers/tty/tty_io.c:2048 [inline]
[<ffffffff82116f6a>] tty_open+0x71a/0xe20 drivers/tty/tty_io.c:2125
[<ffffffff8157c55d>] chrdev_open+0x22d/0x4c0 fs/char_dev.c:392
[<ffffffff81567443>] do_dentry_open+0x703/0xc80 fs/open.c:766
[<ffffffff8156ac2c>] vfs_open+0x11c/0x210 fs/open.c:879
[<ffffffff815a1d68>] do_last fs/namei.c:3410 [inline]
[<ffffffff815a1d68>] path_openat+0x758/0x3590 fs/namei.c:3534
[<ffffffff815a8e67>] do_filp_open+0x197/0x270 fs/namei.c:3568
[<ffffffff8156b63d>] do_sys_open+0x30d/0x5c0 fs/open.c:1072
[<ffffffff8156b91d>] SYSC_open fs/open.c:1090 [inline]
[<ffffffff8156b91d>] SyS_open+0x2d/0x40 fs/open.c:1085
[<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
[<ffffffff839f4653>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Showing all locks held in the system:
2 locks held by khungtaskd/519:
#0:
(rcu_read_lock){......}, at: [<ffffffff813646ec>]
check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
(rcu_read_lock){......}, at: [<ffffffff813646ec>] watchdog+0x11c/0xa20
kernel/hung_task.c:239
(tasklist_lock){.+.+..}, at: [<ffffffff81423ba0>]
debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
#0:
(&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d565c>] __fdget_pos+0xac/0xd0
fs/file.c:781
#0:
(&tty->ldisc_sem){++++++}, at: [<ffffffff839f2822>]
ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
(&ldata->atomic_read_lock){+.+...}, at: [<ffffffff8211cc12>]
n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2133
#0:
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open_by_driver
drivers/tty/tty_io.c:2047 [inline]
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open+0x46c/0xe20
drivers/tty/tty_io.c:2125
#0:
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open_by_driver
drivers/tty/tty_io.c:2047 [inline]
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open+0x46c/0xe20
drivers/tty/tty_io.c:2125
#0:
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open_by_driver
drivers/tty/tty_io.c:2047 [inline]
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open+0x46c/0xe20
drivers/tty/tty_io.c:2125
#0:
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open_by_driver
drivers/tty/tty_io.c:2047 [inline]
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open+0x46c/0xe20
drivers/tty/tty_io.c:2125
#0:
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open_by_driver
drivers/tty/tty_io.c:2047 [inline]
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open+0x46c/0xe20
drivers/tty/tty_io.c:2125
#0:
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open_by_driver
drivers/tty/tty_io.c:2047 [inline]
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open+0x46c/0xe20
drivers/tty/tty_io.c:2125
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.98-g9731a2d #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
ffff8801d8b17d08
ffffffff81eb0ee9 0000000000000000 0000000000000001 0000000000000001
0000000000000001 ffffffff810b7da0 ffff8801d8b17d40 ffffffff81ebc1e7
0000000000000001 0000000000000000 0000000000000003Call Trace:
[<ffffffff81eb0ee9>] __dump_stack lib/dump_stack.c:15 [inline]
[<ffffffff81eb0ee9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
[<ffffffff81ebc1e7>] nmi_cpu_backtrace.cold.2+0x48/0x87
lib/nmi_backtrace.c:99
[<ffffffff81ebc17a>] nmi_trigger_cpumask_backtrace+0x12a/0x14f
lib/nmi_backtrace.c:60
[<ffffffff810b7ea4>] arch_trigger_cpumask_backtrace+0x14/0x20
arch/x86/kernel/apic/hw_nmi.c:37
[<ffffffff81364c84>] trigger_all_cpu_backtrace include/linux/nmi.h:58
[inline]
[<ffffffff81364c84>] check_hung_task kernel/hung_task.c:125 [inline]
