kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Wed Oct 23 04:53:14 PDT 2019 OpenBSD/amd64 (ci-openbsd-multicore-3.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.10.22' (ECDSA) to the list of known hosts. 2019/10/23 04:54:12 parsed 1 programs 2019/10/23 04:54:16 executed programs: 0 login: panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f210200+16 0x0!=0x2f67ccf3599c757c Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *486970 81678 74 0x100012 0 1K pflogd 379204 40418 73 0x100010 0x80 0 syslogd db_enter() at db_enter+0x18 panic() at panic+0x15c pool_cache_get(ffffffff826411d0) at pool_cache_get+0x323 pool_get() at pool_get+0x91 m_gethdr(1,1) at m_gethdr+0x4c m_getuio(ffff800020aaaef8,1,100000,ffff800020aaafe0) at m_getuio+0xe4 sosend(fffffd806e984a88,0,ffff800020aaafe0,0,0,0) at sosend+0x510 dosendsyslog(ffff800020ac0288,7f7ffffcfcc0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog() at sys_sendsyslog+0x13e syscall(ffff800020aab240) at syscall+0x4a4 Xsyscall(6,70,3d,70,1fee,1297f6d86038) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2240, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f210200+16 0x0!=0x2f67ccf3599c757c ddb{1}> trace db_enter() at db_enter+0x18 panic() at panic+0x15c pool_cache_get(ffffffff826411d0) at pool_cache_get+0x323 pool_get() at pool_get+0x91 m_gethdr(1,1) at m_gethdr+0x4c m_getuio(ffff800020aaaef8,1,100000,ffff800020aaafe0) at m_getuio+0xe4 sosend(fffffd806e984a88,0,ffff800020aaafe0,0,0,0) at sosend+0x510 dosendsyslog(ffff800020ac0288,7f7ffffcfcc0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog() at sys_sendsyslog+0x13e syscall(ffff800020aab240) at syscall+0x4a4 Xsyscall(6,70,3d,70,1fee,1297f6d86038) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2240, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020aaac30 rbx 0xffff800020aaace0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8199ba8f kprintf+0x16f r9 0x1 r10 0x4ec635e45dd00746 r11 0x4a84937c0288bb34 r12 0x3000000008 r13 0xffff800020aaac40 r14 0x100 r15 0x1 rip 0xffffffff81c952f8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020aaac20 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (pflogd) pid=486970 stat=onproc flags process=100012 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020ac1158,0xffff800020ac13e0 process=0xffff800020add180 user=0xffff800020aa6000, vmspace=0xfffffd806e7e2a18 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1645 490789 86785 0 3 0x82 nanosleep syz-executor.0 86785 265574 99851 0 3 0x82 thrsleep syz-execprog 86785 237337 99851 0 3 0x4000082 nanosleep syz-execprog 86785 394839 99851 0 3 0x4000082 thrsleep syz-execprog 86785 273816 99851 0 3 0x4000082 thrsleep syz-execprog 86785 513932 99851 0 3 0x4000082 thrsleep syz-execprog 86785 340034 99851 0 3 0x4000082 nanosleep syz-execprog 86785 101458 99851 0 3 0x4000082 thrsleep syz-execprog 86785 442519 99851 0 3 0x4000082 thrsleep syz-execprog 86785 93517 99851 0 3 0x4000082 kqread syz-execprog 99851 472394 70352 0 3 0x10008a pause ksh 70352 81647 95867 0 3 0x92 select sshd 78761 338160 1 0 3 0x100083 ttyin getty 95867 310565 1 0 3 0x80 select sshd *81678 486970 46386 74 7 0x100012 pflogd 46386 99604 1 0 3 0x80 netio pflogd 40418 379204 74497 73 7 0x100090 syslogd 74497 393790 1 0 3 0x100082 netio syslogd 67909 454877 1 77 3 0x100090 poll dhclient 50120 372336 1 0 3 0x80 poll dhclient 52253 322543 0 0 3 0x14200 pgzero zerothread 62281 366202 0 0 3 0x14200 aiodoned aiodoned 30627 408835 0 0 3 0x14200 syncer update 16797 328569 0 0 3 0x14200 cleaner cleaner 33416 255592 0 0 3 0x14200 reaper reaper 90857 491394 0 0 3 0x14200 pgdaemon pagedaemon 78569 52461 0 0 3 0x14200 bored crynlk 13960 216779 0 0 3 0x14200 bored crypto 36140 234997 0 0 3 0x40014200 acpi0 acpi0 74881 275961 0 0 3 0x40014200 idle1 52620 502293 0 0 3 0x14200 bored