KASAN: invalid memory access in knote_processfork
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syzbot
Aug 14, 2026, 6:23:33 AM (4 days ago) Aug 14
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 3be50a05e816 Merge remote-tracking branch 'origin/master' ..
git tree: https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan
console output: https://syzkaller.appspot.com/x/log.txt?x=10b5a279580000
kernel config: https://syzkaller.appspot.com/x/.config?x=85e25e37d09e1b88
dashboard link: https://syzkaller.appspot.com/bug?extid=114d7893c5502e911555
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3b954151142b/disk-3be50a05.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/a46688597fde/bsd-3be50a05.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3d10bbdb8623/kernel-3be50a05.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+114d78...@syzkaller.appspotmail.com
panic: Caught invalid memory access at ffff8000017e6b72 size 2 op 0
Stopped at db_enter+0x17: popq %rbp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*184674 98743 0 0 0x4000000 0K syz-executor
244271 14129 0 0x2 0 1 syz-executor
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff8463a9fd) at panic+0x270 sys/kern/subr_prf.c:198
__asan_load2_noabort(ffff8000017e6b72) at __asan_load2_noabort+0x107
knote_processfork(ffffffff855596c0,18687) at knote_processfork+0x603 sys/kern/kern_event.c:2289
fork1(ffffffff85559360,f0,ffffffff83dc4990,0,0,ffff80003bb600c0) at fork1+0x1225 sys/kern/kern_fork.c:511
kthread_create(ffffffff83dc4990,0,ffffffff85e3fc20,ffffffff84d16b00) at kthread_create+0xa8 sys/kern/kern_kthread.c:61
sys_acct(ffff800036702a80,ffff80003bb60490,ffff80003bb60400) at sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline]
sys_acct(ffff800036702a80,ffff80003bb60490,ffff80003bb60400) at sys_acct+0x35e sys/kern/kern_acct.c:151
syscall(ffff80003bb60490) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003bb60490) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd49cbc3e370, 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: Caught invalid memory access at ffff8000017e6b72 size 2 op 0
ddb{0}> show kasan
KASAN: invalid read of 2 bytes at 0xffff8000017e6b72 from pc 0xffffffff81ec58f3
KASAN: first bad byte at 0xffff8000017e6b72 (+0); shadow 0xfd: pool use-after-free (or unallocated item)
KASAN: 0xffff8000017e6b72 is 50 bytes inside the 120-byte item [0xffff8000017e6b40..0xffff8000017e6bb8) in pool 'knotepl'
KASAN: allocated at:
#0 pool_get+0x770 sys/kern/subr_pool.c:834
#1 kqueue_register+0x2f2 sys/kern/kern_event.c:1431
#2 sys_kevent+0x409 sys/kern/kern_event.c:1301
#3 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#3 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#4 Xsyscall+0x128
KASAN: freed at:
#0 pool_put+0x79 sys/kern/subr_pool.c:1019
#1 kqueue_scan+0x1191 sys/kern/kern_event.c:1797
#2 sys_kevent+0x997 sys/kern/kern_event.c:1336
#3 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#3 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#4 Xsyscall+0x128
KASAN: pc: knote_processfork+0x603
KASAN: call trace:
#0 __asan_load2_noabort+0xe6 kasan_shadow_check sys/kern/subr_kasan.c:-1 [inline]
#0 __asan_load2_noabort+0xe6 sys/kern/subr_kasan.c:1097
#1 knote_processfork+0x603 sys/kern/kern_event.c:2289
#2 fork1+0x1225 sys/kern/kern_fork.c:511
#3 kthread_create+0xa8 sys/kern/kern_kthread.c:61
#4 sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline]
#4 sys_acct+0x35e sys/kern/kern_acct.c:151
#5 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
KASAN: shadow of 0xffff8000017e6a00..0xffff8000017e6c80 (1 cell = 8 bytes):
0xffff8000017e6a00: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08
0xffff8000017e6a80: 08 08 08 08 08 08 08 08 08 fd fd fd fd fd fd fd
>0xffff8000017e6b00: fd fd fd fd fd fd fd fd fd fd fd fd fd fd[fd]fd
0xffff8000017e6b80: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0xffff8000017e6c00: fd fd fd fd fd fd 08 08 08 08 08 08 08 08 08 08
KASAN: legend: 00 valid; 01..07 partial; fb malloc redzone; fc malloc freed; fd pool freed; fe kmem; fa global; f1..f4/f8 stack/scope
ddb{0}> trace
