protection_fault: in6_addmulti (5)
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syzbot
Dec 4, 2025, 8:47:33 PM (2 days ago) Dec 4
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 9dbbe670f20c sys/videoio.h: sync with Linux
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=115f3cc2580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=3dcb7e0d63b11f6f341c
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ba68d8a1c2d9/disk-9dbbe670.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/5c983d94e2f1/bsd-9dbbe670.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e545873c1bfa/kernel-9dbbe670.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3dcb7e...@syzkaller.appspotmail.com
kernel: protection fault trap, code=0
Stopped at in6_addmulti+0x184: movzbl 0x1(%rax),%ebx
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
in6_addmulti(ffff80003c42ffe8,ffff80000147c800,ffff80003c43005c) at in6_addmulti+0x184 in6_lookupmulti sys/netinet6/in6.c:1013 [inline]
in6_addmulti(ffff80003c42ffe8,ffff80000147c800,ffff80003c43005c) at in6_addmulti+0x184 sys/netinet6/in6.c:1038
in6_joingroup(ffff80000147c800,ffff80003c42ffe8,ffff80003c43005c) at in6_joingroup+0x6c sys/netinet6/in6.c:-1
in6_update_ifa(ffff80000147c800,ffff80003c4300e0,0) at in6_update_ifa+0x1a86 sys/netinet6/in6.c:-1
in6_ifattach_linklocal(ffff80000147c800,0) at in6_ifattach_linklocal+0x33b sys/netinet6/in6_ifattach.c:266
in6_ifattach(ffff80000147c800) at in6_ifattach+0x2d0 sys/netinet6/in6_ifattach.c:384
ifnewlladdr(ffff80000147c800) at ifnewlladdr+0x242 sys/net/if.c:3549
ifioctl(ffff8000015200b0,8020691f,ffff80003c430340,ffff8000fffe6a88) at ifioctl+0x2d3c sys/net/if.c:2385
sys_ioctl(ffff8000fffe6a88,ffff80003c430520,ffff80003c430470) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003c430520) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c430520) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xed3ba1a6ae0, count: -10
ddb{0}> show registers
rdi 0xfffffffe
rsi 0xfffffffe
rbp 0xffff80003c42fe90
rbx 0xfffffffe
rdx 0
rcx 0xffff8000fffe6a88
rax 0xdead0036dead4110
r8 0x2
r9 0
r10 0xd8d497c13d617bd7
r11 0xf2da236d36ac3b39
r12 0xffff80003c42ffe8
r13 0xffff800001506200
r14 0xffff80000147c800
r15 0xffff80003c430001
rip 0xffffffff819924f4 in6_addmulti+0x184
cs 0x8
rflags 0x10286 __ALIGN_SIZE+0xf286
rsp 0xffff80003c42fd10
ss 0x10
in6_addmulti+0x184: movzbl 0x1(%rax),%ebx
ddb{0}> show proc
PROC (syz-executor) tid=221105 pid=87062 tcnt=4 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=86, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000fffe6fb8,0xffff8000fffe6800
process=0xffff8000fffec9b8 user=0xffff80003c42b000, vmspace=0xfffffd806c71c5d0
estcpu=36, cpticks=5, pctcpu=0.0, user=0, sys=5, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
37259 116663 55978 0 2 0 syz-executor
37259 246587 55978 0 3 0x4000080 fsleep syz-executor
37259 340805 55978 0 3 0x4000080 fsleep syz-executor
37259 395988 55978 0 3 0x4000080 fsleep syz-executor
85841 425712 78214 0 2 0 syz-executor
87062 516377 46049 0 2 0xc80 syz-executor
87062 373801 46049 0 3 0x4000000 smrbar syz-executor
*87062 221105 46049 0 7 0x4000000 syz-executor
87062 365287 46049 0 3 0x4000080 fsleep syz-executor
89355 92488 47253 0 2 0 syz-executor
89355 201812 47253 0 3 0x4000080 fsleep syz-executor
89355 139390 47253 0 3 0x4000000 netlock syz-executor
1588 5106 15744 60928 2 0x10 syz-executor
1588 140930 15744 60928 3 0x4000090 fsleep syz-executor
