syzbot

panic: missing alias
Starting stack trace...
panic(ffffffff8334eb34) at panic+0x1d0 sys/kern/subr_prf.c:229
vgonel(fffffd806c217630,ffff80002a296f80) at vgonel+0x681 sys/kern/vfs_subr.c:1217
checkalias(fffffd805f45cb58,e02,ffff800000b49800) at checkalias+0x1ab sys/kern/vfs_subr.c:-1
ffs_vinit(ffff800000b49800,ffff80003a404f90) at ffs_vinit+0x13d sys/ufs/ffs/ffs_subr.c:-1
ffs_vget(ffff800000b49800,196a4,ffff80003a405078) at ffs_vget+0x429 sys/ufs/ffs/ffs_vfsops.c:1285
ufs_lookup() at ufs_lookup+0x16bc sys/ufs/ufs/ufs_lookup.c:573
VOP_LOOKUP(fffffd806f526cc8,ffff80003a4054c8,ffff80003a4054f8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff80003a405498) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566
namei(ffff80003a405498) at namei+0x7aa sys/kern/vfs_lookup.c:250
vn_open(ffff80003a405498,1,0) at vn_open+0x13f sys/kern/vfs_vnops.c:140
doopenat(ffff80002a296f80,ffffff9c,200000000180,0,0,ffff80003a405640) at doopenat+0x32e sys/kern/vfs_syscalls.c:1137
syscall(ffff80003a4056f0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003a4056f0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:742
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x244340f05c0, count: 244
End of stack trace.