uvm_fault(0xffffffff83a99090, 0xffff80001c3f5ff8, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at      ffs_indirtrunc+0x699:   movq    0(%rax,%rbx,8),%rbx
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 181793  75193      0           0  0x4000000    1  syz-executor
*412570  37106      0         0x2          0    0K syz-executor
ffs_indirtrunc(fffffd800f916840,fffffffffffffff4,f0040,ffffffffffffffff,0,ffff80003c3e17f8) at ffs_indirtrunc+0x699 sys/ufs/ffs/ffs_inode.c:495
ffs_truncate(fffffd800f916840,0,0,ffffffffffffffff) at ffs_truncate+0x103f sys/ufs/ffs/ffs_inode.c:297
ufs_inactive(ffff80003c3e1950) at ufs_inactive+0x202 sys/ufs/ufs/ufs_inode.c:84
VOP_INACTIVE(fffffd805cea7048,ffff80003abbd248) at VOP_INACTIVE+0x104 sys/kern/vfs_vops.c:498
vput(fffffd805cea7048) at vput+0xe5 sys/kern/vfs_subr.c:789
VOP_REMOVE(fffffd805cea7480,fffffd805cea7048,ffff80003c3e1ab8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336
dounlinkat(ffff80003abbd248,ffffff9c,7ce14cecb450,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1929
syscall(ffff80003c3e1c30) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3e1c30) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7ce14cecb900, 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: uvm_fault(0xffffffff83a99090, 0xffff80001c3f5ff8, 0, 1) -> d
ddb{0}> trace
ffs_indirtrunc(fffffd800f916840,fffffffffffffff4,f0040,ffffffffffffffff,0,ffff80003c3e17f8) at ffs_indirtrunc+0x699 sys/ufs/ffs/ffs_inode.c:495
ffs_truncate(fffffd800f916840,0,0,ffffffffffffffff) at ffs_truncate+0x103f sys/ufs/ffs/ffs_inode.c:297
ufs_inactive(ffff80003c3e1950) at ufs_inactive+0x202 sys/ufs/ufs/ufs_inode.c:84
VOP_INACTIVE(fffffd805cea7048,ffff80003abbd248) at VOP_INACTIVE+0x104 sys/kern/vfs_vops.c:498
vput(fffffd805cea7048) at vput+0xe5 sys/kern/vfs_subr.c:789
VOP_REMOVE(fffffd805cea7480,fffffd805cea7048,ffff80003c3e1ab8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336
dounlinkat(ffff80003abbd248,ffffff9c,7ce14cecb450,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1929
syscall(ffff80003c3e1c30) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3e1c30) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7ce14cecb900, count: -9
ddb{0}> show registers
rdi                              0x2
rsi                              0x2
rbp               0xffff80003c3e16d0
rbx                            0x7ff
rdx                                0
rcx               0xffff80003abbd248
rax               0xffff80001c3f2000
r8                0xffffffffffffffff
r9                0xffff80003c3e17f8
r10               0x4d81264ed7e85712
r11               0xff32228888a9752c
r12               0xfffffffffffff7f6
r13                              0x1
r14                              0x2
r15               0xfffffd800f916840
rip               0xffffffff81625249    ffs_indirtrunc+0x699
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff80003c3e15e0
ss                              0x10
ffs_indirtrunc+0x699:   movq    0(%rax,%rbx,8),%rbx
ddb{0}> show proc
PROC (syz-executor) tid=412570 pid=37106 tcnt=1 stat=onproc
    flags process=2<EXEC> proc=0
    runpri=32, usrpri=86, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff8000fffee548,0xffff80003abbcd28
    process=0xffff800038fa61d0 user=0xffff80003c3dc000, vmspace=0xfffffd807ddb05d0
    estcpu=36, cpticks=23, pctcpu=0.11, user=2, sys=20, intr=1
ddb{0}>