15744 342552 69903 0 3 0x82 nanoslp syz-executor
91293 212779 69903 0 3 0x82 nanoslp syz-executor
88099 243786 86835 0 2 0x100002 ndp
86835 351990 25692 0 3 0x10008a sigsusp sh
78214 193627 69903 0 3 0x82 nanoslp syz-executor
47253 121363 69903 0 3 0x82 nanoslp syz-executor
55978 492843 69903 0 3 0x82 nanoslp syz-executor
68144 233747 69903 0 3 0x82 piperd syz-executor
46049 399876 69903 0 3 0x82 nanoslp syz-executor
25692 411758 69903 0 3 0x82 wait syz-executor
69903 25634 92448 0 3 0x2 netlock syz-executor
92448 317839 99750 0 3 0x10008a sigsusp ksh
99750 352981 42462 0 3 0x98 kqread sshd-session
42462 359675 77536 0 3 0x92 kqread sshd-session
91872 23917 1 0 3 0x100083 ttyin getty
77536 478689 1 0 3 0x88 kqread sshd
66187 160377 23542 74 3 0x1100092 bpf pflogd
23542 428070 1 0 3 0x80 sbwait pflogd
44585 27361 80225 73 3 0x1100090 kqread syslogd
80225 31331 1 0 3 0x100082 sbwait syslogd
42331 157570 1 0 2 0x100001 resolvd
51374 214952 72971 77 7 0x100013 dhcpleased
26374 95785 72971 77 3 0x100092 kqread dhcpleased
72971 429055 1 0 3 0x80 kqread dhcpleased
29513 408552 0 0 3 0x14200 bored smr
36107 420396 0 0 2 0x14200 zerothread
99446 236937 0 0 3 0x14200 aiodoned aiodoned
18759 468469 0 0 3 0x14200 syncer update
60789 89779 0 0 3 0x14200 cleaner cleaner
87906 511752 0 0 3 0x14200 reaper reaper
27541 411482 0 0 3 0x14200 pgdaemon pagedaemon
71483 88074 0 0 3 0x14200 bored viomb
73917 461903 0 0 3 0x40014200 acpi0 acpi0
95294 106588 0 0 3 0x40014200 idle1
15551 439610 0 0 3 0x14200 bored softnet1
2901 148947 0 0 3 0x14200 bored softnet0
21492 38406 0 0 3 0x14200 smrbar systqmp
355 11089 0 0 3 0x14200 bored systq
8177 397373 0 0 3 0x14200 tmoslp softclockmp
79504 334920 0 0 2 0x40014200 softclock
3002 488089 0 0 3 0x40014200 idle0
1 56497 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{0}> show all locks
Process 87062 (syz-executor) thread 0xffff8000fffe6fb8 (373801)
exclusive rwlock clonelk r = 0 (0xffffffff8381d818)
#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 if_clone_destroy+0x93 sys/net/if.c:-1
#3 ifioctl+0x59d sys/net/if.c:2089
#4 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#6 Xsyscall+0x128
Process 87062 (syz-executor) thread 0xffff8000fffe6a88 (221105)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838c1350)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
#2 malloc+0xe3 sys/kern/kern_malloc.c:175
#3 in6_update_ifa+0x11b9 sys/netinet6/in6.c:638
#4 in6_ifattach_linklocal+0x33b sys/netinet6/in6_ifattach.c:266
#5 in6_ifattach+0x2d0 sys/netinet6/in6_ifattach.c:384
#6 ifnewlladdr+0x242 sys/net/if.c:3549
#7 ifioctl+0x2d3c sys/net/if.c:2385
#8 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#10 Xsyscall+0x128
exclusive rwlock netlock r = 0 (0xffffffff8381d910)
#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 ifioctl+0x1be9 sys/net/if.c:2367
#3 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#5 Xsyscall+0x128
Process 69903 (syz-executor) thread 0xffff80002a2727d8 (25634)
exclusive rwlock sbufsnd r = 0 (0xffff800010fde1f8)
#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 sblock+0xb6 sys/kern/uipc_socket2.c:536
#3 sosend+0x2e9 sys/kern/uipc_socket.c:639
#4 dofilewritev+0x242 sys/kern/sys_generic.c:380
#5 sys_write+0xa2 sys/kern/sys_generic.c:300
#6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#7 Xsyscall+0x128
Process 21492 (systqmp) thread 0xffff8000ffffe298 (38406)
