kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Sat Jul 11 19:12:07 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-1.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.1.30' (ECDSA) to the list of known hosts. 2020/07/11 19:12:32 parsed 1 programs 2020/07/11 19:12:36 executed programs: 0 login: panic: pool_do_get: mbufpl free list modified: page 0xfffffd806d2ac000; item addr 0xfffffd806d2aca00; offset 0x0=0xb26d2a0000000000 != 0xb26d2ac0f37058af Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *153861 73392 74 0x100012 0 1K pflogd 332150 15292 73 0x100010 0x80 0 syslogd db_enter() at db_enter+0x18 panic(ffffffff82490314) at panic+0x15c pool_do_get(ffffffff8292bea0,2,ffff800020e46358) at pool_do_get+0x439 pool_get(ffffffff8292bea0,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806ead5e18,fffffd806ead5ea0,ffffffff827992f8,fffffd806d2ac900,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806ead5968,9,fffffd806d2ac900,0,0,ffff800020e3f760) at uipc_usrreq+0xbb9 sosend(fffffd806ead5968,0,ffff800020e46640,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e3f760,7f7ffffcdcd0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e3f760,ffff800020e467d0,ffff800020e46820) at sys_sendsyslog+0x13e syscall(ffff800020e468a0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd0250, 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 0xfffffd806d2ac000; item addr 0xfffffd806d2aca00; offset 0x0=0xb26d2a0000000000 != 0xb26d2ac0f37058af ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff82490314) at panic+0x15c pool_do_get(ffffffff8292bea0,2,ffff800020e46358) at pool_do_get+0x439 pool_get(ffffffff8292bea0,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806ead5e18,fffffd806ead5ea0,ffffffff827992f8,fffffd806d2ac900,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806ead5968,9,fffffd806d2ac900,0,0,ffff800020e3f760) at uipc_usrreq+0xbb9 sosend(fffffd806ead5968,0,ffff800020e46640,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e3f760,7f7ffffcdcd0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e3f760,ffff800020e467d0,ffff800020e46820) at sys_sendsyslog+0x13e syscall(ffff800020e468a0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd0250, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e461a0 rbx 0xffff800020e46250 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff820ec77f kprintf+0x16f r9 0x1 r10 0x2 r11 0x8e82bc9227b5821f r12 0x3000000008 r13 0xffff800020e461b0 r14 0x100 r15 0x1 rip 0xffffffff810b2e08 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e46190 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (pflogd) pid=153861 stat=onproc flags process=100012 proc=0 pri=26, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e3f4f0,0xffff800020e3f020 process=0xffff8000ffffebb8 user=0xffff800020e41000, vmspace=0xfffffd806e8e85c8 estcpu=0, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 32085 342797 78184 0 3 0x82 thrsleep syz-execprog 32085 452786 78184 0 3 0x4000082 thrsleep syz-execprog 32085 232743 78184 0 3 0x4000082 thrsleep syz-execprog 32085 467495 78184 0 3 0x4000082 wait syz-execprog 32085 363679 78184 0 3 0x4000082 thrsleep syz-execprog 32085 434314 78184 0 3 0x4000082 thrsleep syz-execprog 32085 290632 78184 0 3 0x4000082 thrsleep syz-execprog 32085 18992 78184 0 3 0x4000082 kqread syz-execprog 78184 211318 89922 0 3 0x10008a pause ksh 89922 307543 76824 0 3 0x92 select sshd 63560 293374 1 0 3 0x100083 ttyin getty 76824 7890 1 0 3 0x80 select sshd *73392 153861 74724 74 7 0x100012 pflogd 74724 490942 1 0 3 0x80 netio pflogd 15292 332150 91863 73 7 0x100090 syslogd 91863 369462 1 0 3 0x100082 netio syslogd 37364 301458 1 77 3 0x100090 poll dhclient 13077 189756 1 0 3 0x80 poll dhclient 62384 291954 0 0 3 0x14200 bored smr 97641 509235 0 0 3 0x14200 pgzero zerothread 98824 239468 0 0 3 0x14200 aiodoned aiodoned 4955 306666 0 0 3 0x14200 syncer update 71663 465834 0 0 3 0x14200 cleaner cleaner 816 441045 0 0 3 0x14200 reaper reaper 58346 301179 0 0 3 0x14200 pgdaemon pagedaemon 86731 317187 0 0 3 0x14200 bored crynlk 48468 316913 0 0 3 0x14200 bored crypto 89190 279500 0 0 3 0x40014200 acpi0 acpi0 3957 415999 0 0 3 0x40014200 idle1 47175 453583 0 0 3 0x14200 bored softnet 8829 184664 0 0 3 0x14200 bored systqmp 42644 475696 0 0 3 0x14200 bored systq 84057 449274 0 0 3 0x40014200 bored softclock 86401 65484 0 0 3 0x40014200 idle0 1 512868 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 (0xffffffff8292beb0) #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 73392 (pflogd) thread 0xffff800020e3f760 (153861) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828c6be8) #0 witness_lock+0x4c7 #1 syscall+0x400 #2 Xsyscall+0x128 exclusive mutex mbufpl r = 0 (0xffffffff8292beb0) #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 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 75 12K 12K 78643K 948 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 1869 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 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 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 