panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr ADDR+16 ADDR!=ADDR
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syzbot
Sep 18, 2019, 9:43:07 AM9/18/19
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: dd27a176 Let snmpd's regress test make use of our very own..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1107dd1d600000
kernel config: https://syzkaller.appspot.com/x/.config?x=26ca0a9c07f16a3a
dashboard link: https://syzkaller.appspot.com/bug?extid=a2ac004ee1d48c0b510e
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+a2ac00...@syzkaller.appspotmail.com
panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item
addr 0xfffffd806f27b900+16 0x6c6bd6fe7e000000!=0x6c6bd6fe7e00c5e8
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
318583 71149 0 0 0 0 syz-executor.0
* 14041 71149 0 0 0x4000000 1K syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82658ba8) at pool_cache_get+0x323
pool_cache_item_magic_check sys/kern/subr_pool.c:1789 [inline]
pool_cache_get(ffffffff82658ba8) at pool_cache_get+0x323
sys/kern/subr_pool.c:1892
pool_get() at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tun_dev_write(ffff800000ae6000,ffff800022555678,d9) at tun_dev_write+0x96
spec_write(ffff8000225554c0) at spec_write+0xd4 sys/kern/spec_vnops.c:310
VOP_WRITE(fffffd806ebe90d8,ffff800022555678,11,fffffd807f7c6900) at
VOP_WRITE+0xc6 sys/kern/vfs_vops.c:269
vn_write(fffffd806d895c00,ffff800022555678,0) at vn_write+0x14f
sys/kern/vfs_vnops.c:405
dofilewritev(ffff800020abec70,f0,ffff800022555678,0,ffff800022555760) at
dofilewritev+0x1b7 sys/kern/sys_generic.c:364
sys_write(ffff800020abec70,ffff800022555710,ffff800022555760) at
sys_write+0x83 sys/kern/sys_generic.c:284
syscall(ffff8000225557e0) at syscall+0x4a4 mi_syscall
sys/sys/syscall_mi.h:92 [inline]
syscall(ffff8000225557e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,4,0,4,2,4cce3d5ce00) at Xsyscall+0x128
end of kernel
end trace frame: 0x4cbf8982440, count: 2
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr
0xfffffd806f27b900+16 0x6c6bd6fe7e000000!=0x6c6bd6fe7e00c5e8
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82658ba8) at pool_cache_get+0x323
pool_cache_item_magic_check sys/kern/subr_pool.c:1789 [inline]
pool_cache_get(ffffffff82658ba8) at pool_cache_get+0x323
sys/kern/subr_pool.c:1892
pool_get() at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tun_dev_write(ffff800000ae6000,ffff800022555678,d9) at tun_dev_write+0x96
spec_write(ffff8000225554c0) at spec_write+0xd4 sys/kern/spec_vnops.c:310
VOP_WRITE(fffffd806ebe90d8,ffff800022555678,11,fffffd807f7c6900) at
VOP_WRITE+0xc6 sys/kern/vfs_vops.c:269
vn_write(fffffd806d895c00,ffff800022555678,0) at vn_write+0x14f
sys/kern/vfs_vnops.c:405
dofilewritev(ffff800020abec70,f0,ffff800022555678,0,ffff800022555760) at
dofilewritev+0x1b7 sys/kern/sys_generic.c:364