shared rwlock systqmp r = 0 (0xffffffff837d09b8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x12a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10222 11051K 11977K 166960K 12630 0
pcb 17 14K 14K 166960K 181 0
rtable 209 8K 9K 166960K 763 0
pf 42 18K 18K 166960K 119 0
ifaddr 44 7K 8K 166960K 121 0
ifgroup 65 2K 2K 166960K 152 0
sysctl 3 1K 9K 166960K 9 0
counters 78 38K 38K 166960K 162 0
ioctlops 0 0K 4K 166960K 1627 0
iov 0 0K 24K 166960K 100 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1493 94K 94K 166960K 2343 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 11 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 23 0
dirhash 57 10K 14K 166960K 1104 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 240K 166960K 814 0
sigio 0 0K 0K 166960K 92 0
proc 72 115K 164K 166960K 628 0
subproc 72 4K 4K 166960K 90 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 78 0
in_multi 79 5K 7K 166960K 316 0
ether_multi 1 0K 0K 166960K 12 0
mrt 1 0K 0K 166960K 3 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 476 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 251 162K 185K 166960K 9176 0
UVM aobj 14 4K 6K 166960K 16 0
pinsyscall 44 88K 102K 166960K 1983 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 51 0
NDP 17 0K 1K 166960K 90 0
temp 53 8673K 8749K 166960K 40775 0
kqueue 14 22K 30K 166960K 167 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> 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 120 118 0 114 2 1 1 2 0 8 0
rtentry 176 256 0 170 6 0 6 6 0 8 0
unpcb 144 559 0 541 6 5 1 6 0 8 0
syncache 336 7 0 7 1 1 0 1 0 8 0
tcpqe 32 2 0 2 1 1 0 1 0 8 0
tcpcb 736 216 0 210 7 0 7 7 0 8 6
arp 136 24 0 7 1 0 1 1 0 8 0
inpcb 328 925 0 883 13 6 7 7 0 8 3
nd6 152 60 0 39 2 0 2 2 0 8 1
pkpcb 40 3 0 3 2 1 1 1 0 8 1
kcovpl 48 10 0 2 1 0 1 1 0 8 0
ppxss 1192 34 0 31 1 0 1 1 0 8 0
pppxif 1504 3 0 3 2 2 0 1 0 8 0
pffrag 232 23 0 17 1 0 1 1 0 482 0
pffrnode 88 22 0 17 1 0 1 1 0 8 0
pffrent 40 42 0 36 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 57 0 16 1 0 1 1 0 8 0
pfstkey 128 57 0 16 2 0 2 2 0 8 0
pfstate 448 57 0 16 6 0 6 6 0 8 0
pfrule 1344 21 0 16 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 1315 0 276 68 3 65 65 0 8 0
art_table 40 1317 0 276 11 0 11 11 0 8 0
art_node 32 256 0 68 2 0 2 2 0 8 0
sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 20 0 10 1 0 1 1 0 8 0
shmpl 112 11 0 1 1 0 1 1 0 8 0
dirhash 1024 385 0 353 5 0 5 5 0 8 0
dino2pl 256 2976 0 1471 95 0 95 95 0 8 0
ffsino 296 2976 0 1471 117 0 117 117 0 8 0
nchpl 144 4055 0 2353 64 0 64 64 0 8 0
rtmask 32 5 0 5 2 1 1 1 0 8 1
vnodes 216 3644 0 0 203 0 203 203 0 8 0
namei 1024 13707 0 13707 2 1 1 2 0 8 1
percpumem 16 96 0 42 1 0 1 1 0 8 0
vcpupl 3968 2 0 1 1 0 1 1 0 8 0
vmpool 840 2 0 1 1 0 1 1 0 8 0
kstatmem 264 92 0 56 3 0 3 3 0 8 0
scsiplug 72 7 0 7 2 1 1 1 0 8 1
scxspl 216 20708 0 20708 7 6 1 6 1 8 1
plimitpl 152 224 0 207 1 0 1 1 0 8 0
sigapl 424 1099 0 1051 7 0 7 7 0 8 0
knotepl 120 573 0 0 18 0 18 18 0 8 0
kqueuepl 224 309 0 298 4 1 3 3 0 8 2
pipepl 344 186 0 159 3 0 3 3 0 8 0
fdescpl 528 1079 0 1047 3 0 3 3 0 8 0
filepl 160 6937 0 6686 28 6 22 22 0 8 11
lockfpl 104 405 0 402 2 0 2 2 0 8 1
lockfspl 48 93 0 90 1 0 1 1 0 8 0
sessionpl 144 28 0 19 1 0 1 1 0 8 0
pgrppl 48 51 0 34 1 0 1 1 0 8 0
ucredpl 104 1241 0 1226 1 0 1 1 0 8 0
zombiepl 144 1189 0 1188 1 0 1 1 0 8 0
processpl 1232 1099 0 1051 5 0 5 5 0 8 0
procpl 664 2251 0 2194 6 0 6 6 0 8 0
sosppl 176 5 0 5 2 1 1 1 0 8 1
