kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Sat May 9 15:29:06 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-4.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.165' (ECDSA) to the list of known hosts. 2020/05/09 15:29:27 parsed 1 programs 2020/05/09 15:29:31 executed programs: 0 login: panic: pool_do_get: mbufpl free list modified: page 0xfffffd806e5e0000; item addr 0xfffffd806e5e0500; offset 0x0=0x0 != 0x753609bc00534970 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *499632 60337 74 0x100012 0 1K pflogd db_enter() at db_enter+0x18 panic(ffffffff822735eb) at panic+0x15c pool_do_get(ffffffff8268b9a0,2,ffff800020ef39b8) at pool_do_get+0x439 pool_get(ffffffff8268b9a0,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eb327d8,fffffd806eb32860,ffffffff824fa638,fffffd806e5e0400,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eb32648,9,fffffd806e5e0400,0,0,ffff800020ed0010) at uipc_usrreq+0xbb9 sosend(fffffd806eb32648,0,ffff800020ef3ca0,0,0,0) at sosend+0x671 dosendsyslog(ffff800020ed0010,7f7ffffe38c0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020ed0010,ffff800020ef3e30,ffff800020ef3e80) at sys_sendsyslog+0x13e syscall(ffff800020ef3f00) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5e40, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic pool_do_get: mbufpl free list modified: page 0xfffffd806e5e0000; item addr 0xfffffd806e5e0500; offset 0x0=0x0 != 0x753609bc00534970 ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff822735eb) at panic+0x15c pool_do_get(ffffffff8268b9a0,2,ffff800020ef39b8) at pool_do_get+0x439 pool_get(ffffffff8268b9a0,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eb327d8,fffffd806eb32860,ffffffff824fa638,fffffd806e5e0400,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eb32648,9,fffffd806e5e0400,0,0,ffff800020ed0010) at uipc_usrreq+0xbb9 sosend(fffffd806eb32648,0,ffff800020ef3ca0,0,0,0) at sosend+0x671 dosendsyslog(ffff800020ed0010,7f7ffffe38c0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020ed0010,ffff800020ef3e30,ffff800020ef3e80) at sys_sendsyslog+0x13e syscall(ffff800020ef3f00) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5e40, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020ef3800 rbx 0xffff800020ef38b0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff814db7df kprintf+0x16f r9 0x1 r10 0xf7222849f2352811 r11 0xce8cef84860c9da9 r12 0x3000000008 r13 0xffff800020ef3810 r14 0x100 r15 0x1 rip 0xffffffff817e1ae8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020ef37f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (pflogd) pid=499632 stat=onproc flags process=100012 proc=0 pri=26, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed04f0,0xffff800020ed0770 process=0xffff800020ec9b00 user=0xffff800020eee000, vmspace=0xfffffd806e9572e8 estcpu=0, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 94953 323814 65943 0 3 0x82 nanosleep syz-executor.0 65943 303447 87598 0 3 0x82 thrsleep syz-execprog 65943 27773 87598 0 3 0x4000082 nanosleep syz-execprog 65943 307794 87598 0 3 0x4000082 thrsleep syz-execprog 65943 104847 87598 0 3 0x4000082 thrsleep syz-execprog 65943 398117 87598 0 3 0x4000082 thrsleep syz-execprog 65943 319628 87598 0 3 0x4000082 thrsleep syz-execprog 65943 429106 87598 0 3 0x4000082 kqread syz-execprog 65943 327649 87598 0 3 0x4000082 thrsleep syz-execprog 65943 156481 87598 0 3 0x4000082 nanosleep syz-execprog 87598 238293 80584 0 3 0x10008a pause ksh 80584 149440 85940 0 3 0x92 select sshd 65521 498247 1 0 3 0x100083 ttyin getty 85940 519574 1 0 3 0x80 select sshd *60337 499632 97154 74 7 0x100012 pflogd 97154 488890 1 0 3 0x80 netio pflogd 41045 180792 49018 73 3 0x100090 kqread syslogd 49018 141676 1 0 3 0x100082 netio syslogd 61363 423555 1 77 3 0x100090 poll dhclient 8896 172170 1 0 3 0x80 poll dhclient 78098 506195 0 0 3 0x14200 bored smr 67302 264572 0 0 3 0x14200 pgzero zerothread 69509 448011 0 0 3 0x14200 aiodoned aiodoned 52670 356721 0 0 3 0x14200 syncer update 20808 176215 0 0 3 0x14200 cleaner cleaner 21041 360112 0 0 3 0x14200 reaper reaper 28903 68269 0 0 3 0x14200 pgdaemon pagedaemon 55957 395557 0 0 3 0x14200 bored crynlk 83958 330796 0 0 3 0x14200 bored crypto 63141 253977 0 0 3 0x40014200 acpi0 acpi0 84588 260766 0 0 3 0x40014200 idle1 77960 256183 0 0 3 0x14200 bored softnet 84688 350112 0 0 3 0x14200 bored systqmp 48981 204694 0 0 3 0x14200 bored systq 75164 127934 0 0 3 0x40014200 bored softclock 25990 60432 0 0 7 0x40014200 idle0 1 485539 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex mbufpl r = 0 (0xffffffff8268b9b0) #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 60337 (pflogd) thread 0xffff800020ed0010 (499632) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82693100) #0 witness_lock+0x4c7 #1 syscall+0x400 #2 Xsyscall+0x128 exclusive mutex mbufpl r = 0 (0xffffffff8268b9b0) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9466 6395K 