witness: lock_object uninitialized: ADDR (4)
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syzbot
Sep 26, 2025, 7:24:28 PMSep 26
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 0383cd21a234 Decrease mp->tm_nodes_cnt in the tmpfs_node_g..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=17643142580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=a9fae5148a3cd88f1532
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/377eac4fa7ae/disk-0383cd21.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/1a04bae9385b/bsd-0383cd21.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f1e2a4faf0ff/kernel-0383cd21.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a9fae5...@syzkaller.appspotmail.com
witness: lock_object uninitialized: 0xffff80003c475950
Starting stack trace...
witness_checkorder(ffff80003c475950,9,0) at witness_checkorder+0x1a7 witness_debugger sys/kern/subr_witness.c:2573 [inline]
witness_checkorder(ffff80003c475950,9,0) at witness_checkorder+0x1a7 sys/kern/subr_witness.c:783
mtx_enter(ffff80003c475940) at mtx_enter+0x4a sys/kern/kern_lock.c:260
filt_procdetach(fffffd805cddb438) at filt_procdetach+0x4d sys/kern/kern_event.c:432
knote_remove(ffff8000fffee7e0,fffffd806eeebd20,fffffd806eeebdc0,35,1) at knote_remove+0x2db sys/kern/kern_event.c:-1
kqueue_purge(ffff8000fffee7e0,fffffd806eeebd20) at kqueue_purge+0x137 sys/kern/kern_event.c:1890
kqueue_close(fffffd8067c7d180,ffff8000fffee7e0) at kqueue_close+0x48 sys/kern/kern_event.c:1934
fdrop(fffffd8067c7d180,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd8067c7d180,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1264
fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1195
exit1(ffff8000fffee7e0,0,0,3) at exit1+0x576 sys/kern/kern_exit.c:215
proc_suspend_check_locked(ffff8000fffee7e0,0) at proc_suspend_check_locked+0x2fd sys/kern/kern_sig.c:2235
userret(ffff8000fffee7e0) at userret+0x8c proc_suspend_check sys/kern/kern_sig.c:-1 [inline]
userret(ffff8000fffee7e0) at userret+0x8c sys/kern/kern_sig.c:2194
syscall(ffff80003c46f810) at syscall+0x9cd mi_syscall_return sys/sys/syscall_mi.h:203 [inline]
syscall(ffff80003c46f810) at syscall+0x9cd sys/arch/amd64/amd64/trap.c:769
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73f45f9ab7e0, count: 243
End of stack trace.
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
the kernel did not panic
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffff80003c475950,9,0) at witness_checkorder+0x1ac sys/kern/subr_witness.c:-1
mtx_enter(ffff80003c475940) at mtx_enter+0x4a sys/kern/kern_lock.c:260
filt_procdetach(fffffd805cddb438) at filt_procdetach+0x4d sys/kern/kern_event.c:432
knote_remove(ffff8000fffee7e0,fffffd806eeebd20,fffffd806eeebdc0,35,1) at knote_remove+0x2db sys/kern/kern_event.c:-1
kqueue_purge(ffff8000fffee7e0,fffffd806eeebd20) at kqueue_purge+0x137 sys/kern/kern_event.c:1890
kqueue_close(fffffd8067c7d180,ffff8000fffee7e0) at kqueue_close+0x48 sys/kern/kern_event.c:1934
fdrop(fffffd8067c7d180,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd8067c7d180,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1264
fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1195
exit1(ffff8000fffee7e0,0,0,3) at exit1+0x576 sys/kern/kern_exit.c:215
proc_suspend_check_locked(ffff8000fffee7e0,0) at proc_suspend_check_locked+0x2fd sys/kern/kern_sig.c:2235
userret(ffff8000fffee7e0) at userret+0x8c proc_suspend_check sys/kern/kern_sig.c:-1 [inline]
userret(ffff8000fffee7e0) at userret+0x8c sys/kern/kern_sig.c:2194
syscall(ffff80003c46f810) at syscall+0x9cd mi_syscall_return sys/sys/syscall_mi.h:203 [inline]
syscall(ffff80003c46f810) at syscall+0x9cd sys/arch/amd64/amd64/trap.c:769
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73f45f9ab7e0, count: -15
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80003c46f270
rbx 0
rdx 0
rcx 0xffff8000fffee7e0
rax 0xffff8000299edff0
r8 0xffff80003c46f210
r9 0x8080808080808080
r10 0x9f90e06d9d0ae000
r11 0x25a7fb9c7b600ca7
r12 0xffffffff834730fe user_filtops+0x6
