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(fb2f459ddaec192a,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036db4ae0,ffff800016a3d308) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075780,fffffd802fbe4de8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075780,fffffd802fbe4de8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075780,fffffd802fbe4dc8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4d28,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4d08,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4cc8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4ca8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4c48,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4c28,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4c08,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4bc8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4ba8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4b88,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4b48,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4b28,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4b08,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4ae8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4ac8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4a88,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4a48,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe49a8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4968,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4948,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe48e8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe48c8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe48a8,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4888,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4868,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4848,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4788,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd802fbe4748,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036db3f20,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036db3f60,ffffffff81b0c620,ffff800016a3d308) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075780,ffffffff81b0c620,ffff800016a3d308) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81054df0,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd8036426a88) at ip6_mrouter_done+0xb5 sys/netinet6/ip6_mroute.c:531 rip6_detach(fffffd8036426a88) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd8036426a88,0) at soclose+0xb2 sys/kern/uipc_socket.c:292 soo_close(fffffd803616b710,ffff800015a02290) at soo_close+0x40 fdrop(fffffd803616b710,ffff800015a02290) at fdrop+0xc9 sys/kern/kern_descrip.c:1260 closef(fffffd803616b710,ffff800015a02290) at closef+0x118 sys/kern/kern_descrip.c:1244 fdfree(ffff800015a02290) at fdfree+0xf7 sys/kern/kern_descrip.c:1176 exit1(ffff800015a02290,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff800015a02290,ffff800016a3d7a0,ffff800016a3d810) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800016a3d870) at syscall+0x508 Xsyscall(6,1,0,1,0,7f7ffffd8e34) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd8e00, count: -47 ddb> show registers rdi 0xfb2f459ddaec192a rsi 0 rbp 0xffff800016a3c040 rbx 0xffff800000075788 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x1e66ff70ef0ca81a r12 0 r13 0xfffffd802fbe4de8 r14 0 r15 0xfb2f459ddaec192a rip 0xffffffff81054e1b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800016a3c000 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.1) pid=288734 stat=onproc flags process=1008 proc=2000 pri=50, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff800015a03650,0xffffffff822cbdb0 process=0xffff8000ffff6d90 user=0xffff800016a38000, vmspace=0xfffffd803f013110 estcpu=28, cpticks=1, pctcpu=0.2 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 74005 447506 31249 0 2 0 syz-executor.0 74005 409602 31249 0 3 0x4000080 fsleep syz-executor.0 86921 373536 1 0 3 0x100083 ttyin getty 31249 186367 91719 0 3 0x82 nanosleep syz-executor.0 1676 275500 0 0 3 0x14200 bored sosplice 99714 167221 91719 0 3 0x82 nanosleep syz-executor.1 91719 223359 40976 0 3 0x82 kqread syz-fuzzer 91719 19824 40976 0 3 0x4000082 thrsleep syz-fuzzer 91719 53716 40976 0 3 0x4000082 thrsleep syz-fuzzer 91719 142705 40976 0 3 0x4000082 thrsleep syz-fuzzer 91719 351429 40976 0 3 0x4000082 thrsleep syz-fuzzer 91719 469776 40976 0 3 0x4000082 thrsleep syz-fuzzer 91719 501003 40976 0 3 0x4000082 thrsleep syz-fuzzer 91719 9450 40976 0 3 0x4000082 thrsleep syz-fuzzer 40976 417376 94675 0 3 0x10008a pause ksh 94675 254490 34683 0 3 0x92 select sshd 34683 37007 1 0 3 0x80 select sshd 83996 45240 19899 73 3 0x100090 kqread syslogd 19899 465789 1 0 3 0x100082 netio syslogd 46375 85739 1 77 3 0x100090 poll dhclient 94170 297881 1 0 3 0x80 poll dhclient 91967 327182 0 0 2 0x14200 zerothread 15764 227337 0 0 3 0x14200 aiodoned aiodoned 44258 168193 0 0 3 