witness: lock_object uninitialized: ADDR (6)
0 views
Skip to first unread message
syzbot
Jul 24, 2026, 4:54:33 AM (4 days ago) Jul 24
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 7c61c2d2eaf2 Fix checkalias contract to register the vnode..
git tree: https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan
console output: https://syzkaller.appspot.com/x/log.txt?x=1282e351580000
kernel config: https://syzkaller.appspot.com/x/.config?x=85e25e37d09e1b88
dashboard link: https://syzkaller.appspot.com/bug?extid=7f96d1ae30eae229ea32
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0f6409b719e5/disk-7c61c2d2.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/645cca046c7d/bsd-7c61c2d2.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/daa40b48d8c6/kernel-7c61c2d2.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7f96d1...@syzkaller.appspotmail.com
witness: lock_object uninitialized: 0xffffffff851c4690
Starting stack trace...
witness_debugger(1) at witness_debugger+0xb2 sys/kern/subr_witness.c:2572
witness_checkorder(ffffffff851c4690,9,0) at witness_checkorder+0x19c sys/kern/subr_witness.c:783
mtx_enter(ffffffff851c4680) at mtx_enter+0x105 sys/kern/kern_lock.c:406
kqueue_register(ffffffff851c4680,ffff8000297fe660,0,0) at kqueue_register+0x3ab sys/kern/kern_event.c:1445
knote_processfork(ffff8000298039c0,17458) at knote_processfork+0x5b1 sys/kern/kern_event.c:2286
fork1(ffff800045fffc88,1,ffffffff83a58850,0,ffff8000297fe8e0,0) at fork1+0x1225 sys/kern/kern_fork.c:511
syscall(ffff8000297fe980) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000297fe980) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x701707937530, count: 249
End of stack trace.
Stopped at db_enter+0x17: popq %rbp
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> show kasan
kasan: no report recorded this boot
ddb{0}> trace
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
witness_checkorder(ffffffff851c4690,9,0) at witness_checkorder+0x19c sys/kern/subr_witness.c:783
mtx_enter(ffffffff851c4680) at mtx_enter+0x105 sys/kern/kern_lock.c:406
kqueue_register(ffffffff851c4680,ffff8000297fe660,0,0) at kqueue_register+0x3ab sys/kern/kern_event.c:1445
knote_processfork(ffff8000298039c0,17458) at knote_processfork+0x5b1 sys/kern/kern_event.c:2286
fork1(ffff800045fffc88,1,ffffffff83a58850,0,ffff8000297fe8e0,0) at fork1+0x1225 sys/kern/kern_fork.c:511
syscall(ffff8000297fe980) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000297fe980) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x701707937530, count: -8
ddb{0}> show registers
rdi 0x3
rsi 0x3
rbp 0xffff8000297fe1f0
rbx 0
rdx 0
rcx 0xffffffff851c3ff0 cpu_info_full_primary+0x1ff0
rax 0
r8 0xffff8000297fe120
r9 0xffff8000297fdf60
r10 0xffff8000297fdef8
r11 0xffffffff831c6730 x86_bus_space_io_read_1
r12 0xffffffff851c4690 cpu_info_full_primary+0x2690
r13 0x4
r14 0
r15 0xffffffff851c46b0 cpu_info_full_primary+0x26b0
rip 0xffffffff82e89947 db_enter+0x17
cs 0x8
rflags 0x246
rsp 0xffff8000297fe1f0
ss 0x10
db_enter+0x17: popq %rbp
ddb{0}> show proc
PROC (init) tid=5300 pid=1 tcnt=1 stat=onproc
flags process=2<EXEC> proc=0
runpri=17, usrpri=54, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffffffff854d7ca0,0xffff800045fff768
process=0xffff8000298039c0 user=0xffff8000297f3000, vmspace=0xffff800000d8a1e8
estcpu=4, cpticks=21, pctcpu=0.0, user=0, sys=20, intr=0
ddb{0}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
95320 320920 1 0 2 0 0 init
69175 91808 30780 0 2 0x10 0xc80 syz-executor
69175 286897 30780 0 3 0x10 0x4000080 fifow syz-executor
69175 247674 30780 0 3 0x10 0x4000080 fsleep syz-executor