sockpl 752 1625 0 1560 27 16 11 20 0 8 4
mcl64k 65536 5 0 0 1 0 1 1 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 116 0 0 15 0 15 15 0 8 1
mcl2k 2048 76 0 0 8 0 8 8 0 8 0
mtagpl 96 73 0 0 2 0 2 2 0 8 0
mbufpl 256 1883 0 0 118 0 118 118 0 8 0
bufpl 280 8432 0 2295 439 0 439 439 0 8 0
anonpl 32 9644 0 0 78 0 78 78 0 246 0
amapchunkpl 152 30511 0 30021 38 4 34 34 0 158 13
amappl16 200 4052 0 4017 31 16 15 18 0 8 7
amappl15 192 6 0 5 1 0 1 1 0 8 0
amappl14 184 9 0 9 2 1 1 1 0 8 1
amappl13 176 448 0 446 1 0 1 1 0 8 0
amappl12 168 1537 0 1493 3 0 3 3 0 8 0
amappl11 160 14 0 14 1 1 0 1 0 8 0
amappl10 152 49 0 34 1 0 1 1 0 8 0
amappl9 144 266 0 266 1 1 0 1 0 8 0
amappl8 136 24 0 22 1 0 1 1 0 8 0
amappl7 128 88 0 87 1 0 1 1 0 8 0
amappl6 120 304 0 289 1 0 1 1 0 8 0
amappl5 112 83 0 73 1 0 1 1 0 8 0
amappl4 104 450 0 418 1 0 1 1 0 8 0
amappl3 96 5716 0 5607 5 1 4 4 0 8 0
amappl2 88 582 0 519 2 0 2 2 0 8 0
amappl1 80 12946 0 12324 15 0 15 15 0 8 0
amappl 88 8284 0 8117 5 0 5 5 0 92 0
uvmvnodes 80 125 0 0 3 0 3 3 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
dma512 512 1 0 1 1 0 1 1 0 8 1
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 15 0 2 1 0 1 1 0 8 0
uaddrrnd 24 1079 0 1047 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1079 0 1047 1 0 1 1 0 8 0
vmmpekpl 168 10649 0 10599 3 0 3 3 0 8 0
vmmpepl 168 76723 0 74753 109 9 100 103 0 357 0
vmsppl 488 1078 0 1047 5 0 5 5 0 8 0
rwobjpl 80 23756 0 22645 31 3 28 30 0 8 0
pdppl 4096 2170 0 2097 104 29 75 84 0 8 2
pvpl 32 18616 0 0 151 1 150 150 0 265 0
pmappl 256 1080 0 1048 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 441 0 36 12 0 12 12 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
in6_addmulti(ffff80003c42ffe8,ffff80000147c800,ffff80003c43005c) at in6_addmulti+0x184 in6_lookupmulti sys/netinet6/in6.c:1013 [inline]
in6_addmulti(ffff80003c42ffe8,ffff80000147c800,ffff80003c43005c) at in6_addmulti+0x184 sys/netinet6/in6.c:1038
in6_joingroup(ffff80000147c800,ffff80003c42ffe8,ffff80003c43005c) at in6_joingroup+0x6c sys/netinet6/in6.c:-1
in6_update_ifa(ffff80000147c800,ffff80003c4300e0,0) at in6_update_ifa+0x1a86 sys/netinet6/in6.c:-1
in6_ifattach_linklocal(ffff80000147c800,0) at in6_ifattach_linklocal+0x33b sys/netinet6/in6_ifattach.c:266
in6_ifattach(ffff80000147c800) at in6_ifattach+0x2d0 sys/netinet6/in6_ifattach.c:384
ifnewlladdr(ffff80000147c800) at ifnewlladdr+0x242 sys/net/if.c:3549
ifioctl(ffff8000015200b0,8020691f,ffff80003c430340,ffff8000fffe6a88) at ifioctl+0x2d3c sys/net/if.c:2385
sys_ioctl(ffff8000fffe6a88,ffff80003c430520,ffff80003c430470) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003c430520) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c430520) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xed3ba1a6ae0, count: -10
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff8000299edff0) 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(ffffffff838c1148) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838c1148) at __mp_lock+0x192 sys/kern/kern_lock.c:165
ktrsyscall(ffff80002a272540,3,18,ffff80002a29e420) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline]
ktrsyscall(ffff80002a272540,3,18,ffff80002a29e420) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183
syscall(ffff80002a29e420) at syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline]
syscall(ffff80002a29e420) at syscall+0x304 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x70457ae42090, count: -7
