uvm_fault(0xffffffff83aa3308, 0xffff80000167b000, 0, 2) -> e
kernel: page fault trap, code=2
Stopped at sysctl_sysvipc+0x539: repe movsq (%rsi),%es:(%rdi)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*521144 67969 32767 0x10 0x4000000 0K syz-executor
415304 38050 32767 0x10000010 0 1 syz-executor
sysctl_sysvipc(ffff80002ab768f8,1,200000000100,ffff80002ab76928) at sysctl_sysvipc+0x539 sys/kern/kern_sysctl.c:2779
kern_sysctl(ffff80002ab768f4,2,200000000100,ffff80002ab76928,0,37,ab1061c86840ab7e) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:736
sys_sysctl(ffff800045fef770,ffff80002ab76a60,ffff80002ab769b0) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff80002ab76a60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002ab76a60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb45e7161eb0, count: 10
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(0xffffffff83aa3308, 0xffff80000167b000, 0, 2) -> e
ddb{0}> show kasan
No such command
ddb{0}> trace
sysctl_sysvipc(ffff80002ab768f8,1,200000000100,ffff80002ab76928) at sysctl_sysvipc+0x539 sys/kern/kern_sysctl.c:2779
kern_sysctl(ffff80002ab768f4,2,200000000100,ffff80002ab76928,0,37,ab1061c86840ab7e) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:736
sys_sysctl(ffff800045fef770,ffff80002ab76a60,ffff80002ab769b0) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff80002ab76a60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002ab76a60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb45e7161eb0, count: -5
ddb{0}> show registers
rdi 0xffff80000167b000
rsi 0xfffff08068c2f850
rbp 0xffff80002ab766e0
rbx 0x4
rdx 0xffff80002a371000
rcx 0xc
rax 0xffffffff819bfeb5 sysctl_sysvipc+0x525
r8 0xffff80002ab76928
r9 0
r10 0x7c3f2a9a6d6fb02
r11 0x236387e2cf9f7ff6
r12 0xfffffffffffff4f8
r13 0xfffff08068c2f850
r14 0x1b
r15 0xffff80000167b000
rip 0xffffffff819bfec9 sysctl_sysvipc+0x539
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002ab76650
ss 0x10
sysctl_sysvipc+0x539: repe movsq (%rsi),%es:(%rdi)
ddb{0}> show proc
PROC (syz-executor) tid=521144 pid=67969 tcnt=2 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
runpri=32, usrpri=77, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003c3f6030,0xffffffff83a76e98
process=0xffff80003c3cd360 user=0xffff80002ab71000, vmspace=0xfffff0806d102028
estcpu=27, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
67969 463562 53881 32767 2 0x10 0 syz-executor
*67969 521144 53881 32767 7 0x10 0x4000000 syz-executor
61274 239132 45654 32767 3 0x10 0x80 piperd syz-executor
45654 346862 36050 0 3 0x2 0x80 wait syz-executor
59402 465042 65296 32767 3 0x10 0x80 piperd syz-executor
75296 394207 8681 32767 2 0x10 0 syz-executor
33593 223638 4025 32767 3 0x10 0x80 piperd syz-executor
53881 271527 11764 32767 3 0x10 0x80 nanoslp syz-executor
38050 415304 84405 32767 7 0x10000010 0 syz-executor
26729 413598 13658 32767 3 0x10 0x80 piperd syz-executor
65296 422034 36050 0 3 0x2 0x80 wait syz-executor
4025 476257 36050 0 3 0x2 0x80 wait syz-executor
84405 13492 36050 0 3 0x2 0x80 wait syz-executor
8681 420839 36050 0 3 0x2 0x80 wait syz-executor
13658 295272 36050 0 3 0x2 0x80 wait syz-executor
11764 21769 36050 0 3 0x2 0x80 wait syz-executor
36050 518547 33512 0 3 0x2 0x80 nanoslp syz-executor
33512 136987 61220 0 3 0x100002 0x88 sigsusp ksh
61220 198055 61322 0 3 0x10 0x88 kqread sshd-session
61322 73480 41291 0 3 0x12 0x80 kqread sshd-session
90635 472931 1 0 3 0x100003 0x80 ttyin getty
41291 466540 1 0 3 0 0x88 kqread sshd
95363 512076 57771 73 3 0x1100010 0x80 kqread syslogd
57771 165197 1 0 3 0x100002 0x80 sbwait syslogd
66257 10655 1 0 3 0x100000 0x80 kqread resolvd
63540 122656 63742 77 3 0x100012 0x80 kqread dhcpleased
16961 196902 63742 77 3 0x100012 0x80 kqread dhcpleased
63742 190417 1 0 3 0 0x80 kqread dhcpleased
67926 189480 0 0 3 0x14000 0x200 bored smr
93586 2765 0 0 3 0x14000 0x200 pgzero zerothread
73513 315698 0 0 3 0x14000 0x200 aiodoned aiodoned
32019 419862 0 0 3 0x14000 0x200 syncer update
2633 244906 0 0 3 0x14000 0x200 cleaner cleaner
