uvm_fault: readdoslabel
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syzbot
May 4, 2026, 1:01:32 AMMay 4
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 126c93b16f30 cert regress: update README for tests 14a and..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=132b396a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=4987e9502477b3ae3473
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7a2b6b95fec0/disk-126c93b1.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/297ca7f2792e/bsd-126c93b1.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/fd0d5ff90c8b/kernel-126c93b1.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4987e9...@syzkaller.appspotmail.com
login: uvm_fault(0xffffffff839bd7d8, 0xffff8000261c204c, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at readdoslabel+0x6ec: movzwl 0x4c(%rdi,%rdx,1),%eax
TID PID UID PRFLAGS PFLAGS CPU COMMAND
44364 25453 0 0 0 1 syz-executor
*435360 94235 0 0 0x4000000 0K syz-executor
readdoslabel(fffffd8066f0fc38,ffffffff8214b540,ffff800001607800,0,0) at readdoslabel+0x6ec sys/kern/subr_disk.c:398
readdisklabel(d02,ffffffff8214b540,ffff800001607800,0) at readdisklabel+0x1f6 sys/arch/amd64/amd64/disksubr.c:96
sdgetdisklabel(d01,ffff8000002a2c00,ffff800001607800,0) at sdgetdisklabel+0x897 sys/scsi/sd.c:1169
sdioctl(d01,20006473,ffff80002a7b9a80,1,ffff80003bbd2558) at sdioctl+0x6fb sys/scsi/sd.c:883
VOP_IOCTL(fffffd805ee5e528,20006473,ffff80002a7b9a80,1,fffffd80097fd680,ffff80003bbd2558) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
vn_ioctl(fffffd805f5cbd70,20006473,ffff80002a7b9a80,ffff80003bbd2558) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
sys_ioctl(ffff80003bbd2558,ffff80002a7b9c60,ffff80002a7b9bb0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80002a7b9c60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a7b9c60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x57fc1e800b0, count: 6
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
*cpu0: uvm_fault(0xffffffff839bd7d8, 0xffff8000261c204c, 0, 1) -> d
ddb{0}> trace
readdoslabel(fffffd8066f0fc38,ffffffff8214b540,ffff800001607800,0,0) at readdoslabel+0x6ec sys/kern/subr_disk.c:398
readdisklabel(d02,ffffffff8214b540,ffff800001607800,0) at readdisklabel+0x1f6 sys/arch/amd64/amd64/disksubr.c:96
sdgetdisklabel(d01,ffff8000002a2c00,ffff800001607800,0) at sdgetdisklabel+0x897 sys/scsi/sd.c:1169
sdioctl(d01,20006473,ffff80002a7b9a80,1,ffff80003bbd2558) at sdioctl+0x6fb sys/scsi/sd.c:883
VOP_IOCTL(fffffd805ee5e528,20006473,ffff80002a7b9a80,1,fffffd80097fd680,ffff80003bbd2558) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
vn_ioctl(fffffd805f5cbd70,20006473,ffff80002a7b9a80,ffff80003bbd2558) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
sys_ioctl(ffff80003bbd2558,ffff80002a7b9c60,ffff80002a7b9bb0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80002a7b9c60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a7b9c60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x57fc1e800b0, count: -9
ddb{0}> show registers
rdi 0xffff8000261c2000
rsi 0xffff8000261c2000
rbp 0xffff80002a7b96d0
rbx 0
rdx 0
rcx 0x1
rax 0x41
r8 0
r9 0
r10 0x728f7930d52c35d
r11 0x4f1564b263e0b4ee
r12 0
r13 0x41
r14 0xffff800001607800
r15 0xfffffd8066f0fc38
rip 0xffffffff820a60bc readdoslabel+0x6ec
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a7b9440
ss 0x10
readdoslabel+0x6ec: movzwl 0x4c(%rdi,%rdx,1),%eax
ddb{0}> show proc
PROC (syz-executor) tid=435360 pid=94235 tcnt=4 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=17, usrpri=50, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003bbd3780,0xffff80003bbd2d30
