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(728ad5210d90d672,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d73a90,ffff80001533db28) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d723c0,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d723c0,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d72340,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72300,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72280,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72240,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72220,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d721a0,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72180,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72140,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72120,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d720a0,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72060,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72000,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72020,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72040,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72080,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d720c0,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d720e0,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72100,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72160,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d721c0,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d721e0,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72200,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72260,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d722a0,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d722c0,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d722e0,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72320,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72360,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72380,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d723a0,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72f60,ffffffff82138a50,ffff80001533db28) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff82138a50,ffff80001533db28) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81175a00,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd803703b300) at ip6_mrouter_done+0xb5 rip6_detach(fffffd803703b300) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd803703b300,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd802ed22bc8,ffff800015341160) at soo_close+0x40 fdrop(fffffd802ed22bc8,ffff800015341160) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802ed22bc8,ffff800015341160) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff800015341160) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff800015341160,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff800015341160,ffff80001533dfc0,ffff80001533e010) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff80001533e090) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffcd484) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcd450, count: -47 ddb> show registers rdi 0x728ad5210d90d672 rsi 0 rbp 0xffff80001533c860 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x39a7c0bb3508880a r12 0 r13 0xfffffd8036d723c0 r14 0 r15 0x728ad5210d90d672 rip 0xffffffff81175a2b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001533c820 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.1) pid=447992 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800015340c70,0xffffffff8256a900 process=0xffff8000148a30f8 user=0xffff800015339000, vmspace=0xfffffd803f014550 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 57310 283371 36299 0 3 0x82 nanosleep syz-executor.1 73268 66302 1 0 3 0x100083 ttyin getty 14865 5514 36299 0 3 0x82 nanosleep syz-executor.0 24833 379365 0 0 3 0x14200 bored sosplice 36299 271352 17238 0 3 0x82 thrsleep syz-fuzzer 36299 503687 17238 0 3 0x4000082 nanosleep syz-fuzzer 36299 422306 17238 0 3 0x4000082 thrsleep syz-fuzzer 36299 335246 17238 0 3 0x4000082 thrsleep syz-fuzzer 36299 325629 17238 0 3 0x4000082 thrsleep syz-fuzzer 36299 437604 17238 0 3 0x4000082 kqread syz-fuzzer 36299 150057 17238 0 3 0x4000082 thrsleep syz-fuzzer 17238 212313 22909 0 3 0x10008a pause ksh 22909 268965 56230 0 3 0x92 select sshd 56230 477951 1 0 3 0x80 select sshd 93366 497439 21691 73 3 0x100090 kqread syslogd 21691 373509 1 0 3 0x100082 netio syslogd 10915 1851 1 77 3 0x100090 poll dhclient 25288 181934 1 0 3 0x80 poll dhclient 49160 520791 0 0 2 0x14200 zerothread 42000 8943 0 0 3 0x14200 aiodoned aiodoned 93971 179775 0 0 3 0x14200 syncer update 66793 238547 0 0 3 0x14200 cleaner cleaner 76469 317090 0 0 3 0x14200 reaper reaper 13347 494852 0 0 3 0x14200 pgdaemon pagedaemon 69845 257643 0 0 3 0x14200 bored crynlk 46700 275091 0 0 3 