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff8463a9fd) at panic+0x270 sys/kern/subr_prf.c:198
__asan_load2_noabort(ffff8000017e6b72) at __asan_load2_noabort+0x107
knote_processfork(ffffffff855596c0,18687) at knote_processfork+0x603 sys/kern/kern_event.c:2289
fork1(ffffffff85559360,f0,ffffffff83dc4990,0,0,ffff80003bb600c0) at fork1+0x1225 sys/kern/kern_fork.c:511
kthread_create(ffffffff83dc4990,0,ffffffff85e3fc20,ffffffff84d16b00) at kthread_create+0xa8 sys/kern/kern_kthread.c:61
sys_acct(ffff800036702a80,ffff80003bb60490,ffff80003bb60400) at sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline]
sys_acct(ffff800036702a80,ffff80003bb60490,ffff80003bb60400) at sys_acct+0x35e sys/kern/kern_acct.c:151
syscall(ffff80003bb60490) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003bb60490) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd49cbc3e370, count: -9
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80003bb5fc70
rbx 0xffff80003bb5fce0
rdx 0
rcx 0xffffffff85311ff0 cpu_info_full_primary+0x1ff0
rax 0xffff80000016db80
r8 0x101010101010101
r9 0x8080808080808080
r10 0xffff80003bb5fa58
r11 0xffffffff8239f400 x86_bus_space_io_read_1
r12 0xffffffff8463a9fd __rodata_start+0x9d9fd
r13 0xffffffff85312c08 cpu_info_full_primary+0x2c08
r14 0xffffffff85312e07 cpu_info_full_primary+0x2e07
r15 0x1
rip 0xffffffff83b86757 db_enter+0x17
cs 0x8
rflags 0x246
rsp 0xffff80003bb5fc70
ss 0x10
db_enter+0x17: popq %rbp
ddb{0}> show proc
PROC (syz-executor) tid=184674 pid=98743 tcnt=4 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=32, usrpri=84, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800036703ca8,0xffff800036702560
process=0xffff8000367044f0 user=0xffff80003bb55000, vmspace=0xffff800001c857c0
estcpu=34, cpticks=30, pctcpu=0.3, user=0, sys=30, intr=0
ddb{0}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
99975 176894 0 0 2 0x14000 0x200 swapper
56699 170283 59976 0 2 0 0 syz-executor
72553 34717 94550 0 2 0 0 syz-executor
72553 300287 94550 0 3 0 0x4000088 kqpoll syz-executor
8311 218045 67572 0 2 0 0 syz-executor
8311 281365 67572 0 3 0 0x4000080 kqread syz-executor
76021 121677 14129 0 2 0 0 syz-executor
76021 393965 14129 0 3 0 0x4000000 smrbar syz-executor
76021 252598 14129 0 3 0 0x4000080 fsleep syz-executor
89534 371698 73279 0 2 0 0 syz-executor
89534 98339 73279 0 3 0 0x4000080 fsleep syz-executor
89451 464096 33817 0 2 0x10 0 syz-executor
89451 260744 33817 0 3 0x10 0x4000080 kqsel syz-executor
98743 28461 48345 0 2 0 0 syz-executor
98743 338286 48345 0 3 0 0x4000080 fsleep syz-executor
*98743 184674 48345 0 7 0 0x4000000 syz-executor
98743 340030 48345 0 3 0 0x4000080 fsleep syz-executor
36830 276016 96802 0 2 0 0 syz-executor
36830 451589 96802 0 3 0 0x4000080 fsleep syz-executor
36830 203230 96802 0 3 0 0x4000080 sbwait syz-executor
36830 194290 96802 0 3 0 0x4000080 fsleep syz-executor
94550 119723 26462 0 2 0x2 0xc80 syz-executor
48345 504014 26462 0 2 0x2 0xc80 syz-executor
14129 244271 26462 0 7 0x2 0 syz-executor
96802 94229 26462 0 2 0x2 0xc80 syz-executor
73279 241742 26462 0 2 0x2 0 syz-executor
59976 288211 26462 0 2 0x2 0 syz-executor
67572 341590 26462 0 2 0x2 0xc80 syz-executor
33817 149459 26462 0 2 0x2 0xc80 syz-executor
26462 255977 93183 0 3 0x2 0x80 kqread syz-executor
93183 429099 98169 0 3 0x100002 0x88 sigsusp ksh
98169 153353 37692 0 3 0x10 0x88 kqread sshd-session
37692 418896 69601 0 3 0x12 0x80 kqread sshd-session
5685 459117 1 0 3 0x100003 0x80 ttyin getty
69601 282665 1 0 3 0 0x88 kqread sshd
32087 256743 5508 74 2 0x1100012 0x80 pflogd
5508 506914 1 0 3 0 0x80 sbwait pflogd
92489 168716 41324 73 2 0x1100010 0x80 syslogd
41324 377917 1 0 3 0x100002 0x80 sbwait syslogd
36079 334940 1 0 3 0x100000 0x80 kqread resolvd
81671 513745 75818 77 3 0x100012 0x80 kqread dhcpleased
31087 345682 75818 77 3 0x100012 0x80 kqread dhcpleased
75818 56058 1 0 3 0 0x80 kqread dhcpleased
58376 91200 0 0 2 0x14000 0x200 smr
17922 151710 0 0 2 0x14000 0x200 zerothread
81442 35771 0 0 3 0x14000 0x200 aiodoned aiodoned
44268 171469 0 0 3 0x14000 0x200 syncer update
11132 286642 0 0 3 0x14000 0x200 cleaner cleaner
74897 346541 0 0 3 0x14000 0x200 reaper reaper