0x14200 syncer update 64514 42445 0 0 3 0x14200 cleaner cleaner 35972 431207 0 0 3 0x14200 reaper reaper 9960 295103 0 0 3 0x14200 pgdaemon pagedaemon 79629 306015 0 0 3 0x14200 bored crynlk 74236 390646 0 0 3 0x14200 bored crypto 83280 442234 0 0 3 0x40014200 acpi0 acpi0 60333 48664 0 0 3 0x14200 bored softnet 17818 226416 0 0 2 0x14200 systqmp 78912 208705 0 0 3 0x14200 bored systq 95707 217833 0 0 3 0x40014200 bored softclock 65617 460589 0 0 3 0x40014200 idle0 97780 302798 0 0 3 0x14200 bored smr 1 359193 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 9532 6422K 7573K 78643K 31434 0 0 pcb 25 9K 11K 78643K 3627 0 0 rtable 115 4K 4K 78643K 1221 0 0 ifaddr 61 16K 19K 78643K 576 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 384 0 0 iov 0 0K 32K 78643K 1006 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1206 76K 77K 78643K 8756 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 87 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 12 0K 1K 78643K 868 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 6 17K 25K 78643K 7929 0 0 sigio 2 0K 0K 78643K 116 0 0 proc 42 30K 54K 78643K 1224 0 0 subproc 32 2K 2K 78643K 59 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 748 0 0 in_multi 33 2K 2K 78643K 271 0 0 ether_multi 1 0K 0K 78643K 40 0 0 mrt 2 0K 0K 78643K 24 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 998 0 0 pfkey data 0 0K 4K 78643K 4 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 98 21K 39K 78643K 19583 0 0 UVM aobj 130 4K 4K 78643K 148 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 307 0 0 NDP 13 0K 0K 78643K 154 0 0 temp 178 2719K 3359K 78643K 27317 0 0 kqueue 0 0K 0K 78643K 72 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 8 0 2 1 0 1 1 0 8 0 inpcbpl 280 3022 0 3013 2 1 1 2 0 8 0 rtentry 112 61 0 16 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 234 0 234 1 1 0 1 0 8 0 tcpcb 544 1095 0 1091 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 9 0 3 1 0 1 1 0 8 0 ppxss 1128 118 0 118 25 24 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 266 0 44 14 0 14 14 0 8 0 art_table 32 267 0 44 2 0 2 2 0 8 0 art_node 16 57 0 16 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 8 1 0 1 1 0 8 0 semapl 112 866 0 856 1 0 1 1 0 8 0 shmpl 112 146 0 18 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 14319 0 12817 49 0 49 49 0 8 0 ffsino 240 14319 0 12817 90 1 89 89 0 8 0 nchpl 144 25519 0 23888 61 0 61 61 0 8 0 uvmvnodes 72 6856 0 0 125 0 125 125 0 8 0 vnodes 200 6856 0 0 361 0 361 361 0 8 0 namei 1024 82454 0 82454 8 7 1 1 0 8 1 scsiplug 64 12 0 12 10 10 0 1 0 8 0 scxspl 192 82783 0 82783 36 35 1 6 0 8 1 plimitpl 152 584 0 577 1 0 1 1 0 8 0 sigapl 432 8107 0 8093 2 0 2 2 0 8 0 futexpl 56 128385 0 128384 6 5 1 1 0 8 0 knotepl 112 1518 0 1499 1 0 1 1 0 8 0 kqueuepl 104 1798 0 1796 1 0 1 1 0 8 0 pipepl 112 4256 0 4237 13 12 1 2 0 8 0 fdescpl 424 8108 0 8093 2 0 2 2 0 8 0 filepl 120 48742 0 48645 6 2 4 5 0 8 1 lockfpl 104 3099 0 3099 6 5 1 1 0 8 1 lockfspl 48 1027 0 1027 6 5 1 1 0 8 1 sessionpl 112 28 0 18 1 0 1 1 0 8 0 pgrppl 48 116 0 106 1 0 1 1 0 8 0 ucredpl 96 11009 0 11002 1 0 1 1 0 8 0 zombiepl 144 8094 0 8093 4 3 1 1 0 8 0 processpl 864 8123 0 8093 4 0 4 4 0 8 0 procpl 632 18490 0 18452 4 0 4 4 0 8 0 sosppl 128 64 0 64 20 20 0 1 0 8 0 sockpl 384 6175 0 6156 9 6 3 4 0 8 1 mcl64k 65536 1006 0 1006 116 112 4 33 0 8 4 mcl16k 16384 18 0 18 13 13 0 1 0 8 0 mcl12k 12288 118 0 118 30 29 1 1 0 8 1 mcl9k 9216 112 0 112 28 27 1 1 0 8 1 mcl8k 8192 118 0 118 25 24 1 1 0 8 1 mcl4k 4096 373 0 373 10 9 1 1 0 8 1 mcl2k2 2112 37 0 37 22 22 0 1 0 8 0 mcl2k 2048 63815 0 63757 29 20 9 18 0 8 1 mtagpl 80 22 0 22 8 8 0 1 0 8 0 mbufpl 256 137623 0 137539 62 56 6 22 0 8 0 bufpl 256 28265 0 21162 445 0 445 445 0 8 0 anonpl 16 718308 0 707434 257 209 48 78 0 62 1 amapchunkpl 152 34543 0 34440 106 97 9 14 0 158 3 amappl16 192 42355 0 41748 245 213 32 52 0 8 1 amappl15 184 521 0 519 2 1 1 1 0 8 0 amappl14 176 575 0 569 1 0 1 1 0 8 0 amappl13 168 3907 0 3904 1 0 1 1 0 8 0 amappl12 160 11 0 8 1 0 1 1 0 8 0 amappl11 152 55 0 44 1 0 1 1 0 8 0 amappl10 144 72 0 71 2 1 1 1 0 8 0 amappl9 136 4043 0 4039 1 0 1 1 0 8 0 amappl8 128 3615 0 3592 1 0 1 1 0 8 0 amappl7 120 40 0 35 1 0 1 1 0 8 0 amappl6 112 57 0 50 1 0 1 1 0 8 0 amappl5 104 212 0 202 1 0 1 1 0 8 0 amappl4 96 12295 0 12262 1 0 1 1 0 8 0 amappl3 88 679 0 669 1 0 1 1 0 8 0 amappl2 80 64558 0 64481 4 2 2 3 0 8 0 amappl1 72 146139 0 145723 26 17 9 19 0 8 0 amappl 80 18815 0 18779 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 64 147 0 18 3 0 3 3 0 8 0 uaddrrnd 24 8108 0 8093 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 8108 0 8093 1 0 1 1 0 8 0 vmmpekpl 168 58720 0 58692 2 0 2 2 0 8 0 vmmpepl 168 938553 0 936799 232 154 78 95 0 357 1 vmsppl 272 8107 0 8093 2 1 1 2 0 8 0 pdppl 4096 16222 0 16186 6 1 5 6 0 8 0 pvpl 32 2200971 0 2186919 571 432 139 207 0 265 21 pmappl 200 8107 0 8093 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 827 0 246 20 2 18 18 0 8 0