kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Sun May 31 11:03:30 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-0.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.68' (ECDSA) to the list of known hosts. 2020/05/31 11:03:44 parsed 1 programs 2020/05/31 11:03:47 executed programs: 0 login: panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806d925700+16 0x0!=0x14ed78d60004a1b4 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x18 panic(ffffffff821fefa6) at panic+0x15c pool_cache_get(ffffffff82656440) at pool_cache_get+0x323 pool_get(ffffffff82656440,2) at pool_get+0x91 m_gethdr(2,1) at m_gethdr+0x4c rtm_msg1(2,ffff800020f69080) at rtm_msg1+0x6e rtm_send(fffffd806f3e4690,2,0,0) at rtm_send+0x120 rt_ifa_del(ffff800000a0cf00,800100,ffff800000a0cf58,0) at rt_ifa_del+0x3bb in_purgeaddr(ffff800000a0cf00) at in_purgeaddr+0xc6 in_ifdetach(ffff8000009d5000) at in_ifdetach+0x74 if_detach(ffff8000009d5000) at if_detach+0x140 tun_clone_destroy(ffff8000009d5000) at tun_clone_destroy+0x1f2 tun_dev_close(5d00,7) at tun_dev_close+0x160 spec_close(ffff800020f69520) at spec_close+0x311 end trace frame: 0xffff800020f69590, 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_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806d925700+16 0x0!=0x14ed78d60004a1b4 ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff821fefa6) at panic+0x15c pool_cache_get(ffffffff82656440) at pool_cache_get+0x323 pool_get(ffffffff82656440,2) at pool_get+0x91 m_gethdr(2,1) at m_gethdr+0x4c rtm_msg1(2,ffff800020f69080) at rtm_msg1+0x6e rtm_send(fffffd806f3e4690,2,0,0) at rtm_send+0x120 rt_ifa_del(ffff800000a0cf00,800100,ffff800000a0cf58,0) at rt_ifa_del+0x3bb in_purgeaddr(ffff800000a0cf00) at in_purgeaddr+0xc6 in_ifdetach(ffff8000009d5000) at in_ifdetach+0x74 if_detach(ffff8000009d5000) at if_detach+0x140 tun_clone_destroy(ffff8000009d5000) at tun_clone_destroy+0x1f2 tun_dev_close(5d00,7) at tun_dev_close+0x160 spec_close(ffff800020f69520) at spec_close+0x311 VOP_CLOSE(fffffd806e310418,7,fffffd807f7bfb40,ffff800020e6c278) at VOP_CLOSE+0xc0 vn_closefile(fffffd806d0837c8,ffff800020e6c278) at vn_closefile+0xd7 fdrop(fffffd806d0837c8,ffff800020e6c278) at fdrop+0xc2 closef(fffffd806d0837c8,ffff800020e6c278) at closef+0x11c fdfree(ffff800020e6c278) at fdfree+0x101 exit1(ffff800020e6c278,0,9,1) at exit1+0x32c postsig(ffff800020e6c278,9) at postsig+0x4ed userret(ffff800020e6c278) at userret+0x199 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffdbb40, count: -23 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020f68da0 rbx 0xffff800020f68e50 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff812e663f kprintf+0x16f r9 0x1 r10 0x2 r11 0x752e4599009f7ccc r12 0x3000000008 r13 0xffff800020f68db0 r14 0x100 r15 0x1 rip 0xffffffff821c8118 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020f68d90 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=204027 stat=onproc flags process=a proc=2000 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6cc38,0xffffffff82674598 process=0xffff800020e80010 user=0xffff800020f64000, vmspace=0xfffffd807f000cf0 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88035 270544 71781 0 3 0x82 thrsleep syz-execprog 88035 491682 71781 0 3 0x4000082 thrsleep syz-execprog 88035 361322 71781 0 3 0x4000082 thrsleep syz-execprog 88035 516283 71781 0 3 0x4000082 thrsleep syz-execprog 88035 511290 71781 0 3 0x4000082 thrsleep syz-execprog 88035 277306 71781 0 3 0x4000082 kqread syz-execprog 88035 193967 71781 0 3 0x4000082 wait syz-execprog 88035 480693 71781 0 3 0x4000082 thrsleep syz-execprog 88035 380813 71781 0 3 0x4000082 thrsleep syz-execprog 71781 393180 31588 0 3 0x10008a pause ksh 31588 58351 21722 0 3 0x92 select sshd 46017 143700 1 0 3 0x100083 ttyin getty 21722 119441 1 0 3 0x80 select sshd 51096 75954 18733 74 3 0x100092 bpf pflogd 18733 404704 1 0 3 0x80 netio pflogd 73156 381147 63980 73 3 0x100090 kqread syslogd 63980 28483 1 0 3 0x100082 netio syslogd 11299 184696 1 77 3 0x100090 poll dhclient 16591 496460 1 0 3 0x80 poll dhclient 6693 378090 0 0 3 0x14200 bored smr 67005 226330 0 0 3 0x14200 pgzero zerothread 93459 427959 0 0 3 0x14200 aiodoned aiodoned 98881 386143 0 0 3 0x14200 syncer update 70691 154699 0 0 3 0x14200 cleaner cleaner 11239 117291 0 0 3 0x14200 reaper reaper 80473 289651 0 0 3 0x14200 pgdaemon pagedaemon 71379 91129 0 0 3 0x14200 bored crynlk 55880 61796 0 0 3 0x14200 bored crypto 44289 398934 0 0 3 0x40014200 acpi0 acpi0 76121 411001 0 0 3 0x40014200 idle1 99148 18262 0 0 3 0x14200 bored softnet 11535 42910 0 0 3 0x14200 bored systqmp 64165 282883 0 0 3 0x14200 bored systq 61145 317027 0 0 3 