[<ffffffff81364c84>] check_hung_uninterruptible_tasks
kernel/hung_task.c:182 [inline]
[<ffffffff81364c84>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
[<ffffffff8119ad5d>] kthread+0x26d/0x300 kernel/kthread.c:211
[<ffffffff839f481c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6908 Comm: syz-executor376 Not tainted 4.9.98-g9731a2d #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
task: ffff8801cde1c800 task.stack: ffff8801c0950000
RIP: 0010:[<ffffffff81ee4fa9>] c [<ffffffff81ee4fa9>] memset_erms+0x9/0x10
arch/x86/lib/memset_64.S:64
RSP: 0018:ffff8801c09576f8 EFLAGS: 00010206
RAX: dffffc00000000ff RBX: 00000000001bcc00 RCX: 000000000001c880
RDX: 0000000000040000 RSI: 00000000000000ff RDI: ffffed00379a3780
RBP: ffff8801c0957700 R08: 1ffff10037980000 R09: ffffed0037980000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000009
R13: ffff8801bcc00000 R14: 0000000000000000 R15: ffffea0006f30000
FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020200000 CR3: 000000000461e000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
ffffffff815388c9 c ffff8801c0957790 c ffffffff8144825c c 0000000000000046 c
0000000000000000 c ffff8801cde1d0c0 c ffff8801cde1d0c0 c ffff8801cde1c800 c
ffffffff839f3d7a c 0000000000000286 c 0000000000000000 c ffff8801c0957c48 c
Call Trace:
[<ffffffff8144825c>] free_pages_prepare mm/page_alloc.c:1067 [inline]
[<ffffffff8144825c>] __free_pages_ok+0x1ec/0x1610 mm/page_alloc.c:1263
[<ffffffff814496de>] free_compound_page+0x5e/0x70 mm/page_alloc.c:594
[<ffffffff8154f409>] free_transhuge_page+0x99/0xc0 mm/huge_memory.c:2228
[<ffffffff81461a40>] __put_compound_page+0x80/0xc0 mm/swap.c:94
[<ffffffff81463634>] release_pages+0x2f4/0x970 mm/swap.c:763
[<ffffffff81506437>] free_pages_and_swap_cache+0x117/0x160
mm/swap_state.c:273
[<ffffffff814bdbf4>] tlb_flush_mmu_free+0xb4/0x150 mm/memory.c:259
[<ffffffff814c146d>] tlb_flush_mmu+0x1d/0x20 mm/memory.c:268
[<ffffffff81546ce4>] tlb_remove_page_size include/asm-generic/tlb.h:154
[inline]
[<ffffffff81546ce4>] tlb_remove_page include/asm-generic/tlb.h:172 [inline]
[<ffffffff81546ce4>] zap_huge_pmd+0x404/0x860 mm/huge_memory.c:1424
[<ffffffff814c628f>] zap_pmd_range mm/memory.c:1245 [inline]
[<ffffffff814c628f>] zap_pud_range mm/memory.c:1279 [inline]
[<ffffffff814c628f>] unmap_page_range+0x12af/0x1730 mm/memory.c:1300
[<ffffffff814c6811>] unmap_single_vma+0x101/0x260 mm/memory.c:1345
[<ffffffff814c7152>] unmap_vmas+0x102/0x1d0 mm/memory.c:1375
[<ffffffff814df8b4>] exit_mmap+0x214/0x3f0 mm/mmap.c:2988
[<ffffffff81129dd3>] __mmput kernel/fork.c:878 [inline]
[<ffffffff81129dd3>] mmput+0xf3/0x2d0 kernel/fork.c:900
[<ffffffff8113ebb6>] exit_mm kernel/exit.c:518 [inline]
[<ffffffff8113ebb6>] do_exit+0x906/0x27c0 kernel/exit.c:824
[<ffffffff81144d91>] do_group_exit+0x111/0x340 kernel/exit.c:941
[<ffffffff81144fdd>] SYSC_exit_group kernel/exit.c:952 [inline]
[<ffffffff81144fdd>] SyS_exit_group+0x1d/0x20 kernel/exit.c:950
[<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
[<ffffffff839f4653>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: c48 cc1 ce9 c03 c40 c0f cb6 cf6 c48 cb8 c01 c01 c01 c01
c01 c01 c01 c01 c48 c0f caf cc6 cf3 c48 cab c89 cd1 cf3 caa
c4c c89 cc8 cc3 c90 c49 c89 cf9 c40 c88 cf0 c48 c89 cd1
c<f3> caa c4c c89 cc8 cc3 c90 c49 c89 cfa c40 c0f cb6 cce
c48 cb8 c01 c01 c01 c01 c01 c
---
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#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
syzbot found the following crash on:
HEAD commit: 9731a2da UPSTREAM: f2fs: clear PageError on writepage - pa..
