kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Thu Jul 9 08:35:45 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-4.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.1.23' (ECDSA) to the list of known hosts. 2020/07/09 08:36:04 parsed 1 programs 2020/07/09 08:36:09 executed programs: 0 login: panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f301600+16 0x0!=0x51e1f03123956443 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *359908 16802 74 0x100012 0 0K pflogd 385676 37755 73 0x100010 0x80 1 syslogd db_enter() at db_enter+0x18 panic(ffffffff824016e3) at panic+0x15c pool_cache_get(ffffffff828c7ce0) at pool_cache_get+0x323 pool_get(ffffffff828c7ce0,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eae6af8,fffffd806eae6b80,ffffffff827a2b18,fffffd806f2fc100,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eae6648,9,fffffd806f2fc100,0,0,ffff800020e3feb0) at uipc_usrreq+0xbb9 sosend(fffffd806eae6648,0,ffff800020e46110,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e3feb0,7f7ffffe07a0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e3feb0,ffff800020e462a0,ffff800020e462f0) at sys_sendsyslog+0x13e syscall(ffff800020e46370) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe2d20, 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_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f301600+16 0x0!=0x51e1f03123956443 ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff824016e3) at panic+0x15c pool_cache_get(ffffffff828c7ce0) at pool_cache_get+0x323 pool_get(ffffffff828c7ce0,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eae6af8,fffffd806eae6b80,ffffffff827a2b18,fffffd806f2fc100,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eae6648,9,fffffd806f2fc100,0,0,ffff800020e3feb0) at uipc_usrreq+0xbb9 sosend(fffffd806eae6648,0,ffff800020e46110,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e3feb0,7f7ffffe07a0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e3feb0,ffff800020e462a0,ffff800020e462f0) at sys_sendsyslog+0x13e syscall(ffff800020e46370) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe2d20, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e45ca0 rbx 0xffff800020e45d50 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff812cad1f kprintf+0x16f r9 0x1 r10 0x2 r11 0x44cc09267a92210a r12 0x3000000008 r13 0xffff800020e45cb0 r14 0x100 r15 0x1 rip 0xffffffff81ae9b98 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e45c90 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (pflogd) pid=359908 stat=onproc flags process=100012 proc=0 pri=26, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e40390,0xffff800020e40610 process=0xffff8000fffffb38 user=0xffff800020e41000, vmspace=0xfffffd806e8fa5c8 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69458 456700 89942 0 3 0x82 nanosleep syz-executor.0 89942 352180 23 0 3 0x82 thrsleep syz-execprog 89942 479302 23 0 3 0x4000082 nanosleep syz-execprog 89942 316500 23 0 3 0x4000082 thrsleep syz-execprog 89942 312500 23 0 3 0x4000082 thrsleep syz-execprog 89942 217051 23 0 3 0x4000082 kqread syz-execprog 89942 148599 23 0 3 0x4000082 thrsleep syz-execprog 89942 9440 23 0 3 0x4000082 thrsleep syz-execprog 89942 482839 23 0 3 0x4000082 nanosleep syz-execprog 89942 81981 23 0 3 0x4000082 thrsleep syz-execprog 23 481217 21221 0 3 0x10008a pause ksh 21221 330920 79645 0 3 0x92 select sshd 15072 55035 1 0 3 0x100083 ttyin getty 79645 386624 1 0 3 0x80 select sshd *16802 359908 68662 74 7 0x100012 pflogd 68662 498328 1 0 3 0x80 netio pflogd 37755 385676 24952 73 7 0x100090 syslogd 24952 410190 1 0 3 0x100082 netio syslogd 95542 418817 1 77 3 0x100090 poll dhclient 58042 65100 1 0 3 0x80 poll dhclient 27683 391931 0 0 3 0x14200 bored smr 52833 427830 0 0 3 0x14200 pgzero zerothread 80000 364517 0 0 3 0x14200 aiodoned aiodoned 6408 305385 0 0 3 0x14200 syncer update 5437 278749 0 0 3 0x14200 cleaner cleaner 27151 21827 0 0 3 0x14200 reaper reaper 33915 260419 0 0 3 0x14200 pgdaemon pagedaemon 12734 215922 0 0 3 0x14200 bored crynlk 35310 201692 0 0 3 0x14200 bored crypto 59416 11191 0 0 3 0x40014200 acpi0 acpi0 47526 369186 0 0 3 0x40014200 idle1 91978 119584 0 0 3 0x14200 bored softnet 19473 453803 0 0 3 0x14200 bored systqmp 41540 228450 0 0 3 0x14200 bored systq 22939 311569 0 0 3 0x40014200 bored softclock 75267 76719 0 0 3 0x40014200 idle0 1 343605 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 16802 (pflogd) thread 0xffff800020e3feb0 (359908) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff829062a8) #0 witness_lock+0x4c7 #1 syscall+0x400 #2 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 