kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Sat Jun 27 12:04:46 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-6.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.10.5' (ECDSA) to the list of known hosts. 2020/06/27 12:05:11 parsed 1 programs 2020/06/27 12:05:14 executed programs: 0 login: panic: pool_do_get: mbufpl free list modified: page 0xfffffd806d780000; item addr 0xfffffd806d780700; offset 0x0=0x0 != 0xbbc1a761d9b349fc Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x18 panic(ffffffff8248b0e8) at panic+0x15c pool_do_get(ffffffff82912b20,2,ffff800020ed3358) at pool_do_get+0x439 pool_get(ffffffff82912b20,2) at pool_get+0xeb m_gethdr(2,1) at m_gethdr+0x4c rtm_msg1(d,ffff800020ed3468) at rtm_msg1+0x6e rtm_addr(d,ffff800000aa2d00) at rtm_addr+0x9b rt_ifa_del(ffff800000aa2d00,200404,ffff800000aa2d58,0) at rt_ifa_del+0x3ed rt_ifa_dellocal(ffff800000aa2d00) at rt_ifa_dellocal+0x149 in_purgeaddr(ffff800000aa2d00) at in_purgeaddr+0x12a in_ifdetach(ffff800000ac6000) at in_ifdetach+0x74 if_detach(ffff800000ac6000) at if_detach+0x140 tun_clone_destroy(ffff800000ac6000) at tun_clone_destroy+0x1f2 tun_dev_close(5d00,7) at tun_dev_close+0x160 end trace frame: 0xffff800020ed3930, count: 0 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 0xfffffd806d780000; item addr 0xfffffd806d780700; offset 0x0=0x0 != 0xbbc1a761d9b349fc ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff8248b0e8) at panic+0x15c pool_do_get(ffffffff82912b20,2,ffff800020ed3358) at pool_do_get+0x439 pool_get(ffffffff82912b20,2) at pool_get+0xeb m_gethdr(2,1) at m_gethdr+0x4c rtm_msg1(d,ffff800020ed3468) at rtm_msg1+0x6e rtm_addr(d,ffff800000aa2d00) at rtm_addr+0x9b rt_ifa_del(ffff800000aa2d00,200404,ffff800000aa2d58,0) at rt_ifa_del+0x3ed rt_ifa_dellocal(ffff800000aa2d00) at rt_ifa_dellocal+0x149 in_purgeaddr(ffff800000aa2d00) at in_purgeaddr+0x12a in_ifdetach(ffff800000ac6000) at in_ifdetach+0x74 if_detach(ffff800000ac6000) at if_detach+0x140 tun_clone_destroy(ffff800000ac6000) at tun_clone_destroy+0x1f2 tun_dev_close(5d00,7) at tun_dev_close+0x160 spec_close(ffff800020ed3940) at spec_close+0x311 VOP_CLOSE(fffffd8075ba1418,7,fffffd807f7bfba0,ffff800020ddc4e8) at VOP_CLOSE+0xc0 vn_closefile(fffffd806cf5e568,ffff800020ddc4e8) at vn_closefile+0xd7 fdrop(fffffd806cf5e568,ffff800020ddc4e8) at fdrop+0xc2 closef(fffffd806cf5e568,ffff800020ddc4e8) at closef+0x11c fdfree(ffff800020ddc4e8) at fdfree+0x101 exit1(ffff800020ddc4e8,0,9,1) at exit1+0x32c postsig(ffff800020ddc4e8,9) at postsig+0x4ed userret(ffff800020ddc4e8) at userret+0x199 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffd9cf0, count: -24 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020ed31a0 rbx 0xffff800020ed3250 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81d5511f kprintf+0x16f r9 0x1 r10 0x2 r11 0x364c264f694a8911 r12 0x3000000008 r13 0xffff800020ed31b0 r14 0x100 r15 0x1 rip 0xffffffff81cc5078 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020ed3190 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=265752 stat=onproc flags process=a proc=2000 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020ddc758,0xffff800020dddd58 process=0xffff800020df0010 user=0xffff800020ece000, vmspace=0xfffffd807f000b80 estcpu=36, cpticks=3, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69049 460101 45303 0 3 0x82 thrsleep syz-execprog 69049 55571 45303 0 3 0x4000082 thrsleep syz-execprog 69049 389794 