kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Thu Apr 30 10:50:45 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-5.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.176' (ECDSA) to the list of known hosts. 2020/04/30 10:52:59 parsed 1 programs 2020/04/30 10:53:04 executed programs: 0 login: panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f163f00+16 0x0!=0xb2ad34b41eafbe4e Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 444316 11222 0 0x14000 0x200 0 systqmp db_enter() at db_enter+0x18 panic(ffffffff821f8f5b) at panic+0x15c pool_cache_get(ffffffff82667c68) at pool_cache_get+0x323 pool_get(ffffffff82667c68,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806f6d6190,fffffd806f6d6218,ffffffff822ac030,fffffd806f163e00,0) at sbappendaddr+0x2e9 rtm_sendup(fffffd806f6d6190,fffffd806f163e00,0) at rtm_sendup+0xef route_input(fffffd806f163e00,0,2) at route_input+0x489 rtm_send(fffffd806f3bc690,2,0,0) at rtm_send+0x18d rt_ifa_del(ffff8000009db800,400004,ffff8000009db868,0) at rt_ifa_del+0x3bb in_purgeaddr(ffff8000009db800) at in_purgeaddr+0x114 in_ifdetach(ffff8000009d5000) at in_ifdetach+0x74 if_detach(ffff8000009d5000) at if_detach+0x140 tun_clone_destroy(ffff8000009d5000) at tun_clone_destroy+0x1f2 end trace frame: 0xffff800020f60ca0, 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 0xfffffd806f163f00+16 0x0!=0xb2ad34b41eafbe4e ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff821f8f5b) at panic+0x15c pool_cache_get(ffffffff82667c68) at pool_cache_get+0x323 pool_get(ffffffff82667c68,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806f6d6190,fffffd806f6d6218,ffffffff822ac030,fffffd806f163e00,0) at sbappendaddr+0x2e9 rtm_sendup(fffffd806f6d6190,fffffd806f163e00,0) at rtm_sendup+0xef route_input(fffffd806f163e00,0,2) at route_input+0x489 rtm_send(fffffd806f3bc690,2,0,0) at rtm_send+0x18d rt_ifa_del(ffff8000009db800,400004,ffff8000009db868,0) at rt_ifa_del+0x3bb in_purgeaddr(ffff8000009db800) at in_purgeaddr+0x114 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(ffff800020f60d20) at spec_close+0x311 VOP_CLOSE(fffffd806e2f2008,7,fffffd807f7bfb40,ffff800020e6c4e8) at VOP_CLOSE+0xc0 vn_closefile(fffffd806d07e698,ffff800020e6c4e8) at vn_closefile+0xd7 fdrop(fffffd806d07e698,ffff800020e6c4e8) at fdrop+0xc2 closef(fffffd806d07e698,ffff800020e6c4e8) at closef+0x11c fdfree(ffff800020e6c4e8) at fdfree+0x101 exit1(ffff800020e6c4e8,0,9,1) at exit1+0x32c postsig(ffff800020e6c4e8,9) at postsig+0x4ed userret(ffff800020e6c4e8) at userret+0x199 syscall(ffff800020f611a0) at syscall+0x55f Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe8570, count: -26 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020f60470 rbx 0xffff800020f60520 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8176694f kprintf+0x16f r9 0x1 r10 0x8160a7647ea7edcf r11 0xe86d8c84066d852 r12 0x3000000008 r13 0xffff800020f60480 r14 0x100 r15 0x1 rip 0xffffffff81332a38 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020f60460 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=341786 stat=onproc flags process=a proc=2000 pri=32, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6c758,0xffff800020e6c018 process=0xffff800020e80010 user=0xffff800020f5c000, vmspace=0xfffffd807efffb80 estcpu=25, cpticks=3, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 24302 148988 4 0 3 0x82 thrsleep syz-execprog 24302 221092 4 0 3 0x4000082 thrsleep