process=0xffff80003c3df510 user=0xffff80002a7b4000, vmspace=0xfffffd800f09f3f0
estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
25453 44364 69456 0 7 0 syz-executor
64076 10263 30203 0 2 0x10 syz-executor
64076 67544 30203 0 2 0x4000010 syz-executor
94235 43103 26210 0 2 0xc80 syz-executor
*94235 435360 26210 0 7 0x4000000 syz-executor
94235 176035 26210 0 3 0x4000080 fsleep syz-executor
94235 347851 26210 0 3 0x4000080 fsleep syz-executor
43200 305561 87712 0 2 0 syz-executor
43200 350601 87712 0 2 0x4000000 syz-executor
4548 504049 39520 0 2 0 syz-executor
4548 205989 39520 0 3 0x4000080 fsleep syz-executor
90689 349039 95028 0 2 0 syz-executor
90689 232182 95028 0 3 0x4000080 sbwait syz-executor
90689 489602 95028 0 3 0x4000080 sbwait syz-executor
90689 194799 95028 0 3 0x4000080 fsleep syz-executor
39520 130360 47003 0 2 0xc82 syz-executor
85283 300044 0 0 3 0x14200 acct acct
41230 168423 1 0 3 0x100083 ttyin getty
95028 315071 47003 0 2 0xc82 syz-executor
26210 18466 47003 0 2 0xc82 syz-executor
87712 503758 47003 0 2 0xc82 syz-executor
30203 202001 47003 0 2 0xc82 syz-executor
69456 200327 47003 0 3 0x82 nanoslp syz-executor
70657 127622 47003 0 2 0x2 syz-executor
65727 121071 47003 0 2 0xc82 syz-executor
47003 493735 16151 0 3 0x82 kqread syz-executor
16151 137101 72899 0 3 0x10008a sigsusp ksh
72899 395103 61962 0 3 0x98 kqread sshd-session
61962 482359 94928 0 3 0x92 kqread sshd-session
94928 37752 1 0 3 0x88 kqread sshd
937 298234 99305 74 3 0x1100092 bpf pflogd
99305 96063 1 0 3 0x80 sbwait pflogd
1654 403011 67865 73 3 0x1100090 kqread syslogd
67865 92666 1 0 3 0x100082 sbwait syslogd
44165 43019 1 0 3 0x100080 kqread resolvd
49875 435691 60155 77 3 0x100092 kqread dhcpleased
80794 117951 60155 77 3 0x100092 kqread dhcpleased
60155 146844 1 0 3 0x80 kqread dhcpleased
2147 516322 0 0 3 0x14200 bored smr
69717 134336 0 0 2 0x14200 zerothread
93492 246099 0 0 3 0x14200 aiodoned aiodoned
84475 67925 0 0 3 0x14200 syncer update
89113 324184 0 0 3 0x14200 cleaner cleaner
28800 521830 0 0 3 0x14200 reaper reaper
34225 471534 0 0 3 0x14200 pgdaemon pagedaemon
99593 257444 0 0 3 0x14200 bored viomb
51865 48217 0 0 3 0x40014200 acpi0 acpi0
14507 229120 0 0 3 0x40014200 idle1
36176 248420 0 0 3 0x14200 bored softnet1
39067 372615 0 0 3 0x14200 bored softnet0
51831 157144 0 0 3 0x14200 bored systqmp
61488 40060 0 0 3 0x14200 bored systq
7954 496800 0 0 3 0x14200 tmoslp softclockmp
68041 357879 0 0 3 0x40014200 tmoslp softclock
13115 434644 0 0 3 0x40014200 idle0
1 125695 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{0}> show all locks
Process 94235 (syz-executor) thread 0xffff80003bbd2558 (435360)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8397ea40)
#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 sleep_finish+0x2d8 sys/kern/kern_synch.c:369
#3 biowait+0xc6 sys/kern/vfs_bio.c:1242
#4 readdoslabel+0x675 readdisksector sys/kern/subr_disk.c:298 [inline]
#4 readdoslabel+0x675 sys/kern/subr_disk.c:390
#5 readdisklabel+0x1f6 sys/arch/amd64/amd64/disksubr.c:96
#6 sdgetdisklabel+0x897 sys/scsi/sd.c:1169
#7 sdioctl+0x6fb sys/scsi/sd.c:883
#8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
#9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
#10 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#11 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#11 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#12 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11078 12172K 12306K 166960K 12697 0