88909 384683 0 0 3 0x14000 0x200 pgdaemon pagedaemon
90094 71815 0 0 3 0x14000 0x200 bored viomb
51508 89765 0 0 3 0x14000 0x40000200 acpi0 acpi0
321 37221 0 0 3 0x14000 0x40000200 idle1
33240 359888 0 0 3 0x14000 0x200 bored softnet1
7168 281966 0 0 2 0x14000 0x200 softnet0
41965 232853 0 0 3 0x14000 0x200 bored systqmp
22921 53806 0 0 3 0x14000 0x200 bored systq
44518 164682 0 0 2 0x14000 0x200 softclockmp
75233 375841 0 0 2 0x14000 0x40000200 softclock
57250 326537 0 0 3 0x14000 0x40000200 idle0
1 346664 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{0}> show all locks
Process 76021 (syz-executor) thread 0xffff80003670a558 (393965)
exclusive rwlock clonelk r = 0 (0xffffffff852dc2f8)
#0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x632 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x53e sys/kern/kern_rwlock.c:320
#2 if_clone_destroy+0x9d sys/net/if.c:-1
#3 ifioctl+0x591 sys/net/if.c:2160
#4 sys_ioctl+0x868 sys/kern/sys_generic.c:510
#5 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
Process 98743 (syz-executor) thread 0xffff800036702a80 (184674)
exclusive rwlock acctlk r = 0 (0xffffffff853168f8)
#0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x632 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x53e sys/kern/kern_rwlock.c:320
#2 sys_acct+0x1be sys/kern/kern_acct.c:137
#3 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#3 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#4 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff85e4c080)
#0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x632 sys/kern/subr_witness.c:1160
#1 syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline]
#1 syscall+0x1048 sys/arch/amd64/amd64/trap.c:783
#2 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11060 12390K 12390K 166960K 12159 0
pcb 17 24K 24K 166960K 22 0
rtable 239 12K 13K 166960K 353 0
pf 36 22K 22K 166960K 47 0
ifaddr 44 12K 12K 166960K 46 0
ifgroup 59 2K 2K 166960K 59 0
sysctl 1 1K 13K 166960K 5 0
counters 72 43K 43K 166960K 72 0
ioctlops 0 0K 4K 166960K 1483 0
iov 0 0K 16K 166960K 1 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1295 83K 84K 166960K 1372 0
UFS quota 1 36K 36K 166960K 1 0
UFS mount 5 44K 44K 166960K 5 0
shm 2 2K 2K 166960K 2 0
VM map 2 1K 1K 166960K 2 0
sem 3 0K 0K 166960K 3 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1734 201K 292K 166960K 11964 0
file desc 18 65K 89K 166960K 144 0
proc 70 128K 193K 166960K 552 0
subproc 72 9K 9K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 20K 20K 166960K 1 0
in_multi 99 7K 7K 166960K 99 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 3 0
ISOFS mount 1 36K 36K 166960K 1 0
MSDOSFS mount 1 20K 20K 166960K 1 0
ttys 25 182K 182K 166960K 25 0
exec 0 0K 2K 166960K 384 0
fusefs mount 1 36K 36K 166960K 1 0
tdb 3 1K 1K 166960K 3 0
VM swap 14 124K 124K 166960K 15 0
UVM amap 237 233K 253K 166960K 3238 0
UVM aobj 3 4K 4K 166960K 3 0
pinsyscall 1067 1718K 1726K 166960K 1303 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
NDP 25 1K 2K 166960K 29 0
temp 35 9162K 9174K 166960K 3859 0
kqueue 15 45K 45K 166960K 28 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 33 0 30 1 0 1 1 0 8 0
rtentry 176 112 0 1 6 0 6 6 0 8 0
unpcb 144 43 0 24 1 0 1 1 0 8 0
syncache 336 4 0 4 2 1 1 1 0 8 1
tcpcb 736 8 0 4 1 0 1 1 0 8 0
arp 136 18 0 0 1 0 1 1 0 8 0
inpcb 328 76 0 64 1 0 1 1 0 8 0
nd6 152 25 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
pffrag 232 1 0 0 1 0 1 1 0 482 0
pffrnode 88 1 0 0 1 0 1 1 0 8 0
pffrent 40 1 0 0 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 19 0 0 1 0 1 1 0 8 0
pfstkey 128 19 0 0 1 0 1 1 0 8 0
pfstate 448 19 0 0 3 0 3 3 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 459 0 0 29 0 29 29 0 8 0
art_table 40 460 0 0 5 0 5 5 0 8 0
art_node 32 112 0 11 1 0 1 1 0 8 0
semapl 72 1 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1578 0 108 93 0 93 93 0 8 0
ffsino 296 1578 0 108 114 0 114 114 0 8 0
nchpl 144 1779 0 74 64 0 64 64 0 8 0
vnodes 216 1671 0 0 93 0 93 93 0 8 0
namei 1024 5443 0 5443 2 0 2 2 0 8 2
percpumem 16 52 0 0 1 0 1 1 0 8 0
kstatmem 264 29 0 0 2 0 2 2 0 8 0
scxspl 216 6706 0 6706 5 3 2 3 1 8 2
