panic:W ApRoNoINlG_:c acSPhLe_ NiOteT mL_OmWaEgRiEcD_ cOhNe cSkY:S CmbALuLf pl13 c7 p-u14 7fr16e8e ElXisITt m0 o9d
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syzbot
May 7, 2020, 11:30:17 PM5/7/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 30e1cf84 openssh-8.3; ok deraadt@
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=146c8842100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=9e5e2aec0f1b515b55be
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+9e5e2a...@syzkaller.appspotmail.com
panic:W ApRoNoINlG_:c acSPhLe_ NiOteT mL_OmWaEgRiEcD_ cOhNe cSkY:S CmbALuLf pl13 c7 p-u14 7fr16e8e ElXisITt m0 o9d
i
fiStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*470485 21675 0 0x2 0 0 syz-executor.1
189882 86935 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdc110, 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 0xfffffd806f173c00+16 0x0!=0x7f9090a5c9b2da30
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdc110, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff8000231899b0
rbx 0
rdx 0xffff800020e6d388
rcx 0
rax 0x39
r8 0xffffffff81ce7e0f kprintf+0x16f
r9 0x1
r10 0x25
r11 0x98710e6c37dcaaa8
r12 0
r13 0
r14 0xffff800020e6d388
r15 0
rip 0xffffffff81d693f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800023189930
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=470485 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=74, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6dd48,0xffff800020ec7af8
process=0xffff800020e80f70 user=0xffff800023184000, vmspace=0xfffffd807efff5c0
estcpu=36, cpticks=4, pctcpu=0.8
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
228 519643 0 0 3 0x14200 bored sosplice
825 309374 25411 0 3 0x80 nanosleep syz-executor.0
825 403529 25411 0 3 0x4000080 netcon syz-executor.0
825 225566 25411 0 3 0x4000080 fsleep syz-executor.0
*21675 470485 84532 0 7 0x2 syz-executor.1
25411 466891 84532 0 3 0x82 nanosleep syz-executor.0
84532 185648 81542 0 3 0x82 thrsleep syz-fuzzer
84532 209253 81542 0 3 0x4000082 nanosleep syz-fuzzer
84532 424888 81542 0 3 0x4000082 thrsleep syz-fuzzer
84532 248184 81542 0 3 0x4000082 thrsleep syz-fuzzer
84532 232786 81542 0 3 0x4000082 thrsleep syz-fuzzer
84532 269202 81542 0 3 0x4000082 thrsleep syz-fuzzer
84532 197923 81542 0 3 0x4000082 thrsleep syz-fuzzer
84532 481492 81542 0 3 0x4000082 kqread syz-fuzzer
84532 287836 81542 0 3 0x4000082 thrsleep syz-fuzzer
84532 398552 81542 0 3 0x4000082 thrsleep syz-fuzzer
81542 292346 86935 0 3 0x10008a pause ksh
86935 189882 98460 0 7 0x12 sshd
94958 521550 1 0 3 0x100083 ttyin getty
98460 101492 1 0 3 0x80 select sshd
21482 92341 42558 74 3 0x100092 bpf pflogd
42558 144382 1 0 3 0x80 netio pflogd
58263 371667 79686 73 3 0x100090 kqread syslogd
79686 11614 1 0 3 0x100082 netio syslogd
13801 318381 1 77 3 0x100090 poll dhclient
37288 234318 1 0 3 0x80 poll dhclient
99687 467288 0 0 3 0x14200 bored smr
8978 481562 0 0 3 0x14200 pgzero zerothread
92684 361478 0 0 3 0x14200 aiodoned aiodoned
12447 496741 0 0 3 0x14200 syncer update
28649 204969 0 0 3 0x14200 cleaner cleaner
86057 350588 0 0 3 0x14200 reaper reaper
76031 272811 0 0 3 0x14200 pgdaemon pagedaemon
35424 66676 0 0 3 0x14200 bored crynlk
31710 129890 0 0 3 0x14200 bored crypto
59113 406363 0 0 3 0x40014200 acpi0 acpi0
93105 332112 0 0 3 0x40014200 idle1
92055 377473 0 0 3 0x14200 bored softnet
32832 304811 0 0 3 0x14200 bored systqmp
47625 328756 0 0 3 0x14200 bored systq
77887 237822 0 0 3 0x40014200 bored softclock
79970 388029 0 0 3 0x40014200 idle0
1 481866 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &bq->bufq_mtx r = 0 (0xffff80000017ad68)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 bufq_dequeue+0x2c sys/kern/kern_bufq.c:199
#4 sdstart+0x9f sys/scsi/sd.c:683
#5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:404 [inline]
#5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:420
#6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#8 sdstrategy+0x187 sys/scsi/sd.c:585