sys_write(ffff800020abec70,ffff800022555710,ffff800022555760) at
sys_write+0x83 sys/kern/sys_generic.c:284
syscall(ffff8000225557e0) at syscall+0x4a4 mi_syscall
sys/sys/syscall_mi.h:92 [inline]
syscall(ffff8000225557e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,4,0,4,2,4cce3d5ce00) at Xsyscall+0x128
end of kernel
end trace frame: 0x4cbf8982440, count: -13
ddb{1}> show registers
rdi 0xffffffff81c5afd7 db_enter+0x17
rsi 0x369a __ALIGN_SIZE+0x269a
rbp 0xffff800022555160
rbx 0xffff800022555210
rdx 0x369b __ALIGN_SIZE+0x269b
rcx 0xffff800022966000
rax 0xffff800022966000
r8 0xffffffff81ebdc8f kprintf+0x16f
r9 0x1
r10 0x25
r11 0x878cace07f75d87f
r12 0x3000000008
r13 0xffff800022555170
r14 0x100
r15 0x1
rip 0xffffffff81c5afd8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800022555150
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=14041 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=50, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800020abf3d8,0xffff800020abe790
process=0xffff800020addc00 user=0xffff800022550000,
vmspace=0xfffffd807f00ccf0
estcpu=8, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
237 513053 53730 0 2 0 syz-executor.1
237 474387 53730 0 2 0x4000000 syz-executor.1
71149 318583 4314 0 7 0 syz-executor.0
71149 510027 4314 0 2 0x4000000 syz-executor.0
*71149 14041 4314 0 7 0x4000000 syz-executor.0
4314 191232 97034 0 3 0x82 nanosleep syz-executor.0
53730 513466 97034 0 3 0x82 nanosleep syz-executor.1
92541 276303 0 0 3 0x14200 bored sosplice
97034 53913 22643 0 3 0x82 thrsleep syz-fuzzer
97034 165322 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 363371 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 400990 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 461745 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 19867 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 215569 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 406602 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 433110 22643 0 3 0x4000082 kqread syz-fuzzer
97034 325827 22643 0 3 0x4000082 thrsleep syz-fuzzer
22643 297508 60998 0 3 0x10008a pause ksh
60998 499690 60497 0 3 0x92 select sshd
79412 461194 1 0 3 0x100083 ttyin getty
60497 319531 1 0 3 0x80 select sshd
81467 328044 71239 74 3 0x100092 bpf pflogd
71239 17731 1 0 3 0x80 netio pflogd
10582 57889 11918 73 3 0x100090 kqread syslogd
11918 83989 1 0 3 0x100082 netio syslogd
54078 51560 0 0 2 0x14200 zerothread
86040 453506 0 0 3 0x14200 aiodoned aiodoned
86825 240277 0 0 3 0x14200 syncer update
67133 286012 0 0 3 0x14200 cleaner cleaner
16581 29656 0 0 3 0x14200 reaper reaper
60797 369523 0 0 3 0x14200 pgdaemon pagedaemon
35584 295880 0 0 3 0x14200 bored crynlk
27777 330393 0 0 3 0x14200 bored crypto
73075 103633 0 0 3 0x40014200 acpi0 acpi0
9084 520434 0 0 3 0x40014200 idle1
79916 200713 0 0 3 0x14200 bored softnet
18319 137392 0 0 3 0x14200 bored systqmp