62220 441636 72782 0 3 0x1000 0x2000 suspend syz-executor
62220 28883 72782 0 7 0x1000 0x4080000 syz-executor
62220 243249 72782 0 2 0x1000 0x4080000 syz-executor
62220 99969 72782 0 2 0x1000 0x4080000 syz-executor
24050 452237 27522 0 2 0x10000002 0 syz-executor
86950 197226 27522 0 2 0x2 0xc80 syz-executor
79024 308667 27522 0 2 0x2 0 syz-executor
7333 60515 27522 0 2 0x2 0 syz-executor
30780 56229 27522 0 2 0x2 0xc80 syz-executor
71535 151774 27522 0 2 0x10000002 0xc80 syz-executor
72782 191389 27522 0 3 0x2 0x80 wait syz-executor
8141 113354 27522 0 2 0x10000002 0xc80 syz-executor
27522 3287 14280 0 3 0x2 0x80 kqread syz-executor
14280 138279 1 0 3 0x100002 0x80 nanoslp ksh
25463 251608 1 0 3 0x2 0x88 kqread sshd
94240 210716 9685 74 3 0x1100012 0x80 bpf pflogd
9685 510522 1 0 3 0 0x80 sbwait pflogd
57621 85716 67363 73 2 0x1100010 0x80 syslogd
67363 65053 1 0 3 0x100002 0x80 sbwait syslogd
63480 352423 1 0 3 0x100000 0x80 kqread resolvd
79619 477095 68284 77 3 0x100012 0x80 kqread dhcpleased
20403 288742 68284 77 3 0x100012 0x80 kqread dhcpleased
68284 260376 1 0 3 0 0x80 kqread dhcpleased
29832 63552 0 0 2 0x14000 0x40000200 smr
39538 282891 0 0 2 0x14000 0x200 zerothread
15208 76253 0 0 3 0x14000 0x200 aiodoned aiodoned
87091 112908 0 0 3 0x14000 0x200 syncer update
76436 341895 0 0 3 0x14000 0x200 cleaner cleaner
87629 428826 0 0 3 0x14000 0x200 reaper reaper
5569 243139 0 0 3 0x14000 0x200 pgdaemon pagedaemon
1600 429019 0 0 3 0x14000 0x200 bored viomb
28866 168435 0 0 3 0x14000 0x40000200 acpi0 acpi0
84115 262756 0 0 3 0x14000 0x40000200 idle1
28104 223824 0 0 3 0x14000 0x200 bored softnet1
69351 374817 0 0 2 0x14000 0x200 softnet0
48813 278769 0 0 2 0x14000 0x200 systqmp
16103 315988 0 0 3 0x14000 0x200 bored systq
93484 324882 0 0 2 0x14000 0x200 softclockmp
8392 451041 0 0 3 0x14000 0x40000200 tmoslp softclock
1347 245407 0 0 3 0x14000 0x40000200 idle0
* 1 5300 0 0 7 0x2 0 init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{0}> show all locks
Process 62220 (syz-executor) thread 0xffff800045ffc2b0 (28883)
shared rwlock vmmaplk r = 0 (0xffff800001c49118)
#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_read+0x55d sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x1a2 sys/uvm/uvm_fault.c:-1
#3 uvm_fault_check+0x43 sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x1e7 sys/uvm/uvm_fault.c:627
#5 kpageflttrap+0x41e sys/arch/amd64/amd64/trap.c:283
#6 kerntrap+0x1b6 sys/arch/amd64/amd64/trap.c:528
#7 alltraps_kern_meltdown+0x7b
#8 copyout+0x59
#9 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#10 Xsyscall+0x128
Process 79024 (syz-executor) thread 0xffff800045ffda08 (308667)
exclusive rrwlock inode r = 0 (0xffff8000019d4c30)
#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 rrw_enter+0xf0 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0x17e sys/kern/vfs_vops.c:527
#4 vn_lock+0xca sys/kern/vfs_vnops.c:576
#5 vget+0x321 sys/kern/vfs_subr.c:698
#6 ufs_ihashget+0x233 sys/ufs/ufs/ufs_ihash.c:98
#7 ffs_vget+0x10b sys/ufs/ffs/ffs_vfsops.c:1203
#8 ufs_lookup+0x1529 sys/ufs/ufs/ufs_lookup.c:478
#9 VOP_LOOKUP+0xda sys/kern/vfs_vops.c:85
#10 vfs_lookup+0xfbd sys/kern/vfs_lookup.c:580
#11 namei+0xe19 sys/kern/vfs_lookup.c:250
#12 dounlinkat+0x102 sys/kern/vfs_syscalls.c:1807
#13 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xffff800001c02588)
#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 rrw_enter+0xf0 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0x17e sys/kern/vfs_vops.c:527
#4 vn_lock+0xca sys/kern/vfs_vnops.c:576
#5 vfs_lookup+0x1f7 sys/kern/vfs_lookup.c:431
