uvm_fault(0xffffffff83a32b18, 0xffff800026a82004, 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
*264771  55427      0         0x2          0    0  syz-executor
ufs_readdir(ffff80002a7d1960) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397
VOP_READDIR(fffffd807a406518,ffff80002a7d19e8,fffffd8007ffd8f0,ffff80002a7d1a2c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453
sys_getdents(ffff80002a766d08,ffff80002a7d1b70,ffff80002a7d1ac0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219
syscall(ffff80002a7d1b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7d1b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7440686d8350, 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(0xffffffff83a32b18, 0xffff800026a82004, 0, 1) -> d
ddb> trace
ufs_readdir(ffff80002a7d1960) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397
VOP_READDIR(fffffd807a406518,ffff80002a7d19e8,fffffd8007ffd8f0,ffff80002a7d1a2c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453
sys_getdents(ffff80002a766d08,ffff80002a7d1b70,ffff80002a7d1ac0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219
syscall(ffff80002a7d1b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7d1b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7440686d8350, count: -5
ddb> show registers
rdi                            0x200
rsi                            0x800
rbp               0xffff80002a7d1950
rbx                            0x200
rdx                                0
rcx               0xfffffd8060ce2b20
rax               0xffff800026a82200
r8                0xffffffffffffffff
r9                               0x3
r10               0x6fdde79a6d8ff262
r11               0x81070a85c34a09c0
r12                                0
r13               0xffff80002a7d19e8
r14               0xffff800026a82000
r15               0xffff800026a82008
rip               0xffffffff8293174e    ufs_readdir+0x26e
cs                               0x8
rflags                       0x10283    __ALIGN_SIZE+0xf283
rsp               0xffff80002a7d17a0
ss                              0x10
ufs_readdir+0x26e:      movzwl  0x4(%r14),%ebx
ddb>