uvm_fault(0xffffffff83631c18, 0xffff8000012ec008, 0, 2) -> e
kernel: page fault trap, code=2
Stopped at unveil_add_vnode+0xda: movq %rax,0x8(%r14,%r13,1)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*445828 73764 32767 0x502010 0x4080000 0K syz-executor
505984 77683 0 0x2 0 1 syz-executor
unveil_add_vnode(ffff8000fffeb1e0,fffffd80724c8058) at unveil_add_vnode+0xda sys/kern/kern_unveil.c:391
unveil_add(ffff8000fffeb1e0,ffff80003618e888,ffff80003618e943) at unveil_add+0x448 sys/kern/kern_unveil.c:494
sys_unveil(ffff8000fffeb1e0,ffff80003618ea70,ffff80003618e9c0) at sys_unveil+0x60c sys/kern/vfs_syscalls.c:1020
syscall(ffff80003618ea70) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff80003618ea70) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc6851022b40, 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(0xffffffff83631c18, 0xffff8000012ec008, 0, 2) -> e
ddb{0}> trace
unveil_add_vnode(ffff8000fffeb1e0,fffffd80724c8058) at unveil_add_vnode+0xda sys/kern/kern_unveil.c:391
unveil_add(ffff8000fffeb1e0,ffff80003618e888,ffff80003618e943) at unveil_add+0x448 sys/kern/kern_unveil.c:494
sys_unveil(ffff8000fffeb1e0,ffff80003618ea70,ffff80003618e9c0) at sys_unveil+0x60c sys/kern/vfs_syscalls.c:1020
syscall(ffff80003618ea70) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff80003618ea70) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc6851022b40, count: -5
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff80003618e7b0
rbx 0xffff8000fffee8e8
rdx 0
rcx 0xffff8000fffeb1e0
rax 0xffffffffffffffff
r8 0x40
r9 0xfffffd807f7d33a8
r10 0xd41136c060bfa4ed
r11 0x5529364202aa6699
r12 0xfffffd80724c8058
r13 0
r14 0xffff8000012ec000
r15 0
rip 0xffffffff82497e0a unveil_add_vnode+0xda
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80003618e740
ss 0
unveil_add_vnode+0xda: movq %rax,0x8(%r14,%r13,1)
ddb{0}> show proc
PROC (syz-executor) tid=445828 pid=73764 tcnt=4 stat=onproc
flags process=502010<SUGID,SINGLEUNWIND,PLEDGE,EXECPLEDGE> proc=4080000<SUSPSINGLE,THREAD>
runpri=32, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff8000fffea7c0 scnt=1 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000fffebc00,0xffff8000fffea7d0
process=0xffff8000fffee8e8 user=0xffff800036189000, vmspace=0xfffffd806c0a9c60
estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
8504 483972 48271 32767 2 0x10 syz-executor
73764 516688 97227 32767 4 0x582010 syz-executor
*73764 445828 97227 32767 7 0x4582010 syz-executor
73764 264392 97227 32767 3 0x4502010 suspend syz-executor
73764 366021 97227 32767 4 0x4582010 syz-executor
77683 505984 96143 0 7 0x2 syz-executor
82642 81052 5627 32767 3 0x90 nanoslp syz-executor
82642 120492 5627 32767 3 0x4000090 netacc syz-executor
82642 142597 5627 32767 3 0x4000090 kqsel syz-executor
1383 243923 44891 32767 3 0x90 nanoslp syz-executor
1383 497024 44891 32767 3 0x4000090 lockf syz-executor
1383 212672 44891 32767 3 0x4000090 fsleep syz-executor
1953 285620 0 0 3 0x14200 bored sosplice