plimitpl 152 29 0 12 1 0 1 1 0 8 0
sigapl 424 463 0 414 7 0 7 7 0 8 0
knotepl 120 56 0 0 2 0 2 2 0 8 0
kqueuepl 224 26 0 13 1 0 1 1 0 8 0
pipepl 344 129 0 100 3 0 3 3 0 8 0
fdescpl 528 446 0 414 3 0 3 3 0 8 0
filepl 160 1599 0 1370 10 0 10 10 0 8 0
lockfpl 104 8 0 6 1 0 1 1 0 8 0
lockfspl 48 5 0 3 1 0 1 1 0 8 0
sessionpl 144 24 0 15 1 0 1 1 0 8 0
pgrppl 48 32 0 15 1 0 1 1 0 8 0
ucredpl 104 85 0 71 1 0 1 1 0 8 0
zombiepl 144 414 0 414 1 0 1 1 0 8 1
processpl 1232 463 0 414 5 0 5 5 0 8 0
procpl 664 483 0 422 6 0 6 6 0 8 0
sockpl 752 152 0 118 4 0 4 4 0 8 0
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 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 115 0 0 15 0 15 15 0 8 0
mcl2k 2048 13 0 0 2 0 2 2 0 8 0
mextrefs 64 9 0 0 1 0 1 1 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 120 0 0 8 0 8 8 0 8 0
bufpl 272 2333 0 106 149 0 149 149 0 8 0
anonpl 32 4541 0 0 37 0 37 37 0 222 0
amapchunkpl 152 8718 0 8150 24 0 24 24 0 158 0
amappl16 200 1855 0 1836 5 1 4 5 0 8 2
amappl15 192 6 0 6 2 2 0 1 0 8 0
amappl14 184 428 0 427 1 0 1 1 0 8 0
amappl13 176 121 0 109 1 0 1 1 0 8 0
amappl12 168 699 0 668 2 0 2 2 0 8 0
amappl11 160 8 0 8 2 2 0 1 0 8 0
amappl10 152 68 0 54 1 0 1 1 0 8 0
amappl9 144 275 0 275 1 1 0 1 0 8 0
amappl8 136 107 0 105 1 0 1 1 0 8 0
amappl7 128 145 0 132 1 0 1 1 0 8 0
amappl6 120 159 0 157 1 0 1 1 0 8 0
amappl5 112 99 0 89 1 0 1 1 0 8 0
amappl4 104 316 0 293 1 0 1 1 0 8 0
amappl3 96 1509 0 1408 3 0 3 3 0 8 0
amappl2 88 562 0 485 2 0 2 2 0 8 0
amappl1 80 10410 0 9796 15 0 15 15 0 8 0
amappl 88 2507 0 2342 4 0 4 4 0 92 0
uvmvnodes 80 98 0 0 2 0 2 2 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 2 0 0 1 0 1 1 0 8 0
uaddrrnd 24 446 0 414 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 446 0 414 1 0 1 1 0 8 0
vmmpekpl 168 5731 0 5698 2 0 2 2 0 8 0
vmmpepl 168 38173 0 36217 88 0 88 88 0 357 0
vmsppl 488 445 0 414 5 0 5 5 0 8 0
rwobjpl 80 14604 0 13567 25 1 24 25 0 8 1
pdppl 4096 900 0 828 98 14 84 86 0 8 12
pvpl 32 12635 0 0 104 2 102 102 0 265 0
pmappl 256 445 0 414 3 0 3 3 0 8 0
extentpl 40 47 0 29 1 0 1 1 0 8 0
phpool 120 417 0 18 13 0 13 13 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff8463a9fd) at panic+0x270 sys/kern/subr_prf.c:198
__asan_load2_noabort(ffff8000017e6b72) at __asan_load2_noabort+0x107
knote_processfork(ffffffff855596c0,18687) at knote_processfork+0x603 sys/kern/kern_event.c:2289
fork1(ffffffff85559360,f0,ffffffff83dc4990,0,0,ffff80003bb600c0) at fork1+0x1225 sys/kern/kern_fork.c:511
kthread_create(ffffffff83dc4990,0,ffffffff85e3fc20,ffffffff84d16b00) at kthread_create+0xa8 sys/kern/kern_kthread.c:61
sys_acct(ffff800036702a80,ffff80003bb60490,ffff80003bb60400) at sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline]
sys_acct(ffff800036702a80,ffff80003bb60490,ffff80003bb60400) at sys_acct+0x35e sys/kern/kern_acct.c:151
syscall(ffff80003bb60490) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003bb60490) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd49cbc3e370, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x19: leave
x86_ipi_db(ffff800028fe3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412
x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff85e4b880) at __mp_lock+0x28b __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff85e4b880) at __mp_lock+0x28b sys/kern/kern_lock.c:173
syscall(ffff800029a7c460) at syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff800029a7c460) at syscall+0x1048 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7a809954fe20, count: 9
ddb{1}> trace
x86_ipi_db(ffff800028fe3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412
x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff85e4b880) at __mp_lock+0x28b __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff85e4b880) at __mp_lock+0x28b sys/kern/kern_lock.c:173
syscall(ffff800029a7c460) at syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff800029a7c460) at syscall+0x1048 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7a809954fe20, count: -6
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 3be50a05e816 Merge remote-tracking branch 'origin/master' ..
