panic: pWoAoRlN_IcNacGhe: _SiPtLe mN_mOTa giLOcWE_RcEhDe cOkN: SmbYSuCfApLlL cp1u37 fr-ee5 1l6i4st8 EmoXIdTif 0ie d9
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syzbot
Nov 23, 2019, 8:00:10 PM11/23/19
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 254679ff envy(4): *sleep(9) -> *sleep_nsec(9); ok ratchov@
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=10a347d2e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=26ca0a9c07f16a3a
dashboard link: https://syzkaller.appspot.com/bug?extid=9874b043b0f4e41ada40
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+9874b0...@syzkaller.appspotmail.com
login: oLoLpanic: pWoAoRlN_IcNacGhe: _SiPtLe mN_mOTa giLOcWE_RcEhDe cOkN:
SmbYSuCfApLlL cp1u37 fr-ee5 1l6i4st8 EmoXIdTif 0ie d9
:
iStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*288908 71305 0 0x2 0 0 syz-executor.0
266454 59823 0 0x14000 0x200 1 softnet
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff3630, count: 14
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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr
0xfffffd807f028e00+16 0x0!=0x23a117b19461a9f
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff3630, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020b63d50
rbx 0
rdx 0xffff800020ab0290
rcx 0
rax 0x38
r8 0xffffffff81bcb87f kprintf+0x16f
r9 0x1
r10 0x25
r11 0xa154fd809b049f63
r12 0
r13 0
r14 0xffff800020ab0290
r15 0
rip 0xffffffff8119f3f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020b63cd0
ss 0
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.0) pid=288908 stat=onproc
flags process=2<EXEC> proc=0
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020ab0018,0xffff800020ab0790
process=0xffff800020add500 user=0xffff800020b5e000,
vmspace=0xfffffd807f0085c0
estcpu=36, cpticks=1, pctcpu=0.4
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
23937 317612 0 0 3 0x14200 bored sosplice
65448 388480 23239 0 3 0x82 piperd syz-executor.1
*71305 288908 23239 0 7 0x2 syz-executor.0
23239 418456 65721 0 3 0x82 nanosleep syz-fuzzer
23239 184287 65721 0 3 0x4000082 nanosleep syz-fuzzer
23239 169733 65721 0 2 0x4000002 syz-fuzzer
23239 212810 65721 0 3 0x4000082 thrsleep syz-fuzzer
23239 483748 65721 0 3 0x4000082 thrsleep syz-fuzzer
23239 500490 65721 0 3 0x4000082 thrsleep syz-fuzzer
23239 153281 65721 0 3 0x4000082 thrsleep syz-fuzzer
23239 91401 65721 0 3 0x4000082 thrsleep syz-fuzzer
23239 514689 65721 0 3 0x4000082 kqread syz-fuzzer
23239 163984 65721 0 3 0x4000082 thrsleep syz-fuzzer
65721 54433 76989 0 3 0x10008a pause ksh
76989 394278 99576 0 2 0x12 sshd
48695 80324 1 0 3 0x100083 ttyin getty
99576 87432 1 0 3 0x80 select sshd
52677 253107 13145 74 3 0x100092 bpf pflogd
13145 310200 1 0 3 0x80 netio pflogd
118 22881 57910 73 3 0x100090 kqread syslogd
57910 193698 1 0 3 0x100082 netio syslogd
49882 12664 1 77 3 0x100090 poll dhclient
14513 414699 1 0 3 0x80 poll dhclient
68942 455860 0 0 2 0x14200 zerothread
31331 68272 0 0 3 0x14200 aiodoned aiodoned
57831 330322 0 0 3 0x14200 syncer update
25720 445460 0 0 3 0x14200 cleaner cleaner
77474 118629 0 0 3 0x14200 reaper reaper
46573 213865 0 0 3 0x14200 pgdaemon pagedaemon
26110 492944 0 0 3 0x14200 bored crynlk
4487 147975 0 0 3 0x14200 bored crypto
4203 73311 0 0 3 0x40014200 acpi0 acpi0
15914 413450 0 0 3 0x40014200 idle1
59823 266454 0 0 7 0x14200 softnet