pcb 18 14K 16K 166960K 232 0
rtable 214 8K 8K 166960K 914 0
pf 33 17K 18K 166960K 95 0
ifaddr 39 7K 7K 166960K 119 0
ifgroup 51 2K 2K 166960K 139 0
sysctl 4 1K 9K 166960K 19 0
counters 68 36K 37K 166960K 122 0
ioctlops 0 0K 4K 166960K 1811 0
iov 0 0K 16K 166960K 24 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1325 83K 83K 166960K 2064 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 10 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 45 0
dirhash 12 2K 2K 166960K 27 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 228K 166960K 1081 0
sigio 0 0K 0K 166960K 14 0
proc 72 115K 180K 166960K 1022 0
subproc 72 4K 4K 166960K 207 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 1 0K 0K 166960K 473 0
in_multi 88 6K 6K 166960K 280 0
ether_multi 2 0K 0K 166960K 4 0
mrt 1 0K 0K 166960K 20 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 79 360K 360K 166960K 79 0
exec 0 0K 1K 166960K 691 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 230 159K 185K 166960K 10535 0
UVM aobj 19 6K 6K 166960K 21 0
pinsyscall 42 84K 106K 166960K 2625 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 28 0
NDP 13 0K 1K 166960K 80 0
temp 59 9081K 9147K 166960K 31361 0
kqueue 13 20K 29K 166960K 143 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 120 104 0 101 1 0 1 1 0 8 0
rtentry 176 307 0 216 5 0 5 5 0 8 0
unpcb 144 527 0 508 6 5 1 6 0 8 0
syncache 336 13 0 13 2 1 1 1 0 8 1
tcpqe 32 1 0 1 1 1 0 1 0 8 0
tcpcb 736 302 0 294 13 6 7 7 0 8 5
arp 136 61 0 42 1 0 1 1 0 8 0
inpcb 328 1031 0 1017 17 10 7 12 0 8 4
nd6 152 70 0 49 1 0 1 1 0 8 0
pkpcb 40 5 0 5 2 1 1 1 0 8 1
kcovpl 48 23 0 15 1 0 1 1 0 8 0
mppekey 1024 1 0 1 1 1 0 1 0 8 0
ppxss 1192 7 0 7 1 0 1 1 0 8 1
pppxif 1576 3 0 3 2 1 1 1 0 8 1
pffrag 232 7 0 0 1 0 1 1 0 482 0
pffrnode 88 7 0 0 1 0 1 1 0 8 0
pffrent 40 10 0 3 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
pfsrclim 320 1 0 1 1 1 0 1 0 8 0
pfstitem 24 60 0 17 1 0 1 1 0 8 0
pfstkey 128 68 0 25 2 0 2 2 0 8 0
pfstate 448 63 0 21 6 0 6 6 0 8 0
pfrule 1360 22 0 17 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 1277 0 868 29 2 27 29 0 8 1
art_table 40 1279 0 868 5 0 5 5 0 8 0
art_node 32 306 0 230 1 0 1 1 0 8 0
sysvmsgpl 40 13 0 4 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 42 0 32 1 0 1 1 0 8 0
shmpl 112 18 0 2 1 0 1 1 0 8 0
dirhash 1024 27 0 10 3 0 3 3 0 8 0
dino2pl 256 2903 0 1408 94 0 94 94 0 8 0
ffsino 296 2903 0 1408 116 0 116 116 0 8 0
nchpl 144 4054 0 2304 65 0 65 65 0 8 0
rtmask 32 1 0 1 1 1 0 1 0 8 0
vnodes 216 3354 0 0 187 0 187 187 0 8 0
namei 1024 14029 0 14029 2 1 1 2 0 8 1
percpumem 16 76 0 27 1 0 1 1 0 8 0
kstatmem 264 69 0 44 2 0 2 2 0 8 0
scsiplug 72 1 0 1 1 1 0 1 0 8 0
scxspl 216 18194 0 18194 11 10 1 8 1 8 1
plimitpl 152 107 0 89 1 0 1 1 0 8 0
sigapl 424 1347 0 1299 7 1 6 7 0 8 0
knotepl 120 541 0 0 17 0 17 17 0 8 0
kqueuepl 224 179 0 170 1 0 1 1 0 8 0
pipepl 344 252 0 225 6 3 3 6 0 8 0
fdescpl 528 1329 0 1298 3 0 3 3 0 8 0
filepl 160 6662 0 6434 20 7 13 16 0 8 2
lockfpl 104 290 0 287 1 0 1 1 0 8 0
lockfspl 48 71 0 68 1 0 1 1 0 8 0
sessionpl 144 68 0 59 1 0 1 1 0 8 0
pgrppl 48 91 0 74 1 0 1 1 0 8 0
ucredpl 104 1070 0 1056 1 0 1 1 0 8 0
zombiepl 144 1300 0 1299 1 0 1 1 0 8 0
processpl 1232 1347 0 1299 5 0 5 5 0 8 0
procpl 664 2483 0 2426 6 0 6 6 0 8 0
sosppl 176 7 0 7 2 1 1 1 0 8 1
sockpl 752 1680 0 1644 28 17 11 17 0 8 5
mcl64k 65536 9 0 0 2 0 2 2 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 5 0 0 1 0 1 1 0 8 0
mcl9k128 9344 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 5 0 0 1 0 1 1 0 8 0