45303 0 3 0x4000082 thrsleep syz-execprog 69049 306105 45303 0 3 0x4000082 thrsleep syz-execprog 69049 170226 45303 0 3 0x4000082 wait syz-execprog 69049 518915 45303 0 3 0x4000082 thrsleep syz-execprog 69049 463730 45303 0 3 0x4000082 thrsleep syz-execprog 69049 300991 45303 0 3 0x4000082 thrsleep syz-execprog 69049 28019 45303 0 3 0x4000082 kqread syz-execprog 45303 483751 20541 0 3 0x10008a pause ksh 20541 176821 84341 0 3 0x92 select sshd 87034 96177 1 0 3 0x100083 ttyin getty 84341 510741 1 0 3 0x80 select sshd 99114 312083 11149 74 3 0x100092 bpf pflogd 11149 502513 1 0 3 0x80 netio pflogd 11783 304580 28263 73 3 0x100090 kqread syslogd 28263 25694 1 0 3 0x100082 netio syslogd 75179 389811 1 77 3 0x100090 poll dhclient 28348 176747 1 0 3 0x80 poll dhclient 88140 113743 0 0 3 0x14200 bored smr 50436 344688 0 0 3 0x14200 pgzero zerothread 40299 185073 0 0 3 0x14200 aiodoned aiodoned 60873 271544 0 0 3 0x14200 syncer update 95673 200273 0 0 3 0x14200 cleaner cleaner 26555 8975 0 0 3 0x14200 reaper reaper 38044 80002 0 0 3 0x14200 pgdaemon pagedaemon 77959 239397 0 0 3 0x14200 bored crynlk 90404 368287 0 0 3 0x14200 bored crypto 18860 199806 0 0 3 0x40014200 acpi0 acpi0 62222 239856 0 0 3 0x40014200 idle1 32502 123006 0 0 3 0x14200 bored softnet 67739 15078 0 0 3 0x14200 bored systqmp 2879 82024 0 0 3 0x14200 bored systq 88804 299564 0 0 3 0x40014200 bored softclock 24983 9172 0 0 7 0x40014200 idle0 1 133756 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 (0xffffffff82912b30) #0 witness_lock+0x4c7 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b #3 pool_get+0xbf #4 m_gethdr+0x4c #5 rtm_msg1+0x6e #6 rtm_addr+0x9b #7 rt_ifa_del+0x3ed #8 rt_ifa_dellocal+0x149 #9 in_purgeaddr+0x12a #10 in_ifdetach+0x74 #11 if_detach+0x140 #12 tun_clone_destroy+0x1f2 #13 tun_dev_close+0x160 #14 spec_close+0x311 #15 VOP_CLOSE+0xc0 #16 vn_closefile+0xd7 #17 fdrop+0xc2 #18 closef+0x11c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9465 6396K 6396K 78643K 10560 0 pcb 13 8K 8K 78643K 13 0 rtable 79 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 74 12K 12K 78643K 949 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 3853K 3917K 78643K 1868 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 1 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 3 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 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 256 145 0 2 10 0 10 10 0 8 0 art_table 32 146 0 2 2 0 2 2 0 8 0 art_node 16 33 0 6 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 4609 0 4609 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 pipelkpl 48 77 0 71 2 1 1 1 0 8 0 pipepl 120 154 0 143 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 984 241 0 212 5 0 5 5 0 8 1 procpl 624 249 0 212 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 76 0 0 10 0 10 10 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 100 0 0 6 0 6 6 0 8 0 mbufpl: pool(0xffffffff82912b20:mbufpl): free list modified: page 0xfffffd806d780000; item ordinal 0; addr 0xfffffd806d780700 (p 0xfffffd8076167000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd806d780000; item ordinal 0; addr 0xfffffd806d780700 (p 0xfffffd8076167000); offset 0x0=0x0 mbufpl: pool(0xffffffff82912b20:mbufpl): page inconsistency: page 0xfffffd806d780000; item ordinal 1; addr 0x63f2cc6af6000f60 bufpl 280 3048 0 132 209 0 209 209 0 8 0 anonpl 16 22186 0 20561 14 2 12 12 0 124 4 amapchunkpl 152 871 0 