#6 namei+0xe19 sys/kern/vfs_lookup.c:250
#7 dounlinkat+0x102 sys/kern/vfs_syscalls.c:1807
#8 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#9 Xsyscall+0x128
Process 7333 (syz-executor) thread 0xffff800045ffdca0 (60515)
exclusive rrwlock inode r = 0 (0xffff800001c4f7e0)
#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 rrw_enter+0xf0 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0x17e sys/kern/vfs_vops.c:527
#4 vn_lock+0xca sys/kern/vfs_vnops.c:576
#5 vn_closefile+0x1b2 vn_close sys/kern/vfs_vnops.c:298 [inline]
#5 vn_closefile+0x1b2 sys/kern/vfs_vnops.c:621
#6 fdrop+0x1c3 sys/kern/kern_descrip.c:1281
#7 closef+0x263 sys/kern/kern_descrip.c:1265
#8 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#9 Xsyscall+0x128
Process 1 (init) thread 0xffff800045fffc88 (5300)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff85435b40)
#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 11062 12247K 12635K 166960K 12309 0
pcb 17 28K 30K 166960K 40 0
rtable 237 12K 13K 166960K 357 0
pf 34 22K 22K 166960K 45 0
ifaddr 43 12K 12K 166960K 45 0
ifgroup 55 2K 2K 166960K 55 0
sysctl 1 1K 13K 166960K 6 0
counters 70 42K 42K 166960K 70 0
ioctlops 0 0K 4K 166960K 1556 0
iov 0 0K 4K 166960K 4 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1307 84K 84K 166960K 1425 0
UFS quota 1 36K 36K 166960K 1 0
UFS mount 5 44K 44K 166960K 5 0
shm 2 2K 6K 166960K 5 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 13 45K 93K 166960K 199 0
sigio 0 0K 0K 166960K 2 0
proc 62 112K 177K 166960K 560 0
subproc 72 9K 9K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 20K 20K 166960K 1 0
ip_moptions 0 0K 0K 166960K 2 0
in_multi 99 7K 7K 166960K 99 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 10 0
ISOFS mount 1 36K 36K 166960K 1 0
MSDOSFS mount 1 20K 20K 166960K 1 0
ttys 49 344K 344K 166960K 49 0
exec 0 0K 2K 166960K 383 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 186 222K 252K 166960K 3653 0
UVM aobj 6 4K 4K 166960K 6 0
pinsyscall 1057 1729K 1738K 166960K 1359 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
NDP 12 0K 2K 166960K 28 0
temp 35 9166K 9178K 166960K 4116 0
kqueue 14 38K 62K 166960K 44 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 34 0 31 1 0 1 1 0 8 0
rtentry 176 114 0 4 6 0 6 6 0 8 0
unpcb 144 109 0 93 2 0 2 2 0 8 1
syncache 336 4 0 4 2 1 1 1 0 8 1
tcpcb 736 19 0 16 1 0 1 1 0 8 0
arp 136 19 0 1 1 0 1 1 0 8 0
inpcb 328 173 0 166 7 0 7 7 0 8 6
nd6 152 24 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 1429 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1429 0 714 21 0 21 21 0 8 0
pfstitem 24 23 0 0 1 0 1 1 0 8 0
pfstkey 128 23 0 0 1 0 1 1 0 8 0
pfstate 448 23 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 256 456 0 2 29 0 29 29 0 8 0
art_table 40 457 0 2 5 0 5 5 0 8 0
art_node 32 114 0 14 1 0 1 1 0 8 0
semapl 72 1 0 0 1 0 1 1 0 8 0
shmpl 112 3 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1693 0 222 93 0 93 93 0 8 0
ffsino 296 1693 0 222 114 0 114 114 0 8 0
nchpl 144 1995 0 283 64 0 64 64 0 8 0
vnodes 216 1818 0 0 101 0 101 101 0 8 0
namei 1024 6432 0 6432 1 0 1 1 0 8 1
percpumem 16 51 0 0 1 0 1 1 0 8 0
kstatmem 264 27 0 0 2 0 2 2 0 8 0
scxspl 216 7169 0 7169 2 1 1 2 1 8 1
plimitpl 152 34 0 19 1 0 1 1 0 8 0
sigapl 424 517 0 473 7 0 7 7 0 8 1
knotepl 120 144 0 0 5 0 5 5 0 8 0
kqueuepl 224 49 0 39 2 0 2 2 0 8 1
pipepl 344 136 0 109 3 0 3 3 0 8 0
fdescpl 528 501 0 476 3 0 3 3 0 8 0
filepl 160 2073 0 1863 13 0 13 13 0 8 2
lockfpl 104 43 0 41 1 0 1 1 0 8 0
lockfspl 48 21 0 19 1 0 1 1 0 8 0
sessionpl 144 36 0 29 1 0 1 1 0 8 0
pgrppl 48 45 0 30 1 0 1 1 0 8 0
ucredpl 104 160 0 147 1 0 1 1 0 8 0
