panic: Caught invalid memory access at ffffffff84ecb9b4 size 4 op 0
Stopped at      db_enter+0x17:  popq    %rbp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*518147  43776      0           0  0x4000000    0K syz-executor
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff8463738e) at panic+0x270 sys/kern/subr_prf.c:198
__asan_load4_noabort(ffffffff84ecb9b4) at __asan_load4_noabort+0xa3
checkalias(ffff800001c4e488,19c76dc6) at checkalias+0x47d sys/kern/vfs_subr.c:603
ffs_vinit(ffff800000d80800,ffff80002994b200) at ffs_vinit+0x227 sys/ufs/ffs/ffs_subr.c:235
ffs_vget(ffff800000d80800,134e7,ffff80002994b3c0) at ffs_vget+0x748 sys/ufs/ffs/ffs_vfsops.c:1285
ufs_lookup() at ufs_lookup+0x15c1 sys/ufs/ufs/ufs_lookup.c:573
VOP_LOOKUP(ffff800001f32dc8,ffff80002994bb10,ffff80002994bb40) at VOP_LOOKUP+0xda sys/kern/vfs_vops.c:85
vfs_lookup(ffff80002994bae0) at vfs_lookup+0xfbd sys/kern/vfs_lookup.c:580
namei(ffff80002994bae0) at namei+0xe19 sys/kern/vfs_lookup.c:250
vn_open(ffff80002994bae0,102,0) at vn_open+0x240 sys/kern/vfs_vnops.c:146
sys_ktrace(ffff800045ffd240,ffff80002994bdd0,ffff80002994bd40) at sys_ktrace+0x10a sys/kern/kern_ktrace.c:565
syscall(ffff80002994bdd0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002994bdd0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6dc092bdd10, count: 1
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