panic: witness_warn
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 485455  83635  32767        0x10          0    0  syz-executor1
*120295  83635  32767        0x10  0x4000000    1  syz-executor1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399
panic() at panic+0x16c sys/kern/subr_prf.c:208
witness_warn(bd48d4556b687497,0,ffff800020b92bd0) at witness_warn+0x6e0 witness_debugger sys/kern/subr_witness.c:2546 [inline]
witness_warn(bd48d4556b687497,0,ffff800020b92bd0) at witness_warn+0x6e0 sys/kern/subr_witness.c:1462
userret(9439c9f00a600a4e) at userret+0x361 sys/kern/kern_sig.c:1899
syscall(95d37f4e4d09df6e) at syscall+0x680 mi_syscall_return sys/sys/syscall_mi.h:122 [inline]
syscall(95d37f4e4d09df6e) at syscall+0x680 sys/arch/amd64/amd64/trap.c:605
Xsyscall(6,5,c,0,3,c8b9c1ef0d8) at Xsyscall+0x128
end of kernel
end trace frame: 0xc8e8fd85b00, count: 9
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}> show panic
witness_warn
ddb{1}>