6395K 78643K 10557 0 pcb 13 8K 8K 78643K 13 0 rtable 83 2K 2K 78643K 163 0 ifaddr 37 9K 9K 78643K 78 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 1823 197K 290K 78643K 12980 0 file desc 2 4K 12K 78643K 57 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 76 12K 12K 78643K 991 0 UVM aobj 2 2K 2K 78643K 2 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 3033K 3097K 78643K 1944 0 kqueue 3 4K 4K 78643K 3 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 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 280 73 0 67 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 11 0 0 1 0 1 1 0 8 0 pfstkey 112 11 0 0 1 0 1 1 0 8 0 pfstate 328 11 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 256 144 0 0 9 0 9 9 0 8 0 art_table 32 145 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 1463 0 61 88 0 88 88 0 8 0 ffsino 272 1463 0 61 94 0 94 94 0 8 0 nchpl 144 1718 0 117 60 0 60 60 0 8 0 uvmvnodes 72 1473 0 0 27 0 27 27 0 8 0 vnodes 208 1473 0 0 78 0 78 78 0 8 0 namei 1024 4360 0 4360 2 1 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 4060 0 4060 2 1 1 2 0 8 1 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 280 0 251 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 pipelkpl 48 77 0 70 2 1 1 1 0 8 0 pipepl 120 154 0 141 2 1 1 1 0 8 0 fdescpl 496 265 0 251 3 0 3 3 0 8 0 filepl 152 1187 0 1129 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 144 251 0 250 2 1 1 1 0 8 0 processpl 984 280 0 250 5 0 5 5 0 8 1 procpl 624 288 0 250 4 0 4 4 0 8 1 sockpl 400 119 0 101 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 72 0 0 9 0 9 9 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 95 0 0 6 0 6 6 0 8 0 mbufpl: pool(0xffffffff8268b9a0:mbufpl): free list modified: page 0xfffffd806e5e0000; item ordinal 0; addr 0xfffffd806e5e0500 (p 0xfffffd806dc4e000); offset 0x0=0x0 mbufpl: pool(0xffffffff8268b9a0:mbufpl): page inconsistency: page 0xfffffd806e5e0000; item ordinal 1; addr 0xe6f15f3b6f64807f bufpl 280 3020 0 132 207 0 207 207 0 8 0 anonpl 16 23504 0 21561 14 2 12 12 0 124 4 amapchunkpl 152 841 0 776 4 0 4 4 0 158 0 amappl16 192 320 0 266 3 0 3 3 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 32 0 27 1 0 1 1 0 8 0 amappl13 168 21 0 19 2 1 1 1 0 8 0 amappl12 160 11 0 8 2 1 1 1 0 8 0 amappl11 152 52 0 37 1 0 1 1 0 8 0 amappl10 144 61 0 56 1 0 1 1 0 8 0 amappl9 136 231 0 229 1 0 1 1 0 8 0 amappl8 128 272 0 264 1 0 1 1 0 8 0 amappl7 120 156 0 143 1 0 1 1 0 8 0 amappl6 112 24 0 22 2 1 1 1 0 8 0 amappl5 104 170 0 154 1 0 1 1 0 8 0 amappl4 96 497 0 470 1 0 1 1 0 8 0 amappl3 88 108 0 101 1 0 1 1 0 8 0 amappl2 80 957 0 900 3 1 2 2 0 8 0 amappl1 72 15688 0 15271 24 6 18 18 0 8 8 amappl 80 516 0 488 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 265 0 251 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 265 0 251 1 0 1 1 0 8 0 vmmpekpl 168 6422 0 6400 2 0 2 2 0 8 0 vmmpepl 168 34466 0 33518 84 12 72 72 0 357 29 vmsppl 368 264 0 251 2 0 2 2 0 8 0 pdppl 4096 538 0 502 6 0 6 6 0 8 0 pvpl 32 117836 0 113527 106 2 104 104 0 265 69 pmappl 232 264 0 251 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 232 0 4 7 0 7 7 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff824abff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffffffff824abff0) at sched_idle+0x3f7 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff824abff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffffffff824abff0) at sched_idle+0x3f7 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 panic(ffffffff822735eb) at panic+0x15c pool_do_get(ffffffff8268b9a0,2,ffff800020ef39b8) at pool_do_get+0x439 pool_get(ffffffff8268b9a0,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eb327d8,fffffd806eb32860,ffffffff824fa638,fffffd806e5e0400,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eb32648,9,fffffd806e5e0400,0,0,ffff800020ed0010) at uipc_usrreq+0xbb9 sosend(fffffd806eb32648,0,ffff800020ef3ca0,0,0,0) at sosend+0x671 dosendsyslog(ffff800020ed0010,7f7ffffe38c0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020ed0010,ffff800020ef3e30,ffff800020ef3e80) at sys_sendsyslog+0x13e syscall(ffff800020ef3f00) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5e40, count: 3 ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff822735eb) at panic+0x15c pool_do_get(ffffffff8268b9a0,2,ffff800020ef39b8) at pool_do_get+0x439 pool_get(ffffffff8268b9a0,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eb327d8,fffffd806eb32860,ffffffff824fa638,fffffd806e5e0400,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eb32648,9,fffffd806e5e0400,0,0,ffff800020ed0010) at uipc_usrreq+0xbb9 sosend(fffffd806eb32648,0,ffff800020ef3ca0,0,0,0) at sosend+0x671 dosendsyslog(ffff800020ed0010,7f7ffffe38c0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020ed0010,ffff800020ef3e30,ffff800020ef3e80) at sys_sendsyslog+0x13e syscall(ffff800020ef3f00) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5e40, count: -12 ddb{1}>