33210 184414 6551 0 3 0x100082 sbwait ndp
6551 397933 40786 0 3 0x10008a sigsusp sh
44891 58116 50676 32767 3 0x90 nanoslp syz-executor
97227 296873 94353 32767 2 0x490 syz-executor
5627 484700 92875 32767 3 0x90 nanoslp syz-executor
40786 284037 95485 0 3 0x80 wait syz-executor
50288 460593 86203 32767 3 0x90 wait syz-executor
48271 187992 43620 32767 3 0x90 nanoslp syz-executor
94353 208789 96143 0 3 0x82 wait syz-executor
95485 81413 96143 0 3 0x82 wait syz-executor
92875 141933 96143 0 3 0x82 wait syz-executor
43620 466113 96143 0 3 0x82 wait syz-executor
86203 400042 96143 0 3 0x82 wait syz-executor
50676 442817 96143 0 3 0x82 wait syz-executor
96143 113502 14738 0 3 0x82 nanoslp syz-executor
14738 234117 24926 0 3 0x10008a sigsusp ksh
24926 114168 13594 0 3 0x98 kqread sshd-session
13594 141671 65888 0 3 0x92 kqread sshd-session
90426 188929 1 0 3 0x100083 ttyin getty
65888 149309 1 0 3 0x88 kqread sshd
44963 489971 94977 73 3 0x1100090 kqread syslogd
94977 513502 1 0 3 0x100082 sbwait syslogd
96853 97286 1 0 3 0x100080 kqread resolvd
92814 381317 55674 77 3 0x100092 kqread dhcpleased
9236 156638 55674 77 3 0x100092 kqread dhcpleased
55674 344757 1 0 3 0x80 kqread dhcpleased
19685 150428 0 0 3 0x14200 bored smr
11358 375360 0 0 3 0x14200 pgzero zerothread
70478 521674 0 0 3 0x14200 aiodoned aiodoned
65636 3528 0 0 3 0x14200 syncer update
13196 437425 0 0 3 0x14200 cleaner cleaner
62446 267708 0 0 3 0x14200 reaper reaper
75260 478964 0 0 3 0x14200 pgdaemon pagedaemon
42536 75123 0 0 3 0x14200 bored viomb
11260 311544 0 0 3 0x40014200 acpi0 acpi0
53080 452441 0 0 3 0x40014200 idle1
21808 147710 0 0 3 0x14200 bored softnet3
22104 176912 0 0 3 0x14200 bored softnet2
20140 210376 0 0 3 0x14200 bored softnet1
49984 202904 0 0 3 0x14200 bored softnet0
62839 501022 0 0 3 0x14200 bored systqmp
60845 49362 0 0 3 0x14200 bored systq
46696 336235 0 0 3 0x14200 tmoslp softclockmp
29944 491871 0 0 3 0x40014200 tmoslp softclock
91077 179795 0 0 3 0x40014200 idle0
1 83302 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 73764 (syz-executor) thread 0xffff8000fffeb1e0 (445828)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8360b818)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 __mp_acquire_count+0x58
#2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441
#3 sleep_finish+0x2f2 sys/kern/kern_synch.c:425
#4 rw_enter+0x348 sys/kern/kern_rwlock.c:285
#5 rrw_enter+0xbe sys/kern/kern_rwlock.c:464
#6 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#7 vn_lock+0xa4 sys/kern/vfs_vnops.c:564
#8 vget+0x2bd sys/kern/vfs_subr.c:678
#9 ufs_ihashget+0x192 sys/ufs/ufs/ufs_ihash.c:98
#10 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201
#11 ufs_lookup+0x1631 sys/ufs/ufs/ufs_lookup.c:555
#12 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#13 unveil_find_cover+0x16d sys/kern/kern_unveil.c:277
#14 unveil_add_vnode+0xd1 sys/kern/kern_unveil.c:391
#15 unveil_add+0x448 sys/kern/kern_unveil.c:494