60884 9832 0 0 3 0x14200 bored systq
17099 154527 0 0 3 0x40014200 bored softclock
5356 275553 0 0 3 0x40014200 idle0
64902 313437 0 0 3 0x14200 bored smr
1 382424 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 71149 (syz-executor.0) thread 0xffff800020abec70 (14041)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82623840)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 vn_write+0x42 sys/kern/vfs_vnops.c:390
#2 dofilewritev+0x1b7 sys/kern/sys_generic.c:364
#3 sys_write+0x83 sys/kern/sys_generic.c:284
#4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#5 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9558 6451K 9035K 78643K 42616 0 0
pcb 13 10K 12K 78643K 1102 0 0
rtable 116 4K 5K 78643K 2231 0 0
ifaddr 72 26K 34K 78643K 2212 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1627 0 0
iov 0 0K 24K 78643K 1260 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1245 78K 78K 78643K 9555 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 168 0 0
VM map 2 1K 1K 78643K 4 0 0
sem 12 0K 1K 78643K 1511 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 6 17K 25K 78643K 7660 0 0
sigio 0 0K 0K 78643K 31 0 0
proc 57 51K 95K 78643K 1561 0 0
subproc 32 2K 2K 78643K 412 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 10082 0 0
in_multi 33 2K 2K 78643K 1104 0 0
ether_multi 1 0K 0K 78643K 21 0 0
mrt 1 0K 0K 78643K 12 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 84 371K 371K 78643K 84 0 0
exec 0 0K 1K 78643K 1631 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 116 22K 31K 78643K 24230 0 0
UVM aobj 130 4K 4K 78643K 130 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 0K 78643K 499 0 0
NDP 18 0K 0K 78643K 599 0 0
temp 200 3556K 4196K 78643K 55678 0 0
kqueue 0 0K 0K 78643K 14 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg
Idle
arp 64 222 0 217 1 0 1 1 0
8 0
plcache 128 20 0 0 1 0 1 1 0
8 0
rtpcb 80 635 0 635 3 2 1 1 0
8 1
rtentry 112 623 0 579 2 0 2 2 0
8 0
unpcb 120 2026 0 2008 5 4 1 2 0
8 0
syncache 264 9 0 9 4 4 0 1 0
8 0
tcpqe 32 5890 0 5890 3 3 0 1 0
8 0
tcpcb 544 9572 0 9568 18 17 1 3 0
8 0
inpcb 280 17449 0 17445 24 23 1 13 0
8 0
rttmr 72 3 0 3 3 2 1 1 0
8 1
nd6 48 48 0 44 1 0 1 1 0
8 0
pkpcb 40 13 0 13 5 5 0 1 0
8 0
ppxss 1128 496 0 496 14 13 1 1 0
8 1
pffrag 232 3 0 3 3 3 0 1 0
482 0
pffrnode 88 3 0 3 3 3 0 1 0
8 0
pffrent 40 9 0 9 3 3 0 1 0
8 0
pfosfp 40 846 0 423 5 0 5 5 0
8 0
pfosfpen 112 1428 0 714 21 0 21 21 0
8 0
pfstitem 24 164 0 124 1 0 1 1 0
8 0
pfstkey 112 164 0 124 2 0 2 2 0
8 0
pfstate 328 164 0 124 5 0 5 5 0
8 0
pfrule 1360 21 0 16 2 1 1 2 0
8 0
art_heap8 4096 1 0 0 1 0 1 1 0
8 0
art_heap4 256 1447 0 1174 20 2 18 18 0
8 0
art_table 32 1448 0 1174 3 0 3 3 0
8 0
art_node 16 612 0 572 1 0 1 1 0
8 0
sysvmsgpl 40 106 0 99 1 0 1 1 0
8 0
semupl 112 1 0 1 1 1 0 1 0
8 0
semapl 112 1509 0 1499 1 0 1 1 0
8 0
shmpl 112 128 0 0 4 0 4 4 0
8 0
