Warning: Permanently added '10.128.10.24' (ECDSA) to the list of known hosts. 2019/01/31 10:18:06 parsed 1 programs 2019/01/31 10:18:12 executed programs: 0 2019/01/31 10:18:17 executed programs: 189 login: panic: vmmaplk: lock not shared Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 141546 18841 32767 0x10 0 0 syz-executor1 *481721 18841 32767 0x10 0x4000000 1K syz-executor1 db_enter() at db_enter+0x18 panic() at panic+0x16c _rw_exit_read(ffff800020bba720,2b0,ffff800020caaa78) at _rw_exit_read+0x12b uvm_fault(bb7a068215a8eb54,ffff800020bba720,0,ffffffff81d7f950) at uvm_fault+0x 23bb pageflttrap() at pageflttrap+0x216 kerntrap(f36968e77958211b) at kerntrap+0xeb alltraps_kern(6,4,80047462,0,fffffd806df68438,20000080) at alltraps_kern+0x7b copyin(35dca4fcf05386f5,10,ffff800020bba720,14a33ad0628,0,360) at copyin+0x56 syscall(d64ee200b8cbf6f4) at syscall+0x5a0 Xsyscall(6,0,ffffffffffffff51,0,3,147eb9871a0) at Xsyscall+0x128 end of kernel end trace frame: 0x14a33ad06b0, count: 5 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}>