#16 sys_unveil+0x60c sys/kern/vfs_syscalls.c:1020
#17 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline]
#17 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#18 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10174 11042K 11059K 166960K 11258 0
pcb 17 12K 12K 166960K 17 0
rtable 188 5K 6K 166960K 348 0
pf 27 16K 16K 166960K 31 0
ifaddr 34 6K 7K 166960K 44 0
ifgroup 42 1K 2K 166960K 50 0
sysctl 2 0K 0K 166960K 2 0
counters 60 35K 36K 166960K 64 0
ioctlops 0 0K 2K 166960K 33 0
iov 0 0K 16K 166960K 8 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1364 86K 86K 166960K 1618 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 4 0
VM map 2 1K 1K 166960K 2 0
sem 6 0K 0K 166960K 7 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1690 195K 286K 166960K 12468 0
file desc 22 78K 125K 166960K 338 0
sigio 0 0K 0K 166960K 4 0
proc 58 79K 127K 166960K 482 0
subproc 78 4K 6K 166960K 338 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 26 0
in_multi 77 5K 7K 166960K 102 0
ether_multi 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 49 228K 228K 166960K 49 0
exec 0 0K 1K 166960K 373 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 230 57K 75K 166960K 4069 0
UVM aobj 7 2K 2K 166960K 7 0
pinsyscall 44 88K 114K 166960K 1333 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 7 0
NDP 9 0K 2K 166960K 27 0
temp 31 6814K 6879K 166960K 5031 0
kqueue 13 20K 26K 166960K 45 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 24 0 0 1 0 1 1 0 8 0
rtpcb 120 46 0 42 1 0 1 1 0 8 0
rtentry 112 111 0 24 4 0 4 4 0 8 0
unpcb 144 118 0 101 2 0 2 2 0 8 1
syncache 336 6 0 6 1 0 1 1 0 8 1
tcpqe 32 1 0 1 1 0 1 1 0 8 1
tcpcb 808 60 0 55 1 0 1 1 0 8 0
arp 120 18 0 4 1 0 1 1 0 8 0
ipq 40 3 0 1 1 0 1 1 0 8 0
ipqe 40 46 0 44 1 0 1 1 0 8 0
inpcb 336 419 0 410 10 0 10 10 0 8 8
nd6 136 24 0 7 1 0 1 1 0 8 0
kcovpl 48 26 0 20 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 454 0 90 29 0 29 29 0 8 3
art_table 32 455 0 90 4 0 4 4 0 8 0
art_node 16 110 0 31 1 0 1 1 0 8 0
sysvmsgpl 40 5 0 5 1 0 1 1 0 8 1
semupl 112 1 0 1 1 0 1 1 0 8 1
semapl 112 4 0 0 1 0 1 1 0 8 0
shmpl 112 4 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1748 0 226 96 0 96 96 0 8 0
ffsino 272 1748 0 226 102 0 102 102 0 8 0
nchpl 144 2103 0 410 63 0 63 63 0 8 0
uvmvnodes 80 2095 0 0 43 0 43 43 0 8 0
vnodes 216 2095 0 0 117 0 117 117 0 8 0
namei 1024 6502 0 6500 1 0 1 1 0 8 0
percpumem 16 46 0 2 1 0 1 1 0 8 0
kstatmem 264 22 0 4 2 0 2 2 0 8 0
scxspl 216 6363 0 6363 9 1 8 8 1 8 8
plimitpl 152 115 0 94 2 0 2 2 0 8 1
sigapl 424 575 0 522 8 0 8 8 0 8 0
futexpl 64 1807 0 1806 1 0 1 1 0 8 0
knotepl 120 288 0 0 9 0 9 9 0 8 0
kqueuepl 216 95 0 84 3 0 3 3 0 8 2
pipepl 320 180 0 153 3 0 3 3 0 8 0
fdescpl 496 556 0 522 7 1 6 6 0 8 0
filepl 152 2647 0 2431 15 0 15 15 0 8 4
lockfpl 104 62 0 57 1 0 1 1 0 8 0
lockfspl 48 24 0 20 1 0 1 1 0 8 0
sessionpl 144 41 0 27 1 0 1 1 0 8 0
pgrppl 48 71 0 50 1 0 1 1 0 8 0
ucredpl 104 138 0 122 1 0 1 1 0 8 0
zombiepl 144 523 0 522 1 0 1 1 0 8 0
