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(d5df16a0534b326f,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d65b60,ffff800016b22508) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d641a0,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d641a0,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d64160,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64140,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64100,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d640e0,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d640a0,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64080,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64060,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64040,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64020,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64000,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d640c0,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64120,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64180,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d641c0,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64280,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d642c0,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64300,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64360,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d643c0,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64420,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64440,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d644a0,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d644e0,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64520,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64540,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64560,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64580,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d645a0,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64620,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64660,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64f60,ffffffff81cdc1d0,ffff800016b22508) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff81cdc1d0,ffff800016b22508) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81eae860,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd80363e2d88) at ip6_mrouter_done+0xb5 rip6_detach(fffffd80363e2d88) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd80363e2d88,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd803622da58,ffff8000ffff38c8) at soo_close+0x40 fdrop(fffffd803622da58,ffff8000ffff38c8) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd803622da58,ffff8000ffff38c8) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff38c8) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff38c8,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff38c8,ffff800016b229a0,ffff800016b229f0) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800016b22a70) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffd3c24) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd3bf0, count: -47 ddb> show registers rdi 0xd5df16a0534b326f rsi 0 rbp 0xffff800016b21240 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0xb1b2446a0e73c61d r12 0 r13 0xfffffd8036d641a0 r14 0 r15 0xd5df16a0534b326f rip 0xffffffff81eae88b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800016b21200 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=520603 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2ee8,0xffffffff8255c0e8 process=0xffff8000148a2378 user=0xffff800016b1d000, vmspace=0xfffffd803f014cc0 estcpu=26, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 60834 339951 40943 0 2 0x2 syz-executor.1 49651 124728 40943 0 3 0x82 nanosleep syz-executor.0 77548 179600 1 0 3 0x100083 ttyin getty 91955 332793 0 0 3 0x14200 bored sosplice 40943 3188 33924 0 3 0x82 thrsleep syz-fuzzer 40943 221757 33924 0 3 0x4000082 nanosleep syz-fuzzer 40943 444473 33924 0 3 0x4000082 thrsleep syz-fuzzer 40943 168494 33924 0 3 0x4000082 thrsleep syz-fuzzer 40943 275208 33924 0 3 0x4000082 kqread syz-fuzzer 40943 286738 33924 0 3 0x4000082 thrsleep syz-fuzzer 40943 294893 33924 0 3 0x4000082 thrsleep syz-fuzzer 40943 258909 33924 0 3 0x4000082 thrsleep syz-fuzzer 33924 71959 93775 0 3 0x10008a pause ksh 93775 231392 42891 0 3 0x92 select sshd 42891 381683 1 0 3 0x80 select sshd 41068 357098 41341 73 3 0x100090 kqread syslogd 41341 220360 1 0 3 0x100082 netio syslogd 10000 51147 1 77 3 0x100090 poll dhclient 59632 278621 1 0 3 0x80 poll dhclient 27248 216158 0 0 2 0x14200 zerothread 63007 74297 0 0 3 0x14200 aiodoned aiodoned 8570 352735 0 0 3 0x14200 syncer update 35232 304815 0 0 3 0x14200 cleaner cleaner 66599 224826 0 0 3 0x14200 reaper reaper 29058 217000 0 0 3 0x14200 pgdaemon pagedaemon 74715 399266 0 0 3 0x14200 bored crynlk 12935 183688 0 0 3 0x14200 bored crypto 46300 106746 0 0 3 0x40014200 acpi0 acpi0 2096 368900 0 0 3 0x14200 bored