kernel: protection fault trap, code=0 Stopped at mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace mrouter6_rtwalk_delete(710e8ac6b4dd307,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd80370b9b30,ffff800017b7da18) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd80370b82a0,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd80370b82a0,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd80370b8260,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8200,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b81a0,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8120,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8100,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b80c0,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b80a0,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8020,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8000,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8040,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8060,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8080,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b80e0,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8140,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8160,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8180,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b81c0,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b81e0,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8220,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8240,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8280,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b82c0,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b82e0,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8360,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8380,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b83a0,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8400,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8440,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8480,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b84a0,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370b8f40,ffffffff81cdc1d0,ffff800017b7da18) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff81cdc1d0,ffff800017b7da18) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81eae860,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd80363d5d88) at ip6_mrouter_done+0xb5 rip6_detach(fffffd80363d5d88) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd80363d5d88,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd8039a4cd20,ffff8000ffff2ee8) at soo_close+0x40 fdrop(fffffd8039a4cd20,ffff8000ffff2ee8) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd8039a4cd20,ffff8000ffff2ee8) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff2ee8) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff2ee8,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff2ee8,ffff800017b7deb0,ffff800017b7df00) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800017b7df80) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7fffff9954) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff9920, count: -47 ddb> show registers rdi 0x710e8ac6b4dd307 rsi 0 rbp 0xffff800017b7c750 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0xec919b8c7c90eeb4 r12 0 r13 0xfffffd80370b82a0 r14 0 r15 0x710e8ac6b4dd307 rip 0xffffffff81eae88b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800017b7c710 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=40408 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2c70,0xffffffff8255c0e8 process=0xffff8000148a2378 user=0xffff800017b79000, vmspace=0xfffffd803f014110 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 62695 154668 29795 0 2 0x2 syz-executor.1 28817 117661 29795 0 3 0x82 nanosleep syz-executor.0 28384 366759 1 0 3 0x100083 ttyin getty 80695 312281 0 0 3 0x14200 bored sosplice 29921 296862 0 0 3 0x14200 acct acct 29795 374302 66375 0 3 0x82 thrsleep syz-fuzzer 29795 407921 66375 0 3 0x4000082 nanosleep syz-fuzzer 29795 87454 66375 0 3 0x4000082 thrsleep syz-fuzzer 29795 414846 66375 0 3 0x4000082 thrsleep syz-fuzzer 29795 484136 66375 0 3 0x4000082 kqread syz-fuzzer 29795 213481 66375 0 3 0x4000082 thrsleep syz-fuzzer 29795 393798 66375 0 3 0x4000082 thrsleep syz-fuzzer 66375 314947 46636 0 3 0x10008a pause ksh 46636 371701 30099 0 3 0x92 select sshd 30099 128293 1 0 3 0x80 select sshd 85892 2523 26688 73 3 0x100090 kqread syslogd 26688 308322 1 0 3 0x100082 netio syslogd 1587 315609 1 77 3 0x100090 poll dhclient 34659 212753 1 0 3 0x80 poll dhclient 10728 61422 0 0 2 0x14200 zerothread 34811 400396 0 0 3 0x14200 aiodoned aiodoned 97979 314307 0 0 3 0x14200 syncer update 55230 476832 0 0 3 0x14200 cleaner cleaner 39850 374942 0 0 3 0x14200 reaper reaper 67834 297065 0 0 3 0x14200 pgdaemon pagedaemon 44068 424436 0 0 3 0x14200 bored crynlk 45880 88320 0 0 3 0x14200 bored crypto 68430 399309 0 