mcl4k 4096 124 0 0 16 0 16 16 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 33 0 0 5 0 5 5 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 244 0 0 15 0 15 15 0 8 0
bufpl 280 6713 0 584 438 0 438 438 0 8 0
anonpl 32 9764 0 0 80 1 79 79 0 246 0
amapchunkpl 152 32712 0 32248 28 3 25 27 0 158 5
amappl16 200 4248 0 4217 15 7 8 15 0 8 0
amappl15 192 11 0 11 2 2 0 1 0 8 0
amappl14 184 612 0 611 1 0 1 1 0 8 0
amappl13 176 156 0 144 1 0 1 1 0 8 0
amappl12 168 1644 0 1614 2 0 2 2 0 8 0
amappl11 160 8 0 8 1 1 0 1 0 8 0
amappl10 152 69 0 55 1 0 1 1 0 8 0
amappl9 144 270 0 269 1 0 1 1 0 8 0
amappl8 136 160 0 158 1 0 1 1 0 8 0
amappl7 128 205 0 191 1 0 1 1 0 8 0
amappl6 120 308 0 305 1 0 1 1 0 8 0
amappl5 112 100 0 89 1 0 1 1 0 8 0
amappl4 104 352 0 332 1 0 1 1 0 8 0
amappl3 96 6707 0 6597 4 0 4 4 0 8 0
amappl2 88 711 0 648 2 0 2 2 0 8 0
amappl1 80 16225 0 15631 19 3 16 18 0 8 1
amappl 88 9430 0 9271 6 1 5 5 0 92 0
uvmvnodes 80 108 0 0 3 0 3 3 0 8 0
dma4096 4096 2 0 2 2 2 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 128 253 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 19 0 18 1 0 1 1 0 8 0
aobjpl 72 20 0 2 1 0 1 1 0 8 0
uaddrrnd 24 1329 0 1298 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1329 0 1298 1 0 1 1 0 8 0
vmmpekpl 168 12631 0 12582 3 0 3 3 0 8 0
vmmpepl 168 94184 0 92283 114 20 94 114 0 357 5
vmsppl 488 1328 0 1298 5 0 5 5 0 8 0
rwobjpl 80 28218 0 27165 32 3 29 32 0 8 0
pdppl 4096 2665 0 2596 127 54 73 85 0 8 4
pvpl 32 19055 0 0 154 0 154 154 0 265 0
pmappl 256 1328 0 1298 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 328 0 69 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
readdoslabel(fffffd8066f0fc38,ffffffff8214b540,ffff800001607800,0,0) at readdoslabel+0x6ec sys/kern/subr_disk.c:398
readdisklabel(d02,ffffffff8214b540,ffff800001607800,0) at readdisklabel+0x1f6 sys/arch/amd64/amd64/disksubr.c:96
sdgetdisklabel(d01,ffff8000002a2c00,ffff800001607800,0) at sdgetdisklabel+0x897 sys/scsi/sd.c:1169
sdioctl(d01,20006473,ffff80002a7b9a80,1,ffff80003bbd2558) at sdioctl+0x6fb sys/scsi/sd.c:883
VOP_IOCTL(fffffd805ee5e528,20006473,ffff80002a7b9a80,1,fffffd80097fd680,ffff80003bbd2558) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
vn_ioctl(fffffd805f5cbd70,20006473,ffff80002a7b9a80,ffff80003bbd2558) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
sys_ioctl(ffff80003bbd2558,ffff80002a7b9c60,ffff80002a7b9bb0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80002a7b9c60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a7b9c60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x57fc1e800b0, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff8000299adff0) 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
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x38 sys/dev/kcov.c:-1
__mp_lock(ffffffff8397e240) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff8397e240) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173
syscall(ffff80002a79b590) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80002a79b590) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x71b5b74519a0, count: 8
ddb{1}> trace
x86_ipi_db(ffff8000299adff0) 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
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x38 sys/dev/kcov.c:-1
__mp_lock(ffffffff8397e240) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff8397e240) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173
syscall(ffff80002a79b590) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80002a79b590) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x71b5b74519a0, count: -7