r13 0x9
r14 0xffff80003c475950
r15 0x3
rip 0xffffffff823471f5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80003c46f260
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=325267 pid=79579 tcnt=0 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=82000<WEXIT,SUSPSINGLE>
runpri=32, usrpri=81, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff8000fffeefa8 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff80003c450038,0xffff8000fffee558
process=0xffff80002a3d1358 user=0xffff80003c46a000, vmspace=0xfffffd8072f4d9a8
estcpu=31, cpticks=20, pctcpu=0.2, user=0, sys=16, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
40543 387741 43344 0 3 0x80 fsleep syz-executor
40543 163694 43344 0 3 0x4000080 ttyopn syz-executor
82097 225734 36147 0 3 0x80 fsleep syz-executor
82097 245392 36147 0 3 0x4000080 bell syz-executor
82272 419087 86167 0 3 0x80 fsleep syz-executor
82272 239918 86167 0 3 0x4000080 ttyin syz-executor
50640 493973 83324 0 3 0x80 fsleep syz-executor
50640 300533 83324 0 3 0x4000080 semwait syz-executor
42341 368450 46117 0 3 0x80 fsleep syz-executor
42341 454078 46117 0 3 0x4000080 kqsel syz-executor
31984 209624 93650 0 3 0x80 fsleep syz-executor
31984 126852 93650 0 3 0x4000080 ttyin syz-executor
53197 217080 45009 0 3 0x82 nanoslp syz-executor
49043 392542 1 0 3 0x100083 ttyin getty
61044 16360 0 0 3 0x14200 bored sosplice
36147 317089 45009 0 3 0x82 nanoslp syz-executor
86167 127311 45009 0 3 0x82 nanoslp syz-executor
65530 359356 45009 0 2 0x2 syz-executor
83324 366458 45009 0 3 0x82 nanoslp syz-executor
46117 60454 45009 0 3 0x82 nanoslp syz-executor
93650 227627 45009 0 3 0x82 nanoslp syz-executor
43344 120749 45009 0 3 0x82 nanoslp syz-executor
45009 417329 74960 0 3 0x82 kqread syz-executor
74960 512064 13134 0 3 0x10008a sigsusp ksh
13134 11958 15096 0 3 0x98 kqread sshd-session
15096 249751 10347 0 3 0x92 kqread sshd-session
10347 341851 1 0 3 0x88 kqread sshd
34344 343336 82583 74 3 0x1100092 bpf pflogd
82583 358106 1 0 3 0x80 sbwait pflogd
23315 112004 68192 73 3 0x1100090 kqread syslogd
68192 164481 1 0 3 0x100082 sbwait syslogd
92061 234524 1 0 3 0x100080 kqread resolvd
33230 394560 25656 77 3 0x100092 kqread dhcpleased
93814 235762 25656 77 3 0x100092 kqread dhcpleased
25656 219234 1 0 3 0x80 kqread dhcpleased
26365 167986 0 0 3 0x14200 bored smr
58817 73796 0 0 3 0x14200 pgzero zerothread
95005 280954 0 0 3 0x14200 aiodoned aiodoned
686 493105 0 0 3 0x14200 syncer update
8057 196773 0 0 3 0x14200 cleaner cleaner
56902 434730 0 0 3 0x14200 reaper reaper
13060 313853 0 0 3 0x14200 pgdaemon pagedaemon
6930 257660 0 0 3 0x14200 bored viomb
94760 485647 0 0 3 0x40014200 acpi0 acpi0
41344 490946 0 0 3 0x40014200 idle1
27387 425229 0 0 3 0x14200 bored softnet1
96713 395985 0 0 2 0x14200 softnet0
32285 487780 0 0 3 0x14200 bored systqmp
90358 24878 0 0 3 0x14200 bored systq
74383 124754 0 0 3 0x14200 tmoslp softclockmp
9318 84990 0 0 3 0x40014200 tmoslp softclock
97144 493220 0 0 3 0x40014200 idle0
1 202339 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
Process 31984 (syz-executor) thread 0xffff8000383fca88 (126852)
exclusive rrwlock inode r = 0 (0xfffffd806e089810)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 spec_open+0x2f2 sys/kern/spec_vnops.c:151
#6 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
#7 vn_open+0x6a0 sys/kern/vfs_vnops.c:177
#8 vndioctl+0xc42 sys/dev/vnd.c:458
#9 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
#10 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531
#11 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
#13 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10222 11136K 11306K 166960K 11676 0
pcb 21 13K 14K 166960K 159 0
rtable 156 8K 11K 166960K 398 0
pf 38 18K 67485K 166960K 158 0
ifaddr 35 5K 7K 166960K 85 0
ifgroup 59 2K 2K 166960K 143 0
sysctl 4 1K 9K 166960K 24 0
counters 70 37K 37K 166960K 144 0
ioctlops 0 0K 4K 166960K 1624 0