git tree: android-4.9
console output: https://syzkaller.appspot.com/x/log.txt?x=119b5c37800000
kernel config: https://syzkaller.appspot.com/x/.config?x=499a13c4e119010c
dashboard link: https://syzkaller.appspot.com/bug?extid=cc4775bb6257839f6d72
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=137a7237800000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13be5de7800000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+cc4775...@syzkaller.appspotmail.com
Free swap = 0kB
Total swap = 0kB
1965969 pages RAM
0 pages HighMem/MovableOnly
321064 pages reserved
INFO: task init:4044 blocked for more than 120 seconds.
Not tainted 4.9.98-g9731a2d #22
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init D
29000 4044 1 0x00000000
ffff8801d48b9500 ffff8801d48b8540 ffff8801d4fb4800 ffff8801db221b98
ffff8801d5da7570 ffffffff839e377d 0000000000000000 ffff8801d4fb08ea
ffff8801d5da76d0 0000000000000046 ffff8801db222468Call Trace:
[<ffffffff839e4d7f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3557
[<ffffffff839f1191>] schedule_timeout+0x861/0xf70 kernel/time/timer.c:1768
[<ffffffff839ed8ae>] __down_common kernel/locking/semaphore.c:221 [inline]
[<ffffffff839ed8ae>] __down+0x12e/0x1f0 kernel/locking/semaphore.c:238
[<ffffffff81229f1e>] down+0x5e/0x80 kernel/locking/semaphore.c:61
[<ffffffff812587dc>] console_lock+0x2c/0x80 kernel/printk/printk.c:2212
[<ffffffff8125e04c>] console_device+0x1c/0xc0 kernel/printk/printk.c:2549
[<ffffffff82116f6a>] tty_lookup_driver drivers/tty/tty_io.c:2003 [inline]
[<ffffffff82116f6a>] tty_open_by_driver drivers/tty/tty_io.c:2048 [inline]
[<ffffffff82116f6a>] tty_open+0x71a/0xe20 drivers/tty/tty_io.c:2125
[<ffffffff8157c55d>] chrdev_open+0x22d/0x4c0 fs/char_dev.c:392
[<ffffffff81567443>] do_dentry_open+0x703/0xc80 fs/open.c:766
[<ffffffff8156ac2c>] vfs_open+0x11c/0x210 fs/open.c:879
[<ffffffff815a1d68>] do_last fs/namei.c:3410 [inline]
[<ffffffff815a1d68>] path_openat+0x758/0x3590 fs/namei.c:3534
[<ffffffff815a8e67>] do_filp_open+0x197/0x270 fs/namei.c:3568
[<ffffffff8156b63d>] do_sys_open+0x30d/0x5c0 fs/open.c:1072
[<ffffffff8156b91d>] SYSC_open fs/open.c:1090 [inline]
[<ffffffff8156b91d>] SyS_open+0x2d/0x40 fs/open.c:1085
[<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
[<ffffffff839f4653>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Showing all locks held in the system:
2 locks held by khungtaskd/519:
#0:
(rcu_read_lock){......}, at: [<ffffffff813646ec>]
check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
(rcu_read_lock){......}, at: [<ffffffff813646ec>] watchdog+0x11c/0xa20
kernel/hung_task.c:239
(tasklist_lock){.+.+..}, at: [<ffffffff81423ba0>]
debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
#0:
(&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d565c>] __fdget_pos+0xac/0xd0
fs/file.c:781
#0:
(&tty->ldisc_sem){++++++}, at: [<ffffffff839f2822>]
ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
(&ldata->atomic_read_lock){+.+...}, at: [<ffffffff8211cc12>]
n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2133
#0:
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open_by_driver
drivers/tty/tty_io.c:2047 [inline]