#9 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#11 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#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:1355
#15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#18 Xsyscall+0x128
Process 21675 (syz-executor.1) thread 0xffff800020e6d388 (470485)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82662e18)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:435
#3 sleep_finish+0x113 sys/kern/kern_synch.c:418
#4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline]
#4 sleep_finish_all+0x32 sys/kern/kern_synch.c:393
#5 tsleep+0x1cc sys/kern/kern_synch.c:155
#6 biowait+0xa6 sys/kern/vfs_bio.c:1256
#7 bwrite+0x1e4 sys/kern/vfs_bio.c:765
#8 ufs_dirremove+0x291
#9 ufs_rmdir+0x247 sys/ufs/ufs/ufs_vnops.c:1328
#10 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#11 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806df2bc50)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vget+0x1c8 sys/kern/vfs_subr.c:671
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329
#8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#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:1853
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b3512b8)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#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:1853
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
exclusive mutex &bq->bufq_mtx r = 0 (0xffff80000017ad68)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 bufq_dequeue+0x2c sys/kern/kern_bufq.c:199
#4 sdstart+0x9f sys/scsi/sd.c:683
#5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:404 [inline]
#5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:420
#6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#8 sdstrategy+0x187 sys/scsi/sd.c:585
#9 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#11 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#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:1355
#15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#18 Xsyscall+0x128
Process 86935 (sshd) thread 0xffff800020ed1d50 (189882)
exclusive rwlock netlock r = 0 (0xffffffff824fd5a8)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 solock+0x5a sys/kern/uipc_socket2.c:282
#2 sosend+0x559 sys/kern/uipc_socket.c:537
#3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365
#4 sys_write+0x83 sys/kern/sys_generic.c:285
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#6 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9513 6412K 6937K 78643K 10936 0
pcb 13 8K 8K 78643K 37 0
rtable 105 3K 3K 78643K 210 0
ifaddr 65 13K 13K 78643K 71 0
counters 43 33K 33K 78643K 43 0
ioctlops 0 0K 4K 78643K 1471 0
iov 0 0K 16K 78643K 12 0
mount 1 1K 1K 78643K 1 0
vnodes 1222 77K 77K 78643K 1348 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 3 0
VM map 2 1K 1K 78643K 2 0
sem 7 0K 0K 78643K 8 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 5 13K 25K 78643K 105 0
proc 59 63K 83K 78643K 441 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 12 0
in_multi 46 2K 3K 78643K 64 0
ether_multi 1 0K 0K 78643K 7 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 31 148K 148K 78643K 31 0
exec 0 0K 1K 78643K 215 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 125 22K 23K 78643K 1271 0
UVM aobj 6 2K 2K 78643K 6 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 16 0
NDP 10 0K 0K 78643K 14 0
temp 90 3037K 3101K 78643K 8345 0
kqueue 3 4K 12K 78643K 9 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 6 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 25 0 23 1 0 1 1 0 8 0
rtentry 112 45 0 1 2 0 2 2 0 8 0
unpcb 120 61 0 51 1 0 1 1 0 8 0
syncache 264 6 0 6 2 1 1 1 0 8 1
tcpqe 32 364 0 364 1 0 1 1 0 8 1
tcpcb 544 50 0 45 1 0 1 1 0 8 0
inpcb 280 144 0 135 2 0 2 2 0 8 1
nd6 48 6 0 0 1 0 1 1 0 8 0
pffrag 232 1 0 1 1 0 1 1 0 482 1
pffrnode 88 1 0 1 1 0 1 1 0 8 1
pffrent 40 45 0 45 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 18 0 0 1 0 1 1 0 8 0
