uvm_fault(0xffffffff839bc2a8, 0xffff8000280b2004, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*183710 82069 0 0x2 0 0 syz-executor
ufs_readdir(ffff80002a869570) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397
VOP_READDIR(fffff10076cd21e8,ffff80002a8695f8,fffff10007ffd7b8,ffff80002a86963c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453
sys_getdents(ffff80002a7362a0,ffff80002a869780,ffff80002a8696d0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3133
syscall(ffff80002a869780) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a869780) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78b821186730, 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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: uvm_fault(0xffffffff839bc2a8, 0xffff8000280b2004, 0, 1) -> d
ddb> show kasan
No such command
ddb> trace
ufs_readdir(ffff80002a869570) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397
VOP_READDIR(fffff10076cd21e8,ffff80002a8695f8,fffff10007ffd7b8,ffff80002a86963c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453
sys_getdents(ffff80002a7362a0,ffff80002a869780,ffff80002a8696d0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3133
syscall(ffff80002a869780) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a869780) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78b821186730, count: -5
ddb> show registers
rdi 0x200
rsi 0x800
rbp 0xffff80002a869560
rbx 0x200
rdx 0
rcx 0xfffff1007ed62378
rax 0xffff8000280b2200
r8 0xffffffffffffffff
r9 0x2
r10 0x97ddafe5ed5cdead
r11 0xfc13b7a0867071a5
r12 0
r13 0xffff80002a8695f8
r14 0xffff8000280b2000
r15 0xffff8000280b2008
rip 0xffffffff8137d93e ufs_readdir+0x26e
cs 0x8
rflags 0x10283 __ALIGN_SIZE+0xf283
rsp 0xffff80002a8693b0
ss 0x10
ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx
ddb> show proc
PROC (syz-executor) tid=183710 pid=82069 tcnt=1 stat=onproc
flags process=2<EXEC> proc=0
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a736538,0xffff80002a7367e0
process=0xffff80002a79cd90 user=0xffff80002a864000, vmspace=0xfffff1007f01f008
estcpu=36, cpticks=6, pctcpu=0.1, user=0, sys=6, intr=0
ddb> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
70398 327911 19002 0 2 0 0xc80 syz-executor
70398 306353 19002 0 2 0 0x4000000 syz-executor
70398 370843 19002 0 3 0 0x4000080 fsleep syz-executor
51096 397667 37292 60928 2 0x10 0xc80 syz-executor
51096 424719 37292 60928 3 0x10 0x4000080 ttyretype syz-executor
51096 57976 37292 60928 3 0x10 0x4000080 fsleep syz-executor
66157 328128 75457 0 3 0 0x80 nanoslp syz-executor
66157 279685 75457 0 3 0 0x4000080 ttyout syz-executor
66157 394174 75457 0 3 0 0x4000080 fsleep syz-executor
45383 301488 88963 0 2 0 0xc80 syz-executor
45383 517461 88963 0 3 0 0x4000080 msgwait syz-executor
45383 34986 88963 0 3 0 0x4000080 fsleep syz-executor
37292 84866 98441 0 3 0x2 0x80 nanoslp syz-executor
21295 272283 1 0 3 0 0x80 nanoslp init
91975 6110 0 0 3 0x14000 0x280 nfsidl nfsio
35189 287041 0 0 3 0x14000 0x280 nfsidl nfsio
64417 90960 0 0 3 0x14000 0x280 nfsidl nfsio
89057 186436 0 0 3 0x14000 0x280 nfsidl nfsio
40092 389661 0 0 3 0x14000 0x280 nfsidl nfsio
11995 242878 0 0 3 0x14000 0x280 nfsidl nfsio
4121 45927 0 0 3 0x14000 0x280 nfsidl nfsio
77938 232823 0 0 3 0x14000 0x280 nfsidl nfsio
84278 66556 0 0 3 0x14000 0x280 nfsidl nfsio
41538 317404 0 0 3 0x14000 0x280 nfsidl nfsio
46953 377704 0 0 3 0x14000 0x280 nfsidl nfsio
87073 32362 0 0 3 0x14000 0x280 nfsidl nfsio
45486 435635 0 0 3 0x14000 0x280 nfsidl nfsio
62914 148363 0 0 3 0x14000 0x280 nfsidl nfsio
32001 248806 0 0 3 0x14000 0x280 nfsidl nfsio
65168 383826 0 0 3 0x14000 0x280 nfsidl nfsio
38500 320585 0 0 3 0x14000 0x280 nfsidl nfsio
71895 322005 0 0 3 0x14000 0x280 nfsidl nfsio
80307 220224 0 0 3 0x14000 0x280 nfsidl nfsio
73924 66066 0 0 3 0x14000 0x280 nfsidl nfsio
75457 449037 98441 0 3 0x2 0x80 nanoslp syz-executor
97414 341230 0 0 3 0x14000 0x200 acct acct
54278 486933 98441 0 3 0x2 0x80 wait syz-executor
*82069 183710 98441 0 7 0x2 0 syz-executor
88963 302064 98441 0 2 0x2 0xc80 syz-executor
19002 327320 98441 0 2 0x2 0xc80 syz-executor
13318 452861 98441 0 3 0x2 0x80 wait syz-executor
98441 512356 1 0 3 0x2 0x80 wait syz-executor
55606 89403 0 0 3 0x14000 0x200 bored smr
47523 453035 0 0 2 0x14000 0x200 zerothread
46982 370862 0 0 3 0x14000 0x200 aiodoned aiodoned
59560 82807 0 0 3 0x14000 0x200 syncer update
12485 214962 0 0 3 0x14000 0x200 cleaner cleaner
98000 217685 0 0 3 0x14000 0x200 reaper reaper
46014 519509 0 0 3 0x14000 0x200 pgdaemon pagedaemon
79873 497017 0 0 3 0x14000 0x200 bored viomb
28680 439632 0 0 3 0x14000 0x40000200 acpi0 acpi0
97198 120409 0 0 3 0x14000 0x200 bored softnet0
31584 244645 0 0 3 0x14000 0x200 bored systqmp
43589 437343 0 0 3 0x14000 0x200 bored systq
29855 431306 0 0 3 0x14000 0x40000200 tmoslp softclock
24340 242603 0 0 3 0x14000 0x40000200 idle0
1 29971 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11041 12170K 12401K 166960K 13033 0
pcb 18 13K 14K 166960K 270 0
rtable 221 7K 9K 166960K 526 0
pf 35 14K 20K 166960K 178 0
ifaddr 41 7K 8K 166960K 85 0
ifgroup 50 2K 2K 166960K 132 0
sysctl 4 1K 9K 166960K 43 0
counters 33 17K 18K 166960K 68 0
ioctlops 0 0K 4K 166960K 361 0
iov 1 0K 16K 166960K 45 0
mount 1 1K 1K 166960K 1 0
log 1 0K 0K 166960K 5 0
vnodes 1391 87K 88K 166960K 2242 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 15 0
VM map 2 1K 1K 166960K 2 0
sem 23 3K 3K 166960K 101 0
dirhash 12 2K 2K 166960K 21 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 15 57K 236K 166960K 909 0
sigio 0 0K 0K 166960K 12 0
proc 11 17K 83K 166960K 675 0
subproc 72 4K 4K 166960K 90 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 1 0K 0K 166960K 129 0
in_multi 95 6K 7K 166960K 145 0
ether_multi 1 0K 0K 166960K 5 0
mrt 0 0K 0K 166960K 22 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0