---
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syzbot found the following issue on:
HEAD commit: 126c93b16f30 cert regress: update README for tests 14a and..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=132b396a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=4987e9502477b3ae3473
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7a2b6b95fec0/disk-126c93b1.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/297ca7f2792e/bsd-126c93b1.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/fd0d5ff90c8b/kernel-126c93b1.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4987e9...@syzkaller.appspotmail.com
login: uvm_fault(0xffffffff839bd7d8, 0xffff8000261c204c, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at readdoslabel+0x6ec: movzwl 0x4c(%rdi,%rdx,1),%eax
TID PID UID PRFLAGS PFLAGS CPU COMMAND
44364 25453 0 0 0 1 syz-executor
*435360 94235 0 0 0x4000000 0K syz-executor
readdoslabel(fffffd8066f0fc38,ffffffff8214b540,ffff800001607800,0,0) at readdoslabel+0x6ec sys/kern/subr_disk.c:398
readdisklabel(d02,ffffffff8214b540,ffff800001607800,0) at readdisklabel+0x1f6 sys/arch/amd64/amd64/disksubr.c:96
sdgetdisklabel(d01,ffff8000002a2c00,ffff800001607800,0) at sdgetdisklabel+0x897 sys/scsi/sd.c:1169
sdioctl(d01,20006473,ffff80002a7b9a80,1,ffff80003bbd2558) at sdioctl+0x6fb sys/scsi/sd.c:883
VOP_IOCTL(fffffd805ee5e528,20006473,ffff80002a7b9a80,1,fffffd80097fd680,ffff80003bbd2558) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
vn_ioctl(fffffd805f5cbd70,20006473,ffff80002a7b9a80,ffff80003bbd2558) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
sys_ioctl(ffff80003bbd2558,ffff80002a7b9c60,ffff80002a7b9bb0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80002a7b9c60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a7b9c60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x57fc1e800b0, count: 6
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
*cpu0: uvm_fault(0xffffffff839bd7d8, 0xffff8000261c204c, 0, 1) -> d
ddb{0}> trace
readdoslabel(fffffd8066f0fc38,ffffffff8214b540,ffff800001607800,0,0) at readdoslabel+0x6ec sys/kern/subr_disk.c:398
readdisklabel(d02,ffffffff8214b540,ffff800001607800,0) at readdisklabel+0x1f6 sys/arch/amd64/amd64/disksubr.c:96
sdgetdisklabel(d01,ffff8000002a2c00,ffff800001607800,0) at sdgetdisklabel+0x897 sys/scsi/sd.c:1169
sdioctl(d01,20006473,ffff80002a7b9a80,1,ffff80003bbd2558) at sdioctl+0x6fb sys/scsi/sd.c:883
VOP_IOCTL(fffffd805ee5e528,20006473,ffff80002a7b9a80,1,fffffd80097fd680,ffff80003bbd2558) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
vn_ioctl(fffffd805f5cbd70,20006473,ffff80002a7b9a80,ffff80003bbd2558) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
sys_ioctl(ffff80003bbd2558,ffff80002a7b9c60,ffff80002a7b9bb0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80002a7b9c60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a7b9c60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x57fc1e800b0, count: -9
ddb{0}> show registers
rdi 0xffff8000261c2000
rsi 0xffff8000261c2000
rbp 0xffff80002a7b96d0
rbx 0
rdx 0
rcx 0x1
rax 0x41
r8 0
r9 0
r10 0x728f7930d52c35d
r11 0x4f1564b263e0b4ee
r12 0
r13 0x41
r14 0xffff800001607800
r15 0xfffffd8066f0fc38
rip 0xffffffff820a60bc readdoslabel+0x6ec
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a7b9440
ss 0x10
readdoslabel+0x6ec: movzwl 0x4c(%rdi,%rdx,1),%eax
ddb{0}> show proc
PROC (syz-executor) tid=435360 pid=94235 tcnt=4 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=17, usrpri=50, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003bbd3780,0xffff80003bbd2d30