91417 315026 0 0 3 0x14200 bored systqmp
29603 247473 0 0 3 0x14200 bored systq
85003 391989 0 0 3 0x40014200 bored softclock
99298 207568 0 0 3 0x40014200 idle0
63528 341123 0 0 3 0x14200 bored smr
1 31447 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &diskp->dk_mtx r = 0 (0xffff800000172898)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 disk_busy+0x21 sys/kern/subr_disk.c:1235
#4 sdstart+0x3dc sys/scsi/sd.c:711
#5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:394 [inline]
#5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:410
#6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:586
#7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:525
#8 sdstrategy+0x187 sys/scsi/sd.c:582
#9 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:727
#11 bwrite+0x1b9 sys/kern/vfs_bio.c:738
#12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#13 ffs_truncate+0xc76
#14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357
#15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818
#17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#18 Xsyscall+0x128
Process 71305 (syz-executor.0) thread 0xffff800020ab0290 (288908)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826346d0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:434
#3 sleep_finish+0x113 sys/kern/kern_synch.c:374
#4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:403
[inline]
#4 sleep_finish_all+0x32 sys/kern/kern_synch.c:183
#5 tsleep+0x1cf sys/kern/kern_synch.c:153
#6 biowait+0xa1 sys/kern/vfs_bio.c:1231
#7 bwrite+0x1e4 sys/kern/vfs_bio.c:747
#8 ufs_dirremove+0x291
#9 ufs_rmdir+0x247 sys/ufs/ufs/ufs_vnops.c:1330
#10 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#11 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806e7845e8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:451
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:571
#5 vget+0x1c3 sys/kern/vfs_subr.c:672
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1323
#8 ufs_lookup+0x14b4 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91
#10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#11 namei+0x63c sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80691c11a8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:451
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:571
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#9 Xsyscall+0x128
exclusive mutex &diskp->dk_mtx r = 0 (0xffff800000172898)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 disk_busy+0x21 sys/kern/subr_disk.c:1235
#4 sdstart+0x3dc sys/scsi/sd.c:711
#5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:394 [inline]
#5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:410
#6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:586
#7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:525
#8 sdstrategy+0x187 sys/scsi/sd.c:582
#9 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:727
#11 bwrite+0x1b9 sys/kern/vfs_bio.c:738
#12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#13 ffs_truncate+0xc76
#14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357
#15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818
#17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#18 Xsyscall+0x128
Process 59823 (softnet) thread 0xffff800020a10000 (266454)
shared rwlock netlock r = 0 (0xffffffff8250a038)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 if_input_process+0x84 sys/net/if.c:942