syz-execprog 24302 219683 4 0 3 0x4000082 wait syz-execprog 24302 150537 4 0 3 0x4000082 thrsleep syz-execprog 24302 316321 4 0 3 0x4000082 thrsleep syz-execprog 24302 438670 4 0 3 0x4000082 thrsleep syz-execprog 24302 393955 4 0 3 0x4000082 thrsleep syz-execprog 24302 77242 4 0 3 0x4000082 thrsleep syz-execprog 24302 148234 4 0 3 0x4000082 kqread syz-execprog 4 68351 43416 0 3 0x10008a pause ksh 43416 186511 39694 0 3 0x92 select sshd 83118 481188 1 0 3 0x100083 ttyin getty 39694 175249 1 0 3 0x80 select sshd 6112 30497 25817 74 3 0x100092 bpf pflogd 25817 341672 1 0 3 0x80 netio pflogd 22234 178979 19954 73 3 0x100090 kqread syslogd 19954 18878 1 0 3 0x100082 netio syslogd 52020 448605 1 77 3 0x100090 poll dhclient 79651 433281 1 0 3 0x80 poll dhclient 47986 50486 0 0 3 0x14200 bored smr 28673 106320 0 0 3 0x14200 pgzero zerothread 75049 306659 0 0 3 0x14200 aiodoned aiodoned 17972 307811 0 0 3 0x14200 syncer update 16492 212579 0 0 3 0x14200 cleaner cleaner 74087 40184 0 0 3 0x14200 reaper reaper 51581 348450 0 0 3 0x14200 pgdaemon pagedaemon 77010 277122 0 0 3 0x14200 bored crynlk 7565 199792 0 0 3 0x14200 bored crypto 58844 372381 0 0 3 0x40014200 acpi0 acpi0 76391 363349 0 0 3 0x40014200 idle1 83843 114092 0 0 3 0x14200 bored softnet 11222 444316 0 0 7 0x14200 systqmp 69490 309934 0 0 3 0x14200 bored systq 71111 153597 0 0 3 0x40014200 bored softclock 32274 339862 0 0 3 0x40014200 idle0 1 441151 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 11222 (systqmp) thread 0xffff800020e18c30 (444316) shared rwlock systqmp r = 0 (0xffffffff8249bee0) #0 witness_lock+0x4c7 #1 taskq_thread+0x8f #2 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9464 6395K 6395K 78643K 10557 0 pcb 13 8K 8K 78643K 13 0 rtable 81 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 1809 196K 290K 78643K 12766 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 945 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 3033K 3097K 78643K 1864 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 2 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 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 6 2 1 1 1 0 8 0 pfstkey 112 10 0 6 2 1 1 1 0 8 0 pfstate 328 10 0 6 2 1 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 1 9 0 9 9 0 8 0 art_table 32 145 0 1 2 0 2 2 0 8 0 art_node 16 33 0 5 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 1640 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 4205 0 4205 2 1 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 4013 0 4013 12 11 1 7 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 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 1111 0 1055 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 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 80 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 131 0 0 7 0 7 7 0 8 0 bufpl 280 2984 0 132 204 0 204 204 0 8 0 anonpl 16 22187 0 20572 13 1 12 12 0 124 4 amapchunkpl 152 723 0 656 5 0 5 5 0 158 2 amappl16 192 143 0 112 2 0 2 2 0 8 0 amappl15 184 2 0 1 1 0 1 1 0 8 0 amappl14 176 37 0 30 1 0 1 1 0 8 0 amappl13 168 20 0 19 2 1 1 1 0 8 0 amappl12 160 9 0 8 2 1 1 1 0 8 0 amappl11 152 52 0 37 1 0 1 1 0 8 0 amappl10 144 16 0 12 1 0 1 1 0 8 0 amappl9 136 243 0 241 1 0 1 1 0 8 0 amappl8 128 274 0 266 1 0 1 1 0 8 0 amappl7 120 113 0 103 1 0 1 1 0 8 0 amappl6 112 20 0 19 2 1 1 1 0 8 0 amappl5 104 126 0 111 1 0 1 1 0 8 0 amappl4 96 495 0 469 1 0 1 1 0 8 0 amappl3 