---
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syzbot found the following issue on:
HEAD commit: 9dbbe670f20c sys/videoio.h: sync with Linux
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=115f3cc2580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=3dcb7e0d63b11f6f341c
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ba68d8a1c2d9/disk-9dbbe670.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/5c983d94e2f1/bsd-9dbbe670.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e545873c1bfa/kernel-9dbbe670.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3dcb7e...@syzkaller.appspotmail.com
kernel: protection fault trap, code=0
Stopped at in6_addmulti+0x184: movzbl 0x1(%rax),%ebx
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
in6_addmulti(ffff80003c42ffe8,ffff80000147c800,ffff80003c43005c) at in6_addmulti+0x184 in6_lookupmulti sys/netinet6/in6.c:1013 [inline]
in6_addmulti(ffff80003c42ffe8,ffff80000147c800,ffff80003c43005c) at in6_addmulti+0x184 sys/netinet6/in6.c:1038
in6_joingroup(ffff80000147c800,ffff80003c42ffe8,ffff80003c43005c) at in6_joingroup+0x6c sys/netinet6/in6.c:-1
in6_update_ifa(ffff80000147c800,ffff80003c4300e0,0) at in6_update_ifa+0x1a86 sys/netinet6/in6.c:-1
in6_ifattach_linklocal(ffff80000147c800,0) at in6_ifattach_linklocal+0x33b sys/netinet6/in6_ifattach.c:266
in6_ifattach(ffff80000147c800) at in6_ifattach+0x2d0 sys/netinet6/in6_ifattach.c:384
ifnewlladdr(ffff80000147c800) at ifnewlladdr+0x242 sys/net/if.c:3549
ifioctl(ffff8000015200b0,8020691f,ffff80003c430340,ffff8000fffe6a88) at ifioctl+0x2d3c sys/net/if.c:2385
sys_ioctl(ffff8000fffe6a88,ffff80003c430520,ffff80003c430470) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003c430520) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c430520) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xed3ba1a6ae0, count: -10
ddb{0}> show registers
rdi 0xfffffffe
rsi 0xfffffffe
rbp 0xffff80003c42fe90
rbx 0xfffffffe
rdx 0
rcx 0xffff8000fffe6a88
rax 0xdead0036dead4110
r8 0x2
r9 0
r10 0xd8d497c13d617bd7
r11 0xf2da236d36ac3b39
r12 0xffff80003c42ffe8
r13 0xffff800001506200
r14 0xffff80000147c800
r15 0xffff80003c430001
rip 0xffffffff819924f4 in6_addmulti+0x184
cs 0x8
rflags 0x10286 __ALIGN_SIZE+0xf286
rsp 0xffff80003c42fd10
ss 0x10
in6_addmulti+0x184: movzbl 0x1(%rax),%ebx
ddb{0}> show proc
PROC (syz-executor) tid=221105 pid=87062 tcnt=4 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=86, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000fffe6fb8,0xffff8000fffe6800
process=0xffff8000fffec9b8 user=0xffff80003c42b000, vmspace=0xfffffd806c71c5d0
estcpu=36, cpticks=5, pctcpu=0.0, user=0, sys=5, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
37259 116663 55978 0 2 0 syz-executor
37259 246587 55978 0 3 0x4000080 fsleep syz-executor
37259 340805 55978 0 3 0x4000080 fsleep syz-executor
37259 395988 55978 0 3 0x4000080 fsleep syz-executor
85841 425712 78214 0 2 0 syz-executor
87062 516377 46049 0 2 0xc80 syz-executor
87062 373801 46049 0 3 0x4000000 smrbar syz-executor
*87062 221105 46049 0 7 0x4000000 syz-executor
87062 365287 46049 0 3 0x4000080 fsleep syz-executor
89355 92488 47253 0 2 0 syz-executor
89355 201812 47253 0 3 0x4000080 fsleep syz-executor
89355 139390 47253 0 3 0x4000000 netlock syz-executor
1588 5106 15744 60928 2 0x10 syz-executor
1588 140930 15744 60928 3 0x4000090 fsleep syz-executor
15744 342552 69903 0 3 0x82 nanoslp syz-executor