dirhash 1024 17 0 0 3 0 3 3 0
8 0
dino1pl 128 12455 0 11045 46 0 46 46 0
8 0
ffsino 272 12455 0 11045 95 0 95 95 0
8 0
nchpl 144 23515 0 21866 62 0 62 62 0
8 0
uvmvnodes 72 5926 0 0 108 0 108 108 0
8 0
vnodes 208 5926 0 0 312 0 312 312 0
8 0
namei 1024 72265 0 72265 4 3 1 1 0
8 1
percpumem 16 30 0 0 1 0 1 1 0
8 0
vmpool 552 2 0 2 1 1 0 1 0
8 0
scsiplug 64 12 0 12 7 7 0 1 0
8 0
scxspl 192 64236 0 64236 21 20 1 7 0
8 1
plimitpl 152 405 0 398 1 0 1 1 0
8 0
sigapl 432 7794 0 7780 4 2 2 3 0
8 0
futexpl 56 150943 0 150943 2 1 1 1 0
8 1
knotepl 112 1049 0 1030 2 1 1 2 0
8 0
kqueuepl 104 1261 0 1259 2 1 1 2 0
8 0
pipepl 112 4184 0 4165 9 8 1 2 0
8 0
fdescpl 488 7795 0 7780 3 0 3 3 0
8 0
filepl 152 58387 0 58296 25 20 5 13 0
8 1
lockfpl 104 2785 0 2785 1 0 1 1 0
8 1
lockfspl 48 845 0 845 1 0 1 1 0
8 1
sessionpl 112 40 0 31 1 0 1 1 0
8 0
pgrppl 48 87 0 78 1 0 1 1 0
8 0
ucredpl 96 5696 0 5687 1 0 1 1 0
8 0
zombiepl 144 7783 0 7783 4 3 1 1 0
8 1
processpl 896 7814 0 7783 4 0 4 4 0
8 0
procpl 632 22397 0 22354 12 8 4 5 0
8 0
srpgc 64 46 0 46 18 17 1 1 0
8 1
sosppl 128 116 0 116 13 13 0 1 0
8 0
sockpl 384 20254 0 20232 43 39 4 22 0
8 0
mcl64k 65536 17 0 0 3 0 3 3 0
8 0
mcl16k 16384 17 0 0 3 0 3 3 0
8 1
mcl12k 12288 25 0 0 2 0 2 2 0
8 0
mcl9k 9216 21 0 0 2 0 2 2 0
8 0
mcl8k 8192 25 0 0 4 1 3 3 0
8 0
mcl4k 4096 17 0 0 3 0 3 3 0
8 0
mcl2k2 2112 7 0 0 1 0 1 1 0
8 0
mcl2k 2048 158 0 0 15 1 14 15 0
8 0
mtagpl 80 69 0 0 1 0 1 1 0
8 0
mbufpl 256 378 0 0 14 0 14 14 0
8 0
bufpl 256 17825 0 10777 441 0 441 441 0
8 0
anonpl 16 626334 0 614980 154 89 65 78 0
124 1
amapchunkpl 152 42480 0 42375 40 34 6 18 0
158 0
amappl16 192 34229 0 33340 116 70 46 55 0
8 1
amappl15 184 258 0 258 3 3 0 1 0
8 0
amappl14 176 1358 0 1354 2 1 1 1 0
8 0
amappl13 168 696 0 696 3 3 0 1 0
8 0
amappl12 160 1142 0 1140 4 3 1 1 0
8 0
amappl11 152 715 0 707 1 0 1 1 0
8 0
amappl10 144 2237 0 2233 1 0 1 1 0
8 0
amappl9 136 2020 0 2013 1 0 1 1 0
8 0
amappl8 128 1604 0 1562 2 0 2 2 0
8 0
amappl7 120 2341 0 2332 1 0 1 1 0
8 0
amappl6 112 721 0 701 1 0 1 1 0
8 0
amappl5 104 1427 0 1413 1 0 1 1 0
8 0
amappl4 96 7586 0 7555 1 0 1 1 0
8 0
amappl3 88 2373 0 2366 1 0 1 1 0
8 0
amappl2 80 60560 0 60484 4 2 2 3 0
8 0
amappl1 72 167892 0 167465 25 15 10 20 0
8 0
amappl 80 22996 0 22961 1 0 1 1 0
84 0
dma4096 4096 1 0 1 1 1 0 1 0
8 0
dma256 256 6 0 6 1 1 0 1 0
8 0
dma64 64 259 0 259 1 1 0 1 0
8 0
dma32 32 7 0 7 1 1 0 1 0
8 0
dma16 16 17 0 17 1 1 0 1 0
8 0
aobjpl 64 129 0 0 3 0 3 3 0
8 0
uaddrrnd 24 7797 0 7780 1 0 1 1 0
8 0
uaddrbest 32 2 0 0 1 0 1 1 0
8 0
uaddr 24 7797 0 7780 1 0 1 1 0
8 0
vmmpekpl 168 52060 0 52023 2 0 2 2 0
8 0
vmmpepl 168 934161 0 932084 337 216 121 121 0 357
29
vmsppl 368 7794 0 7780 2 0 2 2 0
8 0
pdppl 4096 15601 0 15564 8 3 5 6 0
8 0
pvpl 32 1740202 0 1725624 365 205 160 187 0
265 9
pmappl 232 7796 0 7782 4 3 1 2 0
8 0
extentpl 40 41 0 26 1 0 1 1 0
8 0
phpool 112 638 0 30 18 0 18 18 0