88 108 0 101 1 0 1 1 0 8 0 amappl2 80 905 0 849 2 0 2 2 0 8 0 amappl1 72 15180 0 14760 24 6 18 18 0 8 8 amappl 80 474 0 446 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 6352 0 6326 2 0 2 2 0 8 0 vmmpepl 168 32507 0 31587 85 13 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 113393 0 109382 107 3 104 104 0 265 69 pmappl 232 225 0 212 1 0 1 1 0 8 0 extentpl 40 46 0 29 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(ffffffff824bfff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82665840) at __mp_lock+0x127 softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f mtx_enter(ffffffff8249bea0) at mtx_enter+0x17 msleep(ffffffff8249be80,ffffffff8249bea0,20,ffffffff8221ee6e,0) at msleep+0x242 taskq_next_work(ffffffff8249be80,ffff800020e332f8) at taskq_next_work+0xbe taskq_thread(ffffffff8249be80) at taskq_thread+0xe5 end trace frame: 0x0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff824bfff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82665840) at __mp_lock+0x127 softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f mtx_enter(ffffffff8249bea0) at mtx_enter+0x17 msleep(ffffffff8249be80,ffffffff8249bea0,20,ffffffff8221ee6e,0) at msleep+0x242 taskq_next_work(ffffffff8249be80,ffff800020e332f8) at taskq_next_work+0xbe taskq_thread(ffffffff8249be80) at taskq_thread+0xe5 end trace frame: 0x0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 panic(ffffffff821f8f5b) at panic+0x15c pool_cache_get(ffffffff82667c68) at pool_cache_get+0x323 pool_get(ffffffff82667c68,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806f6d6190,fffffd806f6d6218,ffffffff822ac030,fffffd806f163e00,0) at sbappendaddr+0x2e9 rtm_sendup(fffffd806f6d6190,fffffd806f163e00,0) at rtm_sendup+0xef route_input(fffffd806f163e00,0,2) at route_input+0x489 rtm_send(fffffd806f3bc690,2,0,0) at rtm_send+0x18d rt_ifa_del(ffff8000009db800,400004,ffff8000009db868,0) at rt_ifa_del+0x3bb in_purgeaddr(ffff8000009db800) at in_purgeaddr+0x114 in_ifdetach(ffff8000009d5000) at in_ifdetach+0x74 if_detach(ffff8000009d5000) at if_detach+0x140 tun_clone_destroy(ffff8000009d5000) at tun_clone_destroy+0x1f2 end trace frame: 0xffff800020f60ca0, count: 0 ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff821f8f5b) at panic+0x15c pool_cache_get(ffffffff82667c68) at pool_cache_get+0x323 pool_get(ffffffff82667c68,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806f6d6190,fffffd806f6d6218,ffffffff822ac030,fffffd806f163e00,0) at sbappendaddr+0x2e9 rtm_sendup(fffffd806f6d6190,fffffd806f163e00,0) at rtm_sendup+0xef route_input(fffffd806f163e00,0,2) at route_input+0x489 rtm_send(fffffd806f3bc690,2,0,0) at rtm_send+0x18d rt_ifa_del(ffff8000009db800,400004,ffff8000009db868,0) at rt_ifa_del+0x3bb in_purgeaddr(ffff8000009db800) at in_purgeaddr+0x114 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(ffff800020f60d20) at spec_close+0x311 VOP_CLOSE(fffffd806e2f2008,7,fffffd807f7bfb40,ffff800020e6c4e8) at VOP_CLOSE+0xc0 vn_closefile(fffffd806d07e698,ffff800020e6c4e8) at vn_closefile+0xd7 fdrop(fffffd806d07e698,ffff800020e6c4e8) at fdrop+0xc2 closef(fffffd806d07e698,ffff800020e6c4e8) at closef+0x11c fdfree(ffff800020e6c4e8) at fdfree+0x101 exit1(ffff800020e6c4e8,0,9,1) at exit1+0x32c postsig(ffff800020e6c4e8,9) at postsig+0x4ed userret(ffff800020e6c4e8) at userret+0x199 syscall(ffff800020f611a0) at syscall+0x55f Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe8570, count: -26