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(78e99e05d8d4efb5,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d66ce0,ffff8000159373c8) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d65140,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d65140,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d650c0,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65060,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65000,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65020,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65040,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65080,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d650a0,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d650e0,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65100,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65120,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65160,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d651a0,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d651c0,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d651e0,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65240,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65260,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d652e0,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65300,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65340,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65360,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65380,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65400,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65480,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d654c0,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d654e0,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65520,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65540,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65560,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65580,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d655c0,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d65f60,ffffffff814b1de0,ffff8000159373c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff814b1de0,ffff8000159373c8) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81fe6690,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd8039ae7600) at ip6_mrouter_done+0xb5 rip6_detach(fffffd8039ae7600) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd8039ae7600,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd8036222e90,ffff8000149169f8) at soo_close+0x40 fdrop(fffffd8036222e90,ffff8000149169f8) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd8036222e90,ffff8000149169f8) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000149169f8) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000149169f8,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000149169f8,ffff800015937860,ffff8000159378b0) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800015937930) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffbc3c4) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbc390, count: -47 ddb> show registers rdi 0x78e99e05d8d4efb5 rsi 0 rbp 0xffff800015936100 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x9dd906d2f1690f44 r12 0 r13 0xfffffd8036d65140 r14 0 r15 0x78e99e05d8d4efb5 rip 0xffffffff81fe66bb mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000159360c0 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.1) pid=486625 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800014916780,0xffffffff8256d418 process=0xffff8000ffff77b0 user=0xffff800015932000, vmspace=0xfffffd803f013550 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 88771 279732 86719 0 2 0x2 syz-executor.0 67286 460119 86719 0 3 0x82 nanosleep syz-executor.1 29969 264554 0 0 3 0x14200 acct acct 36473 396784 1 0 3 0x100083 ttyopn getty 52010 497971 0 0 3 0x14200 bored sosplice 86719 160961 22137 0 3 0x82 thrsleep syz-fuzzer 86719 356662 22137 0 3 0x4000082 nanosleep syz-fuzzer 86719 242636 22137 0 3 0x4000082 thrsleep syz-fuzzer 86719 103100 22137 0 3 0x4000082 thrsleep syz-fuzzer 86719 399271 22137 0 3 0x4000082 thrsleep syz-fuzzer 86719 336315 22137 0 3 0x4000082 kqread syz-fuzzer 86719 217387 22137 0 3 0x4000082 