panic: ffs_valloc: dup alloc
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 123520  79981      0           0          0    0  syz-executor
*138847  32045      0           0  0x4000000    1K syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83495ce7) at panic+0x1e5 sys/kern/subr_prf.c:198
ffs_inode_alloc(fffffd806c8bf710,8805,fffffd80097fd750,ffff80002a265c50) at ffs_inode_alloc+0x94e
ufs_makeinode(8805,fffffd806a33bcf8,ffff80002a265f88,ffff80002a265fb8) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732
ufs_create(ffff80002a265d00) at ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147
VOP_CREATE(fffffd806a33bcf8,ffff80002a265f88,ffff80002a265fb8,ffff80002a265d80) at VOP_CREATE+0xfe sys/kern/vfs_vops.c:103
vn_open(ffff80002a265f58,207,805) at vn_open+0x50d sys/kern/vfs_vnops.c:118
doopenat(ffff8000ffffc2a0,ffffff9c,200000000300,206,bbaf7815,0,1a5d17a8b1146688) at doopenat+0x35b sys/kern/vfs_syscalls.c:1161
sys_open(ffff8000ffffc2a0,ffff80002a266210,ffff80002a266160) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063
syscall(ffff80002a266210) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a266210) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf2219b663a0, count: 4
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{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: ffs_valloc: dup alloc
ddb{1}>