kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Thu Jun 18 13:22:11 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-3.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.20' (ECDSA) to the list of known hosts. 2020/06/18 13:22:41 parsed 1 programs 2020/06/18 13:22:46 executed programs: 0 login: panic: pool_do_get: mbufpl free list modified: page 0xfffffd806f1f4000; item addr 0xfffffd806f1f4a00; offset 0x0=0x0 != 0x74be7992739a60ef Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *419364 94980 74 0x100012 0 1K pflogd 37246 73785 73 0x100010 0x80 0 syslogd db_enter() at db_enter+0x18 panic(ffffffff8247a223) at panic+0x15c pool_do_get(ffffffff8290b390,2,ffff800020e62f68) at pool_do_get+0x439 pool_get(ffffffff8290b390,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eae6c88,fffffd806eae6d10,ffffffff827701a8,fffffd806f1f4600,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eae67d8,9,fffffd806f1f4600,0,0,ffff800020e4ec40) at uipc_usrreq+0xbb9 sosend(fffffd806eae67d8,0,ffff800020e63250,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e4ec40,7f7ffffe3b50,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e4ec40,ffff800020e633e0,ffff800020e63430) at sys_sendsyslog+0x13e syscall(ffff800020e634b0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe60d0, 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 0xfffffd806f1f4000; item addr 0xfffffd806f1f4a00; offset 0x0=0x0 != 0x74be7992739a60ef ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff8247a223) at panic+0x15c pool_do_get(ffffffff8290b390,2,ffff800020e62f68) at pool_do_get+0x439 pool_get(ffffffff8290b390,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eae6c88,fffffd806eae6d10,ffffffff827701a8,fffffd806f1f4600,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eae67d8,9,fffffd806f1f4600,0,0,ffff800020e4ec40) at uipc_usrreq+0xbb9 sosend(fffffd806eae67d8,0,ffff800020e63250,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e4ec40,7f7ffffe3b50,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e4ec40,ffff800020e633e0,ffff800020e63430) at sys_sendsyslog+0x13e syscall(ffff800020e634b0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe60d0, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e62db0 rbx 0xffff800020e62e60 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8102be9f kprintf+0x16f r9 0x1 r10 0x2 r11 0xa07fa413d667f7ef r12 0x3000000008 r13 0xffff800020e62dc0 r14 0x100 r15 0x1 rip 0xffffffff81850b98 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e62da0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (pflogd) pid=419364 stat=onproc flags process=100012 proc=0 pri=26, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e4f120,0xffff800020e4f880 process=0xffff800020e39b00 user=0xffff800020e5e000, vmspace=0xfffffd806e8f72e8 estcpu=0, cpticks=3, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9127 280168 23248 0 3 0x82 nanosleep syz-executor.0 23248 126611 89978 0 3 0x82 thrsleep syz-execprog 23248 419390 89978 0 3 0x4000082 nanosleep syz-execprog 23248 73099 89978 0 3 0x4000082 nanosleep syz-execprog 23248 203073 89978 0 3 0x4000082 thrsleep syz-execprog 23248 486888 89978 0 3 0x4000082 thrsleep syz-execprog 23248 75293 89978 0 3 0x4000082 kqread syz-execprog 23248 57347 89978 0 3 0x4000082 thrsleep syz-execprog 23248 223176 89978 0 3 0x4000082 thrsleep syz-execprog 23248 25477 89978 0 3 0x4000082 thrsleep syz-execprog 89978 230604 80861 0 3 0x10008a pause ksh 80861 150291 52218 0 3 0x92 select sshd 90697 191446 1 0 3 0x100083 ttyin getty 52218 164735 1 0 3 0x80 select sshd *94980 419364 84664 74 7 0x100012 pflogd 84664 250150 1 0 3 0x80 netio pflogd 73785 37246 82186 73 7 0x100090 syslogd 82186 185123 1 0 3 0x100082 netio syslogd 74273 422145 1 77 3 0x100090 poll dhclient 86131 80875 1 0 3 0x80 poll dhclient 