pfstkey 112 18 0 0 1 0 1 1 0 8 0
pfstate 328 18 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 256 188 0 0 12 0 12 12 0 8 0
art_table 32 189 0 0 2 0 2 2 0 8 0
art_node 16 44 0 4 1 0 1 1 0 8 0
semapl 112 6 0 1 1 0 1 1 0 8 0
shmpl 112 4 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1542 0 139 89 0 89 89 0 8 0
ffsino 272 1542 0 139 95 0 95 95 0 8 0
nchpl 144 1855 0 250 60 0 60 60 0 8 0
uvmvnodes 72 1690 0 0 31 0 31 31 0 8 0
vnodes 208 1690 0 0 89 0 89 89 0 8 0
namei 1024 5046 0 5046 1 0 1 1 0 8 1
percpumem 16 32 0 0 1 0 1 1 0 8 0
vmpool 560 2 0 2 1 0 1 1 0 8 1
scxspl 192 4966 0 4966 8 1 7 7 0 8 7
plimitpl 152 23 0 15 1 0 1 1 0 8 0
sigapl 424 321 0 289 4 0 4 4 0 8 0
futexpl 56 1340 0 1339 1 0 1 1 0 8 0
knotepl 112 67 0 48 1 0 1 1 0 8 0
kqueuepl 144 18 0 15 1 0 1 1 0 8 0
pipelkpl 48 79 0 69 1 0 1 1 0 8 0
pipepl 120 158 0 139 1 0 1 1 0 8 0
fdescpl 496 305 0 289 3 0 3 3 0 8 0
filepl 152 1699 0 1595 5 0 5 5 0 8 0
lockfpl 104 47 0 46 1 0 1 1 0 8 0
lockfspl 48 15 0 14 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 18 0 7 1 0 1 1 0 8 0
ucredpl 96 143 0 134 1 0 1 1 0 8 0
zombiepl 144 289 0 289 1 0 1 1 0 8 1
processpl 984 321 0 289 5 0 5 5 0 8 0
procpl 624 503 0 460 4 0 4 4 0 8 0
sosppl 128 1 0 0 1 0 1 1 0 8 0
sockpl 400 230 0 209 3 0 3 3 0 8 0
mcl64k 65536 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 7 0 0 1 0 1 1 0 8 0
mcl2k 2048 176 0 0 21 0 21 21 0 8 0
mtagpl 80 6 0 0 1 0 1 1 0 8 0
mbufpl 256 304 0 0 18 0 18 18 0 8 0
bufpl 280 3507 0 135 241 0 241 241 0 8 0
anonpl 16 43011 0 29541 61 1 60 60 0 124 5
amapchunkpl 152 1657 0 1517 11 0 11 11 0 158 4
amappl16 192 1123 0 408 37 0 37 37 0 8 1
amappl15 184 39 0 36 1 0 1 1 0 8 0
amappl14 176 58 0 52 1 0 1 1 0 8 0
amappl13 168 27 0 25 1 0 1 1 0 8 0
amappl12 160 48 0 41 1 0 1 1 0 8 0
amappl11 152 59 0 44 1 0 1 1 0 8 0
amappl10 144 17 0 13 1 0 1 1 0 8 0
amappl9 136 393 0 391 1 0 1 1 0 8 0
amappl8 128 354 0 320 2 0 2 2 0 8 0
amappl7 120 118 0 106 1 0 1 1 0 8 0
amappl6 112 29 0 25 1 0 1 1 0 8 0
amappl5 104 205 0 188 1 0 1 1 0 8 0
amappl4 96 485 0 456 1 0 1 1 0 8 0
amappl3 88 135 0 129 1 0 1 1 0 8 0
amappl2 80 1520 0 1447 2 0 2 2 0 8 0
amappl1 72 16673 0 16235 23 10 13 18 0 8 3
amappl 80 754 0 708 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 5 0 0 1 0 1 1 0 8 0
uaddrrnd 24 307 0 291 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 307 0 291 1 0 1 1 0 8 0
vmmpekpl 168 6387 0 6353 2 0 2 2 0 8 0
vmmpepl 168 44003 0 42129 108 6 102 102 0 357 16
vmsppl 368 306 0 291 2 0 2 2 0 8 0
pdppl 4096 622 0 582 6 0 6 6 0 8 0
pvpl 32 149516 0 132869 149 0 149 149 0 265 13
pmappl 232 306 0 291 2 0 2 2 0 8 1
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 263 0 3 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdc110, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821f7274) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821f7274) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82691c90,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000a0b320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eb384b8,9,fffffd807cc66b00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e8da40, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821f7274) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821f7274) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82691c90,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000a0b320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eb384b8,9,fffffd807cc66b00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55
sosend(fffffd806eb384b8,0,ffff800020e8db08,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020ed1d50,4,ffff800020e8db08,0,ffff800020e8dbf0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020ed1d50,ffff800020e8dba0,ffff800020e8dbf0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e8dc70) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e8dc70) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe2ae0, count: -19
---