#2 ifiq_process+0x80 sys/net/ifq.c:607
#3 taskq_thread+0x9c sys/kern/kern_task.c:368
#4 proc_trampoline+0x1c
shared rwlock softnet r = 0 (0xffff8000000230e0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 taskq_thread+0x8f sys/kern/kern_task.c:367
#2 proc_trampoline+0x1c
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9503 6417K 7055K 78643K 10919 0 0
pcb 13 8K 8K 78643K 44 0 0
rtable 105 4K 4K 78643K 290 0 0
ifaddr 62 12K 13K 78643K 90 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1473 0 0
iov 0 0K 16K 78643K 27 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1221 77K 77K 78643K 1337 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 4 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 12 0K 1K 78643K 74 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1809 196K 290K 78643K 12766 0 0
file desc 4 9K 25K 78643K 151 0 0
sigio 0 0K 0K 78643K 8 0 0
proc 60 63K 83K 78643K 446 0 0
subproc 32 2K 2K 78643K 34 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
in_multi 36 2K 2K 78643K 52 0 0
ether_multi 1 0K 0K 78643K 1 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 42 185K 185K 78643K 42 0 0
exec 0 0K 1K 78643K 224 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 106 21K 24K 78643K 1453 0 0
UVM aobj 30 2K 2K 78643K 30 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 1K 78643K 49 0 0
NDP 10 0K 0K 78643K 19 0 0
temp 114 3551K 3617K 78643K 4023 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg
Idle
arp 64 9 0 3 1 0 1 1 0
8 0
plcache 128 20 0 0 1 0 1 1 0
8 0
rtpcb 80 29 0 27 1 0 1 1 0
8 0
rtentry 112 62 0 21 2 0 2 2 0
8 0
unpcb 120 123 0 113 1 0 1 1 0
8 0
syncache 264 4 0 4 1 1 0 1 0
8 0
tcpqe 32 16 0 16 1 1 0 1 0
8 0
tcpcb 544 57 0 53 1 0 1 1 0
8 0
inpcb 280 442 0 435 3 0 3 3 0
8 2
nd6 48 7 0 4 1 0 1 1 0
8 0
pkpcb 40 2 0 2 1 0 1 1 0
8 1
ppxss 1128 3 0 3 1 0 1 1 0
8 1
pffrag 232 5 0 5 1 0 1 1 0
482 1
pffrnode 88 5 0 5 1 0 1 1 0
8 1
pffrent 40 141 0 141 1 0 1 1 0
8 1
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 20 0 0 1 0 1 1 0
8 0
pfstkey 112 20 0 0 1 0 1 1 0
8 0
pfstate 328 20 0 0 2 0 2 2 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 256 270 0 69 14 1 13 14 0
8 0
art_table 32 271 0 69 2 0 2 2 0
8 0
art_node 16 60 0 23 1 0 1 1 0
8 0
sysvmsgpl 40 51 0 38 1 0 1 1 0
8 0
semupl 112 3 0 3 1 1 0 1 0
8 0
semapl 112 72 0 62 1 0 1 1 0
8 0
shmpl 112 28 0 0 1 0 1 1 0
8 0
dirhash 1024 17 0 0 3 0 3 3 0
8 0
dino1pl 128 1634 0 231 46 0 46 46 0
8 0
ffsino 272 1634 0 231 94 0 94 94 0
8 0
nchpl 144 2055 0 443 61 0 61 61 0
8 0
uvmvnodes 72 1754 0 0 32 0 32 32 0
8 0
vnodes 208 1754 0 0 93 0 93 93 0
8 0
namei 1024 6193 0 6193 1 0 1 1 0
8 1
percpumem 16 30 0 0 1 0 1 1 0
8 0
scxspl 192 6083 0 6083 8 1 7 7 0
8 7
plimitpl 152 33 0 25 1 0 1 1 0
8 0
sigapl 432 349 0 335 3 1 2 3 0
8 0
futexpl 56 3596 0 3596 1 0 1 1 0
8 1
knotepl 112 66 0 47 1 0 1 1 0
8 0
kqueuepl 104 28 0 26 1 0 1 1 0
8 0
pipepl 160 252 0 233 2 0 2 2 0
8 1
fdescpl 488 350 0 335 3 0 3 3 0
8 0
filepl 152 2590 0 2490 6 0 6 6 0
8 2
lockfpl 104 41 0 40 1 0 1 1 0
8 0
lockfspl 48 17 0 16 1 0 1 1 0
8 0
sessionpl 112 18 0 7 1 0 1 1 0
8 0
pgrppl 48 26 0 15 1 0 1 1 0
8 0
ucredpl 96 399 0 390 1 0 1 1 0
8 0
zombiepl 144 335 0 335 1 0 1 1 0
8 1
processpl 896 366 0 335 4 0 4 4 0
8 0
procpl 632 685 0 645 5 0 5 5 0
8 1