process=0xffff80003c3df510 user=0xffff80002a7b4000, vmspace=0xfffffd800f09f3f0
estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
25453 44364 69456 0 7 0 syz-executor
64076 10263 30203 0 2 0x10 syz-executor
64076 67544 30203 0 2 0x4000010 syz-executor
94235 43103 26210 0 2 0xc80 syz-executor
*94235 435360 26210 0 7 0x4000000 syz-executor
94235 176035 26210 0 3 0x4000080 fsleep syz-executor
94235 347851 26210 0 3 0x4000080 fsleep syz-executor
43200 305561 87712 0 2 0 syz-executor
43200 350601 87712 0 2 0x4000000 syz-executor
4548 504049 39520 0 2 0 syz-executor
4548 205989 39520 0 3 0x4000080 fsleep syz-executor
90689 349039 95028 0 2 0 syz-executor
90689 232182 95028 0 3 0x4000080 sbwait syz-executor
90689 489602 95028 0 3 0x4000080 sbwait syz-executor
90689 194799 95028 0 3 0x4000080 fsleep syz-executor
39520 130360 47003 0 2 0xc82 syz-executor
85283 300044 0 0 3 0x14200 acct acct
41230 168423 1 0 3 0x100083 ttyin getty
95028 315071 47003 0 2 0xc82 syz-executor
26210 18466 47003 0 2 0xc82 syz-executor
87712 503758 47003 0 2 0xc82 syz-executor
30203 202001 47003 0 2 0xc82 syz-executor
69456 200327 47003 0 3 0x82 nanoslp syz-executor
70657 127622 47003 0 2 0x2 syz-executor
65727 121071 47003 0 2 0xc82 syz-executor
47003 493735 16151 0 3 0x82 kqread syz-executor
16151 137101 72899 0 3 0x10008a sigsusp ksh
72899 395103 61962 0 3 0x98 kqread sshd-session
61962 482359 94928 0 3 0x92 kqread sshd-session
94928 37752 1 0 3 0x88 kqread sshd
937 298234 99305 74 3 0x1100092 bpf pflogd
99305 96063 1 0 3 0x80 sbwait pflogd
1654 403011 67865 73 3 0x1100090 kqread syslogd
67865 92666 1 0 3 0x100082 sbwait syslogd
44165 43019 1 0 3 0x100080 kqread resolvd
49875 435691 60155 77 3 0x100092 kqread dhcpleased
80794 117951 60155 77 3 0x100092 kqread dhcpleased
60155 146844 1 0 3 0x80 kqread dhcpleased
2147 516322 0 0 3 0x14200 bored smr
69717 134336 0 0 2 0x14200 zerothread
93492 246099 0 0 3 0x14200 aiodoned aiodoned
84475 67925 0 0 3 0x14200 syncer update
89113 324184 0 0 3 0x14200 cleaner cleaner
28800 521830 0 0 3 0x14200 reaper reaper
34225 471534 0 0 3 0x14200 pgdaemon pagedaemon
99593 257444 0 0 3 0x14200 bored viomb
51865 48217 0 0 3 0x40014200 acpi0 acpi0
14507 229120 0 0 3 0x40014200 idle1
36176 248420 0 0 3 0x14200 bored softnet1
39067 372615 0 0 3 0x14200 bored softnet0
51831 157144 0 0 3 0x14200 bored systqmp
61488 40060 0 0 3 0x14200 bored systq
7954 496800 0 0 3 0x14200 tmoslp softclockmp
68041 357879 0 0 3 0x40014200 tmoslp softclock
13115 434644 0 0 3 0x40014200 idle0
1 125695 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{0}> show all locks
Process 94235 (syz-executor) thread 0xffff80003bbd2558 (435360)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8397ea40)
#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 sleep_finish+0x2d8 sys/kern/kern_synch.c:369
#3 biowait+0xc6 sys/kern/vfs_bio.c:1242
#4 readdoslabel+0x675 readdisksector sys/kern/subr_disk.c:298 [inline]
#4 readdoslabel+0x675 sys/kern/subr_disk.c:390
#5 readdisklabel+0x1f6 sys/arch/amd64/amd64/disksubr.c:96
#6 sdgetdisklabel+0x897 sys/scsi/sd.c:1169
#7 sdioctl+0x6fb sys/scsi/sd.c:883
#8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
#9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
#10 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#11 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#11 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#12 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11078 12172K 12306K 166960K 12697 0
pcb 18 14K 16K 166960K 232 0
rtable 214 8K 8K 166960K 914 0