91293 212779 69903 0 3 0x82 nanoslp syz-executor
88099 243786 86835 0 2 0x100002 ndp
86835 351990 25692 0 3 0x10008a sigsusp sh
78214 193627 69903 0 3 0x82 nanoslp syz-executor
47253 121363 69903 0 3 0x82 nanoslp syz-executor
55978 492843 69903 0 3 0x82 nanoslp syz-executor
68144 233747 69903 0 3 0x82 piperd syz-executor
46049 399876 69903 0 3 0x82 nanoslp syz-executor
25692 411758 69903 0 3 0x82 wait syz-executor
69903 25634 92448 0 3 0x2 netlock syz-executor
92448 317839 99750 0 3 0x10008a sigsusp ksh
99750 352981 42462 0 3 0x98 kqread sshd-session
42462 359675 77536 0 3 0x92 kqread sshd-session
91872 23917 1 0 3 0x100083 ttyin getty
77536 478689 1 0 3 0x88 kqread sshd
66187 160377 23542 74 3 0x1100092 bpf pflogd
23542 428070 1 0 3 0x80 sbwait pflogd
44585 27361 80225 73 3 0x1100090 kqread syslogd
80225 31331 1 0 3 0x100082 sbwait syslogd
42331 157570 1 0 2 0x100001 resolvd
51374 214952 72971 77 7 0x100013 dhcpleased
26374 95785 72971 77 3 0x100092 kqread dhcpleased
72971 429055 1 0 3 0x80 kqread dhcpleased
29513 408552 0 0 3 0x14200 bored smr
36107 420396 0 0 2 0x14200 zerothread
99446 236937 0 0 3 0x14200 aiodoned aiodoned
18759 468469 0 0 3 0x14200 syncer update
60789 89779 0 0 3 0x14200 cleaner cleaner
87906 511752 0 0 3 0x14200 reaper reaper
27541 411482 0 0 3 0x14200 pgdaemon pagedaemon
71483 88074 0 0 3 0x14200 bored viomb
73917 461903 0 0 3 0x40014200 acpi0 acpi0
95294 106588 0 0 3 0x40014200 idle1
15551 439610 0 0 3 0x14200 bored softnet1
2901 148947 0 0 3 0x14200 bored softnet0
21492 38406 0 0 3 0x14200 smrbar systqmp
355 11089 0 0 3 0x14200 bored systq
8177 397373 0 0 3 0x14200 tmoslp softclockmp
79504 334920 0 0 2 0x40014200 softclock
3002 488089 0 0 3 0x40014200 idle0
1 56497 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{0}> show all locks
Process 87062 (syz-executor) thread 0xffff8000fffe6fb8 (373801)
exclusive rwlock clonelk r = 0 (0xffffffff8381d818)
#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 if_clone_destroy+0x93 sys/net/if.c:-1
#3 ifioctl+0x59d sys/net/if.c:2089
#4 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#6 Xsyscall+0x128
Process 87062 (syz-executor) thread 0xffff8000fffe6a88 (221105)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838c1350)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
#2 malloc+0xe3 sys/kern/kern_malloc.c:175
#3 in6_update_ifa+0x11b9 sys/netinet6/in6.c:638
#4 in6_ifattach_linklocal+0x33b sys/netinet6/in6_ifattach.c:266
#5 in6_ifattach+0x2d0 sys/netinet6/in6_ifattach.c:384
#6 ifnewlladdr+0x242 sys/net/if.c:3549
#7 ifioctl+0x2d3c sys/net/if.c:2385
#8 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#10 Xsyscall+0x128
exclusive rwlock netlock r = 0 (0xffffffff8381d910)
#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 ifioctl+0x1be9 sys/net/if.c:2367
#3 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#5 Xsyscall+0x128
Process 69903 (syz-executor) thread 0xffff80002a2727d8 (25634)
exclusive rwlock sbufsnd r = 0 (0xffff800010fde1f8)
#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 sblock+0xb6 sys/kern/uipc_socket2.c:536
#3 sosend+0x2e9 sys/kern/uipc_socket.c:639
#4 dofilewritev+0x242 sys/kern/sys_generic.c:380
#5 sys_write+0xa2 sys/kern/sys_generic.c:300
#6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#7 Xsyscall+0x128
Process 21492 (systqmp) thread 0xffff8000ffffe298 (38406)