sosppl 128 53 0 53 1 0 1 1 0
8 1
sockpl 384 609 0 590 5 0 5 5 0
8 3
mcl64k 65536 9 0 0 2 0 2 2 0
8 0
mcl16k 16384 1 0 0 1 0 1 1 0
8 0
mcl12k 12288 6 0 0 1 0 1 1 0
8 0
mcl9k 9216 2 0 0 1 0 1 1 0
8 0
mcl8k 8192 3 0 0 1 0 1 1 0
8 0
mcl4k 4096 8 0 0 1 0 1 1 0
8 0
mcl2k 2048 137 0 0 18 0 18 18 0
8 1
mtagpl 80 14 0 0 1 0 1 1 0
8 0
mbufpl 256 282 0 0 18 0 18 18 0
8 0
bufpl 256 6844 0 1312 346 0 346 346 0
8 0
anonpl 16 51522 0 31182 84 1 83 83 0
124 0
amapchunkpl 152 2193 0 2041 14 0 14 14 0
158 6
amappl16 192 1749 0 624 57 0 57 57 0
8 0
amappl14 176 112 0 105 1 0 1 1 0
8 0
amappl13 168 1 0 1 1 0 1 1 0
8 1
amappl12 160 63 0 60 1 0 1 1 0
8 0
amappl11 152 55 0 40 1 0 1 1 0
8 0
amappl10 144 31 0 23 1 0 1 1 0
8 0
amappl9 136 603 0 599 1 0 1 1 0
8 0
amappl8 128 170 0 145 1 0 1 1 0
8 0
amappl7 120 38 0 34 1 0 1 1 0
8 0
amappl6 112 60 0 49 1 0 1 1 0
8 0
amappl5 104 193 0 179 1 0 1 1 0
8 0
amappl4 96 597 0 570 1 0 1 1 0
8 0
amappl3 88 180 0 173 1 0 1 1 0
8 0
amappl2 80 1887 0 1821 3 1 2 3 0
8 0
amappl1 72 17484 0 17063 26 16 10 20 0
8 0
amappl 80 943 0 899 2 0 2 2 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
dma128 128 253 0 253 1 1 0 1 0
8 0
dma64 64 6 0 6 1 1 0 1 0
8 0
dma32 32 7 0 7 1 1 0 1 0
8 0
dma16 16 18 0 17 1 0 1 1 0
8 0
aobjpl 64 29 0 0 1 0 1 1 0
8 0
uaddrrnd 24 350 0 335 1 0 1 1 0
8 0
uaddrbest 32 2 0 0 1 0 1 1 0
8 0
uaddr 24 350 0 335 1 0 1 1 0
8 0
vmmpekpl 168 6911 0 6879 2 0 2 2 0
8 0
vmmpepl 168 50510 0 48341 144 11 133 137 0 357
32
vmsppl 368 349 0 335 2 0 2 2 0
8 0
pdppl 4096 707 0 670 6 0 6 6 0
8 1
pvpl 32 170503 0 147026 196 0 196 196 0
265 3
pmappl 232 349 0 335 2 1 1 2 0
8 0
extentpl 40 46 0 29 1 0 1 1 0
8 0
phpool 112 513 0 4 15 0 15 15 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: 254679ff envy(4): *sleep(9) -> *sleep_nsec(9); ok ratchov@
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=10a347d2e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=26ca0a9c07f16a3a
dashboard link: https://syzkaller.appspot.com/bug?extid=9874b043b0f4e41ada40
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+9874b0...@syzkaller.appspotmail.com
login: oLoLpanic: pWoAoRlN_IcNacGhe: _SiPtLe mN_mOTa giLOcWE_RcEhDe cOkN:
SmbYSuCfApLlL cp1u37 fr-ee5 1l6i4st8 EmoXIdTif 0ie d9
:
iStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*288908 71305 0 0x2 0 0 syz-executor.0
266454 59823 0 0x14000 0x200 1 softnet
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff3630, count: 14
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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr
0xfffffd807f028e00+16 0x0!=0x23a117b19461a9f
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff3630, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020b63d50
rbx 0
rdx 0xffff800020ab0290
rcx 0
rax 0x38
r8 0xffffffff81bcb87f kprintf+0x16f
r9 0x1
r10 0x25
r11 0xa154fd809b049f63
r12 0
r13 0
r14 0xffff800020ab0290
r15 0
rip 0xffffffff8119f3f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020b63cd0
ss 0
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.0) pid=288908 stat=onproc
flags process=2<EXEC> proc=0
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020ab0018,0xffff800020ab0790
process=0xffff800020add500 user=0xffff800020b5e000,
vmspace=0xfffffd807f0085c0
estcpu=36, cpticks=1, pctcpu=0.4
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
23937 317612 0 0 3 0x14200 bored sosplice
