kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Thu May 7 20:52:00 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-3.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.68' (ECDSA) to the list of known hosts. 2020/05/07 20:52:14 parsed 1 programs 2020/05/07 20:52:19 executed programs: 0 login: panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f315a00+16 0x0!=0x844b09959a9fdf46 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *496470 63602 0 0x14000 0x40000200 0K softclock db_enter() at db_enter+0x18 panic(ffffffff821f7274) at panic+0x15c pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 pool_get(ffffffff82691c90,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806f6d6000,fffffd806f6d6088,ffffffff8233f960,fffffd8075ed5f00,0) at sbappendaddr+0x2e9 rtm_sendup(fffffd806f6d6000,fffffd8075ed5f00,0) at rtm_sendup+0xef route_input(fffffd8075ed5f00,0,18) at route_input+0x489 rtm_addr(14,ffff8000009db500) at rtm_addr+0x10b nd6_dad_timer(ffff8000009db500) at nd6_dad_timer+0x2f9 timeout_run(ffff800000a22430) at timeout_run+0xc4 softclock_thread(ffff800020e18ea0) at softclock_thread+0x16a end trace frame: 0x0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f315a00+16 0x0!=0x844b09959a9fdf46 ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff821f7274) at panic+0x15c pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 pool_get(ffffffff82691c90,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806f6d6000,fffffd806f6d6088,ffffffff8233f960,fffffd8075ed5f00,0) at sbappendaddr+0x2e9 rtm_sendup(fffffd806f6d6000,fffffd8075ed5f00,0) at rtm_sendup+0xef route_input(fffffd8075ed5f00,0,18) at route_input+0x489 rtm_addr(14,ffff8000009db500) at rtm_addr+0x10b nd6_dad_timer(ffff8000009db500) at nd6_dad_timer+0x2f9 timeout_run(ffff800000a22430) at timeout_run+0xc4 softclock_thread(ffff800020e18ea0) at softclock_thread+0x16a end trace frame: 0x0, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e26fb0 rbx 0xffff800020e27060 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81ce7e0f kprintf+0x16f r9 0x1 r10 0x10129fb42c8a8a2b r11 0x6dd69f0edd699114 r12 0x3000000008 r13 0xffff800020e26fc0 r14 0x100 r15 0x1 rip 0xffffffff815014f8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e26fa0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (softclock) pid=496470 stat=onproc flags process=14000 proc=40000200 pri=0, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e19110,0xffff800020e189d0 process=0xffff800020e1a000 user=0xffff800020e22000, vmspace=0xffffffff82690068 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 61886 247920 8243 0 3 0x82 nanosleep syz-executor.0 8243 355392 34330 0 3 0x82 thrsleep syz-execprog 8243 61594 34330 0 2 0x4000482 syz-execprog 8243 7156 34330 0 3 0x4000082 nanosleep syz-execprog 8243 9546 34330 0 3 0x4000082 thrsleep syz-execprog 8243 107578 34330 0 3 0x4000082 thrsleep syz-execprog 8243 199879 34330 0 3 0x4000082 thrsleep syz-execprog 8243 503349 34330 0 3 0x4000082 thrsleep syz-execprog 8243 125957 34330 0 3 0x4000082 thrsleep syz-execprog 8243 119824 34330 0 3 0x4000082 kqread syz-execprog 34330 321912 50807 0 3 0x10008a pause ksh 50807 346345 19748 0 3 0x92 select sshd 20626 278825 1 0 3 0x100083 ttyin getty 19748 36646 1 0 3 0x80 select sshd 88257 356461 40764 74 3 0x100092 bpf pflogd 40764 285383 1 0 3 0x80 netio pflogd 2049 438086 88893 73 3 0x100090 kqread syslogd 88893 245634 1 0 3 0x100082 netio syslogd 78829 217440 1 77 3 0x100090 poll dhclient 83345 275869 1 0 3 0x80 poll dhclient 60872 219774 0 0 3 0x14200 bored smr 34567 36810 0 0 3 0x14200 pgzero zerothread 19013 75873 0 0 3 0x14200 aiodoned aiodoned 30859 418603 0 0 3 0x14200 syncer update 78149 71779 0 0 3 0x14200 cleaner cleaner 6466 25319 0 0 3 0x14200 reaper reaper 46251 199915 0 0 3 0x14200 pgdaemon pagedaemon 98925 36992 0 0 3 0x14200 bored crynlk 87834 382877 0 0 3 0x14200 bored crypto 30920 6116 0 0 3 0x40014200 acpi0 acpi0 25626 377053 0 0 7 0x40014200 idle1 29633 322997 0 0 3 0x14200 bored softnet 17834 232486 0 0 3 0x14200 bored systqmp 67670 489129 0 0 3 0x14200 bored systq *63602 496470 0 0 7 0x40014200 