iov 0 0K 28K 166960K 69 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1436 90K 91K 166960K 2050 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 12 0
VM map 2 1K 1K 166960K 2 0
sem 18 10K 20K 166960K 37 0
dirhash 12 2K 2K 166960K 18 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 93K 166960K 887 0
sigio 0 0K 0K 166960K 22 0
proc 72 115K 164K 166960K 618 0
subproc 72 4K 4K 166960K 81 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 248 0
in_multi 66 4K 7K 166960K 143 0
ether_multi 1 0K 0K 166960K 12 0
mrt 2 0K 0K 166960K 5 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 97 440K 440K 166960K 97 0
exec 0 0K 1K 166960K 584 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 3 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 229 159K 168K 166960K 9735 0
UVM aobj 22 2K 2K 166960K 24 0
pinsyscall 42 84K 102K 166960K 2005 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 32 0
NDP 13 0K 1K 166960K 56 0
temp 78 8656K 8728K 166960K 33775 0
kqueue 17 26K 34K 166960K 188 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 137 0 134 3 2 1 3 0 8 0
rtentry 176 122 0 66 5 0 5 5 0 8 0
unpcb 144 534 0 517 7 6 1 6 0 8 0
syncache 336 6 0 6 2 2 0 1 0 8 0
tcpcb 736 189 0 185 2 1 1 2 0 8 0
arp 136 14 0 6 1 0 1 1 0 8 0
inpcb 328 834 0 821 8 6 2 7 0 8 0
nd6 152 20 0 10 1 0 1 1 0 8 0
pkpcb 40 10 0 10 3 3 0 1 0 8 0
kcovpl 48 9 0 1 1 0 1 1 0 8 0
ppxss 1192 24 0 24 3 3 0 1 0 8 0
pppxif 1504 4 0 4 1 1 0 1 0 8 0
pfstscr 40 2 0 2 1 1 0 1 0 8 0
pffrag 232 13 0 4 1 0 1 1 0 482 0
pffrnode 88 11 0 2 1 0 1 1 0 8 0
pffrent 40 29 0 19 1 0 1 1 0 8 0
pfosfp 40 1430 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1430 0 714 21 0 21 21 0 8 0
pfrktable 1344 14 0 14 2 2 0 1 0 8 0
pfanchor 1288 3 0 2 1 0 1 1 0 8 0
pftag 88 2 0 1 1 0 1 1 0 8 0
pfstitem 24 82 0 22 1 0 1 1 0 8 0
pfstkey 128 84 0 24 2 0 2 2 0 8 0
pfstate 384 83 0 23 6 0 6 6 0 8 0
pfrule 1344 28 0 23 2 1 1 2 0 8 0
rttmr 136 1 0 1 1 1 0 1 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 600 0 297 29 7 22 28 0 8 0
art_table 40 602 0 297 5 0 5 5 0 8 0
art_node 32 122 0 74 1 0 1 1 0 8 0
semupl 112 3 0 3 2 2 0 1 0 8 0
semapl 112 29 0 13 1 0 1 1 0 8 0
shmpl 112 21 0 2 1 0 1 1 0 8 0
dirhash 1024 21 0 4 3 0 3 3 0 8 0
dino2pl 256 3003 0 1495 95 0 95 95 0 8 0
ffsino 296 3003 0 1495 117 0 117 117 0 8 0
nchpl 144 4291 0 2592 64 0 64 64 0 8 0
rtmask 32 4 0 4 3 3 0 1 0 8 0
vnodes 216 3455 0 0 192 0 192 192 0 8 0
namei 1024 14045 0 14045 6 5 1 3 0 8 1
percpumem 16 87 0 37 1 0 1 1 0 8 0
pfiaddrpl 120 3 0 3 1 1 0 1 0 8 0
kstatmem 264 82 0 50 5 2 3 3 0 8 0
scsiplug 72 4 0 4 4 4 0 1 0 8 0
scxspl 216 29563 0 29563 18 17 1 8 1 8 1
plimitpl 152 297 0 278 1 0 1 1 0 8 0
sigapl 424 1211 0 1162 8 1 7 8 0 8 0
knotepl 120 541 0 0 17 0 17 17 0 8 0
kqueuepl 224 330 0 315 4 2 2 3 0 8 0
pipepl 344 184 0 157 3 0 3 3 0 8 0
fdescpl 528 1168 0 1137 3 0 3 3 0 8 0
filepl 160 6792 0 6564 23 13 10 15 0 8 0
lockfpl 104 283 0 281 1 0 1 1 0 8 0
lockfspl 48 117 0 115 1 0 1 1 0 8 0
sessionpl 144 26 0 17 1 0 1 1 0 8 0
pgrppl 48 49 0 32 1 0 1 1 0 8 0
ucredpl 104 1175 0 1161 1 0 1 1 0 8 0
zombiepl 144 1299 0 1297 3 2 1 1 0 8 0
processpl 1232 1211 0 1162 6 2 4 6 0 8 0
procpl 664 2469 0 2414 8 2 6 8 0 8 0
sosppl 168 7 0 7 3 3 0 1 0 8 0
sockpl 752 1537 0 1503 25 21 4 17 0 8 0
mcl64k 65536 17 0 0 3 0 3 3 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 132 0 0 17 0 17 17 0 8 0
mcl2k 2048 29 0 0 4 0 4 4 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 332 0 0 18 0 18 18 0 8 0
bufpl 280 13026 0 6883 440 1 439 440 0 8 0
anonpl 32 11822 0 0 96 0 96 96 0 246 0
amapchunkpl 152 32136 0 31670 41 19 22 26 0 158 0
amappl16 200 5286 0 5224 66 53 13 28 0 8 0
amappl15 192 8 0 8 2 2 0 1 0 8 0
amappl14 184 118 0 106 1 0 1 1 0 8 0
amappl13 176 8 0 8 2 2 0 1 0 8 0
amappl12 168 1825 0 1794 3 1 2 2 0 8 0
amappl11 160 51 0 37 1 0 1 1 0 8 0
amappl10 152 5 0 5 1 1 0 1 0 8 0
amappl9 144 267 0 267 1 1 0 1 0 8 0
amappl8 136 22 0 20 1 0 1 1 0 8 0
amappl7 128 108 0 95 1 0 1 1 0 8 0
amappl6 120 188 0 185 1 0 1 1 0 8 0
amappl5 112 128 0 118 1 0 1 1 0 8 0
amappl4 104 308 0 288 1 0 1 1 0 8 0