65448 388480 23239 0 3 0x82 piperd syz-executor.1
*71305 288908 23239 0 7 0x2 syz-executor.0
23239 418456 65721 0 3 0x82 nanosleep syz-fuzzer
23239 184287 65721 0 3 0x4000082 nanosleep syz-fuzzer
23239 169733 65721 0 2 0x4000002 syz-fuzzer
23239 212810 65721 0 3 0x4000082 thrsleep syz-fuzzer
23239 483748 65721 0 3 0x4000082 thrsleep syz-fuzzer
23239 500490 65721 0 3 0x4000082 thrsleep syz-fuzzer
23239 153281 65721 0 3 0x4000082 thrsleep syz-fuzzer
23239 91401 65721 0 3 0x4000082 thrsleep syz-fuzzer
23239 514689 65721 0 3 0x4000082 kqread syz-fuzzer
23239 163984 65721 0 3 0x4000082 thrsleep syz-fuzzer
65721 54433 76989 0 3 0x10008a pause ksh
76989 394278 99576 0 2 0x12 sshd
48695 80324 1 0 3 0x100083 ttyin getty
99576 87432 1 0 3 0x80 select sshd
52677 253107 13145 74 3 0x100092 bpf pflogd
13145 310200 1 0 3 0x80 netio pflogd
118 22881 57910 73 3 0x100090 kqread syslogd
57910 193698 1 0 3 0x100082 netio syslogd
49882 12664 1 77 3 0x100090 poll dhclient
14513 414699 1 0 3 0x80 poll dhclient
68942 455860 0 0 2 0x14200 zerothread
31331 68272 0 0 3 0x14200 aiodoned aiodoned
57831 330322 0 0 3 0x14200 syncer update
25720 445460 0 0 3 0x14200 cleaner cleaner
77474 118629 0 0 3 0x14200 reaper reaper
46573 213865 0 0 3 0x14200 pgdaemon pagedaemon
26110 492944 0 0 3 0x14200 bored crynlk
4487 147975 0 0 3 0x14200 bored crypto
4203 73311 0 0 3 0x40014200 acpi0 acpi0
15914 413450 0 0 3 0x40014200 idle1
59823 266454 0 0 7 0x14200 softnet
91417 315026 0 0 3 0x14200 bored systqmp
29603 247473 0 0 3 0x14200 bored systq
85003 391989 0 0 3 0x40014200 bored softclock
99298 207568 0 0 3 0x40014200 idle0
63528 341123 0 0 3 0x14200 bored smr
1 31447 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &diskp->dk_mtx r = 0 (0xffff800000172898)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 disk_busy+0x21 sys/kern/subr_disk.c:1235
#4 sdstart+0x3dc sys/scsi/sd.c:711
#5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:394 [inline]
#5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:410
#6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:586
#7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:525
#8 sdstrategy+0x187 sys/scsi/sd.c:582
#9 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:727
#11 bwrite+0x1b9 sys/kern/vfs_bio.c:738
#12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#13 ffs_truncate+0xc76
#14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357
#15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818
#17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#18 Xsyscall+0x128
Process 71305 (syz-executor.0) thread 0xffff800020ab0290 (288908)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826346d0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:434
#3 sleep_finish+0x113 sys/kern/kern_synch.c:374
#4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:403
[inline]
#4 sleep_finish_all+0x32 sys/kern/kern_synch.c:183
#5 tsleep+0x1cf sys/kern/kern_synch.c:153
#6 biowait+0xa1 sys/kern/vfs_bio.c:1231
#7 bwrite+0x1e4 sys/kern/vfs_bio.c:747
#8 ufs_dirremove+0x291
#9 ufs_rmdir+0x247 sys/ufs/ufs/ufs_vnops.c:1330
#10 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#11 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806e7845e8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:451
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:571