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open+0x46c/0xe20
drivers/tty/tty_io.c:2125
#0:
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open_by_driver
drivers/tty/tty_io.c:2047 [inline]
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open+0x46c/0xe20
drivers/tty/tty_io.c:2125
#0:
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open_by_driver
drivers/tty/tty_io.c:2047 [inline]
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open+0x46c/0xe20
drivers/tty/tty_io.c:2125
#0:
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open_by_driver
drivers/tty/tty_io.c:2047 [inline]
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open+0x46c/0xe20
drivers/tty/tty_io.c:2125
#0:
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open_by_driver
drivers/tty/tty_io.c:2047 [inline]
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open+0x46c/0xe20
drivers/tty/tty_io.c:2125
#0:
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open_by_driver
drivers/tty/tty_io.c:2047 [inline]
(tty_mutex){+.+.+.}, at: [<ffffffff82116cbc>] tty_open+0x46c/0xe20
drivers/tty/tty_io.c:2125
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.98-g9731a2d #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
ffff8801d8b17d08
ffffffff81eb0ee9 0000000000000000 0000000000000001 0000000000000001
0000000000000001 ffffffff810b7da0 ffff8801d8b17d40 ffffffff81ebc1e7
0000000000000001 0000000000000000 0000000000000003Call Trace:
[<ffffffff81eb0ee9>] __dump_stack lib/dump_stack.c:15 [inline]
[<ffffffff81eb0ee9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
[<ffffffff81ebc1e7>] nmi_cpu_backtrace.cold.2+0x48/0x87
lib/nmi_backtrace.c:99
[<ffffffff81ebc17a>] nmi_trigger_cpumask_backtrace+0x12a/0x14f
lib/nmi_backtrace.c:60
[<ffffffff810b7ea4>] arch_trigger_cpumask_backtrace+0x14/0x20
arch/x86/kernel/apic/hw_nmi.c:37
[<ffffffff81364c84>] trigger_all_cpu_backtrace include/linux/nmi.h:58
[inline]
[<ffffffff81364c84>] check_hung_task kernel/hung_task.c:125 [inline]
[<ffffffff81364c84>] check_hung_uninterruptible_tasks
kernel/hung_task.c:182 [inline]
[<ffffffff81364c84>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
[<ffffffff8119ad5d>] kthread+0x26d/0x300 kernel/kthread.c:211
[<ffffffff839f481c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6908 Comm: syz-executor376 Not tainted 4.9.98-g9731a2d #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
task: ffff8801cde1c800 task.stack: ffff8801c0950000
RIP: 0010:[<ffffffff81ee4fa9>] c [<ffffffff81ee4fa9>] memset_erms+0x9/0x10
arch/x86/lib/memset_64.S:64
RSP: 0018:ffff8801c09576f8 EFLAGS: 00010206
RAX: dffffc00000000ff RBX: 00000000001bcc00 RCX: 000000000001c880
RDX: 0000000000040000 RSI: 00000000000000ff RDI: ffffed00379a3780
RBP: ffff8801c0957700 R08: 1ffff10037980000 R09: ffffed0037980000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000009
R13: ffff8801bcc00000 R14: 0000000000000000 R15: ffffea0006f30000
FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020200000 CR3: 000000000461e000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
ffffffff815388c9 c ffff8801c0957790 c ffffffff8144825c c 0000000000000046 c
0000000000000000 c ffff8801cde1d0c0 c ffff8801cde1d0c0 c ffff8801cde1c800 c