zombiepl 144 478 0 473 1 0 1 1 0 8 0
processpl 1232 517 0 473 5 0 5 5 0 8 0
procpl 664 629 0 580 6 0 6 6 0 8 1
sosppl 176 1 0 1 1 0 1 1 0 8 1
sockpl 752 317 0 291 11 0 11 11 0 8 7
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 115 0 0 15 0 15 15 0 8 0
mcl2k 2048 19 0 0 3 0 3 3 0 8 0
mextrefs 64 19 0 0 1 0 1 1 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 137 0 0 9 0 9 9 0 8 0
bufpl 272 2467 0 107 158 0 158 158 0 8 0
anonpl 32 8374 0 0 68 0 68 68 0 222 0
amapchunkpl 152 10514 0 10154 21 0 21 21 0 158 3
amappl16 200 2197 0 1934 16 1 15 15 0 8 1
amappl15 192 8 0 7 1 0 1 1 0 8 0
amappl14 184 431 0 430 1 0 1 1 0 8 0
amappl13 176 125 0 114 1 0 1 1 0 8 0
amappl12 168 768 0 745 2 0 2 2 0 8 0
amappl11 160 8 0 8 1 0 1 1 0 8 1
amappl10 152 100 0 86 1 0 1 1 0 8 0
amappl9 144 278 0 278 1 1 0 1 0 8 0
amappl8 136 99 0 97 1 0 1 1 0 8 0
amappl7 128 162 0 151 1 0 1 1 0 8 0
amappl6 120 154 0 153 1 0 1 1 0 8 0
amappl5 112 96 0 87 1 0 1 1 0 8 0
amappl4 104 314 0 294 1 0 1 1 0 8 0
amappl3 96 1851 0 1770 4 0 4 4 0 8 1
amappl2 88 553 0 505 2 0 2 2 0 8 0
amappl1 80 11065 0 10663 14 0 14 14 0 8 2
amappl 88 2911 0 2788 4 0 4 4 0 92 0
uvmvnodes 80 100 0 0 3 0 3 3 0 8 0
dma4096 4096 2 0 2 2 1 1 1 0 8 1
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 5 0 0 1 0 1 1 0 8 0
uaddrrnd 24 501 0 476 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 501 0 476 1 0 1 1 0 8 0
vmmpekpl 168 6310 0 6276 2 0 2 2 0 8 0
vmmpepl 168 42163 0 40551 92 0 92 92 0 357 5
vmsppl 488 500 0 476 5 0 5 5 0 8 1
rwobjpl 80 15922 0 14844 26 0 26 26 0 8 0
pdppl 4096 1011 0 952 97 26 71 87 0 8 12
pvpl 32 15332 0 0 124 0 124 124 0 265 0
pmappl 256 500 0 476 3 0 3 3 0 8 0
extentpl 40 47 0 29 1 0 1 1 0 8 0
phpool 120 425 0 30 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
witness_checkorder(ffffffff851c4690,9,0) at witness_checkorder+0x19c sys/kern/subr_witness.c:783
mtx_enter(ffffffff851c4680) at mtx_enter+0x105 sys/kern/kern_lock.c:406
kqueue_register(ffffffff851c4680,ffff8000297fe660,0,0) at kqueue_register+0x3ab sys/kern/kern_event.c:1445
knote_processfork(ffff8000298039c0,17458) at knote_processfork+0x5b1 sys/kern/kern_event.c:2286
fork1(ffff800045fffc88,1,ffffffff83a58850,0,ffff8000297fe8e0,0) at fork1+0x1225 sys/kern/kern_fork.c:511
syscall(ffff8000297fe980) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000297fe980) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x701707937530, count: -8
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x19: leave
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
__asan_load4_noabort(10) at __asan_load4_noabort+0x8 sys/kern/subr_kasan.c:1098
vm_map_unlock_read_ln(ffff800001c49018,ffffffff84db9f00,719) at vm_map_unlock_read_ln+0x2a sys/uvm/uvm_map.c:5224
uvmfault_lookup(ffff80003bb77860,0) at uvmfault_lookup+0x397 sys/uvm/uvm_fault.c:1882
uvm_fault_check(ffff80003bb77860,ffff80003bb77808,ffff80003bb777f8,0) at uvm_fault_check+0x43 sys/uvm/uvm_fault.c:693
uvm_fault(ffff800001c49018,992000,0,2) at uvm_fault+0x1e7 sys/uvm/uvm_fault.c:627
kpageflttrap(ffff80003bb77b40,992480) at kpageflttrap+0x41e sys/arch/amd64/amd64/trap.c:283
kerntrap(ffff80003bb77b40) at kerntrap+0x1b6 sys/arch/amd64/amd64/trap.c:528
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x59
syscall(ffff80003bb78130) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003bb78130) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x233942b91a0, count: -14
ddb{1}>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#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: 7c61c2d2eaf2 Fix checkalias contract to register the vnode..