0x14200 bored crypto 20788 176323 0 0 3 0x40014200 acpi0 acpi0 36701 328798 0 0 3 0x14200 bored softnet 81175 256589 0 0 2 0x14200 systqmp 71477 421543 0 0 3 0x14200 bored systq 86496 259311 0 0 3 0x40014200 bored softclock 75730 317296 0 0 3 0x40014200 idle0 40786 12289 0 0 3 0x14200 bored smr 1 157216 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 9550 6739K 6913K 78643K 15046 0 0 pcb 15 8K 8K 78643K 226 0 0 rtable 120 12K 12K 78643K 662 0 0 ifaddr 60 13K 14K 78643K 200 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 119 0 0 iov 0 0K 20K 78643K 217 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1218 77K 77K 78643K 3029 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 33 0 0 VM map 2 0K 0K 78643K 6 0 0 sem 12 0K 0K 78643K 204 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 2109 0 0 sigio 0 0K 0K 78643K 49 0 0 proc 49 38K 62K 78643K 721 0 0 subproc 32 2K 2K 78643K 119 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 187 0 0 in_multi 33 2K 2K 78643K 143 0 0 ether_multi 2 0K 0K 78643K 11 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 90 397K 397K 78643K 90 0 0 exec 0 0K 1K 78643K 398 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 93 21K 30K 78643K 5775 0 0 UVM aobj 90 3K 3K 78643K 105 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 209 0 0 NDP 13 0K 0K 78643K 60 0 0 temp 177 3535K 3663K 78643K 18911 0 0 kqueue 0 0K 0K 78643K 20 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 16 0 10 1 0 1 1 0 8 0 rtpcb 80 110 0 108 1 0 1 1 0 8 0 rtentry 112 96 0 51 2 0 2 2 0 8 0 unpcb 120 614 0 606 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 1841 0 1841 2 2 0 1 0 8 0 tcpcb 544 377 0 373 1 0 1 1 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 8 0 8 1 1 0 1 0 8 0 inpcb 280 1065 0 1054 7 5 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 12 0 8 1 0 1 1 0 8 0 pkpcb 40 6 0 6 3 3 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 23 0 23 8 7 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 405 0 187 19 5 14 14 0 8 0 art_table 32 406 0 187 2 0 2 2 0 8 0 art_node 16 90 0 49 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 16 2 2 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 202 0 192 1 0 1 1 0 8 0 shmpl 112 103 0 15 4 1 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 4802 0 3410 46 0 46 46 0 8 0 ffsino 240 4802 0 3410 83 0 83 83 0 8 0 nchpl 144 8028 0 6435 60 0 60 60 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 23974 0 23974 2 1 1 1 0 8 1 vmpool 520 4 0 4 1 1 0 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 23247 0 23247 14 13 1 7 0 8 1 plimitpl 152 189 0 182 1 0 1 1 0 8 0 sigapl 432 2268 0 2255 2 0 2 2 0 8 0 futexpl 56 33054 0 33054 1 0 1 1 0 8 1 knotepl 112 513 0 494 1 0 1 1 0 8 0 kqueuepl 104 441 0 439 1 0 1 1 0 8 0 pipepl 112 1260 0 1241 2 0 2 2 0 8 0 fdescpl 424 2269 0 2255 2 0 2 2 0 8 0 filepl 120 12855 0 12758 5 1 4 5 0 8 1 lockfpl 104 1052 0 1051 1 0 1 1 0 8 0 lockfspl 48 313 0 312 1 0 1 1 0 8 0 sessionpl 112 25 0 15 1 0 1 1 0 8 0 pgrppl 48 37 0 27 1 0 1 1 0 8 0 ucredpl 96 2097 0 2090 1 0 1 1 0 8 0 zombiepl 144 2261 0 2259 2 1 1 1 0 8 0 processpl 864 2289 0 2259 4 0 4 4 0 8 0 procpl 632 4843 0 4807 4 0 4 4 0 8 0 sosppl 128 19 0 19 6 6 0 1 0 8 0 sockpl 384 1810 0 1791 6 3 3 4 0 8 1 mcl64k 65536 1083 0 1083 73 72 1 65 0 8 1 mcl16k 16384 9 0 9 5 4 1 1 0 8 1 mcl12k 12288 32 0 32 7 6 1 1 0 8 1 mcl9k 9216 23 0 23 8 7 1 1 0 8 1 mcl8k 8192 24 0 24 7 6 1 1 0 8 1 mcl4k 4096 114 0 114 5 4 1 1 0 8 1 mcl2k2 2112 13 0 13 4 4 0 1 0 8 0 mcl2k 2048 61412 0 61368 18 11 7 15 0 8 1 mtagpl 80 40 0 38 2 1 1 1 0 8 0 mbufpl 256 108854 0 108765 70 63 7 37 0 8 0 bufpl 256 11877 0 6092 363 0 363 363 0 8 0 anonpl 16 204088 0 193403 109 55 54 68 0 62 0 amapchunkpl 152 9486 0 9383 21 14 7 9 0 158 2 amappl16 192 11036 0 10339 95 58 37 48 0 8 1 amappl15 184 511 0 510 2 1 1 1 0 8 0 amappl14 176 166 0 159 1 0 1 1 0 8 0 amappl13 168 1 0 1 1 1 0 1 0 8 0 amappl12 160 8 0 7 1 0 1 1 0 8 0 amappl11 152 1487 0 1476 1 0 1 1 0 8 0 amappl10 144 226 0 224 2 1 1 1 0 8 0 amappl9 136 556 0 550 1 0 1 1 0 8 0 amappl8 128 209 0 183 1 0 1 1 0 8 0 amappl7 120 272 0 266 1 0 1 1 0 8 0 amappl6 112 1502 0 1494 1 0 1 1 0 8 0 amappl5 104 350 0 339 1 0 1 1 0 8 0 amappl4 96 2504 0 2478 1 0 1 1 0 8 0 amappl3 88 241 0 235 1 0 1 1 0 8 0 amappl2 80 17274 0 17207 3 1 2 3 0 8 0 amappl1 72 48521 0 48107 27 18 9 20 0 8 0 amappl 80 5136 0 5101 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 64 104 0 15 2 0 2 2 0 8 0 uaddrrnd 24 2273 0 2255 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2273 0 2255 1 0 1 1 0 8 0 vmmpekpl 168 16950 0 16924 2 0 2 2 0 8 0 vmmpepl 168 268016 0 266278 197 96 101 101 0 357 25 vmsppl 272 2268 0 2255 2 1 1 2 0 8 0 pdppl 4096 4552 0 4518 6 1 5 6 0 8 0 pvpl 32 569759 0 556074 234 98 136 164 0 265 7 pmappl 200 2272 0 2259 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 660 0 170 17 0 17 17 0 8 0