kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Sat Jul 11 07:19:37 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-6.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.15.208' (ECDSA) to the list of known hosts. 2020/07/11 07:20:05 parsed 1 programs 2020/07/11 07:20:09 executed programs: 0 login: panic: pool_do_get: mbufpl free list modified: page 0xfffffd806d6b3000; item addr 0xfffffd806d6b3c00; offset 0x0=0x0 != 0x7601539bc3f25fdd Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *347202 80737 74 0x100012 0 0K pflogd db_enter() at db_enter+0x18 panic(ffffffff8248e6c7) at panic+0x15c pool_do_get(ffffffff828cc7f8,2,ffff800020e45ef8) at pool_do_get+0x439 pool_get(ffffffff828cc7f8,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eade968,fffffd806eade9f0,ffffffff8271ed78,fffffd806d6b3b00,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eade7d8,9,fffffd806d6b3b00,0,0,ffff800020e3f9d0) at uipc_usrreq+0xbb9 sosend(fffffd806eade7d8,0,ffff800020e461e0,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e3f9d0,7f7fffff2270,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e3f9d0,ffff800020e46370,ffff800020e463c0) at sys_sendsyslog+0x13e syscall(ffff800020e46440) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff47f0, count: 3 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic pool_do_get: mbufpl free list modified: page 0xfffffd806d6b3000; item addr 0xfffffd806d6b3c00; offset 0x0=0x0 != 0x7601539bc3f25fdd ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff8248e6c7) at panic+0x15c pool_do_get(ffffffff828cc7f8,2,ffff800020e45ef8) at pool_do_get+0x439 pool_get(ffffffff828cc7f8,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eade968,fffffd806eade9f0,ffffffff8271ed78,fffffd806d6b3b00,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eade7d8,9,fffffd806d6b3b00,0,0,ffff800020e3f9d0) at uipc_usrreq+0xbb9 sosend(fffffd806eade7d8,0,ffff800020e461e0,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e3f9d0,7f7fffff2270,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e3f9d0,ffff800020e46370,ffff800020e463c0) at sys_sendsyslog+0x13e syscall(ffff800020e46440) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff47f0, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e45d40 rbx 0xffff800020e45df0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81ef3d3f kprintf+0x16f r9 0x1 r10 0x2 r11 0x92cf1551905dc225 r12 0x3000000008 r13 0xffff800020e45d50 r14 0x100 r15 0x1 rip 0xffffffff819b0b48 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e45d30 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (pflogd) pid=347202 stat=onproc flags process=100012 proc=0 pri=26, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e3fc40,0xffff800020e3fec0 process=0xffff8000fffffb38 user=0xffff800020e41000, vmspace=0xfffffd806e8f3178 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 30428 40220 20446 0 3 0x82 nanosleep syz-executor.0 20446 506511 45142 0 3 0x82 kqread syz-execprog 20446 404682 45142 0 3 0x4000082 nanosleep syz-execprog 20446 499679 45142 0 3 0x4000082 thrsleep syz-execprog 20446 385826 45142 0 3 0x4000082 thrsleep syz-execprog 20446 380802 45142 0 3 0x4000082 thrsleep syz-execprog 20446 289770 45142 0 3 0x4000082 thrsleep syz-execprog 20446 340593 45142 0 3 0x4000082 thrsleep syz-execprog 20446 415633 45142 0 3 0x4000082 