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: 30e1cf84 openssh-8.3; ok deraadt@
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=146c8842100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=9e5e2aec0f1b515b55be
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+9e5e2a...@syzkaller.appspotmail.com
panic:W ApRoNoINlG_:c acSPhLe_ NiOteT mL_OmWaEgRiEcD_ cOhNe cSkY:S CmbALuLf pl13 c7 p-u14 7fr16e8e ElXisITt m0 o9d
i
fiStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*470485 21675 0 0x2 0 0 syz-executor.1
189882 86935 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdc110, 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 0xfffffd806f173c00+16 0x0!=0x7f9090a5c9b2da30
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdc110, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff8000231899b0
rbx 0
rdx 0xffff800020e6d388
rcx 0
rax 0x39
r8 0xffffffff81ce7e0f kprintf+0x16f
r9 0x1
r10 0x25
r11 0x98710e6c37dcaaa8
r12 0
r13 0
r14 0xffff800020e6d388
r15 0
rip 0xffffffff81d693f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800023189930
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=470485 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=74, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6dd48,0xffff800020ec7af8
process=0xffff800020e80f70 user=0xffff800023184000, vmspace=0xfffffd807efff5c0
estcpu=36, cpticks=4, pctcpu=0.8
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
228 519643 0 0 3 0x14200 bored sosplice
825 309374 25411 0 3 0x80 nanosleep syz-executor.0
825 403529 25411 0 3 0x4000080 netcon syz-executor.0
825 225566 25411 0 3 0x4000080 fsleep syz-executor.0
*21675 470485 84532 0 7 0x2 syz-executor.1
25411 466891 84532 0 3 0x82 nanosleep syz-executor.0
84532 185648 81542 0 3 0x82 thrsleep syz-fuzzer
84532 209253 81542 0 3 0x4000082 nanosleep syz-fuzzer
84532 424888 81542 0 3 0x4000082 thrsleep syz-fuzzer
84532 248184 81542 0 3 0x4000082 thrsleep syz-fuzzer
84532 232786 81542 0 3 0x4000082 thrsleep syz-fuzzer
84532 269202 81542 0 3 0x4000082 thrsleep syz-fuzzer
84532 197923 81542 0 3 0x4000082 thrsleep syz-fuzzer
84532 481492 81542 0 3 0x4000082 kqread syz-fuzzer
84532 287836 81542 0 3 0x4000082 thrsleep syz-fuzzer
84532 398552 81542 0 3 0x4000082 thrsleep syz-fuzzer
81542 292346 86935 0 3 0x10008a pause ksh
86935 189882 98460 0 7 0x12 sshd
94958 521550 1 0 3 0x100083 ttyin getty
98460 101492 1 0 3 0x80 select sshd
21482 92341 42558 74 3 0x100092 bpf pflogd
42558 144382 1 0 3 0x80 netio pflogd
58263 371667 79686 73 3 0x100090 kqread syslogd
79686 11614 1 0 3 0x100082 netio syslogd
13801 318381 1 77 3 0x100090 poll dhclient
37288 234318 1 0 3 0x80 poll dhclient
99687 467288 0 0 3 0x14200 bored smr
8978 481562 0 0 3 0x14200 pgzero zerothread
92684 361478 0 0 3 0x14200 aiodoned aiodoned
12447 496741 0 0 3 0x14200 syncer update
28649 204969 0 0 3 0x14200 cleaner cleaner
86057 350588 0 0 3 0x14200 reaper reaper
76031 272811 0 0 3 0x14200 pgdaemon pagedaemon
35424 66676 0 0 3 0x14200 bored crynlk
31710 129890 0 0 3 0x14200 bored crypto
59113 406363 0 0 3 0x40014200 acpi0 acpi0
93105 332112 0 0 3 0x40014200 idle1
92055 377473 0 0 3 0x14200 bored softnet
32832 304811 0 0 3 0x14200 bored systqmp
47625 328756 0 0 3 0x14200 bored systq
77887 237822 0 0 3 0x40014200 bored softclock
79970 388029 0 0 3 0x40014200 idle0
1 481866 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &bq->bufq_mtx r = 0 (0xffff80000017ad68)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 bufq_dequeue+0x2c sys/kern/kern_bufq.c:199
#4 sdstart+0x9f sys/scsi/sd.c:683
#5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:404 [inline]
#5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:420
#6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#8 sdstrategy+0x187 sys/scsi/sd.c:585
#9 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#11 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#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:1355