git tree: https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan
console output: https://syzkaller.appspot.com/x/log.txt?x=10b5a279580000
kernel config: https://syzkaller.appspot.com/x/.config?x=85e25e37d09e1b88
dashboard link: https://syzkaller.appspot.com/bug?extid=114d7893c5502e911555
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3b954151142b/disk-3be50a05.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/a46688597fde/bsd-3be50a05.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3d10bbdb8623/kernel-3be50a05.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+114d78...@syzkaller.appspotmail.com
panic: Caught invalid memory access at ffff8000017e6b72 size 2 op 0
Stopped at db_enter+0x17: popq %rbp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*184674 98743 0 0 0x4000000 0K syz-executor
244271 14129 0 0x2 0 1 syz-executor
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff8463a9fd) at panic+0x270 sys/kern/subr_prf.c:198
__asan_load2_noabort(ffff8000017e6b72) at __asan_load2_noabort+0x107
knote_processfork(ffffffff855596c0,18687) at knote_processfork+0x603 sys/kern/kern_event.c:2289
fork1(ffffffff85559360,f0,ffffffff83dc4990,0,0,ffff80003bb600c0) at fork1+0x1225 sys/kern/kern_fork.c:511
kthread_create(ffffffff83dc4990,0,ffffffff85e3fc20,ffffffff84d16b00) at kthread_create+0xa8 sys/kern/kern_kthread.c:61
sys_acct(ffff800036702a80,ffff80003bb60490,ffff80003bb60400) at sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline]
sys_acct(ffff800036702a80,ffff80003bb60490,ffff80003bb60400) at sys_acct+0x35e sys/kern/kern_acct.c:151
syscall(ffff80003bb60490) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003bb60490) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd49cbc3e370, 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: Caught invalid memory access at ffff8000017e6b72 size 2 op 0
ddb{0}> show kasan
KASAN: invalid read of 2 bytes at 0xffff8000017e6b72 from pc 0xffffffff81ec58f3
KASAN: first bad byte at 0xffff8000017e6b72 (+0); shadow 0xfd: pool use-after-free (or unallocated item)
KASAN: 0xffff8000017e6b72 is 50 bytes inside the 120-byte item [0xffff8000017e6b40..0xffff8000017e6bb8) in pool 'knotepl'
KASAN: allocated at:
#0 pool_get+0x770 sys/kern/subr_pool.c:834
#1 kqueue_register+0x2f2 sys/kern/kern_event.c:1431
#2 sys_kevent+0x409 sys/kern/kern_event.c:1301
#3 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#3 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#4 Xsyscall+0x128
KASAN: freed at:
#0 pool_put+0x79 sys/kern/subr_pool.c:1019
#1 kqueue_scan+0x1191 sys/kern/kern_event.c:1797
#2 sys_kevent+0x997 sys/kern/kern_event.c:1336
#3 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#3 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#4 Xsyscall+0x128
KASAN: pc: knote_processfork+0x603
KASAN: call trace:
#0 __asan_load2_noabort+0xe6 kasan_shadow_check sys/kern/subr_kasan.c:-1 [inline]
#0 __asan_load2_noabort+0xe6 sys/kern/subr_kasan.c:1097
#1 knote_processfork+0x603 sys/kern/kern_event.c:2289
#2 fork1+0x1225 sys/kern/kern_fork.c:511
#3 kthread_create+0xa8 sys/kern/kern_kthread.c:61
#4 sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline]
#4 sys_acct+0x35e sys/kern/kern_acct.c:151
#5 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
KASAN: shadow of 0xffff8000017e6a00..0xffff8000017e6c80 (1 cell = 8 bytes):
0xffff8000017e6a00: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08
0xffff8000017e6a80: 08 08 08 08 08 08 08 08 08 fd fd fd fd fd fd fd
>0xffff8000017e6b00: fd fd fd fd fd fd fd fd fd fd fd fd fd fd[fd]fd
0xffff8000017e6b80: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0xffff8000017e6c00: fd fd fd fd fd fd 08 08 08 08 08 08 08 08 08 08
KASAN: legend: 00 valid; 01..07 partial; fb malloc redzone; fc malloc freed; fd pool freed; fe kmem; fa global; f1..f4/f8 stack/scope
ddb{0}> trace
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff8463a9fd) at panic+0x270 sys/kern/subr_prf.c:198
__asan_load2_noabort(ffff8000017e6b72) at __asan_load2_noabort+0x107
knote_processfork(ffffffff855596c0,18687) at knote_processfork+0x603 sys/kern/kern_event.c:2289