58395 374828 0 0 3 0x14200 bored smr 20743 438781 0 0 3 0x14200 pgzero zerothread 43979 247930 0 0 3 0x14200 aiodoned aiodoned 58480 185462 0 0 3 0x14200 syncer update 82474 32398 0 0 3 0x14200 cleaner cleaner 7422 55411 0 0 3 0x14200 reaper reaper 48636 161958 0 0 3 0x14200 pgdaemon pagedaemon 96307 280913 0 0 3 0x14200 bored crynlk 31354 35559 0 0 3 0x14200 bored crypto 45984 225102 0 0 3 0x40014200 acpi0 acpi0 98815 155506 0 0 3 0x40014200 idle1 36176 81298 0 0 3 0x14200 bored softnet 78886 505073 0 0 3 0x14200 bored systqmp 14579 209207 0 0 3 0x14200 bored systq 61861 440792 0 0 3 0x40014200 bored softclock 97457 452963 0 0 3 0x40014200 idle0 1 46049 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 (0xffffffff8290b3a0) #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 94980 (pflogd) thread 0xffff800020e4ec40 (419364) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828e7060) #0 witness_lock+0x4c7 #1 syscall+0x400 #2 Xsyscall+0x128 exclusive mutex mbufpl r = 0 (0xffffffff8290b3a0) #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 9468 6396K 6396K 78643K 10561 0 pcb 13 8K 8K 78643K 13 0 rtable 83 2K 2K 78643K 163 0 ifaddr 37 9K 9K 78643K 52 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 31 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 25 122K 122K 78643K 25 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 959 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 3841K 3905K 78643K 1892 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 47 0 41 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 2 1 0 1 1 0 8 0 pfstkey 112 11 0 2 1 0 1 1 0 8 0 pfstate 328 11 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 256 144 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 1437 0 35 88 0 88 88 0 8 0 ffsino 272 1437 0 35 94 0 94 94 0 8 0 nchpl 144 1668 0 65 60 0 60 60 0 8 0 uvmvnodes 72 1447 0 0 27 0 27 27 0 8 0 vnodes 208 1447 0 0 77 0 77 77 0 8 0 namei 1024 4318 0 4318 2 1 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 4661 0 4661 9 3 6 7 0 8 6 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 254 0 225 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 496 239 0 225 3 0 3 3 0 8 0 filepl 152 1183 0 1125 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 96 104 0 95 1 0 1 1 0 8 0 zombiepl 144 225 0 224 2 1 1 1 0 8 0 processpl 984 254 0 224 5 0 5 5 0 8 1 procpl 624 262 0 224 4 0 4 4 0 8 1 sockpl 400 93 0 75 2 0 2 2 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 65 0 0 9 0 9 9 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 110 0 0 6 0 6 6 0 8 0 mbufpl: pool(0xffffffff8290b390:mbufpl): free list modified: page 0xfffffd806dc55000; item ordinal 1; addr 0xfffffd806dc55a00 (p 0xfffffd807ea6d000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd806dc55000; item ordinal 1; addr 0xfffffd806dc55a00 (p 0xfffffd807ea6d000); offset 0x0=0x0 mbufpl: pool(0xffffffff8290b390:mbufpl): page inconsistency: page 0xfffffd806dc55000; item ordinal 2; addr 0xd4b73d94025353e7 mbufpl: pool(0xffffffff8290b390:mbufpl): free list modified: page 0xfffffd806f1f4000; item ordinal 0; addr 0xfffffd806f1f4a00 (p 0xfffffd806f2ed000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd806f1f4000; item ordinal 0; addr 0xfffffd806f1f4a00 (p 0xfffffd806f2ed000); offset 0x0=0x0 mbufpl: pool(0xffffffff8290b390:mbufpl): page inconsistency: page 0xfffffd806f1f4000; item ordinal 1; addr 0xd9a4364e3b64c964 bufpl 280 3058 0 132 209 0 209 209 0 8 0 anonpl 16 22602 0 20949 14 2 12 12 0 124 3 amapchunkpl 152 801 0 735 5 0 5 5 0 158 2 amappl16 192 200 0 166 2 0 2 2 0 8 0 amappl15 184 3 0 1 1 0 1 1 0 8 0 amappl14 176 36 0 30 1 0 1 1 0 8 0 amappl13 168 22 0 20 2 1 1 1 0 8 0 amappl12 160 3 0 3 2 1 1 1 0 8 1 amappl11 152 51 0 36 1 0 1 1 0 8 0 amappl10 144 20 0 17 1 0 1 1 0 8 0 amappl9 136 223 0 221 