amappl3 96 5561 0 5468 3 0 3 3 0 8 0
amappl2 88 1414 0 1332 2 0 2 2 0 8 0
amappl1 80 11743 0 11148 14 0 14 14 0 8 0
amappl 88 8916 0 8759 5 0 5 5 0 92 0
uvmvnodes 80 3455 0 0 71 0 71 71 0 8 0
dma8192 8192 1 0 1 1 1 0 1 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 254 0 254 2 2 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 72 23 0 2 1 0 1 1 0 8 0
uaddrrnd 24 1168 0 1137 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1168 0 1137 1 0 1 1 0 8 0
vmmpekpl 168 10889 0 10843 4 1 3 3 0 8 0
vmmpepl 168 79885 0 77884 143 42 101 110 0 357 0
vmsppl 488 1167 0 1136 6 2 4 5 0 8 0
rwobjpl 80 27511 0 23086 103 7 96 96 0 8 0
pdppl 4096 2343 0 2272 99 28 71 85 0 8 0
pvpl 32 20587 0 0 167 0 167 167 0 265 0
pmappl 256 1167 0 1136 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 289 0 46 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff83876ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83937158) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff83937158) at __mp_lock+0x192 sys/kern/kern_lock.c:165
intr_handler(ffff8000333eba00,ffff80000006ac00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559
Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f
__mp_lock(ffffffff83937158) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff83937158) at __mp_lock+0x192 sys/kern/kern_lock.c:165
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847
Xsoftclock() at Xsoftclock+0x27
__mp_lock(ffffffff83937158) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff83937158) at __mp_lock+0x192 sys/kern/kern_lock.c:165
exit1(ffff8000383fd4e8,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260
sys_exit(ffff8000383fd4e8,ffff8000333ebe10,ffff8000333ebd60) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff8000333ebe10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000333ebe10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x716503ce1d10, count: -15
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffff80003c475950,9,0) at witness_checkorder+0x1ac sys/kern/subr_witness.c:-1
mtx_enter(ffff80003c475940) at mtx_enter+0x4a sys/kern/kern_lock.c:260
filt_procdetach(fffffd805cddb438) at filt_procdetach+0x4d sys/kern/kern_event.c:432
knote_remove(ffff8000fffee7e0,fffffd806eeebd20,fffffd806eeebdc0,35,1) at knote_remove+0x2db sys/kern/kern_event.c:-1
kqueue_purge(ffff8000fffee7e0,fffffd806eeebd20) at kqueue_purge+0x137 sys/kern/kern_event.c:1890
kqueue_close(fffffd8067c7d180,ffff8000fffee7e0) at kqueue_close+0x48 sys/kern/kern_event.c:1934
fdrop(fffffd8067c7d180,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd8067c7d180,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1264
fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1195
exit1(ffff8000fffee7e0,0,0,3) at exit1+0x576 sys/kern/kern_exit.c:215
proc_suspend_check_locked(ffff8000fffee7e0,0) at proc_suspend_check_locked+0x2fd sys/kern/kern_sig.c:2235
userret(ffff8000fffee7e0) at userret+0x8c proc_suspend_check sys/kern/kern_sig.c:-1 [inline]
userret(ffff8000fffee7e0) at userret+0x8c sys/kern/kern_sig.c:2194
syscall(ffff80003c46f810) at syscall+0x9cd mi_syscall_return sys/sys/syscall_mi.h:203 [inline]
syscall(ffff80003c46f810) at syscall+0x9cd sys/arch/amd64/amd64/trap.c:769
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73f45f9ab7e0, count: -15
---
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#syz undup
syzbot found the following issue on:
HEAD commit: 0383cd21a234 Decrease mp->tm_nodes_cnt in the tmpfs_node_g..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=17643142580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=a9fae5148a3cd88f1532
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/377eac4fa7ae/disk-0383cd21.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/1a04bae9385b/bsd-0383cd21.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f1e2a4faf0ff/kernel-0383cd21.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a9fae5...@syzkaller.appspotmail.com
witness: lock_object uninitialized: 0xffff80003c475950
Starting stack trace...