40742 134813 0 0 3 0x14000 0x200 reaper reaper
15501 123939 0 0 3 0x14000 0x200 pgdaemon pagedaemon
60912 468788 0 0 3 0x14000 0x200 bored viomb
71889 30510 0 0 3 0x14000 0x40000200 acpi0 acpi0
63560 296435 0 0 3 0x14000 0x40000200 idle1
75624 154644 0 0 3 0x14000 0x200 bored softnet1
55266 489683 0 0 3 0x14000 0x200 bored softnet0
29309 360230 0 0 3 0x14000 0x200 bored systqmp
12780 436984 0 0 3 0x14000 0x200 bored systq
36835 279579 0 0 3 0x14000 0x200 tmoslp softclockmp
98585 235521 0 0 3 0x14000 0x40000200 tmoslp softclock
24644 90720 0 0 3 0x14000 0x40000200 idle0
1 70393 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{0}> show all locks
Process 67969 (syz-executor) thread 0xffff800045fef770 (521144)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83aa48c0)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 sysctl_sysvipc+0x4b5 sys/kern/kern_sysctl.c:-1
#2 kern_sysctl+0x139 sys/kern/kern_sysctl.c:736
#3 sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
#4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#5 Xsyscall+0x128
Process 75296 (syz-executor) thread 0xffff800045feefa8 (394207)
exclusive rrwlock inode r = 0 (0xfffff08072409dd0)
#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+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5 vget+0x2a2 sys/kern/vfs_subr.c:692
#6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
#7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
#8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478
#9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
#11 namei+0x7c5 sys/kern/vfs_lookup.c:250
#12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807
#13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffff0806dc31550)
#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+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431
#6 namei+0x7c5 sys/kern/vfs_lookup.c:250
#7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807
#8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#9 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11054 12017K 12034K 166960K 12151 0
pcb 17 12K 12K 166960K 17 0
rtable 219 6K 7K 166960K 403 0
pf 29 16K 16K 166960K 33 0
ifaddr 38 6K 7K 166960K 48 0
ifgroup 46 2K 2K 166960K 54 0
sysctl 2 1K 9K 166960K 7 0
counters 68 36K 37K 166960K 72 0
ioctlops 0 0K 4K 166960K 39 0
iov 0 0K 5K 166960K 76 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1288 81K 81K 166960K 1561 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 12 0K 1K 166960K 20 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1734 201K 291K 166960K 11964 0
file desc 17 61K 125K 166960K 467 0
sigio 0 0K 0K 166960K 6 0
proc 58 99K 147K 166960K 564 0
subproc 63 3K 4K 166960K 261 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 63 0
in_multi 88 6K 7K 166960K 123 0
ether_multi 1 0K 0K 166960K 3 0
mrt 1 0K 0K 166960K 17 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 103 466K 466K 166960K 103 0
exec 0 0K 1K 166960K 441 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 184 149K 181K 166960K 5579 0
UVM aobj 81 3K 3K 166960K 84 0
pinsyscall 38 76K 112K 166960K 1633 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 17 0
NDP 10 0K 2K 166960K 30 0
temp 37 9119K 9123K 166960K 4758 0
kqueue 13 20K 35K 166960K 87 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 28 0 0 1 0 1 1 0 8 0
rtpcb 120 60 0 57 1 0 1 1 0 8 0
rtentry 176 126 0 25 6 0 6 6 0 8 0
unpcb 144 191 0 176 1 0 1 1 0 8 0
syncache 336 8 0 8 2 1 1 1 0 8 1
tcpqe 32 1 0 1 1 1 0 1 0 8 0
tcpcb 736 198 0 191 7 5 2 7 0 8 1
arp 136 21 0 4 1 0 1 1 0 8 0
ipq 40 1 0 0 1 0 1 1 0 8 0
ipqe 40 1 0 0 1 0 1 1 0 8 0
inpcb 328 443 0 430 7 5 2 7 0 8 0
ip6q 72 1 0 0 1 0 1 1 0 8 0
ip6af 40 1 0 0 1 0 1 1 0 8 0
nd6 152 30 0 8 1 0 1 1 0 8 0
kcovpl 48 29 0 22 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 517 0 105 30 1 29 30 0 8 1
art_table 40 518 0 105 5 0 5 5 0 8 0
art_node 32 126 0 34 1 0 1 1 0 8 0
sysvmsgpl 40 5 0 4 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 72 14 0 4 1 0 1 1 0 8 0