8 0
---
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 found the following crash on:
HEAD commit: dd27a176 Let snmpd's regress test make use of our very own..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1107dd1d600000
kernel config: https://syzkaller.appspot.com/x/.config?x=26ca0a9c07f16a3a
dashboard link: https://syzkaller.appspot.com/bug?extid=a2ac004ee1d48c0b510e
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+a2ac00...@syzkaller.appspotmail.com
panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item
addr 0xfffffd806f27b900+16 0x6c6bd6fe7e000000!=0x6c6bd6fe7e00c5e8
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
318583 71149 0 0 0 0 syz-executor.0
* 14041 71149 0 0 0x4000000 1K syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82658ba8) at pool_cache_get+0x323
pool_cache_item_magic_check sys/kern/subr_pool.c:1789 [inline]
pool_cache_get(ffffffff82658ba8) at pool_cache_get+0x323
sys/kern/subr_pool.c:1892
pool_get() at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tun_dev_write(ffff800000ae6000,ffff800022555678,d9) at tun_dev_write+0x96
spec_write(ffff8000225554c0) at spec_write+0xd4 sys/kern/spec_vnops.c:310
VOP_WRITE(fffffd806ebe90d8,ffff800022555678,11,fffffd807f7c6900) at
VOP_WRITE+0xc6 sys/kern/vfs_vops.c:269
vn_write(fffffd806d895c00,ffff800022555678,0) at vn_write+0x14f
sys/kern/vfs_vnops.c:405
dofilewritev(ffff800020abec70,f0,ffff800022555678,0,ffff800022555760) at
dofilewritev+0x1b7 sys/kern/sys_generic.c:364
sys_write(ffff800020abec70,ffff800022555710,ffff800022555760) at
sys_write+0x83 sys/kern/sys_generic.c:284
syscall(ffff8000225557e0) at syscall+0x4a4 mi_syscall
sys/sys/syscall_mi.h:92 [inline]
syscall(ffff8000225557e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,4,0,4,2,4cce3d5ce00) at Xsyscall+0x128
end of kernel
end trace frame: 0x4cbf8982440, count: 2
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr
0xfffffd806f27b900+16 0x6c6bd6fe7e000000!=0x6c6bd6fe7e00c5e8
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82658ba8) at pool_cache_get+0x323
pool_cache_item_magic_check sys/kern/subr_pool.c:1789 [inline]
pool_cache_get(ffffffff82658ba8) at pool_cache_get+0x323
sys/kern/subr_pool.c:1892
pool_get() at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tun_dev_write(ffff800000ae6000,ffff800022555678,d9) at tun_dev_write+0x96
spec_write(ffff8000225554c0) at spec_write+0xd4 sys/kern/spec_vnops.c:310
VOP_WRITE(fffffd806ebe90d8,ffff800022555678,11,fffffd807f7c6900) at
VOP_WRITE+0xc6 sys/kern/vfs_vops.c:269
vn_write(fffffd806d895c00,ffff800022555678,0) at vn_write+0x14f
sys/kern/vfs_vnops.c:405
dofilewritev(ffff800020abec70,f0,ffff800022555678,0,ffff800022555760) at
dofilewritev+0x1b7 sys/kern/sys_generic.c:364
sys_write(ffff800020abec70,ffff800022555710,ffff800022555760) at
sys_write+0x83 sys/kern/sys_generic.c:284