ffffffff839f3d7a c 0000000000000286 c 0000000000000000 c ffff8801c0957c48 c
Call Trace:
[<ffffffff8144825c>] free_pages_prepare mm/page_alloc.c:1067 [inline]
[<ffffffff8144825c>] __free_pages_ok+0x1ec/0x1610 mm/page_alloc.c:1263
[<ffffffff814496de>] free_compound_page+0x5e/0x70 mm/page_alloc.c:594
[<ffffffff8154f409>] free_transhuge_page+0x99/0xc0 mm/huge_memory.c:2228
[<ffffffff81461a40>] __put_compound_page+0x80/0xc0 mm/swap.c:94
[<ffffffff81463634>] release_pages+0x2f4/0x970 mm/swap.c:763
[<ffffffff81506437>] free_pages_and_swap_cache+0x117/0x160
mm/swap_state.c:273
[<ffffffff814bdbf4>] tlb_flush_mmu_free+0xb4/0x150 mm/memory.c:259
[<ffffffff814c146d>] tlb_flush_mmu+0x1d/0x20 mm/memory.c:268
[<ffffffff81546ce4>] tlb_remove_page_size include/asm-generic/tlb.h:154
[inline]
[<ffffffff81546ce4>] tlb_remove_page include/asm-generic/tlb.h:172 [inline]
[<ffffffff81546ce4>] zap_huge_pmd+0x404/0x860 mm/huge_memory.c:1424
[<ffffffff814c628f>] zap_pmd_range mm/memory.c:1245 [inline]
[<ffffffff814c628f>] zap_pud_range mm/memory.c:1279 [inline]
[<ffffffff814c628f>] unmap_page_range+0x12af/0x1730 mm/memory.c:1300
[<ffffffff814c6811>] unmap_single_vma+0x101/0x260 mm/memory.c:1345
[<ffffffff814c7152>] unmap_vmas+0x102/0x1d0 mm/memory.c:1375
[<ffffffff814df8b4>] exit_mmap+0x214/0x3f0 mm/mmap.c:2988
[<ffffffff81129dd3>] __mmput kernel/fork.c:878 [inline]
[<ffffffff81129dd3>] mmput+0xf3/0x2d0 kernel/fork.c:900
[<ffffffff8113ebb6>] exit_mm kernel/exit.c:518 [inline]
[<ffffffff8113ebb6>] do_exit+0x906/0x27c0 kernel/exit.c:824
[<ffffffff81144d91>] do_group_exit+0x111/0x340 kernel/exit.c:941
[<ffffffff81144fdd>] SYSC_exit_group kernel/exit.c:952 [inline]
[<ffffffff81144fdd>] SyS_exit_group+0x1d/0x20 kernel/exit.c:950
[<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
[<ffffffff839f4653>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: c48 cc1 ce9 c03 c40 c0f cb6 cf6 c48 cb8 c01 c01 c01 c01
c01 c01 c01 c01 c48 c0f caf cc6 cf3 c48 cab c89 cd1 cf3 caa
c4c c89 cc8 cc3 c90 c49 c89 cf9 c40 c88 cf0 c48 c89 cd1
c<f3> caa c4c c89 cc8 cc3 c90 c49 c89 cfa c40 c0f cb6 cce
c48 cb8 c01 c01 c01 c01 c01 c
---
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#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
syzbot
Apr 13, 2019, 8:00:42 PM4/13/19
to syzkaller-a...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 98b6097d FROMLIST: f2fs: run fstrim asynchronously if runt..
syzbot found the following crash on:
git tree: android-4.4
console output: https://syzkaller.appspot.com/x/log.txt?x=14f05c8f800000
kernel config: https://syzkaller.appspot.com/x/.config?x=76a2e37c4f06d098
dashboard link: https://syzkaller.appspot.com/bug?extid=cddcb6602c6bb21256b7
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1381cbef800000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14d76d4f800000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
binder: BINDER_SET_CONTEXT_MGR already set
binder: 3965:3965 ioctl 40046207 0 returned -16
binder_alloc: binder_alloc_mmap_handler: 3965 20001000-20004000 already
mapped failed -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 3965:3965 ioctl 40046207 0 returned -16
INFO: task init:1 blocked for more than 120 seconds.