shmpl 112 81 0 3 3 0 3 3 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1919 0 433 93 0 93 93 0 8 0
ffsino 296 1919 0 433 115 0 115 115 0 8 0
nchpl 144 2452 0 745 64 0 64 64 0 8 0
vnodes 216 2189 0 0 122 0 122 122 0 8 0
namei 1024 7981 0 7981 2 1 1 2 0 8 1
percpumem 16 52 0 2 1 0 1 1 0 8 0
kstatmem 264 27 0 4 2 0 2 2 0 8 0
scxspl 216 8418 0 8418 8 7 1 6 1 8 1
plimitpl 152 113 0 91 2 1 1 2 0 8 0
sigapl 424 732 0 686 8 1 7 7 0 8 1
knotepl 120 317 0 0 10 0 10 10 0 8 0
kqueuepl 224 85 0 76 2 1 1 2 0 8 0
pipepl 344 206 0 179 3 0 3 3 0 8 0
fdescpl 528 716 0 687 4 1 3 4 0 8 0
filepl 160 3499 0 3307 11 1 10 11 0 8 0
lockfpl 104 86 0 84 1 0 1 1 0 8 0
lockfspl 48 35 0 33 1 0 1 1 0 8 0
sessionpl 144 71 0 56 1 0 1 1 0 8 0
pgrppl 48 105 0 83 1 0 1 1 0 8 0
ucredpl 104 434 0 416 1 0 1 1 0 8 0
zombiepl 144 687 0 686 1 0 1 1 0 8 0
processpl 1232 732 0 686 5 0 5 5 0 8 0
procpl 664 1104 0 1057 7 1 6 7 0 8 0
sosppl 176 8 0 8 2 2 0 1 0 8 0
sockpl 752 697 0 666 10 5 5 10 0 8 1
mcl64k 65536 5 0 0 1 0 1 1 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl9k128 9344 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 121 0 0 16 0 16 16 0 8 0
mcl2k 2048 20 0 0 3 0 3 3 0 8 0
mextrefs 64 19 0 0 1 0 1 1 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 1184 0 0 74 0 74 74 0 8 0
bufpl 272 2710 0 102 174 0 174 174 0 8 0
anonpl 32 7584 0 0 62 0 62 62 0 247 0
amapchunkpl 152 18088 0 17743 40 5 35 35 0 158 15
amappl16 200 2528 0 2512 16 6 10 13 0 8 8
amappl15 192 4 0 4 1 1 0 1 0 8 0
amappl14 184 425 0 424 1 0 1 1 0 8 0
amappl13 176 123 0 113 1 0 1 1 0 8 0
amappl12 168 975 0 947 2 0 2 2 0 8 0
amappl11 160 3 0 3 1 1 0 1 0 8 0
amappl10 152 59 0 49 1 0 1 1 0 8 0
amappl9 144 283 0 283 1 1 0 1 0 8 0
amappl8 136 99 0 98 1 0 1 1 0 8 0
amappl7 128 149 0 138 1 0 1 1 0 8 0
amappl6 120 163 0 161 1 0 1 1 0 8 0
amappl5 112 109 0 101 1 0 1 1 0 8 0
amappl4 104 287 0 270 1 0 1 1 0 8 0
amappl3 96 3220 0 3135 5 1 4 4 0 8 0
amappl2 88 581 0 529 2 0 2 2 0 8 0
amappl1 80 12940 0 12392 18 2 16 16 0 8 1
amappl 88 4757 0 4634 5 0 5 5 0 92 0
uvmvnodes 80 114 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
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 83 0 3 2 0 2 2 0 8 0
uaddrrnd 24 716 0 687 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 716 0 687 1 0 1 1 0 8 0
vmmpekpl 168 8326 0 8286 4 1 3 3 0 8 0
vmmpepl 168 56496 0 54853 104 5 99 99 0 357 11
vmsppl 488 715 0 687 7 2 5 6 0 8 0
rwobjpl 80 19406 0 18452 26 0 26 26 0 8 1
pdppl 4096 1439 0 1374 125 44 81 97 0 8 16
pvpl 32 17293 0 0 140 0 140 140 0 265 0
pmappl 256 715 0 687 4 1 3 3 0 8 0
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 540 0 55 14 0 14 14 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
sysctl_sysvipc(ffff80002ab768f8,1,200000000100,ffff80002ab76928) at sysctl_sysvipc+0x539 sys/kern/kern_sysctl.c:2779
kern_sysctl(ffff80002ab768f4,2,200000000100,ffff80002ab76928,0,37,ab1061c86840ab7e) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:736
sys_sysctl(ffff800045fef770,ffff80002ab76a60,ffff80002ab769b0) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff80002ab76a60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002ab76a60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb45e7161eb0, count: -5
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff80002999dff0) 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(ffffffff83aa40c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83aa40c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173
syscall(ffff80003338ed20) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80003338ed20) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7eb36aff1450, count: 9
ddb{1}> trace
x86_ipi_db(ffff80002999dff0) 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(ffffffff83aa40c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83aa40c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173
syscall(ffff80003338ed20) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80003338ed20) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7eb36aff1450, count: -6