#15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#18 Xsyscall+0x128
Process 21675 (syz-executor.1) thread 0xffff800020e6d388 (470485)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82662e18)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:435
#3 sleep_finish+0x113 sys/kern/kern_synch.c:418
#4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline]
#4 sleep_finish_all+0x32 sys/kern/kern_synch.c:393
#5 tsleep+0x1cc sys/kern/kern_synch.c:155
#6 biowait+0xa6 sys/kern/vfs_bio.c:1256
#7 bwrite+0x1e4 sys/kern/vfs_bio.c:765
#8 ufs_dirremove+0x291
#9 ufs_rmdir+0x247 sys/ufs/ufs/ufs_vnops.c:1328
#10 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#11 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806df2bc50)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vget+0x1c8 sys/kern/vfs_subr.c:671
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329
#8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#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:1853
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b3512b8)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#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:1853
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
exclusive mutex &bq->bufq_mtx r = 0 (0xffff80000017ad68)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 bufq_dequeue+0x2c sys/kern/kern_bufq.c:199
#4 sdstart+0x9f sys/scsi/sd.c:683
#5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:404 [inline]
#5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:420
#6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#8 sdstrategy+0x187 sys/scsi/sd.c:585
#9 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#11 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#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:1355
#15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#18 Xsyscall+0x128
Process 86935 (sshd) thread 0xffff800020ed1d50 (189882)
exclusive rwlock netlock r = 0 (0xffffffff824fd5a8)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 solock+0x5a sys/kern/uipc_socket2.c:282
#2 sosend+0x559 sys/kern/uipc_socket.c:537
#3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365
#4 sys_write+0x83 sys/kern/sys_generic.c:285
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#6 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9513 6412K 6937K 78643K 10936 0
pcb 13 8K 8K 78643K 37 0
rtable 105 3K 3K 78643K 210 0
ifaddr 65 13K 13K 78643K 71 0
counters 43 33K 33K 78643K 43 0
ioctlops 0 0K 4K 78643K 1471 0
iov 0 0K 16K 78643K 12 0
mount 1 1K 1K 78643K 1 0
vnodes 1222 77K 77K 78643K 1348 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 3 0
VM map 2 1K 1K 78643K 2 0
sem 7 0K 0K 78643K 8 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 5 13K 25K 78643K 105 0
proc 59 63K 83K 78643K 441 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 12 0
in_multi 46 2K 3K 78643K 64 0
ether_multi 1 0K 0K 78643K 7 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 31 148K 148K 78643K 31 0
exec 0 0K 1K 78643K 215 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 125 22K 23K 78643K 1271 0
UVM aobj 6 2K 2K 78643K 6 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 16 0
NDP 10 0K 0K 78643K 14 0
temp 90 3037K 3101K 78643K 8345 0
kqueue 3 4K 12K 78643K 9 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 6 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 25 0 23 1 0 1 1 0 8 0
rtentry 112 45 0 1 2 0 2 2 0 8 0
unpcb 120 61 0 51 1 0 1 1 0 8 0
syncache 264 6 0 6 2 1 1 1 0 8 1
tcpqe 32 364 0 364 1 0 1 1 0 8 1
tcpcb 544 50 0 45 1 0 1 1 0 8 0
inpcb 280 144 0 135 2 0 2 2 0 8 1
nd6 48 6 0 0 1 0 1 1 0 8 0
pffrag 232 1 0 1 1 0 1 1 0 482 1
pffrnode 88 1 0 1 1 0 1 1 0 8 1
pffrent 40 45 0 45 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 18 0 0 1 0 1 1 0 8 0
pfstkey 112 18 0 0 1 0 1 1 0 8 0
pfstate 328 18 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 256 188 0 0 12 0 12 12 0 8 0
art_table 32 189 0 0 2 0 2 2 0 8 0
