kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Mon Jun 29 08:54:52 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-2.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.42' (ECDSA) to the list of known hosts. 2020/06/29 08:57:47 parsed 1 programs 2020/06/29 08:57:51 executed programs: 0 login: panic: pool_do_get: mbufpl free list modified: page 0xfffffd806d7ca000; item addr 0xfffffd806d7caa00; offset 0x0=0x0 != 0x109e8b3bd45f2bbf Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x18 panic(ffffffff8248ba25) at panic+0x15c pool_do_get(ffffffff828c2ff0,2,ffff800020ed89b8) at pool_do_get+0x439 pool_get(ffffffff828c2ff0,2) at pool_get+0xeb m_gethdr(2,1) at m_gethdr+0x4c rtm_msg1(d,ffff800020ed8ac8) at rtm_msg1+0x6e rtm_addr(d,ffff800000aa2c00) at rtm_addr+0x9b rt_ifa_del(ffff800000aa2c00,200404,ffff800000aa2c58,0) at rt_ifa_del+0x3ed rt_ifa_dellocal(ffff800000aa2c00) at rt_ifa_dellocal+0x149 in_purgeaddr(ffff800000aa2c00) 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: 0xffff800020ed8f90, 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 0xfffffd806d7ca000; item addr 0xfffffd806d7caa00; offset 0x0=0x0 != 0x109e8b3bd45f2bbf ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff8248ba25) at panic+0x15c pool_do_get(ffffffff828c2ff0,2,ffff800020ed89b8) at pool_do_get+0x439 pool_get(ffffffff828c2ff0,2) at pool_get+0xeb m_gethdr(2,1) at m_gethdr+0x4c rtm_msg1(d,ffff800020ed8ac8) at rtm_msg1+0x6e rtm_addr(d,ffff800000aa2c00) at rtm_addr+0x9b rt_ifa_del(ffff800000aa2c00,200404,ffff800000aa2c58,0) at rt_ifa_del+0x3ed rt_ifa_dellocal(ffff800000aa2c00) at rt_ifa_dellocal+0x149 in_purgeaddr(ffff800000aa2c00) 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(ffff800020ed8fa0) at spec_close+0x311 VOP_CLOSE(fffffd806ed751a8,7,fffffd807f7bf6c0,ffff800020ddc008) at VOP_CLOSE+0xc0 vn_closefile(fffffd806cf68600,ffff800020ddc008) at vn_closefile+0xd7 fdrop(fffffd806cf68600,ffff800020ddc008) at fdrop+0xc2 closef(fffffd806cf68600,ffff800020ddc008) at closef+0x11c fdfree(ffff800020ddc008) at fdfree+0x101 exit1(ffff800020ddc008,0,9,1) at exit1+0x32c postsig(ffff800020ddc008,9) at postsig+0x4ed userret(ffff800020ddc008) at userret+0x199 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffea360, count: -24 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020ed8800 rbx 0xffff800020ed88b0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8151256f kprintf+0x16f r9 0x1 r10 0x2 r11 0x35fbffdf38a7e645 r12 0x3000000008 r13 0xffff800020ed8810 r14 0x100 r15 0x1 rip 0xffffffff81f0cec8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020ed87f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=23966 stat=onproc flags process=a proc=2000 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020ddd118,0xffffffff828d88c0 process=0xffff800020df07c0 user=0xffff800020ed4000, vmspace=0xfffffd807f000730 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 64771 57737 18361 0 3 0x82 thrsleep syz-execprog 64771 249185 18361 0 3 0x4000082 thrsleep syz-execprog 64771 412986 18361 0 3 0x4000082 thrsleep syz-execprog 64771 24756 18361 0 3 0x4000082 thrsleep syz-execprog 64771 174372 18361 0 3 0x4000082 kqread syz-execprog 64771 388238 18361 0 3 0x4000082 wait syz-execprog 64771 288515 18361 0 3 0x4000082 thrsleep syz-execprog 64771 339661 18361 0 3 0x4000082 thrsleep syz-execprog 64771 393058 18361 0 3 0x4000082 thrsleep syz-execprog 18361 298798 50700 0 3 0x10008a pause ksh 50700 319652 80847 0 3 0x92 select sshd 92497 102480 1 0 3 0x100083 ttyin getty 80847 294021 1 0 3 0x80 select sshd 37821 38213 21088 74 3 0x100092 bpf pflogd 21088 14876 1 0 3 0x80 netio pflogd 25705 200280 48407 73 3 0x100090 kqread syslogd 48407 377789 1 0 3 0x100082 netio syslogd 2368 82804 1 77 3 0x100090 poll dhclient 8401 226411 1 0 3 0x80 poll dhclient 14453 161824 0 0 3 0x14200 bored smr 60259 339368 0 0 3 0x14200 pgzero zerothread 30963 333400 0 0 3 0x14200 aiodoned aiodoned 30538 192057 0 0 3 0x14200 syncer update 43623 192918 0 0 3 0x14200 cleaner cleaner 69479 55847 0 0 3 0x14200 reaper reaper 48072 490863 0 0 3 0x14200 pgdaemon pagedaemon 5156 142576 0 0 3 0x14200 bored crynlk 39485 75677 0 0 3 0x14200 bored crypto 49839 297774 0 0 3 0x40014200 acpi0 acpi0 8915 251111 0 0 3 0x40014200 idle1 77190 87232 0 0 3 0x14200 bored softnet 36178 308372 