thrsleep syz-execprog 20446 415461 45142 0 3 0x4000082 thrsleep syz-execprog 45142 335835 94435 0 3 0x10008a pause ksh 94435 458180 89248 0 3 0x92 select sshd 18155 221684 1 0 3 0x100083 ttyin getty 89248 88475 1 0 3 0x80 select sshd *80737 347202 13790 74 7 0x100012 pflogd 13790 214407 1 0 3 0x80 netio pflogd 27684 28125 87428 73 3 0x100090 kqread syslogd 87428 468749 1 0 3 0x100082 netio syslogd 92553 505040 1 77 3 0x100090 poll dhclient 23024 517360 1 0 3 0x80 poll dhclient 28005 109975 0 0 3 0x14200 bored smr 29919 389970 0 0 3 0x14200 pgzero zerothread 94057 484881 0 0 3 0x14200 aiodoned aiodoned 94961 389319 0 0 3 0x14200 syncer update 3022 392673 0 0 3 0x14200 cleaner cleaner 66313 82802 0 0 3 0x14200 reaper reaper 11624 52881 0 0 3 0x14200 pgdaemon pagedaemon 16186 22918 0 0 3 0x14200 bored crynlk 82695 219670 0 0 3 0x14200 bored crypto 83670 224981 0 0 3 0x40014200 acpi0 acpi0 61118 231698 0 0 7 0x40014200 idle1 84933 69501 0 0 3 0x14200 bored softnet 63764 2851 0 0 3 0x14200 bored systqmp 95351 14144 0 0 3 0x14200 bored systq 78092 357505 0 0 3 0x40014200 bored softclock 46562 343493 0 0 3 0x40014200 idle0 1 154782 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex mbufpl r = 0 (0xffffffff828cc808) #0 witness_lock+0x4c7 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b #3 pool_get+0xbf #4 m_get+0x4c #5 sbappendaddr+0x2e9 #6 uipc_usrreq+0xbb9 #7 sosend+0x671 #8 dosendsyslog+0x2b8 #9 sys_sendsyslog+0x13e #10 syscall+0x4a4 #11 Xsyscall+0x128 Process 80737 (pflogd) thread 0xffff800020e3f9d0 (347202) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828b6580) #0 witness_lock+0x4c7 #1 syscall+0x400 #2 Xsyscall+0x128 exclusive mutex mbufpl r = 0 (0xffffffff828cc808) #0 witness_lock+0x4c7 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b #3 pool_get+0xbf #4 m_get+0x4c #5 sbappendaddr+0x2e9 #6 uipc_usrreq+0xbb9 #7 sosend+0x671 #8 dosendsyslog+0x2b8 #9 sys_sendsyslog+0x13e #10 syscall+0x4a4 #11 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9467 6396K 6396K 78643K 10560 0 pcb 13 8K 8K 78643K 13 0 rtable 83 2K 2K 78643K 163 0 ifaddr 37 9K 9K 78643K 39 0 counters 41 33K 33K 78643K 41 0 ioctlops 0 0K 4K 78643K 1468 0 mount 1 1K 1K 78643K 1 0 vnodes 1183 74K 75K 78643K 1188 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 2 4K 12K 78643K 18 0 proc 59 63K 83K 78643K 398 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 22 1K 1K 78643K 22 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 19 95K 95K 78643K 19 0 exec 0 0K 1K 78643K 197 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 73 12K 12K 78643K 946 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 7 0K 0K 78643K 7 0 temp 29 3853K 3917K 78643K 1870 0 kqueue 3 4K 4K 78643K 3 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 4 0 0 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 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 296 34 0 28 1 0 1 1 0 8 0 nd6 48 3 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 1 1 0 1 1 0 8 0 pfstkey 112 10 0 1 1 0 1 1 0 8 0 pfstate 328 10 0 1 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 256 145 0 0 10 0 10 10 0 8 0 art_table 32 146 0 0 2 0 2 2 0 8 0 art_node 16 33 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1424 0 22 88 0 88 88 0 8 0 ffsino 272 1424 0 22 94 0 94 94 0 8 0 nchpl 144 1643 0 38 60 0 60 60 0 