art_node 16 44 0 4 1 0 1 1 0 8 0
semapl 112 6 0 1 1 0 1 1 0 8 0
shmpl 112 4 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1542 0 139 89 0 89 89 0 8 0
ffsino 272 1542 0 139 95 0 95 95 0 8 0
nchpl 144 1855 0 250 60 0 60 60 0 8 0
uvmvnodes 72 1690 0 0 31 0 31 31 0 8 0
vnodes 208 1690 0 0 89 0 89 89 0 8 0
namei 1024 5046 0 5046 1 0 1 1 0 8 1
percpumem 16 32 0 0 1 0 1 1 0 8 0
vmpool 560 2 0 2 1 0 1 1 0 8 1
scxspl 192 4966 0 4966 8 1 7 7 0 8 7
plimitpl 152 23 0 15 1 0 1 1 0 8 0
sigapl 424 321 0 289 4 0 4 4 0 8 0
futexpl 56 1340 0 1339 1 0 1 1 0 8 0
knotepl 112 67 0 48 1 0 1 1 0 8 0
kqueuepl 144 18 0 15 1 0 1 1 0 8 0
pipelkpl 48 79 0 69 1 0 1 1 0 8 0
pipepl 120 158 0 139 1 0 1 1 0 8 0
fdescpl 496 305 0 289 3 0 3 3 0 8 0
filepl 152 1699 0 1595 5 0 5 5 0 8 0
lockfpl 104 47 0 46 1 0 1 1 0 8 0
lockfspl 48 15 0 14 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 18 0 7 1 0 1 1 0 8 0
ucredpl 96 143 0 134 1 0 1 1 0 8 0
zombiepl 144 289 0 289 1 0 1 1 0 8 1
processpl 984 321 0 289 5 0 5 5 0 8 0
procpl 624 503 0 460 4 0 4 4 0 8 0
sosppl 128 1 0 0 1 0 1 1 0 8 0
sockpl 400 230 0 209 3 0 3 3 0 8 0
mcl64k 65536 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 7 0 0 1 0 1 1 0 8 0
mcl2k 2048 176 0 0 21 0 21 21 0 8 0
mtagpl 80 6 0 0 1 0 1 1 0 8 0
mbufpl 256 304 0 0 18 0 18 18 0 8 0
bufpl 280 3507 0 135 241 0 241 241 0 8 0
anonpl 16 43011 0 29541 61 1 60 60 0 124 5
amapchunkpl 152 1657 0 1517 11 0 11 11 0 158 4
amappl16 192 1123 0 408 37 0 37 37 0 8 1
amappl15 184 39 0 36 1 0 1 1 0 8 0
amappl14 176 58 0 52 1 0 1 1 0 8 0
amappl13 168 27 0 25 1 0 1 1 0 8 0
amappl12 160 48 0 41 1 0 1 1 0 8 0
amappl11 152 59 0 44 1 0 1 1 0 8 0
amappl10 144 17 0 13 1 0 1 1 0 8 0
amappl9 136 393 0 391 1 0 1 1 0 8 0
amappl8 128 354 0 320 2 0 2 2 0 8 0
amappl7 120 118 0 106 1 0 1 1 0 8 0
amappl6 112 29 0 25 1 0 1 1 0 8 0
amappl5 104 205 0 188 1 0 1 1 0 8 0
amappl4 96 485 0 456 1 0 1 1 0 8 0
amappl3 88 135 0 129 1 0 1 1 0 8 0
amappl2 80 1520 0 1447 2 0 2 2 0 8 0
amappl1 72 16673 0 16235 23 10 13 18 0 8 3
amappl 80 754 0 708 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 5 0 0 1 0 1 1 0 8 0
uaddrrnd 24 307 0 291 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 307 0 291 1 0 1 1 0 8 0
vmmpekpl 168 6387 0 6353 2 0 2 2 0 8 0
vmmpepl 168 44003 0 42129 108 6 102 102 0 357 16
vmsppl 368 306 0 291 2 0 2 2 0 8 0
pdppl 4096 622 0 582 6 0 6 6 0 8 0
pvpl 32 149516 0 132869 149 0 149 149 0 265 13
pmappl 232 306 0 291 2 0 2 2 0 8 1
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 263 0 3 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdc110, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821f7274) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821f7274) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82691c90,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000a0b320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eb384b8,9,fffffd807cc66b00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e8da40, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821f7274) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821f7274) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82691c90,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000a0b320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eb384b8,9,fffffd807cc66b00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55
sosend(fffffd806eb384b8,0,ffff800020e8db08,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020ed1d50,4,ffff800020e8db08,0,ffff800020e8dbf0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020ed1d50,ffff800020e8dba0,ffff800020e8dbf0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e8dc70) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e8dc70) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe2ae0, count: -19
---
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Anton Lindqvist
May 8, 2020, 2:41:12 AM5/8/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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