softnet 33037 118286 0 0 3 0x14200 bored systqmp 69239 197798 0 0 3 0x14200 bored systq 75125 24093 0 0 3 0x40014200 bored softclock 20434 245161 0 0 3 0x40014200 idle0 26708 278998 0 0 3 0x14200 bored smr 1 66475 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 81678 (pflogd) thread 0xffff800020ac0288 (486970) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82668f60) #0 witness_lock+0x52e #1 syscall+0x400 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9457 6385K 6385K 78643K 10544 0 0 pcb 13 8K 8K 78643K 13 0 0 rtable 77 2K 2K 78643K 165 0 0 ifaddr 32 9K 9K 78643K 50 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1468 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1181 74K 74K 78643K 1186 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 2 4K 12K 78643K 35 0 0 proc 59 63K 83K 78643K 384 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 22 1K 1K 78643K 22 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 18 79K 79K 78643K 18 0 0 exec 0 0K 1K 78643K 199 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 75 12K 12K 78643K 976 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 7 0K 0K 78643K 7 0 0 temp 48 3546K 3610K 78643K 3371 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 4 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 17 0 15 1 0 1 1 0 8 0 rtentry 112 34 0 4 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 51 0 45 1 0 1 1 0 8 0 nd6 48 2 0 0 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 10 0 2 1 0 1 1 0 8 0 pfstkey 112 10 0 2 1 0 1 1 0 8 0 pfstate 328 10 0 2 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 256 168 0 2 11 0 11 11 0 8 0 art_table 32 169 0 2 2 0 2 2 0 8 0 art_node 16 33 0 6 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1439 0 37 46 0 46 46 0 8 0 ffsino 272 1439 0 37 94 0 94 94 0 8 0 nchpl 144 1695 0 84 60 0 60 60 0 8 0 uvmvnodes 72 1449 0 0 27 0 27 27 0 8 0 vnodes 208 1449 0 0 77 0 77 77 0 8 0 namei 1024 4210 0 4210 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 4329 0 4329 10 9 1 7 0 8 1 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 432 243 0 230 2 0 2 2 0 8 0 knotepl 112 39 0 28 1 0 1 1 0 8 0 kqueuepl 104 2 0 0 1 0 1 1 0 8 0 pipepl 112 154 0 141 2 1 1 1 0 8 0 fdescpl 488 244 0 230 3 0 3 3 0 8 0 filepl 152 1155 0 1097 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 19 0 9 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 52 0 43 1 0 1 1 0 8 0 zombiepl 144 230 0 229 2 1 1 1 0 8 0 processpl 896 259 0 229 4 0 4 4 0 8 0 procpl 632 267 0 229 4 0 4 4 0 8 0 sockpl 384 97 0 79 2 0 2 2 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 99 0 0 6 0 6 6 0 8 0 bufpl 256 5904 0 1315 287 0 287 287 0 8 0 anonpl 16 22703 0 21040 14 1 13 13 0 124 6 amapchunkpl 152 826 0 761 5 0 5 5 0 158 1 amappl16 192 203 0 166 3 0 3 3 0 8 1 amappl15 184 37 0 35 1 0 1 1 0 8 0 amappl14 176 27 0 24 2 1 1 1 0 8 0 amappl12 160 5 0 4 2 1 1 1 0 8 0 amappl11 152 57 0 41 1 0 1 1 0 8 0 amappl10 144 15 0 12 1 0 1 1 0 8 0 amappl9 136 462 0 456 1 0 1 1 0 8 0 amappl8 128 130 0 119 1 0 1 1 0 8 0 amappl7 120 36 0 32 1 0 1 1 0 8 0 amappl6 112 79 0 69 1 0 1 1 0 8 0 amappl5 104 123 0 109 1 0 1 1 0 8 0 amappl4 96 513 0 484 1 0 1 1 0 8 0 amappl3 88 114 0 109 1 0 1 1 0 8 0 amappl2 80 999 0 938 3 0 3 3 0 8 1 amappl1 72 15197 0 14784 26 8 18 20 0 8 8 amappl 80 494 0 466 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 17 0 17 1 1 0 1 0 8 0 aobjpl 64 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 244 0 230 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 244 0 230 1 0 1 1 0 8 0 vmmpekpl 168 6439 0 6415 3 1 2 2 0 8 0 vmmpepl 168 33213 0 32290 93 13 80 80 0 357 38 vmsppl 368 243 0 230 2 0 2 2 0 8 0 pdppl 4096 495 0 460 6 0 6 6 0 8 1 pvpl 32 114159 0 110114 115 0 115 115 0 265 81 pmappl 232 243 0 230 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 425 0 4 13 0 13 13 0 8 0