fork1(ffffffff85559360,f0,ffffffff83dc4990,0,0,ffff80003bb600c0) at fork1+0x1225 sys/kern/kern_fork.c:511
kthread_create(ffffffff83dc4990,0,ffffffff85e3fc20,ffffffff84d16b00) at kthread_create+0xa8 sys/kern/kern_kthread.c:61
sys_acct(ffff800036702a80,ffff80003bb60490,ffff80003bb60400) at sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline]
sys_acct(ffff800036702a80,ffff80003bb60490,ffff80003bb60400) at sys_acct+0x35e sys/kern/kern_acct.c:151
syscall(ffff80003bb60490) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003bb60490) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd49cbc3e370, count: -9
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80003bb5fc70
rbx 0xffff80003bb5fce0
rdx 0
rcx 0xffffffff85311ff0 cpu_info_full_primary+0x1ff0
rax 0xffff80000016db80
r8 0x101010101010101
r9 0x8080808080808080
r10 0xffff80003bb5fa58
r11 0xffffffff8239f400 x86_bus_space_io_read_1
r12 0xffffffff8463a9fd __rodata_start+0x9d9fd
r13 0xffffffff85312c08 cpu_info_full_primary+0x2c08
r14 0xffffffff85312e07 cpu_info_full_primary+0x2e07
r15 0x1
rip 0xffffffff83b86757 db_enter+0x17
cs 0x8
rflags 0x246
rsp 0xffff80003bb5fc70
ss 0x10
db_enter+0x17: popq %rbp
ddb{0}> show proc
PROC (syz-executor) tid=184674 pid=98743 tcnt=4 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=32, usrpri=84, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800036703ca8,0xffff800036702560
process=0xffff8000367044f0 user=0xffff80003bb55000, vmspace=0xffff800001c857c0
estcpu=34, cpticks=30, pctcpu=0.3, user=0, sys=30, intr=0
ddb{0}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
99975 176894 0 0 2 0x14000 0x200 swapper
56699 170283 59976 0 2 0 0 syz-executor
72553 34717 94550 0 2 0 0 syz-executor
72553 300287 94550 0 3 0 0x4000088 kqpoll syz-executor
8311 218045 67572 0 2 0 0 syz-executor
8311 281365 67572 0 3 0 0x4000080 kqread syz-executor
76021 121677 14129 0 2 0 0 syz-executor
76021 393965 14129 0 3 0 0x4000000 smrbar syz-executor
76021 252598 14129 0 3 0 0x4000080 fsleep syz-executor
89534 371698 73279 0 2 0 0 syz-executor
89534 98339 73279 0 3 0 0x4000080 fsleep syz-executor
89451 464096 33817 0 2 0x10 0 syz-executor
89451 260744 33817 0 3 0x10 0x4000080 kqsel syz-executor
98743 28461 48345 0 2 0 0 syz-executor
98743 338286 48345 0 3 0 0x4000080 fsleep syz-executor
*98743 184674 48345 0 7 0 0x4000000 syz-executor
98743 340030 48345 0 3 0 0x4000080 fsleep syz-executor
36830 276016 96802 0 2 0 0 syz-executor
36830 451589 96802 0 3 0 0x4000080 fsleep syz-executor
36830 203230 96802 0 3 0 0x4000080 sbwait syz-executor
36830 194290 96802 0 3 0 0x4000080 fsleep syz-executor
94550 119723 26462 0 2 0x2 0xc80 syz-executor
48345 504014 26462 0 2 0x2 0xc80 syz-executor
14129 244271 26462 0 7 0x2 0 syz-executor
96802 94229 26462 0 2 0x2 0xc80 syz-executor
73279 241742 26462 0 2 0x2 0 syz-executor
59976 288211 26462 0 2 0x2 0 syz-executor
67572 341590 26462 0 2 0x2 0xc80 syz-executor
33817 149459 26462 0 2 0x2 0xc80 syz-executor
26462 255977 93183 0 3 0x2 0x80 kqread syz-executor
93183 429099 98169 0 3 0x100002 0x88 sigsusp ksh
98169 153353 37692 0 3 0x10 0x88 kqread sshd-session
37692 418896 69601 0 3 0x12 0x80 kqread sshd-session
5685 459117 1 0 3 0x100003 0x80 ttyin getty
69601 282665 1 0 3 0 0x88 kqread sshd
32087 256743 5508 74 2 0x1100012 0x80 pflogd
5508 506914 1 0 3 0 0x80 sbwait pflogd
92489 168716 41324 73 2 0x1100010 0x80 syslogd
41324 377917 1 0 3 0x100002 0x80 sbwait syslogd
36079 334940 1 0 3 0x100000 0x80 kqread resolvd
81671 513745 75818 77 3 0x100012 0x80 kqread dhcpleased
31087 345682 75818 77 3 0x100012 0x80 kqread dhcpleased
75818 56058 1 0 3 0 0x80 kqread dhcpleased
58376 91200 0 0 2 0x14000 0x200 smr
17922 151710 0 0 2 0x14000 0x200 zerothread
81442 35771 0 0 3 0x14000 0x200 aiodoned aiodoned
44268 171469 0 0 3 0x14000 0x200 syncer update
11132 286642 0 0 3 0x14000 0x200 cleaner cleaner
74897 346541 0 0 3 0x14000 0x200 reaper reaper
88909 384683 0 0 3 0x14000 0x200 pgdaemon pagedaemon
90094 71815 0 0 3 0x14000 0x200 bored viomb
