panic: ffs_valloc: dup alloc
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*283396  57572      0           0  0x4000000    0K syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8348a60f) at panic+0x1e5 sys/kern/subr_prf.c:198
ffs_inode_alloc(fffffd806c36ba90,2000,fffffd80097fd6e8,ffff80003a7a1fa0) at ffs_inode_alloc+0x94e
ufs_makeinode(2000,fffffd806d9b1998,ffff80003a7a21b8,ffff80003a7a21e8) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732
ufs_mknod(ffff80003a7a2060) at ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167
VOP_MKNOD(fffffd806d9b1998,ffff80003a7a21b8,ffff80003a7a21e8,ffff80003a7a20e8) at VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121
domknodat(ffff80002a221770,ffffff9c,200000000000,2000,285b9a) at domknodat+0x469 sys/kern/vfs_syscalls.c:1659
syscall(ffff80003a7a2380) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003a7a2380) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x26faab0aa00, 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}>