0x40014200 bored softclock 68974 136375 0 0 7 0x40014200 idle0 1 400030 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks 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 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 73 12K 12K 78643K 946 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 3029K 3093K 78643K 1867 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 1 0 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 280 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 256 144 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 4 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 1642 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 4211 0 4211 1 0 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 3843 0 3843 2 1 1 2 0 8 1 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 1 0 1 1 0 8 0 pipepl 120 154 0 143 1 0 1 1 0 8 0 fdescpl 496 226 0 212 3 0 3 3 0 8 0 filepl 152 1116 0 1060 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 1 0 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 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 67 0 0 9 0 9 9 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 86 0 0 6 0 6 6 0 8 0 bufpl 280 2986 0 133 204 0 204 204 0 8 0 anonpl 16 22400 0 20753 13 1 12 12 0 124 3 amapchunkpl 152 822 0 756 5 0 5 5 0 158 2 amappl16 192 147 0 113 3 0 3 3 0 8 0 amappl15 184 4 0 1 1 0 1 1 0 8 0 amappl14 176 27 0 23 1 0 1 1 0 8 0 amappl13 168 22 0 20 1 0 1 1 0 8 0 amappl12 160 6 0 4 1 0 1 1 0 8 0 amappl11 152 52 0 37 1 0 1 1 0 8 0 amappl10 144 23 0 21 1 0 1 1 0 8 0 amappl9 136 239 0 238 1 0 1 1 0 8 0 amappl8 128 273 0 265 1 0 1 1 0 8 0 amappl7 120 113 0 103 1 0 1 1 0 8 0 amappl6 112 26 0 23 2 1 1 1 0 8 0 amappl5 104 124 0 109 1 0 1 1 0 8 0 amappl4 96 506 0 475 1 0 1 1 0 8 0 amappl3 88 105 0 100 1 0 1 1 0 8 0 amappl2 80 914 0 854 2 0 2 2 0 8 0 amappl1 72 15579 0 15160 23 5 18 18 0 8 8 amappl 80 478 0 450 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 6335 0 6307 2 0 2 2 0 8 0 vmmpepl 168 32772 0 31846 79 7 72 72 0 357 29 vmsppl 368 225 0 212 2 0 2 2 0 8 0 pdppl 4096 460 0 424 6 0 6 6 0 8 0 pvpl 32 113906 0 109888 104 0 104 104 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 112 231 0 3 7 0 7 7 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff824cbff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff826418e0) at __mp_lock+0x127 softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffffffff824cbff0) at sched_idle+0x3f7 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff824cbff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff826418e0) at __mp_lock+0x127 softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffffffff824cbff0) 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(ffffffff821fefa6) at panic+0x15c pool_cache_get(ffffffff82656440) at pool_cache_get+0x323 pool_get(ffffffff82656440,2) at pool_get+0x91 m_gethdr(2,1) at m_gethdr+0x4c rtm_msg1(2,ffff800020f69080) at rtm_msg1+0x6e rtm_send(fffffd806f3e4690,2,0,0) at rtm_send+0x120 rt_ifa_del(ffff800000a0cf00,800100,ffff800000a0cf58,0) at rt_ifa_del+0x3bb in_purgeaddr(ffff800000a0cf00) at in_purgeaddr+0xc6 in_ifdetach(ffff8000009d5000) at in_ifdetach+0x74 if_detach(ffff8000009d5000) at if_detach+0x140 tun_clone_destroy(ffff8000009d5000) at tun_clone_destroy+0x1f2 tun_dev_close(5d00,7) at tun_dev_close+0x160 spec_close(ffff800020f69520) at spec_close+0x311 end trace frame: 0xffff800020f69590, count: 0 ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff821fefa6) at panic+0x15c pool_cache_get(ffffffff82656440) at pool_cache_get+0x323 pool_get(ffffffff82656440,2) at pool_get+0x91 m_gethdr(2,1) at m_gethdr+0x4c rtm_msg1(2,ffff800020f69080) at rtm_msg1+0x6e rtm_send(fffffd806f3e4690,2,0,0) at rtm_send+0x120 rt_ifa_del(ffff800000a0cf00,800100,ffff800000a0cf58,0) at rt_ifa_del+0x3bb in_purgeaddr(ffff800000a0cf00) at in_purgeaddr+0xc6 in_ifdetach(ffff8000009d5000) at in_ifdetach+0x74 if_detach(ffff8000009d5000) at if_detach+0x140 tun_clone_destroy(ffff8000009d5000) at tun_clone_destroy+0x1f2 tun_dev_close(5d00,7) at tun_dev_close+0x160 spec_close(ffff800020f69520) at spec_close+0x311 VOP_CLOSE(fffffd806e310418,7,fffffd807f7bfb40,ffff800020e6c278) at VOP_CLOSE+0xc0 vn_closefile(fffffd806d0837c8,ffff800020e6c278) at vn_closefile+0xd7 fdrop(fffffd806d0837c8,ffff800020e6c278) at fdrop+0xc2 closef(fffffd806d0837c8,ffff800020e6c278) at closef+0x11c fdfree(ffff800020e6c278) at fdfree+0x101 exit1(ffff800020e6c278,0,9,1) at exit1+0x32c postsig(ffff800020e6c278,9) at postsig+0x4ed userret(ffff800020e6c278) at userret+0x199 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffdbb40, count: -23 ddb{1}>