51508 89765 0 0 3 0x14000 0x40000200 acpi0 acpi0
321 37221 0 0 3 0x14000 0x40000200 idle1
33240 359888 0 0 3 0x14000 0x200 bored softnet1
7168 281966 0 0 2 0x14000 0x200 softnet0
41965 232853 0 0 3 0x14000 0x200 bored systqmp
22921 53806 0 0 3 0x14000 0x200 bored systq
44518 164682 0 0 2 0x14000 0x200 softclockmp
75233 375841 0 0 2 0x14000 0x40000200 softclock
57250 326537 0 0 3 0x14000 0x40000200 idle0
1 346664 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{0}> show all locks
Process 76021 (syz-executor) thread 0xffff80003670a558 (393965)
exclusive rwlock clonelk r = 0 (0xffffffff852dc2f8)
#0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x632 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x53e sys/kern/kern_rwlock.c:320
#2 if_clone_destroy+0x9d sys/net/if.c:-1
#3 ifioctl+0x591 sys/net/if.c:2160
#4 sys_ioctl+0x868 sys/kern/sys_generic.c:510
#5 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
Process 98743 (syz-executor) thread 0xffff800036702a80 (184674)
exclusive rwlock acctlk r = 0 (0xffffffff853168f8)
#0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x632 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x53e sys/kern/kern_rwlock.c:320
#2 sys_acct+0x1be sys/kern/kern_acct.c:137
#3 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#3 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#4 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff85e4c080)
#0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x632 sys/kern/subr_witness.c:1160
#1 syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline]
#1 syscall+0x1048 sys/arch/amd64/amd64/trap.c:783
#2 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11060 12390K 12390K 166960K 12159 0
pcb 17 24K 24K 166960K 22 0
rtable 239 12K 13K 166960K 353 0
pf 36 22K 22K 166960K 47 0
ifaddr 44 12K 12K 166960K 46 0
ifgroup 59 2K 2K 166960K 59 0
sysctl 1 1K 13K 166960K 5 0
counters 72 43K 43K 166960K 72 0
ioctlops 0 0K 4K 166960K 1483 0
iov 0 0K 16K 166960K 1 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1295 83K 84K 166960K 1372 0
UFS quota 1 36K 36K 166960K 1 0
UFS mount 5 44K 44K 166960K 5 0
shm 2 2K 2K 166960K 2 0
VM map 2 1K 1K 166960K 2 0
sem 3 0K 0K 166960K 3 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1734 201K 292K 166960K 11964 0
file desc 18 65K 89K 166960K 144 0
proc 70 128K 193K 166960K 552 0
subproc 72 9K 9K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 20K 20K 166960K 1 0
in_multi 99 7K 7K 166960K 99 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 3 0
ISOFS mount 1 36K 36K 166960K 1 0
MSDOSFS mount 1 20K 20K 166960K 1 0
ttys 25 182K 182K 166960K 25 0
exec 0 0K 2K 166960K 384 0
fusefs mount 1 36K 36K 166960K 1 0
tdb 3 1K 1K 166960K 3 0
VM swap 14 124K 124K 166960K 15 0
UVM amap 237 233K 253K 166960K 3238 0
UVM aobj 3 4K 4K 166960K 3 0
pinsyscall 1067 1718K 1726K 166960K 1303 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
NDP 25 1K 2K 166960K 29 0
temp 35 9162K 9174K 166960K 3859 0
kqueue 15 45K 45K 166960K 28 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 33 0 30 1 0 1 1 0 8 0
rtentry 176 112 0 1 6 0 6 6 0 8 0
unpcb 144 43 0 24 1 0 1 1 0 8 0
syncache 336 4 0 4 2 1 1 1 0 8 1
tcpcb 736 8 0 4 1 0 1 1 0 8 0
arp 136 18 0 0 1 0 1 1 0 8 0
inpcb 328 76 0 64 1 0 1 1 0 8 0
nd6 152 25 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
pffrag 232 1 0 0 1 0 1 1 0 482 0
pffrnode 88 1 0 0 1 0 1 1 0 8 0
pffrent 40 1 0 0 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 19 0 0 1 0 1 1 0 8 0
pfstkey 128 19 0 0 1 0 1 1 0 8 0
pfstate 448 19 0 0 3 0 3 3 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 459 0 0 29 0 29 29 0 8 0
art_table 40 460 0 0 5 0 5 5 0 8 0
art_node 32 112 0 11 1 0 1 1 0 8 0
semapl 72 1 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1578 0 108 93 0 93 93 0 8 0
ffsino 296 1578 0 108 114 0 114 114 0 8 0
nchpl 144 1779 0 74 64 0 64 64 0 8 0
vnodes 216 1671 0 0 93 0 93 93 0 8 0
namei 1024 5443 0 5443 2 0 2 2 0 8 2
percpumem 16 52 0 0 1 0 1 1 0 8 0
kstatmem 264 29 0 0 2 0 2 2 0 8 0
scxspl 216 6706 0 6706 5 3 2 3 1 8 2