processpl 1160 575 0 522 5 0 5 5 0 8 0
procpl 648 792 0 732 7 0 7 7 0 8 1
sockpl 664 586 0 556 11 0 11 11 0 8 7
mcl64k 65536 17 0 0 3 0 3 3 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 152 0 0 19 0 19 19 0 8 0
mcl2k 2048 37 0 0 5 0 5 5 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 335 0 0 21 0 21 21 0 8 0
bufpl 280 2323 0 95 160 0 160 160 0 8 0
anonpl 24 137510 0 134146 47 0 47 47 0 185 17
amapchunkpl 152 12838 0 12335 27 0 27 27 0 158 3
amappl16 200 3400 0 3390 15 1 14 14 0 8 13
amappl15 192 9 0 9 1 1 0 1 0 8 0
amappl14 184 108 0 97 1 0 1 1 0 8 0
amappl13 176 43 0 42 1 0 1 1 0 8 0
amappl12 168 1156 0 1124 2 0 2 2 0 8 0
amappl11 160 48 0 37 1 0 1 1 0 8 0
amappl10 152 33 0 33 1 1 0 1 0 8 0
amappl9 144 130 0 130 1 1 0 1 0 8 0
amappl8 136 19 0 17 1 0 1 1 0 8 0
amappl7 128 104 0 93 1 0 1 1 0 8 0
amappl6 120 166 0 163 1 0 1 1 0 8 0
amappl5 112 129 0 121 1 0 1 1 0 8 0
amappl4 104 291 0 274 1 0 1 1 0 8 0
amappl3 96 2434 0 2342 4 0 4 4 0 8 1
amappl2 88 837 0 756 3 0 3 3 0 8 0
amappl1 80 8117 0 7581 15 1 14 14 0 8 1
amappl 88 3703 0 3528 6 0 6 6 0 92 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 6 0 0 1 0 1 1 0 8 0
uaddrrnd 24 556 0 522 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 556 0 522 1 0 1 1 0 8 0
vmmpekpl 168 6546 0 6481 4 0 4 4 0 8 0
vmmpepl 168 42373 0 40549 100 0 100 100 0 357 7
vmsppl 448 555 0 522 5 0 5 5 0 8 0
rwobjpl 56 17523 0 14584 43 0 43 43 0 8 0
pdppl 4096 1119 0 1044 113 30 83 97 0 8 8
pvpl 32 14483 0 0 118 1 117 117 0 265 0
pmappl 248 555 0 522 4 1 3 3 0 8 0
extentpl 40 55 0 38 1 0 1 1 0 8 0
phpool 112 414 0 32 11 0 11 11 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
unveil_add_vnode(ffff8000fffeb1e0,fffffd80724c8058) at unveil_add_vnode+0xda sys/kern/kern_unveil.c:391
unveil_add(ffff8000fffeb1e0,ffff80003618e888,ffff80003618e943) at unveil_add+0x448 sys/kern/kern_unveil.c:494
sys_unveil(ffff8000fffeb1e0,ffff80003618ea70,ffff80003618e9c0) at sys_unveil+0x60c sys/kern/vfs_syscalls.c:1020
syscall(ffff80003618ea70) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff80003618ea70) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc6851022b40, count: -5
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
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(ffffffff8360b610) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff8360b610) at __mp_lock+0x199 sys/kern/kern_lock.c:144
syscall(ffff8000371b81d0) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff8000371b81d0) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x754e29508570, count: 9
ddb{1}> trace
x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
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(ffffffff8360b610) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff8360b610) at __mp_lock+0x199 sys/kern/kern_lock.c:144
syscall(ffff8000371b81d0) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff8000371b81d0) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x754e29508570, count: -6