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(b5de2bb80a1f77c4,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d5ea80,ffff800015d21e18) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d5d2c0,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d5d2c0,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d5d280,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d260,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d240,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d200,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d1e0,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d1c0,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d1a0,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d180,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d160,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d140,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d060,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d040,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d020,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d000,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d080,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d0a0,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d0c0,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d0e0,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d100,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d120,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d220,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d2a0,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d340,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d380,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d400,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d420,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d440,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d4a0,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d500,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5d520,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d5df60,ffffffff81cc7b10,ffff800015d21e18) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff81cc7b10,ffff800015d21e18) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff818bae30,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd803e823480) at ip6_mrouter_done+0xb5 rip6_detach(fffffd803e823480) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd803e823480,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd802f14f358,ffff800015f32780) at soo_close+0x40 fdrop(fffffd802f14f358,ffff800015f32780) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802f14f358,ffff800015f32780) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff800015f32780) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff800015f32780,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff800015f32780,ffff800015d222b0,ffff800015d22300) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800015d22380) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffea454) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffea420, count: -47 ddb> show registers rdi 0xb5de2bb80a1f77c4 rsi 0 rbp 0xffff800015d20b50 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x71a33d51eb76774b r12 0 r13 0xfffffd8036d5d2c0 r14 0 r15 0xb5de2bb80a1f77c4 rip 0xffffffff818bae5b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800015d20b10 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=207233 stat=onproc flags process=1018 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800015f333d8,0xffffffff82563a68 process=0xffff8000148a3458 user=0xffff800015d1d000, vmspace=0xfffffd803f013220 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 60284 336399 8442 0 2 0x2 syz-executor.1 37999 472164 8442 0 3 0x82 nanosleep syz-executor.0 60892 264577 1 0 3 0x100083 ttyin getty 57886 179683 0 0 3 0x14200 acct acct 56238 13883 0 0 3 0x14200 bored sosplice 8442 241439 11602 0 3 0x82 thrsleep syz-fuzzer 8442 249551 11602 0 3 0x4000082 nanosleep syz-fuzzer 8442 504090 11602 0 3 0x4000082 thrsleep syz-fuzzer 8442 52448 11602 0 3 0x4000082 thrsleep syz-fuzzer 8442 262153 11602 0 3 0x4000082 thrsleep syz-fuzzer 8442 303090 11602 0 3 0x4000082 thrsleep syz-fuzzer 8442 96549 11602 0 3 0x4000082 thrsleep syz-fuzzer 8442 5046 11602 0 3 0x4000082 kqread syz-fuzzer 11602 246026 50797 0 3 0x10008a pause ksh 50797 237853 11536 0 3 0x92 select sshd 11536 184573 1 0 3 0x80 select sshd 58586 159117 4907 73 3 0x100090 kqread syslogd 4907 141748 1 0 3 0x100082 netio syslogd 95300 524172 1 77 3 0x100090 poll dhclient 48065 267763 1 0 3 0x80 poll dhclient 65409 118669 0 0 2 0x14200 zerothread 79669 83091 0 0 3 0x14200 aiodoned aiodoned 88442 206216 0 0 3 0x14200 syncer update 69324 284048 0 0 3 0x14200 cleaner cleaner 25014 417579 0 0 3 0x14200 reaper reaper 22848 404057 0 0 3 0x14200 pgdaemon