45 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 24 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 75 12K 12K 78643K 959 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 1882 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 40 0 34 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 0 1 0 1 1 0 8 0 pfstkey 112 10 0 0 1 0 1 1 0 8 0 pfstate 328 10 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 256 145 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 1430 0 28 88 0 88 88 0 8 0 ffsino 272 1430 0 28 94 0 94 94 0 8 0 nchpl 144 1655 0 51 60 0 60 60 0 8 0 uvmvnodes 72 1440 0 0 27 0 27 27 0 8 0 vnodes 208 1440 0 0 76 0 76 76 0 8 0 namei 1024 4254 0 4254 2 1 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 4453 0 4453 2 1 1 2 0 8 1 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 247 0 218 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 2 1 1 1 0 8 0 fdescpl 496 232 0 218 3 0 3 3 0 8 0 filepl 152 1128 0 1070 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 144 218 0 217 2 1 1 1 0 8 0 processpl 992 247 0 217 5 0 5 5 0 8 1 procpl 624 255 0 217 4 0 4 4 0 8 1 sockpl 400 86 0 68 2 0 2 2 0 8 0 mcl4k 4096 1 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 256 107 0 0 6 0 6 6 0 8 0 bufpl 280 3053 0 132 209 0 209 209 0 8 0 anonpl 16 22503 0 20864 13 1 12 12 0 124 4 amapchunkpl 152 877 0 811 4 0 4 4 0 158 1 amappl16 192 175 0 139 3 0 3 3 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 30 0 25 1 0 1 1 0 8 0 amappl13 168 22 0 20 2 1 1 1 0 8 0 amappl12 160 16 0 12 2 1 1 1 0 8 0 amappl11 152 52 0 37 1 0 1 1 0 8 0 amappl10 144 14 0 12 1 0 1 1 0 8 0 amappl9 136 234 0 232 1 0 1 1 0 8 0 amappl8 128 270 0 261 1 0 1 1 0 8 0 amappl7 120 122 0 110 1 0 1 1 0 8 0 amappl6 112 21 0 19 2 1 1 1 0 8 0 amappl5 104 132 0 117 1 0 1 1 0 8 0 amappl4 96 491 0 466 1 0 1 1 0 8 0 amappl3 88 106 0 100 1 0 1 1 0 8 0 amappl2 80 922 0 863 3 1 2 2 0 8 0 amappl1 72 15154 0 14739 23 5 18 18 0 8 8 amappl 80 483 0 455 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 24 232 0 218 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 232 0 218 1 0 1 1 0 8 0 vmmpekpl 168 6422 0 6394 2 0 2 2 0 8 0 vmmpepl 168 33230 0 32291 81 8 73 73 0 357 29 vmsppl 368 231 0 218 2 0 2 2 0 8 0 pdppl 4096 471 0 436 6 0 6 6 0 8 1 pvpl 32 113978 0 109963 106 2 104 104 0 265 68 pmappl 232 231 0 218 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(ffffffff824016e3) at panic+0x15c pool_cache_get(ffffffff828c7ce0) at pool_cache_get+0x323 pool_get(ffffffff828c7ce0,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eae6af8,fffffd806eae6b80,ffffffff827a2b18,fffffd806f2fc100,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eae6648,9,fffffd806f2fc100,0,0,ffff800020e3feb0) at uipc_usrreq+0xbb9 sosend(fffffd806eae6648,0,ffff800020e46110,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e3feb0,7f7ffffe07a0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e3feb0,ffff800020e462a0,ffff800020e462f0) at sys_sendsyslog+0x13e syscall(ffff800020e46370) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe2d20, 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 __mp_lock(ffffffff829060a0) at __mp_lock+0x125 __mp_acquire_count(ffffffff829060a0,2) at __mp_acquire_count+0x51 mi_switch() at mi_switch+0x392 sleep_finish(ffff800020e54170,1) at sleep_finish+0x113 sleep_finish_all(ffff800020e54170,1) at sleep_finish_all+0x32 tsleep(fffffd8070bf6d80,118,ffffffff8245f6d4,300) at tsleep+0x1cc kqueue_sleep(fffffd8070bf6d80,ffff800020e54600) at kqueue_sleep+0x101 kqueue_scan(fffffd8070bf6d80,40,1beec6ef8000,ffff800020e54600,ffff800020e3fc40,ffff800020e5464c) at kqueue_scan+0x2b6 sys_kevent(ffff800020e3fc40,ffff800020e546c0,ffff800020e54710) at sys_kevent+0x464 syscall(ffff800020e54790) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcde20, count: 1 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 __mp_lock(ffffffff829060a0) at __mp_lock+0x125 __mp_acquire_count(ffffffff829060a0,2) at __mp_acquire_count+0x51 mi_switch() at mi_switch+0x392 sleep_finish(ffff800020e54170,1) at sleep_finish+0x113 sleep_finish_all(ffff800020e54170,1) at sleep_finish_all+0x32 tsleep(fffffd8070bf6d80,118,ffffffff8245f6d4,300) at tsleep+0x1cc kqueue_sleep(fffffd8070bf6d80,ffff800020e54600) at kqueue_sleep+0x101 kqueue_scan(fffffd8070bf6d80,40,1beec6ef8000,ffff800020e54600,ffff800020e3fc40,ffff800020e5464c) at kqueue_scan+0x2b6 sys_kevent(ffff800020e3fc40,ffff800020e546c0,ffff800020e54710) at sys_kevent+0x464 syscall(ffff800020e54790) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcde20, count: -14 ddb{1}>