uvm_fault(0xffffffff83a2d578, 0xffff800022ba2004, 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
*250662  64079      0         0x2          0    0  syz-executor
ufs_readdir(ffff80002a7f1c30) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397
VOP_READDIR(fffff6006f64e538,ffff80002a7f1cb8,fffff60007ffd750,ffff80002a7f1cfc) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453
sys_getdents(ffff80002a766540,ffff80002a7f1e40,ffff80002a7f1d90) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132
syscall(ffff80002a7f1e40) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7f1e40) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78cb847f6330, 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(0xffffffff83a2d578, 0xffff800022ba2004, 0, 1) -> d
ddb> trace
ufs_readdir(ffff80002a7f1c30) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397
VOP_READDIR(fffff6006f64e538,ffff80002a7f1cb8,fffff60007ffd750,ffff80002a7f1cfc) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453
sys_getdents(ffff80002a766540,ffff80002a7f1e40,ffff80002a7f1d90) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132
syscall(ffff80002a7f1e40) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7f1e40) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78cb847f6330, count: -5
ddb>