shared rwlock systqmp r = 0 (0xffffffff837d09b8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x12a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10222 11051K 11977K 166960K 12630 0
pcb 17 14K 14K 166960K 181 0
rtable 209 8K 9K 166960K 763 0
pf 42 18K 18K 166960K 119 0
ifaddr 44 7K 8K 166960K 121 0
ifgroup 65 2K 2K 166960K 152 0
sysctl 3 1K 9K 166960K 9 0
counters 78 38K 38K 166960K 162 0
ioctlops 0 0K 4K 166960K 1627 0
iov 0 0K 24K 166960K 100 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1493 94K 94K 166960K 2343 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 11 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 23 0
dirhash 57 10K 14K 166960K 1104 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 240K 166960K 814 0
sigio 0 0K 0K 166960K 92 0
proc 72 115K 164K 166960K 628 0
subproc 72 4K 4K 166960K 90 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 78 0
in_multi 79 5K 7K 166960K 316 0
ether_multi 1 0K 0K 166960K 12 0
mrt 1 0K 0K 166960K 3 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 476 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 251 162K 185K 166960K 9176 0
UVM aobj 14 4K 6K 166960K 16 0
pinsyscall 44 88K 102K 166960K 1983 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 51 0
NDP 17 0K 1K 166960K 90 0
temp 53 8673K 8749K 166960K 40775 0
kqueue 14 22K 30K 166960K 167 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> 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 120 118 0 114 2 1 1 2 0 8 0
rtentry 176 256 0 170 6 0 6 6 0 8 0
unpcb 144 559 0 541 6 5 1 6 0 8 0
syncache 336 7 0 7 1 1 0 1 0 8 0
tcpqe 32 2 0 2 1 1 0 1 0 8 0
tcpcb 736 216 0 210 7 0 7 7 0 8 6
arp 136 24 0 7 1 0 1 1 0 8 0
inpcb 328 925 0 883 13 6 7 7 0 8 3
nd6 152 60 0 39 2 0 2 2 0 8 1
pkpcb 40 3 0 3 2 1 1 1 0 8 1
kcovpl 48 10 0 2 1 0 1 1 0 8 0
ppxss 1192 34 0 31 1 0 1 1 0 8 0
pppxif 1504 3 0 3 2 2 0 1 0 8 0
pffrag 232 23 0 17 1 0 1 1 0 482 0
pffrnode 88 22 0 17 1 0 1 1 0 8 0
pffrent 40 42 0 36 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 57 0 16 1 0 1 1 0 8 0
pfstkey 128 57 0 16 2 0 2 2 0 8 0
pfstate 448 57 0 16 6 0 6 6 0 8 0
pfrule 1344 21 0 16 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 1315 0 276 68 3 65 65 0 8 0
art_table 40 1317 0 276 11 0 11 11 0 8 0
art_node 32 256 0 68 2 0 2 2 0 8 0
sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 20 0 10 1 0 1 1 0 8 0
shmpl 112 11 0 1 1 0 1 1 0 8 0
dirhash 1024 385 0 353 5 0 5 5 0 8 0
dino2pl 256 2976 0 1471 95 0 95 95 0 8 0
ffsino 296 2976 0 1471 117 0 117 117 0 8 0
nchpl 144 4055 0 2353 64 0 64 64 0 8 0
rtmask 32 5 0 5 2 1 1 1 0 8 1
vnodes 216 3644 0 0 203 0 203 203 0 8 0
namei 1024 13707 0 13707 2 1 1 2 0 8 1
percpumem 16 96 0 42 1 0 1 1 0 8 0
vcpupl 3968 2 0 1 1 0 1 1 0 8 0
vmpool 840 2 0 1 1 0 1 1 0 8 0
kstatmem 264 92 0 56 3 0 3 3 0 8 0
scsiplug 72 7 0 7 2 1 1 1 0 8 1
scxspl 216 20708 0 20708 7 6 1 6 1 8 1
plimitpl 152 224 0 207 1 0 1 1 0 8 0
sigapl 424 1099 0 1051 7 0 7 7 0 8 0
knotepl 120 573 0 0 18 0 18 18 0 8 0
kqueuepl 224 309 0 298 4 1 3 3 0 8 2
pipepl 344 186 0 159 3 0 3 3 0 8 0
fdescpl 528 1079 0 1047 3 0 3 3 0 8 0
filepl 160 6937 0 6686 28 6 22 22 0 8 11
lockfpl 104 405 0 402 2 0 2 2 0 8 1
lockfspl 48 93 0 90 1 0 1 1 0 8 0
sessionpl 144 28 0 19 1 0 1 1 0 8 0
pgrppl 48 51 0 34 1 0 1 1 0 8 0
ucredpl 104 1241 0 1226 1 0 1 1 0 8 0
zombiepl 144 1189 0 1188 1 0 1 1 0 8 0
processpl 1232 1099 0 1051 5 0 5 5 0 8 0
procpl 664 2251 0 2194 6 0 6 6 0 8 0
sosppl 176 5 0 5 2 1 1 1 0 8 1
sockpl 752 1625 0 1560 27 16 11 20 0 8 4