softnet 67242 512513 0 0 2 0x14200 systqmp 49347 353351 0 0 3 0x14200 bored systq 741 101375 0 0 3 0x40014200 bored softclock 31446 403990 0 0 3 0x40014200 idle0 52232 140426 0 0 3 0x14200 bored smr 1 130564 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 9551 6367K 14689K 78643K 32744 0 0 pcb 15 8K 8K 78643K 1003 0 0 rtable 117 12K 12K 78643K 2752 0 0 ifaddr 71 18K 19K 78643K 963 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 492 0 0 iov 0 0K 28K 78643K 847 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1205 76K 77K 78643K 9094 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 9K 78643K 127 0 0 VM map 2 0K 0K 78643K 18 0 0 sem 12 1K 1K 78643K 311 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 8502 0 0 sigio 0 0K 0K 78643K 125 0 0 proc 49 38K 55K 78643K 2185 0 0 subproc 32 2K 2K 78643K 520 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 679 0 0 in_multi 33 2K 2K 78643K 597 0 0 ether_multi 2 0K 0K 78643K 46 0 0 mrt 2 0K 0K 78643K 21 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 102 450K 450K 78643K 102 0 0 exec 0 0K 1K 78643K 1342 0 0 pfkey data 0 0K 0K 78643K 2 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 20969 0 0 UVM aobj 130 4K 4K 78643K 150 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 974 0 0 NDP 16 0K 1K 78643K 301 0 0 temp 198 3540K 3620K 78643K 161182 0 0 kqueue 0 0K 0K 78643K 71 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 68 0 62 1 0 1 1 0 8 0 rtpcb 80 409 0 407 1 0 1 1 0 8 0 rtentry 112 344 0 300 2 0 2 2 0 8 0 unpcb 120 2931 0 2923 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 3829 0 3829 1 1 0 1 0 8 0 tcpcb 544 1603 0 1599 1 0 1 1 0 8 0 ipq 40 11 0 11 5 5 0 1 0 8 0 ipqe 40 28 0 28 5 5 0 1 0 8 0 inpcb 280 4614 0 4605 13 12 1 2 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 60 0 56 1 0 1 1 0 8 0 pkpcb 40 42 0 42 16 16 0 1 0 8 0 swfcl 56 5 0 0 1 0 1 1 0 8 0 ppxss 1128 155 0 155 29 28 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1480 0 1265 15 1 14 14 0 8 0 art_table 32 1481 0 1265 2 0 2 2 0 8 0 art_node 16 331 0 290 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 9 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 309 0 299 1 0 1 1 0 8 0 shmpl 112 148 0 20 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 14614 0 13219 46 0 46 46 0 8 0 ffsino 240 14614 0 13219 83 0 83 83 0 8 0 nchpl 144 26494 0 24897 60 0 60 60 0 8 0 uvmvnodes 72 8800 0 0 160 0 160 160 0 8 0 vnodes 208 8800 0 0 464 0 464 464 0 8 0 namei 1024 87698 0 87698 7 6 1 1 0 8 1 vmpool 520 16 0 16 6 6 0 1 0 8 0 scsiplug 64 15 0 15 8 8 0 1 0 8 0 scxspl 192 89480 0 89480 23 22 1 7 0 8 1 plimitpl 152 782 0 775 1 0 1 1 0 8 0 sigapl 432 8590 0 8577 2 0 2 2 0 8 0 futexpl 56 142259 0 142259 8 7 1 1 0 8 1 knotepl 112 2109 0 2090 1 0 1 1 0 8 0 kqueuepl 104 2011 0 2009 1 0 1 1 0 8 0 pipepl 112 4414 0 4395 6 5 1 2 0 8 0 fdescpl 424 8591 0 8577 2 0 2 2 0 8 0 filepl 120 51801 0 51704 11 7 4 5 0 8 1 lockfpl 104 2723 0 2722 1 0 1 1 0 8 0 lockfspl 48 921 0 920 1 0 1 1 0 8 0 sessionpl 112 46 0 36 1 0 1 1 0 8 0 pgrppl 48 128 0 118 1 0 1 1 0 8 0 ucredpl 96 9806 0 9797 1 0 1 1 0 8 0 zombiepl 144 8582 0 8581 2 1 1 1 0 8 0 processpl 864 8610 0 8581 4 0 4 4 0 8 0 procpl 632 18858 0 18822 4 0 4 4 0 8 0 sosppl 128 91 0 91 27 27 0 1 0 8 0 sockpl 384 8086 0 8067 14 11 3 4 0 8 1 mcl64k 65536 531 0 531 57 57 0 32 0 8 0 mcl16k 16384 35 0 35 20 20 0 1 0 8 0 mcl12k 12288 168 0 168 22 22 0 1 0 8 0 mcl9k 9216 101 0 101 29 28 1 1 0 8 1 mcl8k 8192 142 0 142 24 24 0 1 0 8 0 mcl4k 4096 476 0 476 13 12 1 1 0 8 1 mcl2k2 2112 29 0 29 20 20 0 1 0 8 0 mcl2k 2048 69061 0 69013 22 15 7 16 0 8 0 mtagpl 80 268 0 258 4 3 1 1 0 8 0 mbufpl 256 156655 0 156558 46 38 8 23 0 8 0 bufpl 256 28382 0 19582 551 0 551 551 0 8 0 anonpl 16 762465 0 750751 237 179 58 70 0 62 0 amapchunkpl 152 39432 0 39329 139 129 10 29 0 158 5 amappl16 192 43072 0 42360 246 209 37 48 0 8 1 amappl15 184 1699 0 1699 6 6 0 1 0 8 0 amappl14 176 946 0 942 1 0 1 1 0 8 0 amappl13 168 2073 0 2071 3 2 1 1 0 8 0 amappl12 160 1033 0 1032 1 0 1 1 0 8 0 amappl11 152 637 0 627 1 0 1 1 0 8 0 amappl10 144 978 0 977 2 1 1 1 0 8 0 amappl9 136 1559 0 1550 1 0 1 1 0 8 0 amappl8 128 1185 0 1151 2 0 2 2 0 8 0 amappl7 120 1126 0 1119 1 0 1 1 0 8 0 amappl6 112 618 0 608 1 0 1 1 0 8 0 amappl5 104 1781 0 1768 1 0 1 1 0 8 0 amappl4 96 9062 0 9032 1 0 1 1 0 8 0 amappl3 88 950 0 944 1 0 1 1 0 8 0 amappl2 80 69701 0 69633 3 1 2 3 0 8 0 amappl1 72 159463 0 159051 27 18 9 20 0 8 0 amappl 80 19548 0 19513 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 64 149 0 20 3 0 3 3 0 8 0 uaddrrnd 24 8607 0 8577 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 8607 0 8577 1 0 1 1 0 8 0 vmmpekpl 168 51318 0 51290 2 0 2 2 0 8 0 vmmpepl 168 1001724 0 999949 446 346 100 106 0 357 15 vmsppl 272 8590 0 8577 5 4 1 2 0 8 0 pdppl 4096 17220 0 17186 6 1 5 6 0 8 0 pvpl 32 2206646 0 2191843 651 506 145 274 0 265 11 pmappl 200 8606 0 8593 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 856 0 180 20 0 20 20 0 8 0