Not tainted 4.4.135-g98b6097 #58
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init D ffff8801d99b7570 24064 1 0 0x00000004
ffff8801d99b7570 ffff8801d99a88e0 000000000000017c ffff8801d99a8902
ffff8801d99a8900 ffff8801db31fdb8 ffff8801db31fde0 ffff8801db31f4d8
ffff8801db31f4c0 ffff8801d9a09800 ffff8801d99a8000 0000000000000000
Call Trace:
[<ffffffff838b476a>] schedule+0x7a/0x1b0 kernel/sched/core.c:3359
[<ffffffff838bfb81>] schedule_timeout+0x481/0x8b0 kernel/time/timer.c:1515
[<ffffffff838bd235>] __down_common kernel/locking/semaphore.c:221 [inline]
[<ffffffff838bd235>] __down+0x125/0x1d0 kernel/locking/semaphore.c:238
[<ffffffff8122562e>] down+0x5e/0x80 kernel/locking/semaphore.c:61
[<ffffffff8125853c>] console_lock+0x2c/0x80 kernel/printk/printk.c:2159
[<ffffffff8125dc8c>] console_device+0x1c/0xc0 kernel/printk/printk.c:2430
[<ffffffff8204cfdf>] tty_lookup_driver drivers/tty/tty_io.c:2000 [inline]
[<ffffffff8204cfdf>] tty_open+0x8bf/0xf00 drivers/tty/tty_io.c:2068
[<ffffffff815295dd>] chrdev_open+0x22d/0x4c0 fs/char_dev.c:388
[<ffffffff81517a5b>] do_dentry_open+0x68b/0xbc0 fs/open.c:749
[<ffffffff8151b08a>] vfs_open+0x12a/0x210 fs/open.c:862
[<ffffffff8154c12e>] do_last fs/namei.c:3222 [inline]
[<ffffffff8154c12e>] path_openat+0x4ee/0x3a10 fs/namei.c:3359
[<ffffffff81552367>] do_filp_open+0x197/0x270 fs/namei.c:3393
[<ffffffff8151b9ac>] do_sys_open+0x31c/0x610 fs/open.c:1038
[<ffffffff8151bccd>] SYSC_open fs/open.c:1056 [inline]
[<ffffffff8151bccd>] SyS_open+0x2d/0x40 fs/open.c:1051
[<ffffffff838c27a5>] entry_SYSCALL_64_fastpath+0x22/0x9e
1 lock held by init/1:
#0: (tty_mutex){+.+.+.}, at: [<ffffffff8204cc5e>] tty_open+0x53e/0xf00
drivers/tty/tty_io.c:2067
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 3960 Comm: syz-executor617 Not tainted 4.4.135-g98b6097 #58
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
task: ffff8800bb13e000 task.stack: ffff8800b9b08000
Google 01/01/2011
RIP: 0010:[<ffffffff82083f5b>] [<ffffffff82083f5b>] inb
arch/x86/include/asm/io.h:316 [inline]
RIP: 0010:[<ffffffff82083f5b>] [<ffffffff82083f5b>] io_serial_in+0x6b/0x90
drivers/tty/serial/8250/8250_port.c:398
RSP: 0018:ffff8800b9b0f7f0 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff82083f01 RDI: ffffffff862aa4f8
RBP: ffff8800b9b0f800 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff858ed15a R12: ffffffff862aa4c0
R13: 0000000000000020 R14: fffffbfff0c554df R15: fffffbfff0c554a1
FS: 0000000002477880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006cf090 CR3: 00000000b10e2000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
ffffffff862aa4c0 0000000000002710 ffff8800b9b0f850 ffffffff82085abf
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
ffffffff81e37875 ffffffff862aa508 ffffffff862aa6fa ffffffff862aa4c0
0000000000000020 ffffffff82085c10 dffffc0000000000 0000000000000020
Call Trace:
[<ffffffff82085abf>] serial_in drivers/tty/serial/8250/8250.h:97 [inline]
[<ffffffff82085abf>] wait_for_xmitr+0x8f/0x1e0
drivers/tty/serial/8250/8250_port.c:1717
[<ffffffff82085c2f>] serial8250_console_putchar+0x1f/0x60
drivers/tty/serial/8250/8250_port.c:2806
[<ffffffff820700c9>] uart_console_write+0x59/0xf0
drivers/tty/serial/serial_core.c:1789
[<ffffffff82090289>] serial8250_console_write+0x539/0x830
drivers/tty/serial/8250/8250_port.c:2872
[<ffffffff8207ec6f>] univ8250_console_write+0x5f/0x70
drivers/tty/serial/8250/8250_core.c:594