syscall(ffff8000225557e0) at syscall+0x4a4 mi_syscall
sys/sys/syscall_mi.h:92 [inline]
syscall(ffff8000225557e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,4,0,4,2,4cce3d5ce00) at Xsyscall+0x128
end of kernel
end trace frame: 0x4cbf8982440, count: -13
ddb{1}> show registers
rdi 0xffffffff81c5afd7 db_enter+0x17
rsi 0x369a __ALIGN_SIZE+0x269a
rbp 0xffff800022555160
rbx 0xffff800022555210
rdx 0x369b __ALIGN_SIZE+0x269b
rcx 0xffff800022966000
rax 0xffff800022966000
r8 0xffffffff81ebdc8f kprintf+0x16f
r9 0x1
r10 0x25
r11 0x878cace07f75d87f
r12 0x3000000008
r13 0xffff800022555170
r14 0x100
r15 0x1
rip 0xffffffff81c5afd8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800022555150
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=14041 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=50, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800020abf3d8,0xffff800020abe790
process=0xffff800020addc00 user=0xffff800022550000,
vmspace=0xfffffd807f00ccf0
estcpu=8, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
237 513053 53730 0 2 0 syz-executor.1
237 474387 53730 0 2 0x4000000 syz-executor.1
71149 318583 4314 0 7 0 syz-executor.0
71149 510027 4314 0 2 0x4000000 syz-executor.0
*71149 14041 4314 0 7 0x4000000 syz-executor.0
4314 191232 97034 0 3 0x82 nanosleep syz-executor.0
53730 513466 97034 0 3 0x82 nanosleep syz-executor.1
92541 276303 0 0 3 0x14200 bored sosplice
97034 53913 22643 0 3 0x82 thrsleep syz-fuzzer
97034 165322 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 363371 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 400990 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 461745 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 19867 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 215569 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 406602 22643 0 3 0x4000082 thrsleep syz-fuzzer
97034 433110 22643 0 3 0x4000082 kqread syz-fuzzer
97034 325827 22643 0 3 0x4000082 thrsleep syz-fuzzer
22643 297508 60998 0 3 0x10008a pause ksh
60998 499690 60497 0 3 0x92 select sshd
79412 461194 1 0 3 0x100083 ttyin getty
60497 319531 1 0 3 0x80 select sshd
81467 328044 71239 74 3 0x100092 bpf pflogd
71239 17731 1 0 3 0x80 netio pflogd
10582 57889 11918 73 3 0x100090 kqread syslogd
11918 83989 1 0 3 0x100082 netio syslogd
54078 51560 0 0 2 0x14200 zerothread
86040 453506 0 0 3 0x14200 aiodoned aiodoned
86825 240277 0 0 3 0x14200 syncer update
67133 286012 0 0 3 0x14200 cleaner cleaner
16581 29656 0 0 3 0x14200 reaper reaper
60797 369523 0 0 3 0x14200 pgdaemon pagedaemon
35584 295880 0 0 3 0x14200 bored crynlk
27777 330393 0 0 3 0x14200 bored crypto
73075 103633 0 0 3 0x40014200 acpi0 acpi0
9084 520434 0 0 3 0x40014200 idle1
79916 200713 0 0 3 0x14200 bored softnet
18319 137392 0 0 3 0x14200 bored systqmp
60884 9832 0 0 3 0x14200 bored systq
17099 154527 0 0 3 0x40014200 bored softclock
5356 275553 0 0 3 0x40014200 idle0