plimitpl 152 29 0 12 1 0 1 1 0 8 0
sigapl 424 463 0 414 7 0 7 7 0 8 0
knotepl 120 56 0 0 2 0 2 2 0 8 0
kqueuepl 224 26 0 13 1 0 1 1 0 8 0
pipepl 344 129 0 100 3 0 3 3 0 8 0
fdescpl 528 446 0 414 3 0 3 3 0 8 0
filepl 160 1599 0 1370 10 0 10 10 0 8 0
lockfpl 104 8 0 6 1 0 1 1 0 8 0
lockfspl 48 5 0 3 1 0 1 1 0 8 0
sessionpl 144 24 0 15 1 0 1 1 0 8 0
pgrppl 48 32 0 15 1 0 1 1 0 8 0
ucredpl 104 85 0 71 1 0 1 1 0 8 0
zombiepl 144 414 0 414 1 0 1 1 0 8 1
processpl 1232 463 0 414 5 0 5 5 0 8 0
procpl 664 483 0 422 6 0 6 6 0 8 0
sockpl 752 152 0 118 4 0 4 4 0 8 0
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 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 115 0 0 15 0 15 15 0 8 0
mcl2k 2048 13 0 0 2 0 2 2 0 8 0
mextrefs 64 9 0 0 1 0 1 1 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 120 0 0 8 0 8 8 0 8 0
bufpl 272 2333 0 106 149 0 149 149 0 8 0
anonpl 32 4541 0 0 37 0 37 37 0 222 0
amapchunkpl 152 8718 0 8150 24 0 24 24 0 158 0
amappl16 200 1855 0 1836 5 1 4 5 0 8 2
amappl15 192 6 0 6 2 2 0 1 0 8 0
amappl14 184 428 0 427 1 0 1 1 0 8 0
amappl13 176 121 0 109 1 0 1 1 0 8 0
amappl12 168 699 0 668 2 0 2 2 0 8 0
amappl11 160 8 0 8 2 2 0 1 0 8 0
amappl10 152 68 0 54 1 0 1 1 0 8 0
amappl9 144 275 0 275 1 1 0 1 0 8 0
amappl8 136 107 0 105 1 0 1 1 0 8 0
amappl7 128 145 0 132 1 0 1 1 0 8 0
amappl6 120 159 0 157 1 0 1 1 0 8 0
amappl5 112 99 0 89 1 0 1 1 0 8 0
amappl4 104 316 0 293 1 0 1 1 0 8 0
amappl3 96 1509 0 1408 3 0 3 3 0 8 0
amappl2 88 562 0 485 2 0 2 2 0 8 0
amappl1 80 10410 0 9796 15 0 15 15 0 8 0
amappl 88 2507 0 2342 4 0 4 4 0 92 0
uvmvnodes 80 98 0 0 2 0 2 2 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 2 0 0 1 0 1 1 0 8 0
uaddrrnd 24 446 0 414 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 446 0 414 1 0 1 1 0 8 0
vmmpekpl 168 5731 0 5698 2 0 2 2 0 8 0
vmmpepl 168 38173 0 36217 88 0 88 88 0 357 0
vmsppl 488 445 0 414 5 0 5 5 0 8 0
rwobjpl 80 14604 0 13567 25 1 24 25 0 8 1
pdppl 4096 900 0 828 98 14 84 86 0 8 12
pvpl 32 12635 0 0 104 2 102 102 0 265 0
pmappl 256 445 0 414 3 0 3 3 0 8 0
extentpl 40 47 0 29 1 0 1 1 0 8 0
phpool 120 417 0 18 13 0 13 13 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff8463a9fd) at panic+0x270 sys/kern/subr_prf.c:198
__asan_load2_noabort(ffff8000017e6b72) at __asan_load2_noabort+0x107
knote_processfork(ffffffff855596c0,18687) at knote_processfork+0x603 sys/kern/kern_event.c:2289
fork1(ffffffff85559360,f0,ffffffff83dc4990,0,0,ffff80003bb600c0) at fork1+0x1225 sys/kern/kern_fork.c:511
kthread_create(ffffffff83dc4990,0,ffffffff85e3fc20,ffffffff84d16b00) at kthread_create+0xa8 sys/kern/kern_kthread.c:61
sys_acct(ffff800036702a80,ffff80003bb60490,ffff80003bb60400) at sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline]
sys_acct(ffff800036702a80,ffff80003bb60490,ffff80003bb60400) at sys_acct+0x35e sys/kern/kern_acct.c:151
syscall(ffff80003bb60490) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003bb60490) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd49cbc3e370, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x19: leave
x86_ipi_db(ffff800028fe3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412
x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff85e4b880) at __mp_lock+0x28b __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff85e4b880) at __mp_lock+0x28b sys/kern/kern_lock.c:173
syscall(ffff800029a7c460) at syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff800029a7c460) at syscall+0x1048 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7a809954fe20, count: 9
ddb{1}> trace
x86_ipi_db(ffff800028fe3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412
x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff85e4b880) at __mp_lock+0x28b __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff85e4b880) at __mp_lock+0x28b sys/kern/kern_lock.c:173
syscall(ffff800029a7c460) at syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff800029a7c460) at syscall+0x1048 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7a809954fe20, count: -6
---
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