[<ffffffff81259f1f>] call_console_drivers.constprop.28+0x1ef/0x3f0
kernel/printk/printk.c:1463
[<ffffffff8125cbf5>] console_unlock+0x605/0xa10 kernel/printk/printk.c:2330
[<ffffffff8125d51e>] vprintk_emit+0x51e/0x840 kernel/printk/printk.c:1832
[<ffffffff8125d868>] vprintk+0x28/0x30 kernel/printk/printk.c:1843
[<ffffffff8125d88d>] vprintk_default+0x1d/0x30 kernel/printk/printk.c:1844
[<ffffffff814152a8>] printk+0xaf/0xd7 kernel/printk/printk.c:1922
[<ffffffff82dd0fcc>] binder_ioctl.cold.83+0x91/0x132
drivers/android/binder.c:4842
[<ffffffff81559bbf>] vfs_ioctl fs/ioctl.c:43 [inline]
[<ffffffff81559bbf>] file_ioctl fs/ioctl.c:470 [inline]
[<ffffffff81559bbf>] do_vfs_ioctl+0x63f/0xf40 fs/ioctl.c:605
[<ffffffff8155a54f>] SYSC_ioctl fs/ioctl.c:622 [inline]
[<ffffffff8155a54f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613
[<ffffffff838c27a5>] entry_SYSCALL_64_fastpath+0x22/0x9e
Code: 24 c1 00 00 00 49 8d 7c 24 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa
48 c1 ea 03 d3 e3 80 3c 02 00 75 17 41 03 5c 24 38 89 da ec <5b> 0f b6 c0
41 5c 5d c3 e8 78 57 47 ff eb c2 e8 d1 57 47 ff eb
NMI backtrace for cpu 1
CPU: 1 PID: 492 Comm: khungtaskd Not tainted 4.4.135-g98b6097 #58
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
task: ffff8801d8ca0000 task.stack: ffff8801d8d20000
Google 01/01/2011
RIP: 0010:[<ffffffff810bfeb6>] [<ffffffff810bfeb6>] native_apic_mem_write
arch/x86/include/asm/apic.h:94 [inline]
RIP: 0010:[<ffffffff810bfeb6>] [<ffffffff810bfeb6>]
__default_send_IPI_dest_field arch/x86/include/asm/ipi.h:119 [inline]
RIP: 0010:[<ffffffff810bfeb6>] [<ffffffff810bfeb6>] _flat_send_IPI_mask
arch/x86/kernel/apic/apic_flat_64.c:61 [inline]
RIP: 0010:[<ffffffff810bfeb6>] [<ffffffff810bfeb6>]
flat_send_IPI_mask+0xf6/0x1a0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8801d8d27cc8 EFLAGS: 00000046
RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300
RBP: ffff8801d8d27cf0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000000000003 R14: 0000000000000002 R15: ffffffff8446f7a0
FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000ec0000 CR3: 00000000b2316000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
ffffffff8446f7a0 ffffffff84a18e60 0000000000000007 fffffbfff0942c7c
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
0000000000000040 ffff8801d8d27d10 ffffffff810b5e71 ffffffff83c0b560
0000000000000003 ffff8801d8d27d68 ffffffff81e19da3 ffffffff8140dcef
Call Trace:
[<ffffffff810b5e71>] nmi_raise_cpu_backtrace+0x61/0x80
arch/x86/kernel/apic/hw_nmi.c:33
[<ffffffff81e19da3>] nmi_trigger_all_cpu_backtrace.cold.4+0x70/0xad
lib/nmi_backtrace.c:85
[<ffffffff810b5f14>] arch_trigger_all_cpu_backtrace+0x14/0x20
arch/x86/kernel/apic/hw_nmi.c:38
[<ffffffff8141a3d9>] trigger_all_cpu_backtrace include/linux/nmi.h:44
[inline]
[<ffffffff8141a3d9>] check_hung_task kernel/hung_task.c:125 [inline]
[<ffffffff8141a3d9>] check_hung_uninterruptible_tasks
kernel/hung_task.c:182 [inline]
[<ffffffff8141a3d9>] watchdog.cold.1+0xd3/0xee kernel/hung_task.c:238
[<ffffffff81190958>] kthread+0x268/0x300 kernel/kthread.c:211
[<ffffffff838c2bd5>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510
Code: b3 5f ff f6 c4 10 75 e2 44 89 e8 c1 e0 18 89 04 25 10 b3 5f ff 44 89
f2 09 da 80 cf 04 41 83 fe 02 0f 44 d3 89 14 25 00 b3 5f ff <41> f7 c4 00
02 00 00 75 1a 4c 89 e7 57 9d 0f 1f 44 00 00 e8 72
Reply all
Reply to author
Forward
0 new messages