8 0 uvmvnodes 72 1434 0 0 27 0 27 27 0 8 0 vnodes 208 1434 0 0 76 0 76 76 0 8 0 namei 1024 4230 0 4230 2 1 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 4599 0 4599 8 3 5 7 0 8 5 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 241 0 212 4 0 4 4 0 8 0 knotepl 112 47 0 36 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipepl 304 77 0 70 3 2 1 1 0 8 0 fdescpl 496 226 0 212 3 0 3 3 0 8 0 filepl 152 1116 0 1058 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 62 0 53 1 0 1 1 0 8 0 zombiepl 144 212 0 211 3 2 1 1 0 8 0 processpl 992 241 0 211 5 0 5 5 0 8 1 procpl 624 249 0 211 4 0 4 4 0 8 1 sockpl 400 80 0 62 2 0 2 2 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 77 0 0 10 0 10 10 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 104 0 0 6 0 6 6 0 8 0 mbufpl: pool(0xffffffff828cc7f8:mbufpl): free list modified: page 0xfffffd806d6b3000; item ordinal 0; addr 0xfffffd806d6b3c00 (p 0xfffffd806db24000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd806d6b3000; item ordinal 0; addr 0xfffffd806d6b3c00 (p 0xfffffd806db24000); offset 0x0=0x0 mbufpl: pool(0xffffffff828cc7f8:mbufpl): page inconsistency: page 0xfffffd806d6b3000; item ordinal 1; addr 0x3cea8e68305a2cbd bufpl 280 3049 0 133 209 0 209 209 0 8 0 anonpl 16 22346 0 20721 15 3 12 12 0 124 4 amapchunkpl 152 835 0 769 4 0 4 4 0 158 0 amappl16 192 134 0 107 2 0 2 2 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 29 0 25 1 0 1 1 0 8 0 amappl13 168 25 0 21 3 2 1 1 0 8 0 amappl12 160 7 0 5 2 1 1 1 0 8 0 amappl11 152 68 0 52 1 0 1 1 0 8 0 amappl10 144 17 0 13 1 0 1 1 0 8 0 amappl9 136 234 0 232 1 0 1 1 0 8 0 amappl8 128 274 0 263 1 0 1 1 0 8 0 amappl7 120 112 0 102 1 0 1 1 0 8 0 amappl6 112 22 0 21 3 2 1 1 0 8 0 amappl5 104 130 0 116 1 0 1 1 0 8 0 amappl4 96 494 0 466 1 0 1 1 0 8 0 amappl3 88 105 0 100 1 0 1 1 0 8 0 amappl2 80 904 0 845 4 2 2 2 0 8 0 amappl1 72 15316 0 14900 23 5 18 18 0 8 8 amappl 80 474 0 446 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 226 0 212 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 226 0 212 1 0 1 1 0 8 0 vmmpekpl 168 6414 0 6387 2 0 2 2 0 8 0 vmmpepl 168 33019 0 32100 84 11 73 73 0 357 31 vmsppl 368 225 0 212 2 0 2 2 0 8 0 pdppl 4096 459 0 424 6 0 6 6 0 8 1 pvpl 32 113691 0 109711 110 6 104 104 0 265 70 pmappl 232 225 0 212 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 234 0 4 7 0 7 7 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff8248e6c7) at panic+0x15c pool_do_get(ffffffff828cc7f8,2,ffff800020e45ef8) at pool_do_get+0x439 pool_get(ffffffff828cc7f8,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eade968,fffffd806eade9f0,ffffffff8271ed78,fffffd806d6b3b00,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eade7d8,9,fffffd806d6b3b00,0,0,ffff800020e3f9d0) at uipc_usrreq+0xbb9 sosend(fffffd806eade7d8,0,ffff800020e461e0,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e3f9d0,7f7fffff2270,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e3f9d0,ffff800020e46370,ffff800020e463c0) at sys_sendsyslog+0x13e syscall(ffff800020e46440) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff47f0, count: -12 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffff800020d70ff0) at sched_idle+0x3f7 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffff800020d70ff0) at sched_idle+0x3f7 end trace frame: 0x0, count: -5 ddb{1}>