#5 vget+0x1c3 sys/kern/vfs_subr.c:672
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1323
#8 ufs_lookup+0x14b4 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91
#10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#11 namei+0x63c sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80691c11a8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:451
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:571
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#9 Xsyscall+0x128
exclusive mutex &diskp->dk_mtx r = 0 (0xffff800000172898)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 disk_busy+0x21 sys/kern/subr_disk.c:1235
#4 sdstart+0x3dc sys/scsi/sd.c:711
#5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:394 [inline]
#5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:410
#6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:586
#7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:525
#8 sdstrategy+0x187 sys/scsi/sd.c:582
#9 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:727
#11 bwrite+0x1b9 sys/kern/vfs_bio.c:738
#12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#13 ffs_truncate+0xc76
#14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357
#15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818
#17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#18 Xsyscall+0x128
Process 59823 (softnet) thread 0xffff800020a10000 (266454)
shared rwlock netlock r = 0 (0xffffffff8250a038)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 if_input_process+0x84 sys/net/if.c:942
#2 ifiq_process+0x80 sys/net/ifq.c:607
#3 taskq_thread+0x9c sys/kern/kern_task.c:368
#4 proc_trampoline+0x1c
shared rwlock softnet r = 0 (0xffff8000000230e0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 taskq_thread+0x8f sys/kern/kern_task.c:367
#2 proc_trampoline+0x1c
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9503 6417K 7055K 78643K 10919 0 0
pcb 13 8K 8K 78643K 44 0 0
rtable 105 4K 4K 78643K 290 0 0
ifaddr 62 12K 13K 78643K 90 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1473 0 0
iov 0 0K 16K 78643K 27 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1221 77K 77K 78643K 1337 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 4 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 12 0K 1K 78643K 74 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1809 196K 290K 78643K 12766 0 0
file desc 4 9K 25K 78643K 151 0 0
sigio 0 0K 0K 78643K 8 0 0
proc 60 63K 83K 78643K 446 0 0
subproc 32 2K 2K 78643K 34 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
in_multi 36 2K 2K 78643K 52 0 0
ether_multi 1 0K 0K 78643K 1 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 42 185K 185K 78643K 42 0 0
exec 0 0K 1K 78643K 224 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 106 21K 24K 78643K 1453 0 0
UVM aobj 30 2K 2K 78643K 30 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 1K 78643K 49 0 0
NDP 10 0K 0K 78643K 19 0 0
temp 114 3551K 3617K 78643K 4023 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg
Idle
arp 64 9 0 3 1 0 1 1 0
8 0
plcache 128 20 0 0 1 0 1 1 0
8 0
rtpcb 80 29 0 27 1 0 1 1 0
8 0
rtentry 112 62 0 21 2 0 2 2 0
8 0
unpcb 120 123 0 113 1 0 1 1 0
8 0
syncache 264 4 0 4 1 1 0 1 0
8 0
tcpqe 32 16 0 16 1 1 0 1 0
8 0
tcpcb 544 57 0 53 1 0 1 1 0
8 0
inpcb 280 442 0 435 3 0 3 3 0
8 2
nd6 48 7 0 4 1 0 1 1 0
8 0
pkpcb 40 2 0 2 1 0 1 1 0
