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(7e66e6fac312ab61,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d72a10,ffff800015929fe8) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d71120,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d71120,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d71060,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71020,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71000,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71040,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71080,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d710a0,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d710c0,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d710e0,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71100,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71140,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71160,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d711a0,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d711c0,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d711e0,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71220,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d712c0,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d712e0,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71340,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71380,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d713c0,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71440,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71480,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71500,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71540,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71580,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d715e0,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71600,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71620,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71640,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71660,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71f60,ffffffff816f0130,ffff800015929fe8) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff816f0130,ffff800015929fe8) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff8209fe10,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd8038af9c00) at ip6_mrouter_done+0xb5 rip6_detach(fffffd8038af9c00) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd8038af9c00,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd802ec95880,ffff800015953160) at soo_close+0x40 fdrop(fffffd802ec95880,ffff800015953160) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802ec95880,ffff800015953160) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff800015953160) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff800015953160,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff800015953160,ffff80001592a480,ffff80001592a4d0) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff80001592a550) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffca984) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffca950, count: -47 ddb> show registers rdi 0x7e66e6fac312ab61 rsi 0 rbp 0xffff800015928d20 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x82f0b9a53c33638f r12 0 r13 0xfffffd8036d71120 r14 0 r15 0x7e66e6fac312ab61 rip 0xffffffff8209fe3b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800015928ce0 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.1) pid=84468 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff8000159533d8,0xffffffff82598330 process=0xffff8000ffff6a30 user=0xffff800015925000, vmspace=0xfffffd803f014110 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 376 496978 76790 0 3 0x82 nanosleep syz-executor.1 9811 211675 76790 0 2 0x2 syz-executor.0 90026 265247 0 0 3 0x14200 acct acct 6129 426716 1 0 3 0x100083 ttyin getty 84999 331592 0 0 3 0x14200 bored sosplice 76790 145752 86033 0 3 0x82 thrsleep syz-fuzzer 76790 317478 86033 0 3 0x4000082 nanosleep syz-fuzzer 76790 111497 86033 0 3 0x4000082 thrsleep syz-fuzzer 76790 110559 86033 0 3 0x4000082 thrsleep syz-fuzzer 76790 289040 86033 0 3 0x4000082 thrsleep syz-fuzzer 76790 343841 86033 0 3 0x4000082 kqread syz-fuzzer 76790 126021 86033 0 3 0x4000082 thrsleep syz-fuzzer 76790 221731 86033 0 3 0x4000082 thrsleep syz-fuzzer 86033 4397 32154 0 3 0x10008a pause ksh 32154 108154 38584 0 3 0x92 select sshd 38584 381652 1 0 3 0x80 select sshd 73916 4422 76673 73 3 0x100090 kqread syslogd 76673 189674 1 0 3 0x100082 netio syslogd 32469 470488 1 77 3 0x100090 poll dhclient 86381 419891 1 0 3 0x80 poll dhclient 71296 45116 0 0 2 0x14200 zerothread 34251 452269 0 0 3 0x14200 aiodoned aiodoned 84052 41415 0 0 3 0x14200 syncer update 44712 419635 0 0 3 0x14200 cleaner cleaner 29584 459877 0 0 3 0x14200 reaper reaper 50554 309602 0 0 3 0x14200 pgdaemon pagedaemon 81444 522308 0 0 3 0x14200 bored crynlk 71531 123996 0 0 3 0x14200 bored crypto 18794 503104 0 0 3 0x40014200 acpi0 acpi0 14705 41824 0 0 3 0x14200 bored softnet 44428 63530 0 0 2 0x14200 