kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Thu Dec 5 15:33:08 PST 2019 OpenBSD/amd64 (ci-openbsd-multicore-1.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.15.203' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program login: panic: pool_do_get: aobjpl free list modified: page 0xfffffd807eca2000; item addr 0xfffffd807eca2d80; offset 0x14=0xdead410f Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 477596 14252 0 0 0 0 syz-executor5844 *221866 14252 0 0 0x4000000 1K syz-executor5844 db_enter() at db_enter+0x18 panic(ffffffff8220d3b4) at panic+0x15c pool_do_get(ffffffff82651ab8,1,ffff800020b3fa18) at pool_do_get+0x472 pool_get(ffffffff82651ab8,1) at pool_get+0xeb uao_create(1000,0) at uao_create+0x7c shmget_allocate_segment(ffff800020ac18c8,ffff800020b3fc08,100,ffff800020b3fc50) at shmget_allocate_segment+0x352 sys_shmget(ffff800020ac18c8,ffff800020b3fc08,ffff800020b3fc50) at sys_shmget+0x13f syscall(ffff800020b3fcd0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa984a216190, count: 6 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}> set $maxwidth = 0 ddb{1}> show panic pool_do_get: aobjpl free list modified: page 0xfffffd807eca2000; item addr 0xfffffd807eca2d80; offset 0x14=0xdead410f ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff8220d3b4) at panic+0x15c pool_do_get(ffffffff82651ab8,1,ffff800020b3fa18) at pool_do_get+0x472 pool_get(ffffffff82651ab8,1) at pool_get+0xeb uao_create(1000,0) at uao_create+0x7c shmget_allocate_segment(ffff800020ac18c8,ffff800020b3fc08,100,ffff800020b3fc50) at shmget_allocate_segment+0x352 sys_shmget(ffff800020ac18c8,ffff800020b3fc08,ffff800020b3fc50) at sys_shmget+0x13f syscall(ffff800020b3fcd0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa984a216190, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020b3f860 rbx 0xffff800020b3f910 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81cd657f kprintf+0x16f r9 0x1 r10 0x2fb1d95634206333 r11 0xca503300e927441c r12 0x3000000008 r13 0xffff800020b3f870 r14 0x100 r15 0x1 rip 0xffffffff813ee2e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020b3f850 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor5844) pid=221866 stat=onproc flags process=0 proc=4000000 pri=53, usrpri=53, nice=20 forw=0xffffffffffffffff, list=0xffff800020ac1160,0xffffffff82617120 process=0xffff800020aeca80 user=0xffff800020b3a000, vmspace=0xfffffd807f0085c0 estcpu=3, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 60170 227293 99918 0 3 0 vmmaplk syz-executor5844 60170 514709 99918 0 3 0x4000000 physio syz-executor5844 14252 477596 18168 0 7 0 syz-executor5844 14252 434676 18168 0 3 0x4000080 fsleep syz-executor5844 *14252 221866 18168 0 7 0x4000000 syz-executor5844 99918 470932 58792 0 3 0x80 nanosleep syz-executor5844 18168 129280 58792 0 3 0x80 nanosleep syz-executor5844 58792 487161 65099 0 3 0x82 nanosleep syz-executor5844 65099 153185 67304 0 3 0x10008a pause ksh 67304 67565 70790 0 3 0x92 select sshd 45212 336726 1 0 3 0x100083 ttyin getty 70790 68170 1 0 3 0x80 select sshd 95697 416915 32515 74 3 0x100092 bpf pflogd 32515 436230 1 0 3 0x80 netio pflogd 7748 29218 88533 73 3 0x100090 kqread syslogd 88533 317647 1 0 3 0x100082 netio syslogd 86144 163279 1 77 3 0x100090 poll dhclient 10979 169650 1 0 3 0x80 poll dhclient 63166 285434 0 0 3 0x14200 pgzero zerothread 22837 116142 0 0 3 0x14200 aiodoned aiodoned 24496 50017 0 0 3 0x14200 syncer update 29848 451514 0 0 3 0x14200 cleaner cleaner 33296 27751 0 0 3 0x14200 reaper reaper 25144 152077 0 0 3 0x14200 pgdaemon pagedaemon 82056 380704 0 0 3 0x14200 bored crynlk 761 520291 0 0 3 0x14200 bored crypto 76481 76250 0 0 3 0x40014200 acpi0 acpi0 43279 478589 0 0 3 0x40014200 idle1 96587 107872 0 0 3 0x14200 bored softnet 53106 92255 0 0 3 0x14200 bored systqmp 76870 210425 0 0 3 0x14200 bored systq 79587 381863 0 0 3 0x40014200 bored softclock 11708 198651 0 0 3 0x40014200 idle0 64363 239130 0 0 3 0x14200 bored smr 1 296155 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex aobjpl r = 0 (0xffffffff82651ac8) #0 witness_lock+0x52e #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b #3 pool_get+0xbf #4 uao_create+0x7c #5 shmget_allocate_segment+0x352 #6 sys_shmget+0x13f #7 syscall+0x4a4 #8 Xsyscall+0x128 Process 60170 (syz-executor5844) thread 0xffff800020ac1160 (514709) shared rwlock vmmaplk r = 0 (0xfffffd807f008d08) #0 witness_lock+0x52e #1 uvm_vslock_device+0x11e #2 physio+0x26a #3 spec_write+0xd4 #4 VOP_WRITE+0xc6 #5 vn_write+0x199 #6 dofilewritev+0x1b7 #7 sys_pwritev+0xb8 #8 syscall+0x4a4 #9 Xsyscall+0x128 Process 14252 (syz-executor5844) thread 0xffff800020ac18c8 (221866) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82651ec8) #0 witness_lock+0x52e #1 syscall+0x400 #2 Xsyscall+0x128 exclusive mutex aobjpl r = 0 (0xffffffff82651ac8) #0 witness_lock+0x52e #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b #3 pool_get+0xbf #4 uao_create+0x7c #5 shmget_allocate_segment+0x352 #6 sys_shmget+0x13f #7 syscall+0x4a4 #8 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9461 6393K 6394K 78643K 10552 0 pcb 13 8K 8K 78643K 13 0 rtable 61 2K 2K 78643K 127 0 ifaddr 29 8K 8K 78643K 30 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1467 0 mount 1 1K 1K 78643K 1 0 vnodes 1182 74K 74K 78643K 1192 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 1 0K 0K 78643K 1 0 proc 59 63K 71K 78643K 358 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 18 79K 79K 78643K 18 0 exec 0 0K 1K 78643K 177 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 77 4K 4K 78643K 847 0 UVM aobj 4 2K 2K 78643K 10 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 4 0K 0K 78643K 4 0 temp 27 3003K 3067K 78643K 1986 0 SYN cache 2 16K 16K 78643K 2 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 1 0 1 1 0 8 1 tcpcb 544 18 0 15 1 0 1 1 0 8 0 inpcb 280 39 0 33 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 9 0 0 1 0 1 1 0 8 0 pfstkey 112 9 0 0 1 0 1 1 0 8 0 pfstate 328 9 0 0 1 0 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 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 shmpl 112 9 0 7 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1421 0 31 45 0 45 45 0 8 0 ffsino 272 1421 0 31 93 0 93 93 0 8 0 nchpl 144 1603 0 52 58 0 58 58 0 8 0 uvmvnodes 72 1431 0 0 27 0 27 27 0 8 0 vnodes 208 1431 0 0 76 0 76 76 0 8 0 namei 1024 3826 0 3826 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 5115 0 5114 2 1 1 2 0 8 0 plimitpl 152 14 0 8 1 0 1 1 0 8 0 sigapl 432 212 0 196 2 0 2 2 0 8 0 futexpl 56 45 0 44 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 160 128 0 121 1 0 1 1 0 8 0 fdescpl 488 213 0 196 3 0 3 3 0 8 0 filepl 152 1020 0 968 3 0 3 3 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 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 52 0 43 1 0 1 1 0 8 0 zombiepl 144 196 0 196 1 0 1 1 0 8 1 processpl 896 228 0 196 4 0 4 4 0 8 0 procpl 632 243 0 208 4 0 4 4 0 8 0 sockpl 384 83 0 63 3 0 3 3 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 56 0 0 7 0 7 7 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 80 0 0 5 0 5 5 0 8 0 bufpl 280 2228 0 283 139 0 139 139 0 8 0 anonpl 16 43710 0 34558 40 1 39 39 0 125 2 amapchunkpl 152 635 0 573 4 0 4 4 0 158 0 amappl16 192 1482 0 1003 25 0 25 25 0 8 1 amappl15 184 50 0 46 1 0 1 1 0 8 0 amappl14 176 15 0 14 1 0 1 1 0 8 0 amappl12 160 2 0 2 1 0 1 1 0 8 1 amappl11 152 53 0 38 1 0 1 1 0 8 0 amappl10 144 7 0 5 1 0 1 1 0 8 0 amappl9 136 425 0 424 1 0 1 1 0 8 0 amappl8 128 75 0 68 1 0 1 1 0 8 0 amappl7 120 74 0 66 1 0 1 1 0 8 0 amappl6 112 46 0 44 1 0 1 1 0 8 0 amappl5 104 131 0 117 1 0 1 1 0 8 0 amappl4 96 468 0 440 1 0 1 1 0 8 0 amappl3 88 115 0 104 1 0 1 1 0 8 0 amappl2 80 886 0 808 2 0 2 2 0 8 0 amappl1 72 13883 0 13415 15 5 10 15 0 8 0 amappl 80 436 0 407 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 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 64 9 0 6 1 0 1 1 0 8 0 pool(0xffffffff82651ab8:aobjpl): page inconsistency: page 0xfffffd807eca2000; 58 on list, 3 missing, 62 items per page uaddrrnd 24 213 0 196 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 213 0 196 1 0 1 1 0 8 0 vmmpekpl 168 5404 0 5381 2 0 2 2 0 8 0 vmmpepl 168 37884 0 36361 74 6 68 68 0 357 1 vmsppl 368 212 0 196 2 0 2 2 0 8 0 pdppl 4096 433 0 392 6 0 6 6 0 8 0 pvpl 32 147576 0 136524 93 0 93 93 0 265 3 pmappl 232 212 0 196 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 131 0 3 4 0 4 4 0 8 0 ddb{1}>