8 1
ppxss 1128 3 0 3 1 0 1 1 0
8 1
pffrag 232 5 0 5 1 0 1 1 0
482 1
pffrnode 88 5 0 5 1 0 1 1 0
8 1
pffrent 40 141 0 141 1 0 1 1 0
8 1
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 20 0 0 1 0 1 1 0
8 0
pfstkey 112 20 0 0 1 0 1 1 0
8 0
pfstate 328 20 0 0 2 0 2 2 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 256 270 0 69 14 1 13 14 0
8 0
art_table 32 271 0 69 2 0 2 2 0
8 0
art_node 16 60 0 23 1 0 1 1 0
8 0
sysvmsgpl 40 51 0 38 1 0 1 1 0
8 0
semupl 112 3 0 3 1 1 0 1 0
8 0
semapl 112 72 0 62 1 0 1 1 0
8 0
shmpl 112 28 0 0 1 0 1 1 0
8 0
dirhash 1024 17 0 0 3 0 3 3 0
8 0
dino1pl 128 1634 0 231 46 0 46 46 0
8 0
ffsino 272 1634 0 231 94 0 94 94 0
8 0
nchpl 144 2055 0 443 61 0 61 61 0
8 0
uvmvnodes 72 1754 0 0 32 0 32 32 0
8 0
vnodes 208 1754 0 0 93 0 93 93 0
8 0
namei 1024 6193 0 6193 1 0 1 1 0
8 1
percpumem 16 30 0 0 1 0 1 1 0
8 0
scxspl 192 6083 0 6083 8 1 7 7 0
8 7
plimitpl 152 33 0 25 1 0 1 1 0
8 0
sigapl 432 349 0 335 3 1 2 3 0
8 0
futexpl 56 3596 0 3596 1 0 1 1 0
8 1
knotepl 112 66 0 47 1 0 1 1 0
8 0
kqueuepl 104 28 0 26 1 0 1 1 0
8 0
pipepl 160 252 0 233 2 0 2 2 0
8 1
fdescpl 488 350 0 335 3 0 3 3 0
8 0
filepl 152 2590 0 2490 6 0 6 6 0
8 2
lockfpl 104 41 0 40 1 0 1 1 0
8 0
lockfspl 48 17 0 16 1 0 1 1 0
8 0
sessionpl 112 18 0 7 1 0 1 1 0
8 0
pgrppl 48 26 0 15 1 0 1 1 0
8 0
ucredpl 96 399 0 390 1 0 1 1 0
8 0
zombiepl 144 335 0 335 1 0 1 1 0
8 1
processpl 896 366 0 335 4 0 4 4 0
8 0
procpl 632 685 0 645 5 0 5 5 0
8 1
sosppl 128 53 0 53 1 0 1 1 0
8 1
sockpl 384 609 0 590 5 0 5 5 0
8 3
mcl64k 65536 9 0 0 2 0 2 2 0
8 0
mcl16k 16384 1 0 0 1 0 1 1 0
8 0
mcl12k 12288 6 0 0 1 0 1 1 0
8 0
mcl9k 9216 2 0 0 1 0 1 1 0
8 0
mcl8k 8192 3 0 0 1 0 1 1 0
8 0
mcl4k 4096 8 0 0 1 0 1 1 0
8 0
mcl2k 2048 137 0 0 18 0 18 18 0
8 1
mtagpl 80 14 0 0 1 0 1 1 0
8 0
mbufpl 256 282 0 0 18 0 18 18 0
8 0
bufpl 256 6844 0 1312 346 0 346 346 0
8 0
anonpl 16 51522 0 31182 84 1 83 83 0
124 0
amapchunkpl 152 2193 0 2041 14 0 14 14 0
158 6
amappl16 192 1749 0 624 57 0 57 57 0
8 0
amappl14 176 112 0 105 1 0 1 1 0
8 0
amappl13 168 1 0 1 1 0 1 1 0
8 1
amappl12 160 63 0 60 1 0 1 1 0
8 0
amappl11 152 55 0 40 1 0 1 1 0
8 0
amappl10 144 31 0 23 1 0 1 1 0
8 0
amappl9 136 603 0 599 1 0 1 1 0
8 0
amappl8 128 170 0 145 1 0 1 1 0
8 0
amappl7 120 38 0 34 1 0 1 1 0
8 0
amappl6 112 60 0 49 1 0 1 1 0
8 0
amappl5 104 193 0 179 1 0 1 1 0
8 0
amappl4 96 597 0 570 1 0 1 1 0
8 0
amappl3 88 180 0 173 1 0 1 1 0
8 0
amappl2 80 1887 0 1821 3 1 2 3 0
8 0
amappl1 72 17484 0 17063 26 16 10 20 0
8 0
amappl 80 943 0 899 2 0 2 2 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
dma128 128 253 0 253 1 1 0 1 0
8 0
dma64 64 6 0 6 1 1 0 1 0
8 0
dma32 32 7 0 7 1 1 0 1 0
8 0
dma16 16 18 0 17 1 0 1 1 0
8 0
aobjpl 64 29 0 0 1 0 1 1 0
8 0
uaddrrnd 24 350 0 335 1 0 1 1 0
8 0
uaddrbest 32 2 0 0 1 0 1 1 0
8 0
uaddr 24 350 0 335 1 0 1 1 0
8 0
vmmpekpl 168 6911 0 6879 2 0 2 2 0
8 0
vmmpepl 168 50510 0 48341 144 11 133 137 0 357
32
vmsppl 368 349 0 335 2 0 2 2 0
8 0
pdppl 4096 707 0 670 6 0 6 6 0
8 1
pvpl 32 170503 0 147026 196 0 196 196 0
265 3
pmappl 232 349 0 335 2 1 1 2 0
8 0
extentpl 40 46 0 29 1 0 1 1 0
8 0
phpool 112 513 0 4 15 0 15 15 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.
Anton Lindqvist
Nov 24, 2019, 4:08:14 AM11/24/19
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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