˜2'¢uvm_fault(0xffffffff839dba20, 0xffff80001c9c2004, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at      ufs_lookup+0x623:       movzwl  0x4(%r15,%r14,1),%ebx
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 463575  41307      0        0x10          0    0  syz-executor
* 49933  41307      0        0x10  0x4000000    1K syz-executor
ufs_lookup() at ufs_lookup+0x623 sys/ufs/ufs/ufs_lookup.c:279
VOP_LOOKUP(fffffd805e67cde0,ffff80003939d628,ffff80003939d658) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff80003939d5f8) at vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
namei(ffff80003939d5f8) at namei+0x7c5 sys/kern/vfs_lookup.c:250
domknodat(ffff80002a222fa0,ffffff9c,200000000000,2000,6381) at domknodat+0xb4 sys/kern/vfs_syscalls.c:1617
syscall(ffff80003939d7f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003939d7f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2beafb85520, count: 8
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{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: uvm_fault(0xffffffff839dba20, 0xffff80001c9c2004, 0, 1) -> d
ddb{1}> trace
ufs_lookup() at ufs_lookup+0x623 sys/ufs/ufs/ufs_lookup.c:279
VOP_LOOKUP(fffffd805e67cde0,ffff80003939d628,ffff80003939d658) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff80003939d5f8) at vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
namei(ffff80003939d5f8) at namei+0x7c5 sys/kern/vfs_lookup.c:250
domknodat(ffff80002a222fa0,ffffff9c,200000000000,2000,6381) at domknodat+0xb4 sys/kern/vfs_syscalls.c:1617
syscall(ffff80003939d7f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003939d7f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2beafb85520, count: -7
ddb{1}> show registers
rdi                                0
rsi                              0x2
rbp               0xffff80003939d390
rbx                                0
rdx                                0
rcx               0xffff80002a222fa0
rax               0xffff80002999dff0
r8                0xffffffffffffffff
r9                0xfffffd80097fd340
r10               0xe47b57b528c5e427
r11               0xdf7f0e84421c90c6
r12               0xfffffd805d8d0c30
r13                                0
r14                                0
r15               0xffff80001c9c2000
rip               0xffffffff8286c5e3    ufs_lookup+0x623
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff80003939d2a0
ss                              0x10
ufs_lookup+0x623:       movzwl  0x4(%r15,%r14,1),%ebx
ddb{1}>