softclock 72471 152896 0 0 3 0x40014200 idle0 1 131247 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 63602 (softclock) thread 0xffff800020e18ea0 (496470) exclusive rwlock netlock r = 0 (0xffffffff824fd5a8) #0 witness_lock+0x4c7 #1 nd6_dad_timer+0x34 #2 timeout_run+0xc4 #3 softclock_thread+0x16a #4 proc_trampoline+0x1c shared rwlock timeout r = 0 (0xffffffff8248ec50) #0 witness_lock+0x4c7 #1 timeout_run+0xb9 #2 softclock_thread+0x16a #3 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82662e18) #0 witness_lock+0x4c7 #1 __mp_acquire_count+0x51 #2 mi_switch+0x392 #3 sleep_finish+0x113 #4 softclock_thread+0x103 #5 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9466 6395K 6395K 78643K 10557 0 pcb 13 8K 8K 78643K 13 0 rtable 83 2K 2K 78643K 163 0 ifaddr 37 9K 9K 78643K 82 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 61 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 72 12K 12K 78643K 988 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 6 0K 0K 78643K 7 0 temp 29 3033K 3097K 78643K 1953 0 kqueue 3 4K 4K 78643K 3 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 77 0 71 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 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1467 0 65 88 0 88 88 0 8 0 ffsino 272 1467 0 65 94 0 94 94 0 8 0 nchpl 144 1726 0 125 60 0 60 60 0 8 0 uvmvnodes 72 1477 0 0 27 0 27 27 0 8 0 vnodes 208 1477 0 0 78 0 78 78 0 8 0 namei 1024 4376 0 4376 1 0 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 4096 0 4096 2 1 1 2 0 8 1 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 284 0 255 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 pipelkpl 48 77 0 70 1 0 1 1 0 8 0 pipepl 120 154 0 141 1 0 1 1 0 8 0 fdescpl 496 269 0 255 3 0 3 3 0 8 0 filepl 152 1195 0 1137 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 144 255 0 254 1 0 1 1 0 8 0 processpl 984 284 0 254 5 0 5 5 0 8 1 procpl 624 292 0 254 4 0 4 4 0 8 1 sockpl 400 123 0 105 2 0 2 2 0 8 0 mcl4k 4096 1 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 256 106 0 0 7 0 7 7 0 8 0 bufpl 280 3024 0 133 207 0 207 207 0 8 0 anonpl 16 23672 0 21706 13 1 12 12 0 124 3 amapchunkpl 152 815 0 750 4 0 4 4 0 158 0 amappl16 192 350 0 296 3 0 3 3 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 31 0 26 1 0 1 1 0 8 0 amappl13 168 20 0 19 1 0 1 1 0 8 0 amappl12 160 14 0 11 1 0 1 1 0 8 0 amappl11 152 99 0 83 1 0 1 1 0 8 0 amappl10 144 18 0 15 1 0 1 1 0 8 0 amappl9 136 231 0 230 1 0 1 1 0 8 0 amappl8 128 273 0 265 1 0 1 1 0 8 0 amappl7 120 115 0 104 1 0 1 1 0 8 0 amappl6 112 65 0 63 2 1 1 1 0 8 0 amappl5 104 168 0 154 1 0 1 1 0 8 0 amappl4 96 496 0 470 1 0 1 1 0 8 0 amappl3 88 105 0 100 1 0 1 1 0 8 0 amappl2 80 972 0 915 2 0 2 2 0 8 0 amappl1 72 15877 0 15456 23 5 18 18 0 8 8 amappl 80 520 0 492 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 24 269 0 255 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 269 0 255 1 0 1 1 0 8 0 vmmpekpl 168 6426 0 6404 2 0 2 2 0 8 0 vmmpepl 168 34381 0 33438 79 7 72 72 0 357 29 vmsppl 368 268 0 255 2 0 2 2 0 8 0 pdppl 4096 546 0 510 6 0 6 6 0 8 0 pvpl 32 118677 0 114354 104 0 104 104 0 265 69 pmappl 232 268 0 255 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 233 0 3 7 0 7 7 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff821f7274) at panic+0x15c pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 pool_get(ffffffff82691c90,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c sbappendaddr(fffffd806f6d6000,fffffd806f6d6088,ffffffff8233f960,fffffd8075ed5f00,0) at sbappendaddr+0x2e9 rtm_sendup(fffffd806f6d6000,fffffd8075ed5f00,0) at rtm_sendup+0xef route_input(fffffd8075ed5f00,0,18) at route_input+0x489 rtm_addr(14,ffff8000009db500) at rtm_addr+0x10b nd6_dad_timer(ffff8000009db500) at nd6_dad_timer+0x2f9 timeout_run(ffff800000a22430) at timeout_run+0xc4 softclock_thread(ffff800020e18ea0) at softclock_thread+0x16a end trace frame: 0x0, count: -12 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffff800020e00ff0) at sched_idle+0x3f7 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffff800020e00ff0) at sched_idle+0x3f7 end trace frame: 0x0, count: -5 ddb{1}>