kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Thu Jan 24 09:45:29 PST 2019 OpenBSD/amd64 (ci-openbsd-multicore-6.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. 2019/01/24 09:45:59 parsed 1 programs 2019/01/24 09:46:04 executed programs: 0 2019/01/24 09:46:09 executed programs: 21 login: Thread 0xffff800020be5078 exiting with the following locks held: exclusive rrwlock inode r = 0 (0xfffffd8070a0ad68) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_vnops.c:1547 panic: Thread 0xffff800020be5078 cannot exit while holding sleeplocks Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 293068 71408 0 0x2 0x480 0 syz-executor0 *238497 23422 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 panic() at panic+0x16c witness_thread_exit(7994618d0978cc95) at witness_thread_exit+0x244 reaper(0) at reaper+0x14f end trace frame: 0x0, count: 11 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 Thread 0xffff800020be5078 cannot exit while holding sleeplocks ddb{1}>