git tree: https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan
console output: https://syzkaller.appspot.com/x/log.txt?x=1282e351580000
kernel config: https://syzkaller.appspot.com/x/.config?x=85e25e37d09e1b88
dashboard link: https://syzkaller.appspot.com/bug?extid=7f96d1ae30eae229ea32
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0f6409b719e5/disk-7c61c2d2.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/645cca046c7d/bsd-7c61c2d2.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/daa40b48d8c6/kernel-7c61c2d2.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7f96d1...@syzkaller.appspotmail.com
witness: lock_object uninitialized: 0xffffffff851c4690
Starting stack trace...
witness_debugger(1) at witness_debugger+0xb2 sys/kern/subr_witness.c:2572
witness_checkorder(ffffffff851c4690,9,0) at witness_checkorder+0x19c sys/kern/subr_witness.c:783
mtx_enter(ffffffff851c4680) at mtx_enter+0x105 sys/kern/kern_lock.c:406
kqueue_register(ffffffff851c4680,ffff8000297fe660,0,0) at kqueue_register+0x3ab sys/kern/kern_event.c:1445
knote_processfork(ffff8000298039c0,17458) at knote_processfork+0x5b1 sys/kern/kern_event.c:2286
fork1(ffff800045fffc88,1,ffffffff83a58850,0,ffff8000297fe8e0,0) at fork1+0x1225 sys/kern/kern_fork.c:511
syscall(ffff8000297fe980) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000297fe980) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x701707937530, count: 249
End of stack trace.
Stopped at db_enter+0x17: popq %rbp
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> show kasan
kasan: no report recorded this boot
ddb{0}> trace
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
witness_checkorder(ffffffff851c4690,9,0) at witness_checkorder+0x19c sys/kern/subr_witness.c:783
mtx_enter(ffffffff851c4680) at mtx_enter+0x105 sys/kern/kern_lock.c:406
kqueue_register(ffffffff851c4680,ffff8000297fe660,0,0) at kqueue_register+0x3ab sys/kern/kern_event.c:1445
knote_processfork(ffff8000298039c0,17458) at knote_processfork+0x5b1 sys/kern/kern_event.c:2286
fork1(ffff800045fffc88,1,ffffffff83a58850,0,ffff8000297fe8e0,0) at fork1+0x1225 sys/kern/kern_fork.c:511
syscall(ffff8000297fe980) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000297fe980) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x701707937530, count: -8
ddb{0}> show registers
rdi 0x3
rsi 0x3
rbp 0xffff8000297fe1f0
rbx 0
rdx 0
rcx 0xffffffff851c3ff0 cpu_info_full_primary+0x1ff0
rax 0
r8 0xffff8000297fe120
r9 0xffff8000297fdf60
r10 0xffff8000297fdef8
r11 0xffffffff831c6730 x86_bus_space_io_read_1
r12 0xffffffff851c4690 cpu_info_full_primary+0x2690
r13 0x4
r14 0
r15 0xffffffff851c46b0 cpu_info_full_primary+0x26b0
rip 0xffffffff82e89947 db_enter+0x17
cs 0x8
rflags 0x246
rsp 0xffff8000297fe1f0
ss 0x10
db_enter+0x17: popq %rbp
ddb{0}> show proc
PROC (init) tid=5300 pid=1 tcnt=1 stat=onproc
flags process=2<EXEC> proc=0
runpri=17, usrpri=54, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffffffff854d7ca0,0xffff800045fff768
process=0xffff8000298039c0 user=0xffff8000297f3000, vmspace=0xffff800000d8a1e8
estcpu=4, cpticks=21, pctcpu=0.0, user=0, sys=20, intr=0
ddb{0}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
95320 320920 1 0 2 0 0 init
69175 91808 30780 0 2 0x10 0xc80 syz-executor
69175 286897 30780 0 3 0x10 0x4000080 fifow syz-executor
69175 247674 30780 0 3 0x10 0x4000080 fsleep syz-executor
62220 441636 72782 0 3 0x1000 0x2000 suspend syz-executor
62220 28883 72782 0 7 0x1000 0x4080000 syz-executor
62220 243249 72782 0 2 0x1000 0x4080000 syz-executor