1 0 1 1 0 8 0 amappl8 128 269 0 262 1 0 1 1 0 8 0 amappl7 120 123 0 111 1 0 1 1 0 8 0 amappl6 112 21 0 19 1 0 1 1 0 8 0 amappl5 104 155 0 141 1 0 1 1 0 8 0 amappl4 96 494 0 469 1 0 1 1 0 8 0 amappl3 88 104 0 99 1 0 1 1 0 8 0 amappl2 80 936 0 878 3 1 2 2 0 8 0 amappl1 72 15390 0 14968 23 5 18 18 0 8 8 amappl 80 488 0 460 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 24 239 0 225 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 239 0 225 1 0 1 1 0 8 0 vmmpekpl 168 6408 0 6383 2 0 2 2 0 8 0 vmmpepl 168 33256 0 32338 82 10 72 72 0 357 30 vmsppl 368 238 0 225 2 0 2 2 0 8 0 pdppl 4096 485 0 450 6 0 6 6 0 8 1 pvpl 32 115076 0 111054 110 6 104 104 0 265 69 pmappl 232 238 0 225 1 0 1 1 0 8 0 extentpl 40 53 0 36 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(ffffffff82790ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828e6e58) at __mp_lock+0x127 __mp_acquire_count(ffffffff828e6e58,2) at __mp_acquire_count+0x51 mi_switch() at mi_switch+0x392 sleep_finish(ffff800020e54b90,1) at sleep_finish+0x113 sleep_finish_all(ffff800020e54b90,1) at sleep_finish_all+0x32 tsleep(fffffd806e8f0ea0,118,ffffffff8244619a,a9f) at tsleep+0x1cc kqueue_sleep(fffffd806e8f0ea0,ffff800020e55020) at kqueue_sleep+0x101 kqueue_scan(fffffd806e8f0ea0,40,10701b90c000,ffff800020e55020,ffff800020e4eeb0,ffff800020e5506c) at kqueue_scan+0x2b6 sys_kevent(ffff800020e4eeb0,ffff800020e550e0,ffff800020e55130) at sys_kevent+0x464 syscall(ffff800020e551b0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdac80, count: 1 ddb{0}> trace x86_ipi_db(ffffffff82790ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828e6e58) at __mp_lock+0x127 __mp_acquire_count(ffffffff828e6e58,2) at __mp_acquire_count+0x51 mi_switch() at mi_switch+0x392 sleep_finish(ffff800020e54b90,1) at sleep_finish+0x113 sleep_finish_all(ffff800020e54b90,1) at sleep_finish_all+0x32 tsleep(fffffd806e8f0ea0,118,ffffffff8244619a,a9f) at tsleep+0x1cc kqueue_sleep(fffffd806e8f0ea0,ffff800020e55020) at kqueue_sleep+0x101 kqueue_scan(fffffd806e8f0ea0,40,10701b90c000,ffff800020e55020,ffff800020e4eeb0,ffff800020e5506c) at kqueue_scan+0x2b6 sys_kevent(ffff800020e4eeb0,ffff800020e550e0,ffff800020e55130) at sys_kevent+0x464 syscall(ffff800020e551b0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdac80, count: -14 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 panic(ffffffff8247a223) at panic+0x15c pool_do_get(ffffffff8290b390,2,ffff800020e62f68) at pool_do_get+0x439 pool_get(ffffffff8290b390,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eae6c88,fffffd806eae6d10,ffffffff827701a8,fffffd806f1f4600,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eae67d8,9,fffffd806f1f4600,0,0,ffff800020e4ec40) at uipc_usrreq+0xbb9 sosend(fffffd806eae67d8,0,ffff800020e63250,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e4ec40,7f7ffffe3b50,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e4ec40,ffff800020e633e0,ffff800020e63430) at sys_sendsyslog+0x13e syscall(ffff800020e634b0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe60d0, count: 3 ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff8247a223) at panic+0x15c pool_do_get(ffffffff8290b390,2,ffff800020e62f68) at pool_do_get+0x439 pool_get(ffffffff8290b390,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806eae6c88,fffffd806eae6d10,ffffffff827701a8,fffffd806f1f4600,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806eae67d8,9,fffffd806f1f4600,0,0,ffff800020e4ec40) at uipc_usrreq+0xbb9 sosend(fffffd806eae67d8,0,ffff800020e63250,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e4ec40,7f7ffffe3b50,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e4ec40,ffff800020e633e0,ffff800020e63430) at sys_sendsyslog+0x13e syscall(ffff800020e634b0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe60d0, count: -12 ddb{1}>