witness_checkorder(ffff80003c475950,9,0) at witness_checkorder+0x1a7 witness_debugger sys/kern/subr_witness.c:2573 [inline]
witness_checkorder(ffff80003c475950,9,0) at witness_checkorder+0x1a7 sys/kern/subr_witness.c:783
mtx_enter(ffff80003c475940) at mtx_enter+0x4a sys/kern/kern_lock.c:260
filt_procdetach(fffffd805cddb438) at filt_procdetach+0x4d sys/kern/kern_event.c:432
knote_remove(ffff8000fffee7e0,fffffd806eeebd20,fffffd806eeebdc0,35,1) at knote_remove+0x2db sys/kern/kern_event.c:-1
kqueue_purge(ffff8000fffee7e0,fffffd806eeebd20) at kqueue_purge+0x137 sys/kern/kern_event.c:1890
kqueue_close(fffffd8067c7d180,ffff8000fffee7e0) at kqueue_close+0x48 sys/kern/kern_event.c:1934
fdrop(fffffd8067c7d180,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd8067c7d180,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1264
fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1195
exit1(ffff8000fffee7e0,0,0,3) at exit1+0x576 sys/kern/kern_exit.c:215
proc_suspend_check_locked(ffff8000fffee7e0,0) at proc_suspend_check_locked+0x2fd sys/kern/kern_sig.c:2235
userret(ffff8000fffee7e0) at userret+0x8c proc_suspend_check sys/kern/kern_sig.c:-1 [inline]
userret(ffff8000fffee7e0) at userret+0x8c sys/kern/kern_sig.c:2194
syscall(ffff80003c46f810) at syscall+0x9cd mi_syscall_return sys/sys/syscall_mi.h:203 [inline]
syscall(ffff80003c46f810) at syscall+0x9cd sys/arch/amd64/amd64/trap.c:769
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73f45f9ab7e0, count: 243
End of stack trace.
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
the kernel did not panic
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffff80003c475950,9,0) at witness_checkorder+0x1ac sys/kern/subr_witness.c:-1
mtx_enter(ffff80003c475940) at mtx_enter+0x4a sys/kern/kern_lock.c:260
filt_procdetach(fffffd805cddb438) at filt_procdetach+0x4d sys/kern/kern_event.c:432
knote_remove(ffff8000fffee7e0,fffffd806eeebd20,fffffd806eeebdc0,35,1) at knote_remove+0x2db sys/kern/kern_event.c:-1
kqueue_purge(ffff8000fffee7e0,fffffd806eeebd20) at kqueue_purge+0x137 sys/kern/kern_event.c:1890
kqueue_close(fffffd8067c7d180,ffff8000fffee7e0) at kqueue_close+0x48 sys/kern/kern_event.c:1934
fdrop(fffffd8067c7d180,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd8067c7d180,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1264
fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1195
exit1(ffff8000fffee7e0,0,0,3) at exit1+0x576 sys/kern/kern_exit.c:215
proc_suspend_check_locked(ffff8000fffee7e0,0) at proc_suspend_check_locked+0x2fd sys/kern/kern_sig.c:2235
userret(ffff8000fffee7e0) at userret+0x8c proc_suspend_check sys/kern/kern_sig.c:-1 [inline]
userret(ffff8000fffee7e0) at userret+0x8c sys/kern/kern_sig.c:2194
syscall(ffff80003c46f810) at syscall+0x9cd mi_syscall_return sys/sys/syscall_mi.h:203 [inline]
syscall(ffff80003c46f810) at syscall+0x9cd sys/arch/amd64/amd64/trap.c:769
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73f45f9ab7e0, count: -15
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80003c46f270
rbx 0
rdx 0
rcx 0xffff8000fffee7e0
rax 0xffff8000299edff0
r8 0xffff80003c46f210
r9 0x8080808080808080
r10 0x9f90e06d9d0ae000
r11 0x25a7fb9c7b600ca7
r12 0xffffffff834730fe user_filtops+0x6
r13 0x9
r14 0xffff80003c475950
r15 0x3
rip 0xffffffff823471f5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80003c46f260
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=325267 pid=79579 tcnt=0 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=82000<WEXIT,SUSPSINGLE>
runpri=32, usrpri=81, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff8000fffeefa8 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff80003c450038,0xffff8000fffee558