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 4231 0 4231 2 1 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 4616 0 4616 9 2 7 7 0 8 7 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 38 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipepl 304 77 0 71 2 1 1 1 0 8 0 fdescpl 496 226 0 212 3 0 3 3 0 8 0 filepl 152 1117 0 1061 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 144 213 0 212 2 1 1 1 0 8 0 processpl 992 241 0 212 5 0 5 5 0 8 1 procpl 624 248 0 212 3 0 3 3 0 8 0 sockpl 400 80 0 62 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 68 0 0 9 0 9 9 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 94 0 0 6 0 6 6 0 8 0 mbufpl: pool(0xffffffff8292bea0:mbufpl): free list modified: page 0xfffffd806d2ac000; item ordinal 0; addr 0xfffffd806d2aca00 (p 0xfffffd806db28000); offset 0x0=0xb26d2a0000000000 bufpl 280 3048 0 132 209 0 209 209 0 8 0 anonpl 16 22230 0 20588 13 1 12 12 0 124 4 amapchunkpl 152 805 0 726 5 0 5 5 0 158 1 amappl16 192 152 0 118 2 0 2 2 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 30 0 26 1 0 1 1 0 8 0 amappl13 168 30 0 27 2 1 1 1 0 8 0 amappl12 160 12 0 10 2 1 1 1 0 8 0 amappl11 152 51 0 36 1 0 1 1 0 8 0 amappl10 144 17 0 13 1 0 1 1 0 8 0 amappl9 136 230 0 229 1 0 1 1 0 8 0 amappl8 128 274 0 266 1 0 1 1 0 8 0 amappl7 120 116 0 104 1 0 1 1 0 8 0 amappl6 112 24 0 20 1 0 1 1 0 8 0 amappl5 104 133 0 119 1 0 1 1 0 8 0 amappl4 96 497 0 471 1 0 1 1 0 8 0 amappl3 88 105 0 99 1 0 1 1 0 8 0 amappl2 80 904 0 847 3 1 2 2 0 8 0 amappl1 72 15404 0 14983 23 5 18 18 0 8 8 amappl 80 477 0 448 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 6404 0 6376 2 0 2 2 0 8 0 vmmpepl 168 33045 0 32104 83 10 73 73 0 357 29 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 113765 0 109753 109 5 104 104 0 265 69 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 112 232 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(ffffffff8273fff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_cmp4(4e516,4e517) at __sanitizer_cov_trace_cmp4+0x13 __mp_lock(ffffffff828c69e0) at __mp_lock+0x139 __mp_acquire_count(ffffffff828c69e0,2) at __mp_acquire_count+0x51 mi_switch() at mi_switch+0x392 sleep_finish(ffff800020e54650,1) at sleep_finish+0x113 sleep_finish_all(ffff800020e54650,1) at sleep_finish_all+0x32 tsleep(fffffd807e61fea0,118,ffffffff82462fdf,bb9) at tsleep+0x1cc kqueue_sleep(fffffd807e61fea0,ffff800020e54ae0) at kqueue_sleep+0x101 kqueue_scan(fffffd807e61fea0,40,3bc2fe06000,ffff800020e54ae0,ffff800020e40870,ffff800020e54b2c) at kqueue_scan+0x2b6 sys_kevent(ffff800020e40870,ffff800020e54ba0,ffff800020e54bf0) at sys_kevent+0x464 syscall(ffff800020e54c70) at syscall+0x4a4 end trace frame: 0xffff800020e54cf0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8273fff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_cmp4(4e516,4e517) at __sanitizer_cov_trace_cmp4+0x13 __mp_lock(ffffffff828c69e0) at __mp_lock+0x139 __mp_acquire_count(ffffffff828c69e0,2) at __mp_acquire_count+0x51 mi_switch() at mi_switch+0x392 sleep_finish(ffff800020e54650,1) at sleep_finish+0x113 sleep_finish_all(ffff800020e54650,1) at sleep_finish_all+0x32 tsleep(fffffd807e61fea0,118,ffffffff82462fdf,bb9) at tsleep+0x1cc kqueue_sleep(fffffd807e61fea0,ffff800020e54ae0) at kqueue_sleep+0x101 kqueue_scan(fffffd807e61fea0,40,3bc2fe06000,ffff800020e54ae0,ffff800020e40870,ffff800020e54b2c) at kqueue_scan+0x2b6 sys_kevent(ffff800020e40870,ffff800020e54ba0,ffff800020e54bf0) at sys_kevent+0x464 syscall(ffff800020e54c70) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe1d40, count: -15 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 panic(ffffffff82490314) at panic+0x15c pool_do_get(ffffffff8292bea0,2,ffff800020e46358) at pool_do_get+0x439 pool_get(ffffffff8292bea0,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806ead5e18,fffffd806ead5ea0,ffffffff827992f8,fffffd806d2ac900,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806ead5968,9,fffffd806d2ac900,0,0,ffff800020e3f760) at uipc_usrreq+0xbb9 sosend(fffffd806ead5968,0,ffff800020e46640,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e3f760,7f7ffffcdcd0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e3f760,ffff800020e467d0,ffff800020e46820) at sys_sendsyslog+0x13e syscall(ffff800020e468a0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd0250, count: 3 ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff82490314) at panic+0x15c pool_do_get(ffffffff8292bea0,2,ffff800020e46358) at pool_do_get+0x439 pool_get(ffffffff8292bea0,2) at pool_get+0xeb m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806ead5e18,fffffd806ead5ea0,ffffffff827992f8,fffffd806d2ac900,0) at sbappendaddr+0x2e9 uipc_usrreq(fffffd806ead5968,9,fffffd806d2ac900,0,0,ffff800020e3f760) at uipc_usrreq+0xbb9 sosend(fffffd806ead5968,0,ffff800020e46640,0,0,0) at sosend+0x671 dosendsyslog(ffff800020e3f760,7f7ffffcdcd0,3d,0,0) at dosendsyslog+0x2b8 sys_sendsyslog(ffff800020e3f760,ffff800020e467d0,ffff800020e46820) at sys_sendsyslog+0x13e syscall(ffff800020e468a0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd0250, count: -12 ddb{1}>