62220 99969 72782 0 2 0x1000 0x4080000 syz-executor
24050 452237 27522 0 2 0x10000002 0 syz-executor
86950 197226 27522 0 2 0x2 0xc80 syz-executor
79024 308667 27522 0 2 0x2 0 syz-executor
7333 60515 27522 0 2 0x2 0 syz-executor
30780 56229 27522 0 2 0x2 0xc80 syz-executor
71535 151774 27522 0 2 0x10000002 0xc80 syz-executor
72782 191389 27522 0 3 0x2 0x80 wait syz-executor
8141 113354 27522 0 2 0x10000002 0xc80 syz-executor
27522 3287 14280 0 3 0x2 0x80 kqread syz-executor
14280 138279 1 0 3 0x100002 0x80 nanoslp ksh
25463 251608 1 0 3 0x2 0x88 kqread sshd
94240 210716 9685 74 3 0x1100012 0x80 bpf pflogd
9685 510522 1 0 3 0 0x80 sbwait pflogd
57621 85716 67363 73 2 0x1100010 0x80 syslogd
67363 65053 1 0 3 0x100002 0x80 sbwait syslogd
63480 352423 1 0 3 0x100000 0x80 kqread resolvd
79619 477095 68284 77 3 0x100012 0x80 kqread dhcpleased
20403 288742 68284 77 3 0x100012 0x80 kqread dhcpleased
68284 260376 1 0 3 0 0x80 kqread dhcpleased
29832 63552 0 0 2 0x14000 0x40000200 smr
39538 282891 0 0 2 0x14000 0x200 zerothread
15208 76253 0 0 3 0x14000 0x200 aiodoned aiodoned
87091 112908 0 0 3 0x14000 0x200 syncer update
76436 341895 0 0 3 0x14000 0x200 cleaner cleaner
87629 428826 0 0 3 0x14000 0x200 reaper reaper
5569 243139 0 0 3 0x14000 0x200 pgdaemon pagedaemon
1600 429019 0 0 3 0x14000 0x200 bored viomb
28866 168435 0 0 3 0x14000 0x40000200 acpi0 acpi0
84115 262756 0 0 3 0x14000 0x40000200 idle1
28104 223824 0 0 3 0x14000 0x200 bored softnet1
69351 374817 0 0 2 0x14000 0x200 softnet0
48813 278769 0 0 2 0x14000 0x200 systqmp
16103 315988 0 0 3 0x14000 0x200 bored systq
93484 324882 0 0 2 0x14000 0x200 softclockmp
8392 451041 0 0 3 0x14000 0x40000200 tmoslp softclock
1347 245407 0 0 3 0x14000 0x40000200 idle0
* 1 5300 0 0 7 0x2 0 init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{0}> show all locks
Process 62220 (syz-executor) thread 0xffff800045ffc2b0 (28883)
shared rwlock vmmaplk r = 0 (0xffff800001c49118)
#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_read+0x55d sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x1a2 sys/uvm/uvm_fault.c:-1
#3 uvm_fault_check+0x43 sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x1e7 sys/uvm/uvm_fault.c:627
#5 kpageflttrap+0x41e sys/arch/amd64/amd64/trap.c:283
#6 kerntrap+0x1b6 sys/arch/amd64/amd64/trap.c:528
#7 alltraps_kern_meltdown+0x7b
#8 copyout+0x59
#9 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#10 Xsyscall+0x128
Process 79024 (syz-executor) thread 0xffff800045ffda08 (308667)
exclusive rrwlock inode r = 0 (0xffff8000019d4c30)
#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 rrw_enter+0xf0 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0x17e sys/kern/vfs_vops.c:527
#4 vn_lock+0xca sys/kern/vfs_vnops.c:576
#5 vget+0x321 sys/kern/vfs_subr.c:698
#6 ufs_ihashget+0x233 sys/ufs/ufs/ufs_ihash.c:98
#7 ffs_vget+0x10b sys/ufs/ffs/ffs_vfsops.c:1203
#8 ufs_lookup+0x1529 sys/ufs/ufs/ufs_lookup.c:478
#9 VOP_LOOKUP+0xda sys/kern/vfs_vops.c:85
#10 vfs_lookup+0xfbd sys/kern/vfs_lookup.c:580
#11 namei+0xe19 sys/kern/vfs_lookup.c:250
#12 dounlinkat+0x102 sys/kern/vfs_syscalls.c:1807
#13 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xffff800001c02588)
#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 rrw_enter+0xf0 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0x17e sys/kern/vfs_vops.c:527
#4 vn_lock+0xca sys/kern/vfs_vnops.c:576
#5 vfs_lookup+0x1f7 sys/kern/vfs_lookup.c:431
#6 namei+0xe19 sys/kern/vfs_lookup.c:250
#7 dounlinkat+0x102 sys/kern/vfs_syscalls.c:1807