805 4 0 4 4 0 158 0 amappl16 192 158 0 126 2 0 2 2 0 8 0 amappl15 184 3 0 1 1 0 1 1 0 8 0 amappl14 176 30 0 26 1 0 1 1 0 8 0 amappl13 168 22 0 20 2 1 1 1 0 8 0 amappl12 160 4 0 3 2 1 1 1 0 8 0 amappl11 152 52 0 37 1 0 1 1 0 8 0 amappl10 144 18 0 14 1 0 1 1 0 8 0 amappl9 136 225 0 224 1 0 1 1 0 8 0 amappl8 128 273 0 266 1 0 1 1 0 8 0 amappl7 120 113 0 102 1 0 1 1 0 8 0 amappl6 112 24 0 20 2 1 1 1 0 8 0 amappl5 104 145 0 129 1 0 1 1 0 8 0 amappl4 96 494 0 468 1 0 1 1 0 8 0 amappl3 88 104 0 99 1 0 1 1 0 8 0 amappl2 80 909 0 850 2 0 2 2 0 8 0 amappl1 72 15280 0 14857 23 5 18 18 0 8 8 amappl 80 477 0 449 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 24 226 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 6388 0 6361 2 0 2 2 0 8 0 vmmpepl 168 32608 0 31685 80 8 72 72 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 113478 0 109476 106 2 104 104 0 265 68 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{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff8274fff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82911d90) at __mp_lock+0x127 softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffffffff8274fff0) at sched_idle+0x3f7 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff8274fff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82911d90) at __mp_lock+0x127 softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffffffff8274fff0) 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(ffffffff8248b0e8) at panic+0x15c pool_do_get(ffffffff82912b20,2,ffff800020ed3358) at pool_do_get+0x439 pool_get(ffffffff82912b20,2) at pool_get+0xeb m_gethdr(2,1) at m_gethdr+0x4c rtm_msg1(d,ffff800020ed3468) at rtm_msg1+0x6e rtm_addr(d,ffff800000aa2d00) at rtm_addr+0x9b rt_ifa_del(ffff800000aa2d00,200404,ffff800000aa2d58,0) at rt_ifa_del+0x3ed rt_ifa_dellocal(ffff800000aa2d00) at rt_ifa_dellocal+0x149 in_purgeaddr(ffff800000aa2d00) at in_purgeaddr+0x12a in_ifdetach(ffff800000ac6000) at in_ifdetach+0x74 if_detach(ffff800000ac6000) at if_detach+0x140 tun_clone_destroy(ffff800000ac6000) at tun_clone_destroy+0x1f2 tun_dev_close(5d00,7) at tun_dev_close+0x160 end trace frame: 0xffff800020ed3930, count: 0 ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff8248b0e8) at panic+0x15c pool_do_get(ffffffff82912b20,2,ffff800020ed3358) at pool_do_get+0x439 pool_get(ffffffff82912b20,2) at pool_get+0xeb m_gethdr(2,1) at m_gethdr+0x4c rtm_msg1(d,ffff800020ed3468) at rtm_msg1+0x6e rtm_addr(d,ffff800000aa2d00) at rtm_addr+0x9b rt_ifa_del(ffff800000aa2d00,200404,ffff800000aa2d58,0) at rt_ifa_del+0x3ed rt_ifa_dellocal(ffff800000aa2d00) at rt_ifa_dellocal+0x149 in_purgeaddr(ffff800000aa2d00) at in_purgeaddr+0x12a in_ifdetach(ffff800000ac6000) at in_ifdetach+0x74 if_detach(ffff800000ac6000) at if_detach+0x140 tun_clone_destroy(ffff800000ac6000) at tun_clone_destroy+0x1f2 tun_dev_close(5d00,7) at tun_dev_close+0x160 spec_close(ffff800020ed3940) at spec_close+0x311 VOP_CLOSE(fffffd8075ba1418,7,fffffd807f7bfba0,ffff800020ddc4e8) at VOP_CLOSE+0xc0 vn_closefile(fffffd806cf5e568,ffff800020ddc4e8) at vn_closefile+0xd7 fdrop(fffffd806cf5e568,ffff800020ddc4e8) at fdrop+0xc2 closef(fffffd806cf5e568,ffff800020ddc4e8) at closef+0x11c fdfree(ffff800020ddc4e8) at fdfree+0x101 exit1(ffff800020ddc4e8,0,9,1) at exit1+0x32c postsig(ffff800020ddc4e8,9) at postsig+0x4ed userret(ffff800020ddc4e8) at userret+0x199 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffd9cf0, count: -24 ddb{1}>