pf 33 17K 18K 166960K 95 0
ifaddr 39 7K 7K 166960K 119 0
ifgroup 51 2K 2K 166960K 139 0
sysctl 4 1K 9K 166960K 19 0
counters 68 36K 37K 166960K 122 0
ioctlops 0 0K 4K 166960K 1811 0
iov 0 0K 16K 166960K 24 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1325 83K 83K 166960K 2064 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 10 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 45 0
dirhash 12 2K 2K 166960K 27 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 228K 166960K 1081 0
sigio 0 0K 0K 166960K 14 0
proc 72 115K 180K 166960K 1022 0
subproc 72 4K 4K 166960K 207 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 1 0K 0K 166960K 473 0
in_multi 88 6K 6K 166960K 280 0
ether_multi 2 0K 0K 166960K 4 0
mrt 1 0K 0K 166960K 20 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 79 360K 360K 166960K 79 0
exec 0 0K 1K 166960K 691 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 230 159K 185K 166960K 10535 0
UVM aobj 19 6K 6K 166960K 21 0
pinsyscall 42 84K 106K 166960K 2625 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 28 0
NDP 13 0K 1K 166960K 80 0
temp 59 9081K 9147K 166960K 31361 0
kqueue 13 20K 29K 166960K 143 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 120 104 0 101 1 0 1 1 0 8 0
rtentry 176 307 0 216 5 0 5 5 0 8 0
unpcb 144 527 0 508 6 5 1 6 0 8 0
syncache 336 13 0 13 2 1 1 1 0 8 1
tcpqe 32 1 0 1 1 1 0 1 0 8 0
tcpcb 736 302 0 294 13 6 7 7 0 8 5
arp 136 61 0 42 1 0 1 1 0 8 0
inpcb 328 1031 0 1017 17 10 7 12 0 8 4
nd6 152 70 0 49 1 0 1 1 0 8 0
pkpcb 40 5 0 5 2 1 1 1 0 8 1
kcovpl 48 23 0 15 1 0 1 1 0 8 0
mppekey 1024 1 0 1 1 1 0 1 0 8 0
ppxss 1192 7 0 7 1 0 1 1 0 8 1
pppxif 1576 3 0 3 2 1 1 1 0 8 1
pffrag 232 7 0 0 1 0 1 1 0 482 0
pffrnode 88 7 0 0 1 0 1 1 0 8 0
pffrent 40 10 0 3 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
pfsrclim 320 1 0 1 1 1 0 1 0 8 0
pfstitem 24 60 0 17 1 0 1 1 0 8 0
pfstkey 128 68 0 25 2 0 2 2 0 8 0
pfstate 448 63 0 21 6 0 6 6 0 8 0
pfrule 1360 22 0 17 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 1277 0 868 29 2 27 29 0 8 1
art_table 40 1279 0 868 5 0 5 5 0 8 0
art_node 32 306 0 230 1 0 1 1 0 8 0
sysvmsgpl 40 13 0 4 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 42 0 32 1 0 1 1 0 8 0
shmpl 112 18 0 2 1 0 1 1 0 8 0
dirhash 1024 27 0 10 3 0 3 3 0 8 0
dino2pl 256 2903 0 1408 94 0 94 94 0 8 0
ffsino 296 2903 0 1408 116 0 116 116 0 8 0
nchpl 144 4054 0 2304 65 0 65 65 0 8 0
rtmask 32 1 0 1 1 1 0 1 0 8 0
vnodes 216 3354 0 0 187 0 187 187 0 8 0
namei 1024 14029 0 14029 2 1 1 2 0 8 1
percpumem 16 76 0 27 1 0 1 1 0 8 0
kstatmem 264 69 0 44 2 0 2 2 0 8 0
scsiplug 72 1 0 1 1 1 0 1 0 8 0
scxspl 216 18194 0 18194 11 10 1 8 1 8 1
plimitpl 152 107 0 89 1 0 1 1 0 8 0
sigapl 424 1347 0 1299 7 1 6 7 0 8 0
knotepl 120 541 0 0 17 0 17 17 0 8 0
kqueuepl 224 179 0 170 1 0 1 1 0 8 0
pipepl 344 252 0 225 6 3 3 6 0 8 0
fdescpl 528 1329 0 1298 3 0 3 3 0 8 0
filepl 160 6662 0 6434 20 7 13 16 0 8 2
lockfpl 104 290 0 287 1 0 1 1 0 8 0
lockfspl 48 71 0 68 1 0 1 1 0 8 0
sessionpl 144 68 0 59 1 0 1 1 0 8 0
pgrppl 48 91 0 74 1 0 1 1 0 8 0
ucredpl 104 1070 0 1056 1 0 1 1 0 8 0
zombiepl 144 1300 0 1299 1 0 1 1 0 8 0
processpl 1232 1347 0 1299 5 0 5 5 0 8 0
procpl 664 2483 0 2426 6 0 6 6 0 8 0
sosppl 176 7 0 7 2 1 1 1 0 8 1
sockpl 752 1680 0 1644 28 17 11 17 0 8 5
mcl64k 65536 9 0 0 2 0 2 2 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 5 0 0 1 0 1 1 0 8 0
mcl9k128 9344 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 5 0 0 1 0 1 1 0 8 0
mcl4k 4096 124 0 0 16 0 16 16 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 33 0 0 5 0 5 5 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 244 0 0 15 0 15 15 0 8 0