process=0xffff80002a3d1358 user=0xffff80003c46a000, vmspace=0xfffffd8072f4d9a8
estcpu=31, cpticks=20, pctcpu=0.2, user=0, sys=16, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
40543 387741 43344 0 3 0x80 fsleep syz-executor
40543 163694 43344 0 3 0x4000080 ttyopn syz-executor
82097 225734 36147 0 3 0x80 fsleep syz-executor
82097 245392 36147 0 3 0x4000080 bell syz-executor
82272 419087 86167 0 3 0x80 fsleep syz-executor
82272 239918 86167 0 3 0x4000080 ttyin syz-executor
50640 493973 83324 0 3 0x80 fsleep syz-executor
50640 300533 83324 0 3 0x4000080 semwait syz-executor
42341 368450 46117 0 3 0x80 fsleep syz-executor
42341 454078 46117 0 3 0x4000080 kqsel syz-executor
31984 209624 93650 0 3 0x80 fsleep syz-executor
31984 126852 93650 0 3 0x4000080 ttyin syz-executor
53197 217080 45009 0 3 0x82 nanoslp syz-executor
49043 392542 1 0 3 0x100083 ttyin getty
61044 16360 0 0 3 0x14200 bored sosplice
36147 317089 45009 0 3 0x82 nanoslp syz-executor
86167 127311 45009 0 3 0x82 nanoslp syz-executor
65530 359356 45009 0 2 0x2 syz-executor
83324 366458 45009 0 3 0x82 nanoslp syz-executor
46117 60454 45009 0 3 0x82 nanoslp syz-executor
93650 227627 45009 0 3 0x82 nanoslp syz-executor
43344 120749 45009 0 3 0x82 nanoslp syz-executor
45009 417329 74960 0 3 0x82 kqread syz-executor
74960 512064 13134 0 3 0x10008a sigsusp ksh
13134 11958 15096 0 3 0x98 kqread sshd-session
15096 249751 10347 0 3 0x92 kqread sshd-session
10347 341851 1 0 3 0x88 kqread sshd
34344 343336 82583 74 3 0x1100092 bpf pflogd
82583 358106 1 0 3 0x80 sbwait pflogd
23315 112004 68192 73 3 0x1100090 kqread syslogd
68192 164481 1 0 3 0x100082 sbwait syslogd
92061 234524 1 0 3 0x100080 kqread resolvd
33230 394560 25656 77 3 0x100092 kqread dhcpleased
93814 235762 25656 77 3 0x100092 kqread dhcpleased
25656 219234 1 0 3 0x80 kqread dhcpleased
26365 167986 0 0 3 0x14200 bored smr
58817 73796 0 0 3 0x14200 pgzero zerothread
95005 280954 0 0 3 0x14200 aiodoned aiodoned
686 493105 0 0 3 0x14200 syncer update
8057 196773 0 0 3 0x14200 cleaner cleaner
56902 434730 0 0 3 0x14200 reaper reaper
13060 313853 0 0 3 0x14200 pgdaemon pagedaemon
6930 257660 0 0 3 0x14200 bored viomb
94760 485647 0 0 3 0x40014200 acpi0 acpi0
41344 490946 0 0 3 0x40014200 idle1
27387 425229 0 0 3 0x14200 bored softnet1
96713 395985 0 0 2 0x14200 softnet0
32285 487780 0 0 3 0x14200 bored systqmp
90358 24878 0 0 3 0x14200 bored systq
74383 124754 0 0 3 0x14200 tmoslp softclockmp
9318 84990 0 0 3 0x40014200 tmoslp softclock
97144 493220 0 0 3 0x40014200 idle0
1 202339 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
Process 31984 (syz-executor) thread 0xffff8000383fca88 (126852)
exclusive rrwlock inode r = 0 (0xfffffd806e089810)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 spec_open+0x2f2 sys/kern/spec_vnops.c:151
#6 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
#7 vn_open+0x6a0 sys/kern/vfs_vnops.c:177
#8 vndioctl+0xc42 sys/dev/vnd.c:458
#9 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
#10 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531
#11 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
#13 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10222 11136K 11306K 166960K 11676 0
pcb 21 13K 14K 166960K 159 0
rtable 156 8K 11K 166960K 398 0
pf 38 18K 67485K 166960K 158 0
ifaddr 35 5K 7K 166960K 85 0
ifgroup 59 2K 2K 166960K 143 0
sysctl 4 1K 9K 166960K 24 0
counters 70 37K 37K 166960K 144 0
ioctlops 0 0K 4K 166960K 1624 0
iov 0 0K 28K 166960K 69 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1436 90K 91K 166960K 2050 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 12 0
VM map 2 1K 1K 166960K 2 0