0 3 0x40014200 acpi0 acpi0 89216 31343 0 0 3 0x14200 bored softnet 26007 65603 0 0 2 0x14200 systqmp 68361 181056 0 0 3 0x14200 bored systq 10712 305948 0 0 3 0x40014200 bored softclock 50600 171074 0 0 3 0x40014200 idle0 98706 486353 0 0 3 0x14200 bored smr 1 4756 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9566 6498K 14554K 78643K 24711 0 0 pcb 15 8K 8K 78643K 623 0 0 rtable 118 4K 4K 78643K 1852 0 0 ifaddr 74 18K 20K 78643K 678 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 314 0 0 iov 0 0K 24K 78643K 594 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1202 76K 77K 78643K 6422 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 77 0 0 VM map 2 0K 0K 78643K 6 0 0 sem 12 0K 0K 78643K 565 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 5562 0 0 sigio 0 0K 0K 78643K 80 0 0 proc 49 38K 63K 78643K 1589 0 0 subproc 32 2K 2K 78643K 348 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 471 0 0 in_multi 33 2K 2K 78643K 375 0 0 ether_multi 2 0K 0K 78643K 32 0 0 mrt 2 0K 0K 78643K 7 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 108 477K 477K 78643K 108 0 0 exec 0 0K 1K 78643K 952 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 108 22K 31K 78643K 13906 0 0 UVM aobj 130 4K 4K 78643K 147 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 578 0 0 NDP 17 0K 0K 78643K 202 0 0 temp 205 3540K 3617K 78643K 113917 0 0 kqueue 0 0K 0K 78643K 30 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 44 0 37 1 0 1 1 0 8 0 rtpcb 80 283 0 281 1 0 1 1 0 8 0 rtentry 112 218 0 172 2 0 2 2 0 8 0 unpcb 120 1967 0 1959 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 3379 0 3379 1 1 0 1 0 8 0 tcpcb 544 1092 0 1088 1 0 1 1 0 8 0 ipq 40 8 0 8 4 4 0 1 0 8 0 ipqe 40 20 0 20 4 4 0 1 0 8 0 inpcb 280 3109 0 3098 7 6 1 2 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 34 0 30 1 0 1 1 0 8 0 pkpcb 40 12 0 12 6 5 1 1 0 8 1 ppxss 1128 117 0 117 17 16 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 908 0 692 16 2 14 15 0 8 0 art_table 32 909 0 692 2 0 2 2 0 8 0 art_node 16 210 0 168 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 9 2 1 1 1 0 8 0 semapl 112 563 0 553 1 0 1 1 0 8 0 shmpl 112 145 0 17 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 10071 0 8679 46 0 46 46 0 8 0 ffsino 240 10071 0 8679 83 0 83 83 0 8 0 nchpl 144 17907 0 16311 60 0 60 60 0 8 0 uvmvnodes 72 7796 0 0 142 0 142 142 0 8 0 vnodes 208 7796 0 0 411 0 411 411 0 8 0 namei 1024 58550 0 58550 3 2 1 1 0 8 1 vmpool 520 4 0 4 2 2 0 1 0 8 0 scsiplug 64 6 0 6 4 4 0 1 0 8 0 scxspl 192 56143 0 56143 22 21 1 7 0 8 1 plimitpl 152 536 0 529 1 0 1 1 0 8 0 sigapl 432 5681 0 5668 2 0 2 2 0 8 0 futexpl 56 91314 0 91314 3 2 1 1 0 8 1 knotepl 112 1155 0 1136 1 0 1 1 0 8 0 kqueuepl 104 1195 0 1193 1 0 1 1 0 8 0 pipepl 112 3148 0 3129 13 12 1 2 0 8 0 fdescpl 424 5682 0 5668 2 0 2 2 0 8 0 filepl 120 34283 0 34185 11 7 4 6 0 8 1 lockfpl 104 1664 0 1663 1 0 1 1 0 8 0 lockfspl 48 557 0 556 1 0 1 1 0 8 0 sessionpl 112 37 0 27 1 0 1 1 0 8 0 pgrppl 48 85 0 75 1 0 1 1 0 8 0 ucredpl 96 6555 0 6546 1 0 1 1 0 8 0 zombiepl 144 5669 0 5668 3 2 1 1 0 8 0 processpl 864 5698 0 5668 4 0 4 4 0 8 0 procpl 632 12287 0 12251 5 1 4 5 0 8 0 sosppl 128 58 0 58 14 13 1 1 0 8 1 sockpl 384 5427 0 5408 10 7 3 4 0 8 1 mcl64k 65536 950 0 950 77 76 1 33 0 8 1 mcl16k 16384 25 0 25 14 13 1 1 0 8 1 mcl12k 12288 104 0 104 14 13 1 1 0 8 1 mcl9k 9216 75 0 75 16 15 1 1 0 8 1 mcl8k 8192 81 0 81 19 18 1 1 0 8 1 mcl4k 4096 276 0 276 4 3 1 1 0 8 1 mcl2k2 2112 25 0 25 12 11 1 1 0 8 1 mcl2k 2048 62059 0 62016 20 14 6 14 0 8 0 mtagpl 80 164 0 162 4 3 1 1 0 8 0 mbufpl 256 130246 0 130157 48 39 9 22 0 8 1 bufpl 256 22545 0 14735 489 0 489 489 0 8 0 anonpl 16 502841 0 490593 179 121 58 70 0 62 1 amapchunkpl 152 24914 0 24814 74 66 8 29 0 158 3 amappl16 192 26901 0 26177 179 134 45 49 0 8 8 amappl15 184 2435 0 2435 3 3 0 1 0 8 0 amappl14 176 1411 0 1404 1 0 1 1 0 8 0 amappl13 168 708 0 708 3 3 0 1 0 8 0 amappl12 160 1021 0 1018 1 0 1 1 0 8 0 amappl11 152 593 0 581 1 0 1 1 0 8 0 amappl10 144 329 0 328 1 0 1 1 0 8 0 amappl9 136 1012 0 1006 1 0 1 1 0 8 0 amappl8 128 547 0 512 2 0 2 2 0 8 0 amappl7 120 418 0 412 1 0 1 1 0 8 0 amappl6 112 564 0 552 1 0 1 1 0 8 0 amappl5 104 1322 0 1311 1 0 1 1 0 8 0 amappl4 96 5412 0 5380 1 0 1 1 0 8 0 amappl3 88 2463 0 2456 1 0 1 1 0 8 0 amappl2 80 45020 0 44955 3 1 2 3 0 8 0 amappl1 72 107504 0 107099 27 18 9 20 0 8 0 amappl 80 12799 0 12765 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 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 146 0 17 3 0 3 3 0 8 0 uaddrrnd 24 5686 0 5668 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5686 0 5668 1 0 1 1 0 8 0 vmmpekpl 168 36052 0 36025 2 0 2 2 0 8 0 vmmpepl 168 664842 0 663062 318 213 105 105 0 357 20 vmsppl 272 5681 0 5668 2 1 1 2 0 8 0 pdppl 4096 11378 0 11344 6 1 5 6 0 8 0 pvpl 32 1549893 0 1534559 406 262 144 221 0 265 10 pmappl 200 5685 0 5672 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 788 0 171 19 1 18 19 0 8 0