bufpl 280 6713 0 584 438 0 438 438 0 8 0
anonpl 32 9764 0 0 80 1 79 79 0 246 0
amapchunkpl 152 32712 0 32248 28 3 25 27 0 158 5
amappl16 200 4248 0 4217 15 7 8 15 0 8 0
amappl15 192 11 0 11 2 2 0 1 0 8 0
amappl14 184 612 0 611 1 0 1 1 0 8 0
amappl13 176 156 0 144 1 0 1 1 0 8 0
amappl12 168 1644 0 1614 2 0 2 2 0 8 0
amappl11 160 8 0 8 1 1 0 1 0 8 0
amappl10 152 69 0 55 1 0 1 1 0 8 0
amappl9 144 270 0 269 1 0 1 1 0 8 0
amappl8 136 160 0 158 1 0 1 1 0 8 0
amappl7 128 205 0 191 1 0 1 1 0 8 0
amappl6 120 308 0 305 1 0 1 1 0 8 0
amappl5 112 100 0 89 1 0 1 1 0 8 0
amappl4 104 352 0 332 1 0 1 1 0 8 0
amappl3 96 6707 0 6597 4 0 4 4 0 8 0
amappl2 88 711 0 648 2 0 2 2 0 8 0
amappl1 80 16225 0 15631 19 3 16 18 0 8 1
amappl 88 9430 0 9271 6 1 5 5 0 92 0
uvmvnodes 80 108 0 0 3 0 3 3 0 8 0
dma4096 4096 2 0 2 2 2 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 128 253 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 19 0 18 1 0 1 1 0 8 0
aobjpl 72 20 0 2 1 0 1 1 0 8 0
uaddrrnd 24 1329 0 1298 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1329 0 1298 1 0 1 1 0 8 0
vmmpekpl 168 12631 0 12582 3 0 3 3 0 8 0
vmmpepl 168 94184 0 92283 114 20 94 114 0 357 5
vmsppl 488 1328 0 1298 5 0 5 5 0 8 0
rwobjpl 80 28218 0 27165 32 3 29 32 0 8 0
pdppl 4096 2665 0 2596 127 54 73 85 0 8 4
pvpl 32 19055 0 0 154 0 154 154 0 265 0
pmappl 256 1328 0 1298 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 328 0 69 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
readdoslabel(fffffd8066f0fc38,ffffffff8214b540,ffff800001607800,0,0) at readdoslabel+0x6ec sys/kern/subr_disk.c:398
readdisklabel(d02,ffffffff8214b540,ffff800001607800,0) at readdisklabel+0x1f6 sys/arch/amd64/amd64/disksubr.c:96
sdgetdisklabel(d01,ffff8000002a2c00,ffff800001607800,0) at sdgetdisklabel+0x897 sys/scsi/sd.c:1169
sdioctl(d01,20006473,ffff80002a7b9a80,1,ffff80003bbd2558) at sdioctl+0x6fb sys/scsi/sd.c:883
VOP_IOCTL(fffffd805ee5e528,20006473,ffff80002a7b9a80,1,fffffd80097fd680,ffff80003bbd2558) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
vn_ioctl(fffffd805f5cbd70,20006473,ffff80002a7b9a80,ffff80003bbd2558) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
sys_ioctl(ffff80003bbd2558,ffff80002a7b9c60,ffff80002a7b9bb0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80002a7b9c60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a7b9c60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x57fc1e800b0, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff8000299adff0) 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
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x38 sys/dev/kcov.c:-1
__mp_lock(ffffffff8397e240) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff8397e240) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173
syscall(ffff80002a79b590) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80002a79b590) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x71b5b74519a0, count: 8
ddb{1}> trace
x86_ipi_db(ffff8000299adff0) 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
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x38 sys/dev/kcov.c:-1
__mp_lock(ffffffff8397e240) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff8397e240) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173
syscall(ffff80002a79b590) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80002a79b590) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x71b5b74519a0, count: -7
---
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