pagedaemon 58214 394280 0 0 3 0x14200 bored crynlk 96022 257192 0 0 3 0x14200 bored crypto 98505 37589 0 0 3 0x40014200 acpi0 acpi0 93466 518611 0 0 3 0x14200 bored softnet 62392 203582 0 0 2 0x14200 systqmp 13927 165957 0 0 3 0x14200 bored systq 27154 331050 0 0 3 0x40014200 bored softclock 33555 420403 0 0 3 0x40014200 idle0 75114 21326 0 0 3 0x14200 bored smr 1 419356 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 9538 6355K 14779K 78643K 17846 0 0 pcb 15 8K 8K 78643K 269 0 0 rtable 112 4K 4K 78643K 1191 0 0 ifaddr 67 15K 16K 78643K 357 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 167 0 0 iov 0 0K 28K 78643K 250 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1209 76K 77K 78643K 3938 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 49 0 0 VM map 2 0K 0K 78643K 6 0 0 sem 12 0K 0K 78643K 338 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 2801 0 0 sigio 0 0K 0K 78643K 38 0 0 proc 48 38K 55K 78643K 1165 0 0 subproc 32 2K 2K 78643K 289 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 269 0 0 ether_multi 2 0K 0K 78643K 13 0 0 mrt 3 0K 0K 78643K 10 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 571 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 100 21K 30K 78643K 7622 0 0 UVM aobj 129 4K 4K 78643K 161 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 252 0 0 NDP 15 0K 0K 78643K 116 0 0 temp 191 3540K 3617K 78643K 49544 0 0 kqueue 0 0K 0K 78643K 26 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 39 0 33 1 0 1 1 0 8 0 rtpcb 80 132 0 130 1 0 1 1 0 8 0 rtentry 112 201 0 157 2 0 2 2 0 8 0 unpcb 120 937 0 929 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 3135 0 3135 2 2 0 1 0 8 0 tcpcb 544 490 0 486 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 1 0 1 1 1 0 1 0 8 0 inpcb 280 1409 0 1400 2 1 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 8 0 8 3 3 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 43 0 43 12 11 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 888 0 670 14 0 14 14 0 8 0 art_table 32 889 0 670 2 0 2 2 0 8 0 art_node 16 198 0 157 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 336 0 326 1 0 1 1 0 8 0 shmpl 112 159 0 32 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 5613 0 4224 46 0 46 46 0 8 0 ffsino 240 5613 0 4224 83 0 83 83 0 8 0 nchpl 144 9529 0 7942 60 0 60 60 0 8 0 uvmvnodes 72 7549 0 0 138 0 138 138 0 8 0 vnodes 208 7549 0 0 398 0 398 398 0 8 0 namei 1024 31414 0 31414 5 4 1 1 0 8 1 vmpool 520 4 0 4 2 2 0 1 0 8 0 scsiplug 64 3 0 3 3 3 0 1 0 8 0 scxspl 192 36370 0 36370 16 15 1 7 0 8 1 plimitpl 152 281 0 274 1 0 1 1 0 8 0 sigapl 432 2928 0 2915 2 0 2 2 0 8 0 futexpl 56 45097 0 45097 5 4 1 1 0 8 1 knotepl 112 844 0 825 1 0 1 1 0 8 0 kqueuepl 104 631 0 629 1 0 1 1 0 8 0 pipepl 112 1600 0 1581 5 4 1 2 0 8 0 fdescpl 424 2929 0 2915 2 0 2 2 0 8 0 filepl 120 17536 0 17439 8 4 4 5 0 8 0 lockfpl 104 909 0 908 1 0 1 1 0 8 0 lockfspl 48 313 0 312 1 0 1 1 0 8 0 sessionpl 112 33 0 23 1 0 1 1 0 8 0 pgrppl 48 65 0 55 1 0 1 1 0 8 0 ucredpl 96 3560 0 3551 1 0 1 1 0 8 0 zombiepl 144 2916 0 2915 3 2 1 1 0 8 0 processpl 864 2945 0 2915 4 0 4 4 0 8 0 procpl 632 6219 0 6182 5 1 4 5 0 8 0 sosppl 128 46 0 46 11 10 1 1 0 8 1 sockpl 384 2509 0 2490 10 7 3 4 0 8 1 mcl64k 65536 587 0 587 47 46 1 33 0 8 1 mcl16k 16384 9 0 9 6 5 1 1 0 8 1 mcl12k 12288 47 0 47 12 11 1 1 0 8 1 mcl9k 9216 33 0 33 13 12 1 1 0 8 1 mcl8k 8192 49 0 49 12 11 1 1 0 8 1 mcl4k 4096 163 0 163 7 6 1 1 0 8 1 mcl2k2 2112 13 0 13 7 7 0 1 0 8 0 mcl2k 2048 59344 0 59295 20 13 7 17 0 8 0 mtagpl 80 88 0 82 3 2 1 1 0 8 0 mbufpl 256 110908 0 110804 37 27 10 25 0 8 2 bufpl 256 15159 0 7618 472 0 472 472 0 8 0 anonpl 16 307862 0 296568 138 77 61 81 0 62 7 amapchunkpl 152 14434 0 14329 47 41 6 17 0 158 1 amappl16 192 16340 0 15641 116 74 42 48 0 8 6 amappl15 184 265 0 265 3 3 0 1 0 8 0 amappl14 176 495 0 490 1 0 1 1 0 8 0 amappl13 168 248 0 248 4 4 0 1 0 8 0 amappl12 160 120 0 115 1 0 1 1 0 8 0 amappl11 152 661 0 650 1 0 1 1 0 8 0 amappl10 144 14 0 13 2 1 1 1 0 8 0 amappl9 136 1143 0 1137 1 0 1 1 0 8 0 amappl8 128 648 0 622 1 0 1 1 0 8 0 amappl7 120 116 0 109 1 0 1 1 0 8 0 amappl6 112 642 0 632 1 0 1 1 0 8 0 amappl5 104 388 0 375 1 0 1 1 0 8 0 amappl4 96 3315 0 3289 1 0 1 1 0 8 0 amappl3 88 630 0 624 1 0 1 1 0 8 0 amappl2 80 21911 0 21843 3 1 2 3 0 8 0 amappl1 72 62772 0 62365 26 16 10 20 0 8 0 amappl 80 6680 0 6644 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 64 160 0 32 3 0 3 3 0 8 0 uaddrrnd 24 2933 0 2915 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2933 0 2915 1 0 1 1 0 8 0 vmmpekpl 168 20820 0 20790 2 0 2 2 0 8 0 vmmpepl 168 350629 0 348883 257 156 101 106 0 357 25 vmsppl 272 2928 0 2915 5 4 1 2 0 8 0 pdppl 4096 5872 0 5838 6 1 5 6 0 8 0 pvpl 32 941597 0 927239 410 254 156 295 0 265 23 pmappl 200 2932 0 2919 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 721 0 119 19 0 19 19 0 8 0