kern.securelevel: 0 -> 1
creating runtime link editor directory cache.
preserving editor files.
starting network daemons: sshd.
starting local daemons:.
Wed Jan 23 23:54:35 PST 2019

OpenBSD/amd64 (ci-openbsd-setuid-4.c.syzkaller.internal) (tty00)

Warning: Permanently added '10.128.0.90' (ECDSA) to the list of known hosts.
2019/01/23 23:55:05 parsed 1 programs
2019/01/23 23:55:11 executed programs: 0
2019/01/23 23:55:16 executed programs: 66
login: userret: returning with the following locks held:

exclusive rrwlock inode r = 0 (0xfffffd806bb903d8) locked @ /syzkaller/managers/setuid/kernel/sys/ufs/ufs/ufs_vnops.c:1547

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

panic() at panic+0x16c

witness_warn(bd48d4556b687497,0,ffff800020b92bd0) at witness_warn+0x6e0

userret(9439c9f00a600a4e) at userret+0x361

syscall(95d37f4e4d09df6e) at syscall+0x680

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}>