systqmp 93908 274039 0 0 3 0x14200 bored systq 17102 474308 0 0 3 0x40014200 bored softclock 19762 425111 0 0 3 0x40014200 idle0 86227 292052 0 0 3 0x14200 bored smr 1 471822 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 9573 6385K 14689K 78643K 40307 0 0 pcb 15 8K 8K 78643K 1385 0 0 rtable 125 12K 13K 78643K 3705 0 0 ifaddr 77 22K 25K 78643K 1280 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 616 0 0 iov 0 0K 32K 78643K 1237 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1209 76K 77K 78643K 12038 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 156 0 0 VM map 2 0K 0K 78643K 16 0 0 sem 12 0K 1K 78643K 1255 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 11688 0 0 sigio 0 0K 0K 78643K 160 0 0 proc 50 38K 63K 78643K 2982 0 0 subproc 32 2K 2K 78643K 726 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 1086 0 0 in_multi 33 2K 2K 78643K 897 0 0 ether_multi 2 0K 0K 78643K 62 0 0 mrt 2 0K 0K 78643K 30 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 114 503K 503K 78643K 114 0 0 exec 0 0K 1K 78643K 1689 0 0 pfkey data 0 0K 4K 78643K 6 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 111 22K 31K 78643K 28487 0 0 UVM aobj 130 4K 4K 78643K 151 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 1288 0 0 NDP 18 0K 1K 78643K 399 0 0 temp 212 3536K 4176K 78643K 197238 0 0 kqueue 0 0K 0K 78643K 130 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 94 0 88 1 0 1 1 0 8 0 rtpcb 80 512 0 510 1 0 1 1 0 8 0 rtentry 112 474 0 427 2 0 2 2 0 8 0 unpcb 120 4183 0 4175 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 4 0 4 4 4 0 1 0 8 0 tcpqe 32 2452 0 2452 2 2 0 2 0 8 0 tcpcb 544 2235 0 2231 1 0 1 1 0 8 0 ipq 40 17 0 17 6 6 0 1 0 8 0 ipqe 40 47 0 47 6 6 0 1 0 8 0 inpcb 280 6504 0 6495 11 10 1 2 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 ip6q 72 3 0 3 3 3 0 1 0 8 0 ip6af 40 4 0 4 2 2 0 1 0 8 0 nd6 48 84 0 80 1 0 1 1 0 8 0 pkpcb 40 59 0 59 18 18 0 1 0 8 0 swfcl 56 7 0 0 1 0 1 1 0 8 0 ppxss 1128 207 0 207 35 34 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2058 0 1811 18 2 16 16 0 8 0 art_table 32 2059 0 1811 2 0 2 2 0 8 0 art_node 16 456 0 413 1 0 1 1 0 8 0 sysvmsgpl 40 36 0 34 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1253 0 1243 1 0 1 1 0 8 0 shmpl 112 149 0 21 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 19446 0 18039 46 0 46 46 0 8 0 ffsino 240 19446 0 18039 84 0 84 84 0 8 0 nchpl 144 35761 0 34169 60 0 60 60 0 8 0 uvmvnodes 72 8576 0 0 156 0 156 156 0 8 0 vnodes 208 8576 0 0 452 0 452 452 0 8 0 namei 1024 118126 0 118125 8 7 1 1 0 8 0 vmpool 520 14 0 14 7 7 0 1 0 8 0 scsiplug 64 22 0 22 16 16 0 1 0 8 0 scxspl 192 121669 0 121669 32 29 3 6 0 8 3 plimitpl 152 1013 0 1006 1 0 1 1 0 8 0 sigapl 432 11742 0 11729 2 0 2 2 0 8 0 futexpl 56 193243 0 193243 9 8 1 1 0 8 1 knotepl 112 2860 0 2841 1 0 1 1 0 8 0 kqueuepl 104 2626 0 2624 1 0 1 1 0 8 0 pipepl 112 6644 0 6625 16 15 1 2 0 8 0 fdescpl 424 11743 0 11729 2 0 2 2 0 8 0 filepl 120 71547 0 71450 14 10 4 6 0 8 1 lockfpl 104 3628 0 3627 1 0 1 1 0 8 0 lockfspl 48 1224 0 1223 1 0 1 1 0 8 0 sessionpl 112 60 0 50 1 0 1 1 0 8 0 pgrppl 48 152 0 142 1 0 1 1 0 8 0 ucredpl 96 14327 0 14319 1 0 1 1 0 8 0 zombiepl 144 11731 0 11730 2 1 1 1 0 8 0 processpl 864 11760 0 11730 4 0 4 4 0 8 0 procpl 632 25732 0 25695 4 0 4 4 0 8 0 sosppl 128 202 0 202 41 40 1 1 0 8 1 sockpl 384 11362 0 11343 17 14 3 4 0 8 1 mcl64k 65536 1110 0 1110 125 124 1 33 0 8 1 mcl16k 16384 59 0 59 27 27 0 1 0 8 0 mcl12k 12288 202 0 202 34 33 1 1 0 8 1 mcl9k 9216 146 0 146 36 35 1 1 0 8 1 mcl8k 8192 185 0 185 37 36 1 1 0 8 1 mcl4k 4096 576 0 576 16 15 1 1 0 8 1 mcl2k2 2112 67 0 67 30 30 0 1 0 8 0 mcl2k 2048 76721 0 76675 29 22 7 21 0 8 0 mtagpl 80 343 0 337 4 3 1 1 0 8 0 mbufpl 256 185264 0 185177 76 68 8 25 0 8 0 bufpl 256 37403 0 28827 537 0 537 537 0 8 0 anonpl 16 1106097 0 1093662 312 246 66 79 0 62 5 amapchunkpl 152 54636 0 54503 163 144 19 30 0 158 12 amappl16 192 60551 0 59854 354 310 44 57 0 8 8 amappl15 184 3241 0 3239 8 7 1 1 0 8 0 amappl14 176 2505 0 2503 1 0 1 1 0 8 0 amappl13 168 1104 0 1104 10 10 0 1 0 8 0 amappl12 160 307 0 307 6 6 0 1 0 8 0 amappl11 152 704 0 691 1 0 1 1 0 8 0 amappl10 144 1968 0 1967 1 0 1 1 0 8 0 amappl9 136 3783 0 3777 1 0 1 1 0 8 0 amappl8 128 3229 0 3198 3 1 2 2 0 8 0 amappl7 120 2172 0 2164 1 0 1 1 0 8 0 amappl6 112 648 0 634 1 0 1 1 0 8 0 amappl5 104 780 0 769 1 0 1 1 0 8 0 amappl4 96 11785 0 11752 1 0 1 1 0 8 0 amappl3 88 3496 0 3491 1 0 1 1 0 8 0 amappl2 80 93197 0 93127 3 1 2 3 0 8 0 amappl1 72 213632 0 213223 27 18 9 20 0 8 0 amappl 80 26647 0 26605 2 0 2 2 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 64 150 0 21 3 0 3 3 0 8 0 uaddrrnd 24 11757 0 11729 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11757 0 11729 1 0 1 1 0 8 0 vmmpekpl 168 69190 0 69165 2 0 2 2 0 8 0 vmmpepl 168 1368550 0 1366793 532 435 97 108 0 357 14 vmsppl 272 11742 0 11729 6 5 1 2 0 8 0 pdppl 4096 23520 0 23486 6 1 5 6 0 8 0 pvpl 32 3218612 0 3203053 885 638 247 274 0 265 104 pmappl 200 11756 0 11743 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 976 0 309 21 1 20 20 0 8 0