sem 18 10K 20K 166960K 37 0
dirhash 12 2K 2K 166960K 18 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 93K 166960K 887 0
sigio 0 0K 0K 166960K 22 0
proc 72 115K 164K 166960K 618 0
subproc 72 4K 4K 166960K 81 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 248 0
in_multi 66 4K 7K 166960K 143 0
ether_multi 1 0K 0K 166960K 12 0
mrt 2 0K 0K 166960K 5 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 97 440K 440K 166960K 97 0
exec 0 0K 1K 166960K 584 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 3 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 229 159K 168K 166960K 9735 0
UVM aobj 22 2K 2K 166960K 24 0
pinsyscall 42 84K 102K 166960K 2005 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 32 0
NDP 13 0K 1K 166960K 56 0
temp 78 8656K 8728K 166960K 33775 0
kqueue 17 26K 34K 166960K 188 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 137 0 134 3 2 1 3 0 8 0
rtentry 176 122 0 66 5 0 5 5 0 8 0
unpcb 144 534 0 517 7 6 1 6 0 8 0
syncache 336 6 0 6 2 2 0 1 0 8 0
tcpcb 736 189 0 185 2 1 1 2 0 8 0
arp 136 14 0 6 1 0 1 1 0 8 0
inpcb 328 834 0 821 8 6 2 7 0 8 0
nd6 152 20 0 10 1 0 1 1 0 8 0
pkpcb 40 10 0 10 3 3 0 1 0 8 0
kcovpl 48 9 0 1 1 0 1 1 0 8 0
ppxss 1192 24 0 24 3 3 0 1 0 8 0
pppxif 1504 4 0 4 1 1 0 1 0 8 0
pfstscr 40 2 0 2 1 1 0 1 0 8 0
pffrag 232 13 0 4 1 0 1 1 0 482 0
pffrnode 88 11 0 2 1 0 1 1 0 8 0
pffrent 40 29 0 19 1 0 1 1 0 8 0
pfosfp 40 1430 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1430 0 714 21 0 21 21 0 8 0
pfrktable 1344 14 0 14 2 2 0 1 0 8 0
pfanchor 1288 3 0 2 1 0 1 1 0 8 0
pftag 88 2 0 1 1 0 1 1 0 8 0
pfstitem 24 82 0 22 1 0 1 1 0 8 0
pfstkey 128 84 0 24 2 0 2 2 0 8 0
pfstate 384 83 0 23 6 0 6 6 0 8 0
pfrule 1344 28 0 23 2 1 1 2 0 8 0
rttmr 136 1 0 1 1 1 0 1 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 600 0 297 29 7 22 28 0 8 0
art_table 40 602 0 297 5 0 5 5 0 8 0
art_node 32 122 0 74 1 0 1 1 0 8 0
semupl 112 3 0 3 2 2 0 1 0 8 0
semapl 112 29 0 13 1 0 1 1 0 8 0
shmpl 112 21 0 2 1 0 1 1 0 8 0
dirhash 1024 21 0 4 3 0 3 3 0 8 0
dino2pl 256 3003 0 1495 95 0 95 95 0 8 0
ffsino 296 3003 0 1495 117 0 117 117 0 8 0
nchpl 144 4291 0 2592 64 0 64 64 0 8 0
rtmask 32 4 0 4 3 3 0 1 0 8 0
vnodes 216 3455 0 0 192 0 192 192 0 8 0
namei 1024 14045 0 14045 6 5 1 3 0 8 1
percpumem 16 87 0 37 1 0 1 1 0 8 0
pfiaddrpl 120 3 0 3 1 1 0 1 0 8 0
kstatmem 264 82 0 50 5 2 3 3 0 8 0
scsiplug 72 4 0 4 4 4 0 1 0 8 0
scxspl 216 29563 0 29563 18 17 1 8 1 8 1
plimitpl 152 297 0 278 1 0 1 1 0 8 0
sigapl 424 1211 0 1162 8 1 7 8 0 8 0
knotepl 120 541 0 0 17 0 17 17 0 8 0
kqueuepl 224 330 0 315 4 2 2 3 0 8 0
pipepl 344 184 0 157 3 0 3 3 0 8 0
fdescpl 528 1168 0 1137 3 0 3 3 0 8 0
filepl 160 6792 0 6564 23 13 10 15 0 8 0
lockfpl 104 283 0 281 1 0 1 1 0 8 0
lockfspl 48 117 0 115 1 0 1 1 0 8 0
sessionpl 144 26 0 17 1 0 1 1 0 8 0
pgrppl 48 49 0 32 1 0 1 1 0 8 0
ucredpl 104 1175 0 1161 1 0 1 1 0 8 0
zombiepl 144 1299 0 1297 3 2 1 1 0 8 0
processpl 1232 1211 0 1162 6 2 4 6 0 8 0
procpl 664 2469 0 2414 8 2 6 8 0 8 0
sosppl 168 7 0 7 3 3 0 1 0 8 0
sockpl 752 1537 0 1503 25 21 4 17 0 8 0
mcl64k 65536 17 0 0 3 0 3 3 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 132 0 0 17 0 17 17 0 8 0
mcl2k 2048 29 0 0 4 0 4 4 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 332 0 0 18 0 18 18 0 8 0
bufpl 280 13026 0 6883 440 1 439 440 0 8 0
anonpl 32 11822 0 0 96 0 96 96 0 246 0
amapchunkpl 152 32136 0 31670 41 19 22 26 0 158 0
amappl16 200 5286 0 5224 66 53 13 28 0 8 0
amappl15 192 8 0 8 2 2 0 1 0 8 0
amappl14 184 118 0 106 1 0 1 1 0 8 0
amappl13 176 8 0 8 2 2 0 1 0 8 0
amappl12 168 1825 0 1794 3 1 2 2 0 8 0
amappl11 160 51 0 37 1 0 1 1 0 8 0
amappl10 152 5 0 5 1 1 0 1 0 8 0
