Warning: Permanently added '10.128.0.74' (ECDSA) to the list of known hosts. 2019/01/28 07:53:04 parsed 1 programs 2019/01/28 07:53:09 executed programs: 0 login: witness: thread 0xffff800020b74710 exiting with the following locks held: exclusive rrwlock inode r = 0 (0xfffffd806bec51b8) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_vnops.c:1547 panic: thread 0xffff800020b74710 cannot exit while holding sleeplocks Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 416840 73591 0 0x2 0x480 0 syz-executor1 *510801 60610 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 panic() at panic+0x16c witness_thread_exit(fc1352fcd7773ef2) 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 0xffff800020b74710 cannot exit while holding sleeplocks ddb{1}> trace db_enter() at db_enter+0x18 panic() at panic+0x16c witness_thread_exit(fc1352fcd7773ef2) at witness_thread_exit+0x244 reaper(0) at reaper+0x14f end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020b67590 rbx 0xffff800020b67630 rdx 0xffffffff81f3066d apollo_pio_rec+0x86ea rcx 0x201 rax 0x1 r8 0xffffffff817c1934 kprintf+0x174 r9 0x1 r10 0x71e62a3dc5660997 r11 0xa0afddf2049810cc r12 0x3000000008 r13 0xffff800020b675a0 r14 0x100 r15 0x1 rip 0xffffffff81598c38 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020b67580 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (reaper) pid=510801 stat=onproc flags process=14000 proc=200 pri=4, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020b20bb8,0xffff800020b21078 process=0xffff800020b5a698 user=0xffff800020b62000, vmspace=0xffffffff822f1200 estcpu=1, cpticks=3, pctcpu=0.4 user=0, sys=3, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 36793 435139 73591 0 2 0 syz-executor1 36793 343530 73591 0 3 0x4000000 inode syz-executor1 36793 48073 73591 0 3 0x4000080 fsleep syz-executor1 38100 498670 64508 0 2 0x3000 syz-executor0 73591 416840 38669 0 7 0x482 syz-executor1 64508 78326 38669 0 2 0x482 syz-executor0 38669 223182 84397 0 3 0x82 kqread syz-execprog 38669 165947 84397 0 3 0x4000082 thrsleep syz-execprog 38669 124916 84397 0 3 0x4000082 thrsleep syz-execprog 38669 28718 84397 0 3 0x4000082 thrsleep syz-execprog 38669 157476 84397 0 3 0x4000082 thrsleep syz-execprog 38669 453461 84397 0 3 0x4000082 thrsleep syz-execprog 38669 155546 84397 0 3 0x4000082 thrsleep syz-execprog 38669 284088 84397 0 3 0x4000082 thrsleep syz-execprog 38669 181370 84397 0 3 0x4000082 thrsleep syz-execprog 84397 379631 56058 0 3 0x10008a pause ksh 56058 199269 76037 0 3 0x92 select sshd 92317 79626 1 0 3 0x100083 ttyin getty 76037 310047 1 0 3 0x80 select sshd 61019 172544 54995 73 3 0x100010 ffs_fsync syslogd 54995 140403 1 0 3 0x100082 netio syslogd 7273 37805 1 77 3 0x100090 poll dhclient 84905 257587 1 0 3 0x80 poll dhclient 61927 119085 0 0 2 0x14200 zerothread 15295 63533 0 0 3 0x14200 aiodoned aiodoned 47229 453658 0 0 3 0x14200 syncer update 13954 2798 0 0 3 0x14200 cleaner cleaner *60610 510801 0 0 7 0x14200 reaper 76456 339877 0 0 3 0x14200 pgdaemon pagedaemon 33744 187689 0 0 3 0x14200 bored crynlk 28391 199294 0 0 3 0x14200 bored crypto 66941 515796 0 0 3 0x40014200 acpi0 acpi0 64867 198628 0 0 3 0x40014200 idle1 69110 35428 0 0 3 0x14200 bored softnet 34893 267444 0 0 3 0x14200 bored systqmp 20390 224936 0 0 3 0x14200 bored systq 78287 208768 0 0 3 0x40014200 bored softclock 40629 15546 0 0 3 0x40014200 idle0 1 57363 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}>