#8 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#9 Xsyscall+0x128
Process 7333 (syz-executor) thread 0xffff800045ffdca0 (60515)
exclusive rrwlock inode r = 0 (0xffff800001c4f7e0)
#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 rrw_enter+0xf0 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0x17e sys/kern/vfs_vops.c:527
#4 vn_lock+0xca sys/kern/vfs_vnops.c:576
#5 vn_closefile+0x1b2 vn_close sys/kern/vfs_vnops.c:298 [inline]
#5 vn_closefile+0x1b2 sys/kern/vfs_vnops.c:621
#6 fdrop+0x1c3 sys/kern/kern_descrip.c:1281
#7 closef+0x263 sys/kern/kern_descrip.c:1265
#8 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#9 Xsyscall+0x128
Process 1 (init) thread 0xffff800045fffc88 (5300)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff85435b40)
#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 11062 12247K 12635K 166960K 12309 0
pcb 17 28K 30K 166960K 40 0
rtable 237 12K 13K 166960K 357 0
pf 34 22K 22K 166960K 45 0
ifaddr 43 12K 12K 166960K 45 0
ifgroup 55 2K 2K 166960K 55 0
sysctl 1 1K 13K 166960K 6 0
counters 70 42K 42K 166960K 70 0
ioctlops 0 0K 4K 166960K 1556 0
iov 0 0K 4K 166960K 4 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1307 84K 84K 166960K 1425 0
UFS quota 1 36K 36K 166960K 1 0
UFS mount 5 44K 44K 166960K 5 0
shm 2 2K 6K 166960K 5 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 13 45K 93K 166960K 199 0
sigio 0 0K 0K 166960K 2 0
proc 62 112K 177K 166960K 560 0
subproc 72 9K 9K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 20K 20K 166960K 1 0
ip_moptions 0 0K 0K 166960K 2 0
in_multi 99 7K 7K 166960K 99 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 10 0
ISOFS mount 1 36K 36K 166960K 1 0
MSDOSFS mount 1 20K 20K 166960K 1 0
ttys 49 344K 344K 166960K 49 0
exec 0 0K 2K 166960K 383 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 186 222K 252K 166960K 3653 0
UVM aobj 6 4K 4K 166960K 6 0
pinsyscall 1057 1729K 1738K 166960K 1359 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
NDP 12 0K 2K 166960K 28 0
temp 35 9166K 9178K 166960K 4116 0
kqueue 14 38K 62K 166960K 44 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 34 0 31 1 0 1 1 0 8 0
rtentry 176 114 0 4 6 0 6 6 0 8 0
unpcb 144 109 0 93 2 0 2 2 0 8 1
syncache 336 4 0 4 2 1 1 1 0 8 1
tcpcb 736 19 0 16 1 0 1 1 0 8 0
arp 136 19 0 1 1 0 1 1 0 8 0
inpcb 328 173 0 166 7 0 7 7 0 8 6
nd6 152 24 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 1429 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1429 0 714 21 0 21 21 0 8 0
pfstitem 24 23 0 0 1 0 1 1 0 8 0
pfstkey 128 23 0 0 1 0 1 1 0 8 0
pfstate 448 23 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 256 456 0 2 29 0 29 29 0 8 0
art_table 40 457 0 2 5 0 5 5 0 8 0
art_node 32 114 0 14 1 0 1 1 0 8 0
semapl 72 1 0 0 1 0 1 1 0 8 0
shmpl 112 3 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1693 0 222 93 0 93 93 0 8 0
ffsino 296 1693 0 222 114 0 114 114 0 8 0
nchpl 144 1995 0 283 64 0 64 64 0 8 0
vnodes 216 1818 0 0 101 0 101 101 0 8 0
namei 1024 6432 0 6432 1 0 1 1 0 8 1
percpumem 16 51 0 0 1 0 1 1 0 8 0
kstatmem 264 27 0 0 2 0 2 2 0 8 0
scxspl 216 7169 0 7169 2 1 1 2 1 8 1
plimitpl 152 34 0 19 1 0 1 1 0 8 0
sigapl 424 517 0 473 7 0 7 7 0 8 1
knotepl 120 144 0 0 5 0 5 5 0 8 0
kqueuepl 224 49 0 39 2 0 2 2 0 8 1
pipepl 344 136 0 109 3 0 3 3 0 8 0
fdescpl 528 501 0 476 3 0 3 3 0 8 0
filepl 160 2073 0 1863 13 0 13 13 0 8 2
lockfpl 104 43 0 41 1 0 1 1 0 8 0
lockfspl 48 21 0 19 1 0 1 1 0 8 0
sessionpl 144 36 0 29 1 0 1 1 0 8 0
pgrppl 48 45 0 30 1 0 1 1 0 8 0
ucredpl 104 160 0 147 1 0 1 1 0 8 0