amappl9 144 267 0 267 1 1 0 1 0 8 0
amappl8 136 22 0 20 1 0 1 1 0 8 0
amappl7 128 108 0 95 1 0 1 1 0 8 0
amappl6 120 188 0 185 1 0 1 1 0 8 0
amappl5 112 128 0 118 1 0 1 1 0 8 0
amappl4 104 308 0 288 1 0 1 1 0 8 0
amappl3 96 5561 0 5468 3 0 3 3 0 8 0
amappl2 88 1414 0 1332 2 0 2 2 0 8 0
amappl1 80 11743 0 11148 14 0 14 14 0 8 0
amappl 88 8916 0 8759 5 0 5 5 0 92 0
uvmvnodes 80 3455 0 0 71 0 71 71 0 8 0
dma8192 8192 1 0 1 1 1 0 1 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 254 0 254 2 2 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 72 23 0 2 1 0 1 1 0 8 0
uaddrrnd 24 1168 0 1137 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1168 0 1137 1 0 1 1 0 8 0
vmmpekpl 168 10889 0 10843 4 1 3 3 0 8 0
vmmpepl 168 79885 0 77884 143 42 101 110 0 357 0
vmsppl 488 1167 0 1136 6 2 4 5 0 8 0
rwobjpl 80 27511 0 23086 103 7 96 96 0 8 0
pdppl 4096 2343 0 2272 99 28 71 85 0 8 0
pvpl 32 20587 0 0 167 0 167 167 0 265 0
pmappl 256 1167 0 1136 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 289 0 46 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff83876ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83937158) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff83937158) at __mp_lock+0x192 sys/kern/kern_lock.c:165
intr_handler(ffff8000333eba00,ffff80000006ac00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559
Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f
__mp_lock(ffffffff83937158) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff83937158) at __mp_lock+0x192 sys/kern/kern_lock.c:165
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847
Xsoftclock() at Xsoftclock+0x27
__mp_lock(ffffffff83937158) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff83937158) at __mp_lock+0x192 sys/kern/kern_lock.c:165
exit1(ffff8000383fd4e8,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260
sys_exit(ffff8000383fd4e8,ffff8000333ebe10,ffff8000333ebd60) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff8000333ebe10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000333ebe10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x716503ce1d10, count: -15
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffff80003c475950,9,0) at witness_checkorder+0x1ac sys/kern/subr_witness.c:-1
mtx_enter(ffff80003c475940) at mtx_enter+0x4a sys/kern/kern_lock.c:260
filt_procdetach(fffffd805cddb438) at filt_procdetach+0x4d sys/kern/kern_event.c:432
knote_remove(ffff8000fffee7e0,fffffd806eeebd20,fffffd806eeebdc0,35,1) at knote_remove+0x2db sys/kern/kern_event.c:-1
kqueue_purge(ffff8000fffee7e0,fffffd806eeebd20) at kqueue_purge+0x137 sys/kern/kern_event.c:1890
kqueue_close(fffffd8067c7d180,ffff8000fffee7e0) at kqueue_close+0x48 sys/kern/kern_event.c:1934
fdrop(fffffd8067c7d180,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd8067c7d180,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1264
fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1195
exit1(ffff8000fffee7e0,0,0,3) at exit1+0x576 sys/kern/kern_exit.c:215
proc_suspend_check_locked(ffff8000fffee7e0,0) at proc_suspend_check_locked+0x2fd sys/kern/kern_sig.c:2235
userret(ffff8000fffee7e0) at userret+0x8c proc_suspend_check sys/kern/kern_sig.c:-1 [inline]
userret(ffff8000fffee7e0) at userret+0x8c sys/kern/kern_sig.c:2194
syscall(ffff80003c46f810) at syscall+0x9cd mi_syscall_return sys/sys/syscall_mi.h:203 [inline]
syscall(ffff80003c46f810) at syscall+0x9cd sys/arch/amd64/amd64/trap.c:769
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73f45f9ab7e0, count: -15
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This report is generated by a bot. It may contain errors.
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