64902 313437 0 0 3 0x14200 bored smr
1 382424 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 71149 (syz-executor.0) thread 0xffff800020abec70 (14041)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82623840)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 vn_write+0x42 sys/kern/vfs_vnops.c:390
#2 dofilewritev+0x1b7 sys/kern/sys_generic.c:364
#3 sys_write+0x83 sys/kern/sys_generic.c:284
#4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#5 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9558 6451K 9035K 78643K 42616 0 0
pcb 13 10K 12K 78643K 1102 0 0
rtable 116 4K 5K 78643K 2231 0 0
ifaddr 72 26K 34K 78643K 2212 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1627 0 0
iov 0 0K 24K 78643K 1260 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1245 78K 78K 78643K 9555 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 168 0 0
VM map 2 1K 1K 78643K 4 0 0
sem 12 0K 1K 78643K 1511 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 6 17K 25K 78643K 7660 0 0
sigio 0 0K 0K 78643K 31 0 0
proc 57 51K 95K 78643K 1561 0 0
subproc 32 2K 2K 78643K 412 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 10082 0 0
in_multi 33 2K 2K 78643K 1104 0 0
ether_multi 1 0K 0K 78643K 21 0 0
mrt 1 0K 0K 78643K 12 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 84 371K 371K 78643K 84 0 0
exec 0 0K 1K 78643K 1631 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 116 22K 31K 78643K 24230 0 0
UVM aobj 130 4K 4K 78643K 130 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 0K 78643K 499 0 0
NDP 18 0K 0K 78643K 599 0 0
temp 200 3556K 4196K 78643K 55678 0 0
kqueue 0 0K 0K 78643K 14 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg
Idle
arp 64 222 0 217 1 0 1 1 0
8 0
plcache 128 20 0 0 1 0 1 1 0
8 0
rtpcb 80 635 0 635 3 2 1 1 0
8 1
rtentry 112 623 0 579 2 0 2 2 0
8 0
unpcb 120 2026 0 2008 5 4 1 2 0
8 0
syncache 264 9 0 9 4 4 0 1 0
8 0
tcpqe 32 5890 0 5890 3 3 0 1 0
8 0
tcpcb 544 9572 0 9568 18 17 1 3 0
8 0
inpcb 280 17449 0 17445 24 23 1 13 0
8 0
rttmr 72 3 0 3 3 2 1 1 0
8 1
nd6 48 48 0 44 1 0 1 1 0
8 0
pkpcb 40 13 0 13 5 5 0 1 0
8 0
ppxss 1128 496 0 496 14 13 1 1 0
8 1
pffrag 232 3 0 3 3 3 0 1 0
482 0
pffrnode 88 3 0 3 3 3 0 1 0
8 0
pffrent 40 9 0 9 3 3 0 1 0
8 0
pfosfp 40 846 0 423 5 0 5 5 0
8 0
pfosfpen 112 1428 0 714 21 0 21 21 0
8 0
pfstitem 24 164 0 124 1 0 1 1 0
8 0
pfstkey 112 164 0 124 2 0 2 2 0
8 0
pfstate 328 164 0 124 5 0 5 5 0
8 0
pfrule 1360 21 0 16 2 1 1 2 0
8 0
art_heap8 4096 1 0 0 1 0 1 1 0
8 0
art_heap4 256 1447 0 1174 20 2 18 18 0
8 0
art_table 32 1448 0 1174 3 0 3 3 0
8 0
art_node 16 612 0 572 1 0 1 1 0
8 0
sysvmsgpl 40 106 0 99 1 0 1 1 0
8 0
semupl 112 1 0 1 1 1 0 1 0
8 0
semapl 112 1509 0 1499 1 0 1 1 0
8 0
shmpl 112 128 0 0 4 0 4 4 0
8 0
dirhash 1024 17 0 0 3 0 3 3 0
8 0
dino1pl 128 12455 0 11045 46 0 46 46 0
8 0
ffsino 272 12455 0 11045 95 0 95 95 0
8 0