0 0 3 0x14200 bored systqmp 63152 293797 0 0 3 0x14200 bored systq 54954 72651 0 0 3 0x40014200 bored softclock 32650 147292 0 0 7 0x40014200 idle0 1 4559 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 (0xffffffff828c3000) #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 iov 0 0K 0K 78643K 1 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 951 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 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 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 7 2 1 1 1 0 8 0 pfstkey 112 11 0 7 2 1 1 1 0 8 0 pfstate 328 11 0 7 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 2 9 0 9 9 0 8 0 art_table 32 145 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 4639 0 4639 14 13 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 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 80 0 0 10 0 10 10 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 121 0 0 7 0 7 7 0 8 0 mbufpl: pool(0xffffffff828c2ff0:mbufpl): free list modified: page 0xfffffd806d7ca000; item ordinal 0; addr 0xfffffd806d7caa00 (p 0xfffffd806e4b9000); offset 0x0=0x0 mbufpl: pool(0xffffffff828c2ff0:mbufpl): page inconsistency: page 0xfffffd806d7ca000; item ordinal 1; addr 0xfffffd7c6e5720dc bufpl 280 3049 0 133 209 0 209 209 0 8 0 anonpl 16 22512 0 20880 14 2 12 12 0 124 4 amapchunkpl 152 777 0 715 4 0 4 4 0 158 1 amappl16 192 153 0 119 3 0 3 3 0 8 0 amappl15 184 9 0 8 2 1 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 7 0 7 2 1 1 1 0 8 1 amappl11 152 55 0 39 1 0 1 1 0 8 0 amappl10 144 20 0 17 1 0 1 1 0 8 0 amappl9 136 231 0 230 1 0 1 1 0 8 0 amappl8 128 274 0 263 1 0 1 1 0 8 0 amappl7 120 112 0 102 1 0 1 1 0 8 0 amappl6 112 26 0 22 2 1 1 1 0 8 0 amappl5 104 133 0 119 1 0 1 1 0 8 0 amappl4 96 494 0 468 1 0 1 1 0 8 0 amappl3 88 105 0 100 1 0 1 1 0 8 0 amappl2 80 914 0 857 3 1 2 2 0 8 0 amappl1 72 15543 0 15123 23 5 18 18 0 8 8 amappl 80 476 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 6399 0 6371 2 0 2 2 0 8 0 vmmpepl 168 32745 0 31822 81 8 73 73 0 357 30 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 114049 0 110045 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 112 234 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(ffffffff826eaff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828c2938) at __mp_lock+0x127 softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffffffff826eaff0) at sched_idle+0x3f7 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff826eaff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828c2938) at __mp_lock+0x127 softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffffffff826eaff0) 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(ffffffff8248ba25) at panic+0x15c pool_do_get(ffffffff828c2ff0,2,ffff800020ed89b8) at pool_do_get+0x439 pool_get(ffffffff828c2ff0,2) at pool_get+0xeb m_gethdr(2,1) at m_gethdr+0x4c rtm_msg1(d,ffff800020ed8ac8) at rtm_msg1+0x6e rtm_addr(d,ffff800000aa2c00) at rtm_addr+0x9b rt_ifa_del(ffff800000aa2c00,200404,ffff800000aa2c58,0) at rt_ifa_del+0x3ed rt_ifa_dellocal(ffff800000aa2c00) at rt_ifa_dellocal+0x149 in_purgeaddr(ffff800000aa2c00) 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: 0xffff800020ed8f90, count: 0 ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff8248ba25) at panic+0x15c pool_do_get(ffffffff828c2ff0,2,ffff800020ed89b8) at pool_do_get+0x439 pool_get(ffffffff828c2ff0,2) at pool_get+0xeb m_gethdr(2,1) at m_gethdr+0x4c rtm_msg1(d,ffff800020ed8ac8) at rtm_msg1+0x6e rtm_addr(d,ffff800000aa2c00) at rtm_addr+0x9b rt_ifa_del(ffff800000aa2c00,200404,ffff800000aa2c58,0) at rt_ifa_del+0x3ed rt_ifa_dellocal(ffff800000aa2c00) at rt_ifa_dellocal+0x149 in_purgeaddr(ffff800000aa2c00) 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(ffff800020ed8fa0) at spec_close+0x311 VOP_CLOSE(fffffd806ed751a8,7,fffffd807f7bf6c0,ffff800020ddc008) at VOP_CLOSE+0xc0 vn_closefile(fffffd806cf68600,ffff800020ddc008) at vn_closefile+0xd7 fdrop(fffffd806cf68600,ffff800020ddc008) at fdrop+0xc2 closef(fffffd806cf68600,ffff800020ddc008) at closef+0x11c fdfree(ffff800020ddc008) at fdfree+0x101 exit1(ffff800020ddc008,0,9,1) at exit1+0x32c postsig(ffff800020ddc008,9) at postsig+0x4ed userret(ffff800020ddc008) at userret+0x199 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffea360, count: -24