mcl64k 65536 5 0 0 1 0 1 1 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 116 0 0 15 0 15 15 0 8 1
mcl2k 2048 76 0 0 8 0 8 8 0 8 0
mtagpl 96 73 0 0 2 0 2 2 0 8 0
mbufpl 256 1883 0 0 118 0 118 118 0 8 0
bufpl 280 8432 0 2295 439 0 439 439 0 8 0
anonpl 32 9644 0 0 78 0 78 78 0 246 0
amapchunkpl 152 30511 0 30021 38 4 34 34 0 158 13
amappl16 200 4052 0 4017 31 16 15 18 0 8 7
amappl15 192 6 0 5 1 0 1 1 0 8 0
amappl14 184 9 0 9 2 1 1 1 0 8 1
amappl13 176 448 0 446 1 0 1 1 0 8 0
amappl12 168 1537 0 1493 3 0 3 3 0 8 0
amappl11 160 14 0 14 1 1 0 1 0 8 0
amappl10 152 49 0 34 1 0 1 1 0 8 0
amappl9 144 266 0 266 1 1 0 1 0 8 0
amappl8 136 24 0 22 1 0 1 1 0 8 0
amappl7 128 88 0 87 1 0 1 1 0 8 0
amappl6 120 304 0 289 1 0 1 1 0 8 0
amappl5 112 83 0 73 1 0 1 1 0 8 0
amappl4 104 450 0 418 1 0 1 1 0 8 0
amappl3 96 5716 0 5607 5 1 4 4 0 8 0
amappl2 88 582 0 519 2 0 2 2 0 8 0
amappl1 80 12946 0 12324 15 0 15 15 0 8 0
amappl 88 8284 0 8117 5 0 5 5 0 92 0
uvmvnodes 80 125 0 0 3 0 3 3 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
dma512 512 1 0 1 1 0 1 1 0 8 1
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 15 0 2 1 0 1 1 0 8 0
uaddrrnd 24 1079 0 1047 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1079 0 1047 1 0 1 1 0 8 0
vmmpekpl 168 10649 0 10599 3 0 3 3 0 8 0
vmmpepl 168 76723 0 74753 109 9 100 103 0 357 0
vmsppl 488 1078 0 1047 5 0 5 5 0 8 0
rwobjpl 80 23756 0 22645 31 3 28 30 0 8 0
pdppl 4096 2170 0 2097 104 29 75 84 0 8 2
pvpl 32 18616 0 0 151 1 150 150 0 265 0
pmappl 256 1080 0 1048 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 441 0 36 12 0 12 12 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
in6_addmulti(ffff80003c42ffe8,ffff80000147c800,ffff80003c43005c) at in6_addmulti+0x184 in6_lookupmulti sys/netinet6/in6.c:1013 [inline]
in6_addmulti(ffff80003c42ffe8,ffff80000147c800,ffff80003c43005c) at in6_addmulti+0x184 sys/netinet6/in6.c:1038
in6_joingroup(ffff80000147c800,ffff80003c42ffe8,ffff80003c43005c) at in6_joingroup+0x6c sys/netinet6/in6.c:-1
in6_update_ifa(ffff80000147c800,ffff80003c4300e0,0) at in6_update_ifa+0x1a86 sys/netinet6/in6.c:-1
in6_ifattach_linklocal(ffff80000147c800,0) at in6_ifattach_linklocal+0x33b sys/netinet6/in6_ifattach.c:266
in6_ifattach(ffff80000147c800) at in6_ifattach+0x2d0 sys/netinet6/in6_ifattach.c:384
ifnewlladdr(ffff80000147c800) at ifnewlladdr+0x242 sys/net/if.c:3549
ifioctl(ffff8000015200b0,8020691f,ffff80003c430340,ffff8000fffe6a88) at ifioctl+0x2d3c sys/net/if.c:2385
sys_ioctl(ffff8000fffe6a88,ffff80003c430520,ffff80003c430470) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003c430520) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c430520) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xed3ba1a6ae0, count: -10
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff8000299edff0) 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(ffffffff838c1148) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838c1148) at __mp_lock+0x192 sys/kern/kern_lock.c:165
ktrsyscall(ffff80002a272540,3,18,ffff80002a29e420) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline]
ktrsyscall(ffff80002a272540,3,18,ffff80002a29e420) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183
syscall(ffff80002a29e420) at syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline]
syscall(ffff80002a29e420) at syscall+0x304 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x70457ae42090, count: -7
---
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