nchpl 144 23515 0 21866 62 0 62 62 0
8 0
uvmvnodes 72 5926 0 0 108 0 108 108 0
8 0
vnodes 208 5926 0 0 312 0 312 312 0
8 0
namei 1024 72265 0 72265 4 3 1 1 0
8 1
percpumem 16 30 0 0 1 0 1 1 0
8 0
vmpool 552 2 0 2 1 1 0 1 0
8 0
scsiplug 64 12 0 12 7 7 0 1 0
8 0
scxspl 192 64236 0 64236 21 20 1 7 0
8 1
plimitpl 152 405 0 398 1 0 1 1 0
8 0
sigapl 432 7794 0 7780 4 2 2 3 0
8 0
futexpl 56 150943 0 150943 2 1 1 1 0
8 1
knotepl 112 1049 0 1030 2 1 1 2 0
8 0
kqueuepl 104 1261 0 1259 2 1 1 2 0
8 0
pipepl 112 4184 0 4165 9 8 1 2 0
8 0
fdescpl 488 7795 0 7780 3 0 3 3 0
8 0
filepl 152 58387 0 58296 25 20 5 13 0
8 1
lockfpl 104 2785 0 2785 1 0 1 1 0
8 1
lockfspl 48 845 0 845 1 0 1 1 0
8 1
sessionpl 112 40 0 31 1 0 1 1 0
8 0
pgrppl 48 87 0 78 1 0 1 1 0
8 0
ucredpl 96 5696 0 5687 1 0 1 1 0
8 0
zombiepl 144 7783 0 7783 4 3 1 1 0
8 1
processpl 896 7814 0 7783 4 0 4 4 0
8 0
procpl 632 22397 0 22354 12 8 4 5 0
8 0
srpgc 64 46 0 46 18 17 1 1 0
8 1
sosppl 128 116 0 116 13 13 0 1 0
8 0
sockpl 384 20254 0 20232 43 39 4 22 0
8 0
mcl64k 65536 17 0 0 3 0 3 3 0
8 0
mcl16k 16384 17 0 0 3 0 3 3 0
8 1
mcl12k 12288 25 0 0 2 0 2 2 0
8 0
mcl9k 9216 21 0 0 2 0 2 2 0
8 0
mcl8k 8192 25 0 0 4 1 3 3 0
8 0
mcl4k 4096 17 0 0 3 0 3 3 0
8 0
mcl2k2 2112 7 0 0 1 0 1 1 0
8 0
mcl2k 2048 158 0 0 15 1 14 15 0
8 0
mtagpl 80 69 0 0 1 0 1 1 0
8 0
mbufpl 256 378 0 0 14 0 14 14 0
8 0
bufpl 256 17825 0 10777 441 0 441 441 0
8 0
anonpl 16 626334 0 614980 154 89 65 78 0
124 1
amapchunkpl 152 42480 0 42375 40 34 6 18 0
158 0
amappl16 192 34229 0 33340 116 70 46 55 0
8 1
amappl15 184 258 0 258 3 3 0 1 0
8 0
amappl14 176 1358 0 1354 2 1 1 1 0
8 0
amappl13 168 696 0 696 3 3 0 1 0
8 0
amappl12 160 1142 0 1140 4 3 1 1 0
8 0
amappl11 152 715 0 707 1 0 1 1 0
8 0
amappl10 144 2237 0 2233 1 0 1 1 0
8 0
amappl9 136 2020 0 2013 1 0 1 1 0
8 0
amappl8 128 1604 0 1562 2 0 2 2 0
8 0
amappl7 120 2341 0 2332 1 0 1 1 0
8 0
amappl6 112 721 0 701 1 0 1 1 0
8 0
amappl5 104 1427 0 1413 1 0 1 1 0
8 0
amappl4 96 7586 0 7555 1 0 1 1 0
8 0
amappl3 88 2373 0 2366 1 0 1 1 0
8 0
amappl2 80 60560 0 60484 4 2 2 3 0
8 0
amappl1 72 167892 0 167465 25 15 10 20 0
8 0
amappl 80 22996 0 22961 1 0 1 1 0
84 0
dma4096 4096 1 0 1 1 1 0 1 0
8 0
dma256 256 6 0 6 1 1 0 1 0
8 0
dma64 64 259 0 259 1 1 0 1 0
8 0
dma32 32 7 0 7 1 1 0 1 0
8 0
dma16 16 17 0 17 1 1 0 1 0
8 0
aobjpl 64 129 0 0 3 0 3 3 0
8 0
uaddrrnd 24 7797 0 7780 1 0 1 1 0
8 0
uaddrbest 32 2 0 0 1 0 1 1 0
8 0
uaddr 24 7797 0 7780 1 0 1 1 0
8 0
vmmpekpl 168 52060 0 52023 2 0 2 2 0
8 0
vmmpepl 168 934161 0 932084 337 216 121 121 0 357
29
vmsppl 368 7794 0 7780 2 0 2 2 0
8 0
pdppl 4096 15601 0 15564 8 3 5 6 0
8 0
pvpl 32 1740202 0 1725624 365 205 160 187 0
265 9
pmappl 232 7796 0 7782 4 3 1 2 0
8 0
extentpl 40 41 0 26 1 0 1 1 0
8 0
phpool 112 638 0 30 18 0 18 18 0
8 0
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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