zombiepl 144 478 0 473 1 0 1 1 0 8 0
processpl 1232 517 0 473 5 0 5 5 0 8 0
procpl 664 629 0 580 6 0 6 6 0 8 1
sosppl 176 1 0 1 1 0 1 1 0 8 1
sockpl 752 317 0 291 11 0 11 11 0 8 7
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 115 0 0 15 0 15 15 0 8 0
mcl2k 2048 19 0 0 3 0 3 3 0 8 0
mextrefs 64 19 0 0 1 0 1 1 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 137 0 0 9 0 9 9 0 8 0
bufpl 272 2467 0 107 158 0 158 158 0 8 0
anonpl 32 8374 0 0 68 0 68 68 0 222 0
amapchunkpl 152 10514 0 10154 21 0 21 21 0 158 3
amappl16 200 2197 0 1934 16 1 15 15 0 8 1
amappl15 192 8 0 7 1 0 1 1 0 8 0
amappl14 184 431 0 430 1 0 1 1 0 8 0
amappl13 176 125 0 114 1 0 1 1 0 8 0
amappl12 168 768 0 745 2 0 2 2 0 8 0
amappl11 160 8 0 8 1 0 1 1 0 8 1
amappl10 152 100 0 86 1 0 1 1 0 8 0
amappl9 144 278 0 278 1 1 0 1 0 8 0
amappl8 136 99 0 97 1 0 1 1 0 8 0
amappl7 128 162 0 151 1 0 1 1 0 8 0
amappl6 120 154 0 153 1 0 1 1 0 8 0
amappl5 112 96 0 87 1 0 1 1 0 8 0
amappl4 104 314 0 294 1 0 1 1 0 8 0
amappl3 96 1851 0 1770 4 0 4 4 0 8 1
amappl2 88 553 0 505 2 0 2 2 0 8 0
amappl1 80 11065 0 10663 14 0 14 14 0 8 2
amappl 88 2911 0 2788 4 0 4 4 0 92 0
uvmvnodes 80 100 0 0 3 0 3 3 0 8 0
dma4096 4096 2 0 2 2 1 1 1 0 8 1
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 5 0 0 1 0 1 1 0 8 0
uaddrrnd 24 501 0 476 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 501 0 476 1 0 1 1 0 8 0
vmmpekpl 168 6310 0 6276 2 0 2 2 0 8 0
vmmpepl 168 42163 0 40551 92 0 92 92 0 357 5
vmsppl 488 500 0 476 5 0 5 5 0 8 1
rwobjpl 80 15922 0 14844 26 0 26 26 0 8 0
pdppl 4096 1011 0 952 97 26 71 87 0 8 12
pvpl 32 15332 0 0 124 0 124 124 0 265 0
pmappl 256 500 0 476 3 0 3 3 0 8 0
extentpl 40 47 0 29 1 0 1 1 0 8 0
phpool 120 425 0 30 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
witness_checkorder(ffffffff851c4690,9,0) at witness_checkorder+0x19c sys/kern/subr_witness.c:783
mtx_enter(ffffffff851c4680) at mtx_enter+0x105 sys/kern/kern_lock.c:406
kqueue_register(ffffffff851c4680,ffff8000297fe660,0,0) at kqueue_register+0x3ab sys/kern/kern_event.c:1445
knote_processfork(ffff8000298039c0,17458) at knote_processfork+0x5b1 sys/kern/kern_event.c:2286
fork1(ffff800045fffc88,1,ffffffff83a58850,0,ffff8000297fe8e0,0) at fork1+0x1225 sys/kern/kern_fork.c:511
syscall(ffff8000297fe980) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000297fe980) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x701707937530, count: -8
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x19: leave
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
__asan_load4_noabort(10) at __asan_load4_noabort+0x8 sys/kern/subr_kasan.c:1098
vm_map_unlock_read_ln(ffff800001c49018,ffffffff84db9f00,719) at vm_map_unlock_read_ln+0x2a sys/uvm/uvm_map.c:5224
uvmfault_lookup(ffff80003bb77860,0) at uvmfault_lookup+0x397 sys/uvm/uvm_fault.c:1882
uvm_fault_check(ffff80003bb77860,ffff80003bb77808,ffff80003bb777f8,0) at uvm_fault_check+0x43 sys/uvm/uvm_fault.c:693
uvm_fault(ffff800001c49018,992000,0,2) at uvm_fault+0x1e7 sys/uvm/uvm_fault.c:627
kpageflttrap(ffff80003bb77b40,992480) at kpageflttrap+0x41e sys/arch/amd64/amd64/trap.c:283
kerntrap(ffff80003bb77b40) at kerntrap+0x1b6 sys/arch/amd64/amd64/trap.c:528
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x59
syscall(ffff80003bb78130) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003bb78130) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x233942b91a0, count: -14
ddb{1}>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
Reply all
Reply to author
Forward
0 new messages