kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Sun Jan 13 21:52:26 PST 2019 OpenBSD/amd64 (ci-openbsd-main-8.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.10.32' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program login: panic: fifo_badop called Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 13591 66636 0 0 0 0 syz-executor7705 db_enter() at db_enter+0x18 panic() at panic+0x147 fifo_badop(ffffffff8155e002) at fifo_badop+0x12 VOP_STRATEGY(58295b3d52b3ccf1) at VOP_STRATEGY+0x73 bwrite(29631de118140d93) at bwrite+0x1a1 VOP_BWRITE(1e474ee9fcc104e8) at VOP_BWRITE+0x4f ufs_mkdir(295c060a93b8273a) at ufs_mkdir+0x5a9 VOP_MKDIR(2ab59d7ac4f3a640,ffff8000149ec4c0,1ed,ffffff9c) at VOP_MKDIR+0x6d domkdirat(58af1e02137c511a,ffff800014a2ad40,ffff8000149ec4c0,ffff8000ffff73c0) a t domkdirat+0x11c syscall(737c34a5f5960929) at syscall+0x3de Xsyscall(6,88,14087,88,7f7fffff73a0,7f7fffff73c4) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff73f0, count: 4 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> ddb> set $lines = 0 ddb> show panic fifo_badop called ddb> trace db_enter() at db_enter+0x18 panic() at panic+0x147 fifo_badop(ffffffff8155e002) at fifo_badop+0x12 VOP_STRATEGY(58295b3d52b3ccf1) at VOP_STRATEGY+0x73 bwrite(29631de118140d93) at bwrite+0x1a1 VOP_BWRITE(1e474ee9fcc104e8) at VOP_BWRITE+0x4f ufs_mkdir(295c060a93b8273a) at ufs_mkdir+0x5a9 VOP_MKDIR(2ab59d7ac4f3a640,ffff8000149ec4c0,1ed,ffffff9c) at VOP_MKDIR+0x6d domkdirat(58af1e02137c511a,ffff800014a2ad40,ffff8000149ec4c0,ffff8000ffff73c0) at domkdirat+0x11c syscall(737c34a5f5960929) at syscall+0x3de Xsyscall(6,88,14087,88,7f7fffff73a0,7f7fffff73c4) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff73f0, count: -11 ddb> show registers rdi 0xffffffff81ef8a48 kprintf_mutex rsi 0x5 rbp 0xffff800014a2a780 rbx 0xffff800014a2a820 rdx 0x3fd rcx 0 rax 0x1 r8 0xffff800014a2a750 r9 0 r10 0xffff800014a2a580 r11 0x1ab53f9e73e579a5 r12 0x3000000008 r13 0xffff800014a2a790 r14 0x100 r15 0xffffffff81c54503 apollo_pio_rec+0x1456 rip 0xffffffff81854218 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800014a2a770 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor7705) pid=13591 stat=onproc flags process=0 proc=0 pri=17, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000149ec970,0xffff8000149ec278 process=0xffff8000ffff73c0 user=0xffff800014a25000, vmspace=0xffffff003f12b210 estcpu=36, cpticks=1, pctcpu=0.3 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 98755 478136 74728 0 2 0 syz-executor7705 *66636 13591 74728 0 7 0 syz-executor7705 74728 61155 73050 0 3 0x82 nanosleep syz-executor7705 73050 156267 15159 0 3 0x10008a pause ksh 15159 226182 51458 0 3 0x92 select sshd 10982 420602 1 0 3 0x100083 ttyin getty 51458 291548 1 0 3 0x80 select sshd 73456 39612 23241 73 3 0x100090 kqread syslogd 23241 331804 1 0 3 0x100082 netio syslogd 99520 523392 1 77 3 0x100090 poll dhclient 16809 215148 1 0 3 0x80 poll dhclient 80553 516731 0 0 3 0x14200 pgzero zerothread 85773 360585 0 0 3 0x14200 aiodoned aiodoned 43426 245313 0 0 3 0x14200 syncer update 63356 174938 0 0 3 0x14200 cleaner cleaner 13662 87698 0 0 3 0x14200 reaper reaper 8512 45468 0 0 3 0x14200 pgdaemon pagedaemon 25222 403787 0 0 3 0x14200 bored crynlk 79053 358042 0 0 3 0x14200 bored crypto 48382 471172 0 0 3 0x40014200 acpi0 acpi0 54372 139149 0 0 3 0x14200 bored softnet 30998 138607 0 0 3 0x14200 bored systqmp 59529 376853 0 0 3 0x14200 bored systq 8204 348144 0 0 3 0x40014200 bored softclock 38121 496732 0 0 3 0x40014200 idle0 1 358644 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper