panic: witness_warn Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 76830 19078 0 0 0 0 syz-executor0 *226037 19078 0 0 0x4000000 1 syz-executor0 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(e759ce92773d77ca,0,ffff800020bbb530) at witness_warn+0x700 witness_debugger sys/kern/subr_witness.c:2549 [inline] witness_warn(e759ce92773d77ca,0,ffff800020bbb530) at witness_warn+0x700 sys/kern/subr_witness.c:1465 userret(f864ce2d90b679a9) at userret+0x361 sys/kern/kern_sig.c:1899 syscall(24632c0f0843167e) at syscall+0x680 mi_syscall_return sys/sys/syscall_mi.h:122 [inline] syscall(24632c0f0843167e) at syscall+0x680 sys/arch/amd64/amd64/trap.c:605 Xsyscall(6,9,ffffffffffffff28,0,2,24f24e8a268) at Xsyscall+0x128 end of kernel end trace frame: 0x25155e67cd0, 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.