kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Sat Jul 27 17:06:59 PDT 2019 OpenBSD/amd64 (ci-openbsd-multicore-8.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.41' (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 login: witness: lock order reversal: 1st 0xfffffd806d8bc5f8 inode (&ip->i_lock) 2nd 0xfffffd806e6d7438 fdlock (&newfdp->fd_fd.fd_lock) lock order "&newfdp->fd_fd.fd_lock"(rwlock) -> "&ip->i_lock"(rrwlock) first seen at: #0 witness_checkorder+0x6a7 #1 rw_enter+0xd1 #2 rrw_enter+0x4f #3 VOP_LOCK+0x4b #4 vn_closefile+0x119 #5 fdrop+0xc9 #6 closef+0x11d #7 finishdup+0x2b6 #8 dodup3+0x5c5 #9 syscall+0x552 #10 Xsyscall+0x128 lock order "&ip->i_lock"(rrwlock) -> "&newfdp->fd_fd.fd_lock"(rwlock) first seen at: #0 witness_checkorder+0x6a7 #1 rw_enter_write+0x5b #2 doopenat+0x610 #3 syscall+0x552 #4 Xsyscall+0x128 Stopped at db_enter+0x18: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x18 witness_checkorder(fffffd806e6d7438,9,0) at witness_checkorder+0xffc rw_enter_write(fffffd806e6d7428) at rw_enter_write+0x5b doopenat(ffff800020b28c70,ffffff9c,200000c0,0,0,ffff800020be1b20) at doopenat+0x610 syscall(ffff800020be1b90) at syscall+0x552 Xsyscall(6,0,840a1110138,0,840a1110118,840a1110110) at Xsyscall+0x128 end of kernel end trace frame: 0x84381170600, count: -6 ddb{1}> show registers rdi 0x3 rsi 0xffffffff821bcce0 __sancov_gen_cov_switch_values.122 rbp 0xffff800020be1760 rbx 0x3 rdx 0x8b rcx 0x3 rax 0x3 r8 0xffffffff8111ee15 witness_checkorder+0xfd5 r9 0x5 r10 0x88e1117e8bfeb5c8 r11 0x1678a6a2d3a6fa57 r12 0xfffffd800267ac00 r13 0 r14 0xffffffff822fe490 w_lodata+0x4ec30 r15 0xffffffff82303b30 w_lodata+0x542d0 rip 0xffffffff81e3a658 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020be1750 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor0169) pid=342021 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b618c0,0xffff800020b28a08 process=0xffff800020b7d880 user=0xffff800020bdc000, vmspace=0xfffffd807effd8a0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 81008 82046 96471 0 7 0 syz-executor0169 81008 69170 96471 0 2 0x4000000 syz-executor0169 43928 2261 3641 0 3 0x80 nanosleep syz-executor0169 43928 268085 3641 0 3 0x4000080 fsleep syz-executor0169 43928 265857 3641 0 3 0x4000080 fsleep syz-executor0169 *43928 342021 3641 0 7 0x4000000 syz-executor0169 96471 261132 14729 0 3 0x80 nanosleep syz-executor0169 3641 473323 14729 0 3 0x80 nanosleep syz-executor0169 14729 187301 36509 0 3 0x82 nanosleep syz-executor0169 36509 129435 78283 0 3 0x10008a pause ksh 78283 370707 9578 0 3 0x92 select sshd 41635 96045 1 0 3 0x100083 ttyin getty 9578 4989 1 0 3 0x80 select sshd 55481 311226 90345 74 3 0x100092 bpf pflogd 90345 121153 1 0 3 0x80 netio pflogd 2572 163714 51853 73 3 0x100090 kqread syslogd 51853 204266 1 0 3 0x100082 netio syslogd 90373 304658 1 77 3 0x100090 poll dhclient 60751 429965 1 0 3 0x80 poll dhclient 77541 325038 0 0 3 0x14200 pgzero zerothread 56350 22830 0 0 3 0x14200 aiodoned aiodoned 13133 57463 0 0 3 0x14200 syncer update 76653 471411 0 0 3 0x14200 cleaner cleaner 11474 479753 0 0 3 0x14200 reaper reaper 79086 352619 0 0 3 0x14200 pgdaemon pagedaemon 25198 361860 0 0 3 0x14200 bored crynlk 87097 189584 0 0 3 0x14200 bored crypto 88125 123357 0 0 3 0x40014200 acpi0 acpi0 2890 263499 0 0 3 0x40014200 idle1 34870 120230 0 0 3 0x14200 bored softnet 60104 291797 0 0 3 0x14200 bored systqmp 59685 287726 0 0 3 0x14200 bored systq 9279 511458 0 0 3 0x40014200 bored softclock 93853 427659 0 0 3 0x40014200 idle0 22521 407886 0 0 3 0x14200 bored smr 1 449830 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 43928 (syz-executor0169) thread 0xffff800020b28c70 (342021) exclusive rrwlock inode r = 0 (0xfffffd806d8bc5f8) #0 witness_lock+0x52e #1 rw_enter+0x46d #2 rrw_enter+0x4f #3 VOP_LOCK+0x4b #4 vn_lock+0x6e #5 spec_open+0x431 #6 VOP_OPEN+0x6a #7 vn_open+0x495 #8 doopenat+0x28e #9 syscall+0x552 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82363690) #0 witness_lock+0x52e #1 __mp_acquire_count+0x51 #2 mi_switch+0x38f #3 sleep_finish+0x113 #4 rw_enter+0x366 #5 rrw_enter+0x4f #6 VOP_LOCK+0x4b #7 vn_lock+0x6e #8 spec_open+0x431 #9 VOP_OPEN+0x6a #10 vn_open+0x495 #11 doopenat+0x28e #12 syscall+0x552 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9454 6383K 6384K 78643K 10541 0 0 pcb 13 8K 8K 78643K 13 0 0 rtable 61 2K 2K 78643K 125 0 0 ifaddr 25 7K 7K 78643K 26 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1467 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1181 74K 74K 78643K 1462 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 2 0K 0K 78643K 2 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 3 4K 5K 78643K 1048 0 0 proc 52 50K 58K 78643K 334 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 11 0K 0K 78643K 11 0 0 ether_multi 1 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 30 132K 132K 78643K 30 0 0 exec 0 0K 1K 78643K 179 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 70 3K 3K 78643K 1885 0 0 UVM aobj 2 2K 2K 78643K 2 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 4 0K 0K 78643K 4 0 0 temp 39 2728K 2792K 78643K 1993 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 2 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 15 0 13 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 120 29 0 19 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 280 29 0 23 1 0 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 8 0 6 2 1 1 1 0 8 0 pfstkey 112 8 0 6 2 1 1 1 0 8 0 pfstate 328 8 0 6 2 1 1 1 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1859 0 476 45 0 45 45 0 8 0 ffsino 272 1859 0 476 93 0 93 93 0 8 0 nchpl 144 1984 0 443 58 0 58 58 0 8 0 uvmvnodes 72 1869 0 0 34 0 34 34 0 8 0 vnodes 200 1869 0 0 99 0 99 99 0 8 0 namei 1024 6083 0 6083 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 3070 0 3070 32 31 1 6 0 8 1 plimitpl 152 14 0 8 1 0 1 1 0 8 0 sigapl 432 556 0 540 2 0 2 2 0 8 0 futexpl 56 1214 0 1212 1 0 1 1 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 104 1 0 0 1 0 1 1 0 8 0 pipepl 112 134 0 127 2 1 1 1 0 8 0 fdescpl 488 557 0 540 3 0 3 3 0 8 0 filepl 152 2377 0 2325 3 0 3 3 0 8 0 lockfpl 104 6 0 6 1 1 0 1 0 8 0 lockfspl 48 3 0 3 1 1 0 1 0 8 0 sessionpl 112 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 1099 0 1090 1 0 1 1 0 8 0 zombiepl 144 540 0 540 2 1 1 1 0 8 1 processpl 896 572 0 540 4 0 4 4 0 8 0 procpl 632 941 0 905 4 0 4 4 0 8 0 sockpl 384 73 0 55 2 0 2 2 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 88 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 101 0 0 6 0 6 6 0 8 0 bufpl 256 2175 0 276 119 0 119 119 0 8 0 anonpl 16 34263 0 32906 7 1 6 7 0 125 0 amapchunkpl 152 1626 0 1577 3 0 3 3 0 158 0 amappl16 192 435 0 428 1 0 1 1 0 8 0 amappl14 176 38 0 34 1 0 1 1 0 8 0 amappl12 160 4 0 4 1 1 0 1 0 8 0 amappl11 152 46 0 31 1 0 1 1 0 8 0 amappl10 144 60 0 57 1 0 1 1 0 8 0 amappl9 136 435 0 434 1 0 1 1 0 8 0 amappl8 128 451 0 442 1 0 1 1 0 8 0 amappl7 120 19 0 17 1 0 1 1 0 8 0 amappl6 112 45 0 41 1 0 1 1 0 8 0 amappl5 104 125 0 112 1 0 1 1 0 8 0 amappl4 96 475 0 447 1 0 1 1 0 8 0 amappl3 88 155 0 144 1 0 1 1 0 8 0 amappl2 80 3975 0 3902 2 0 2 2 0 8 0 amappl1 72 19519 0 19058 16 6 10 16 0 8 0 amappl 80 1141 0 1112 1 0 1 1 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 557 0 540 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 557 0 540 1 0 1 1 0 8 0 vmmpekpl 168 7052 0 7031 2 0 2 2 0 8 0 vmmpepl 168 51294 0 50300 57 13 44 52 0 357 0 vmsppl 368 556 0 540 2 0 2 2 0 8 0 pdppl 4096 1122 0 1080 6 0 6 6 0 8 0 pvpl 32 110653 0 107446 28 0 28 28 0 265 0 pmappl 232 556 0 540 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 254 0 4 8 0 8 8 0 8 0