thrsleep syz-fuzzer 22137 285045 25635 0 3 0x10008a pause ksh 25635 24991 16098 0 3 0x92 select sshd 16098 115497 1 0 3 0x80 select sshd 50845 375074 16067 73 3 0x100090 kqread syslogd 16067 291192 1 0 3 0x100082 netio syslogd 865 265496 1 77 3 0x100090 poll dhclient 69934 309578 1 0 3 0x80 poll dhclient 47208 359627 0 0 2 0x14200 zerothread 96518 11518 0 0 3 0x14200 aiodoned aiodoned 71897 400762 0 0 3 0x14200 syncer update 76652 374290 0 0 3 0x14200 cleaner cleaner 71554 204110 0 0 3 0x14200 reaper reaper 2845 473671 0 0 3 0x14200 pgdaemon pagedaemon 39968 143409 0 0 3 0x14200 bored crynlk 75893 259367 0 0 3 0x14200 bored crypto 490 140194 0 0 3 0x40014200 acpi0 acpi0 13329 321903 0 0 3 0x14200 bored softnet 20038 116110 0 0 2 0x14200 systqmp 98353 236904 0 0 3 0x14200 bored systq 53606 463127 0 0 3 0x40014200 bored softclock 17598 412504 0 0 3 0x40014200 idle0 4570 406080 0 0 3 0x14200 bored smr 1 116142 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 9542 6367K 8594K 78643K 32431 0 0 pcb 15 8K 8K 78643K 767 0 0 rtable 115 4K 4K 78643K 2363 0 0 ifaddr 68 17K 20K 78643K 820 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 348 0 0 iov 0 0K 32K 78643K 2119 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1210 76K 77K 78643K 8740 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 110 0 0 VM map 2 0K 0K 78643K 6 0 0 sem 12 0K 1K 78643K 763 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 6527 0 0 sigio 0 0K 0K 78643K 57 0 0 proc 50 38K 62K 78643K 1816 0 0 subproc 32 2K 2K 78643K 437 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 13294 0 0 in_multi 33 2K 2K 78643K 10081 0 0 ether_multi 1 0K 0K 78643K 19 0 0 mrt 1 0K 0K 78643K 13 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 1044 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 99 21K 31K 78643K 16528 0 0 UVM aobj 130 6K 7K 78643K 140 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 772 0 0 NDP 15 0K 0K 78643K 256 0 0 temp 191 3540K 4180K 78643K 136577 0 0 kqueue 0 0K 0K 78643K 70 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 56 0 50 1 0 1 1 0 8 0 rtpcb 80 357 0 355 1 0 1 1 0 8 0 rtentry 112 294 0 249 2 0 2 2 0 8 0 unpcb 120 8182 0 8171 15 14 1 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 6292 0 6292 1 1 0 1 0 8 0 tcpcb 544 1387 0 1383 1 0 1 1 0 8 0 ipq 40 10 0 10 5 5 0 1 0 8 0 ipqe 40 24 0 24 5 5 0 1 0 8 0 inpcb 280 10229 0 10220 8 7 1 2 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 50 0 46 1 0 1 1 0 8 0 pkpcb 40 28 0 28 10 10 0 1 0 8 0 swfcl 56 1 0 0 1 0 1 1 0 8 0 ppxss 1128 132 0 132 21 21 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1254 0 1039 14 0 14 14 0 8 0 art_table 32 1255 0 1039 2 0 2 2 0 8 0 art_node 16 280 0 239 1 0 1 1 0 8 0 sysvmsgpl 40 37 0 15 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 761 0 751 1 0 1 1 0 8 0 shmpl 112 138 0 10 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 12365 0 10973 46 0 46 46 0 8 0 ffsino 240 12365 0 10973 83 0 83 83 0 8 0 nchpl 144 22235 0 20624 62 0 62 62 0 8 0 uvmvnodes 72 7878 0 0 144 0 144 144 0 8 0 vnodes 208 7878 0 0 415 0 415 415 0 8 0 namei 1024 80214 0 80214 3 2 1 1 0 8 1 vmpool 520 4 0 4 2 2 0 1 0 8 0 scsiplug 64 14 0 14 10 10 0 1 0 8 0 scxspl 192 66786 0 66786 28 27 1 7 0 8 1 plimitpl 152 545 0 538 1 0 1 1 0 8 0 sigapl 432 6634 0 6621 2 0 2 2 0 8 0 futexpl 56 164536 0 164536 3 2 1 1 0 8 1 knotepl 112 1493 0 1474 1 0 1 1 0 8 0 kqueuepl 104 1536 0 1534 1 0 1 1 0 8 0 pipepl 112 3370 0 3351 6 5 1 2 0 8 0 fdescpl 424 6635 0 6621 2 0 2 2 0 8 0 filepl 120 59753 0 59656 17 13 4 6 0 8 1 lockfpl 104 2184 0 2183 1 0 1 1 0 8 0 lockfspl 48 725 0 724 1 0 1 1 0 8 0 sessionpl 112 45 0 35 1 0 1 1 0 8 0 pgrppl 48 97 0 87 1 0 1 1 0 8 0 ucredpl 96 10173 0 10165 1 0 1 1 0 8 0 zombiepl 144 6623 0 6622 2 1 1 1 0 8 0 processpl 864 6652 0 6622 4 0 4 4 0 8 0 procpl 632 14682 0 14646 4 0 4 4 0 8 0 sosppl 128 86 0 86 16 15 1 1 0 8 1 sockpl 384 18866 0 18844 49 45 4 8 0 8 1 mcl64k 65536 2122 0 2122 125 98 27 33 0 8 27 mcl16k 16384 84 0 84 22 22 0 1 0 8 0 mcl12k 12288 153 0 153 18 17 1 1 0 8 1 mcl9k 9216 77 0 77 26 25 1 1 0 8 1 mcl8k 8192 1736 0 1736 5 4 1 1 0 8 1 mcl4k 4096 535 0 535 6 5 1 1 0 8 1 mcl2k2 2112 37 0 37 23 23 0 1 0 8 0 mcl2k 2048 66665 0 66620 28 21 7 19 0 8 0 mtagpl 80 215 0 213 2 1 1 1 0 8 0 mbufpl 256 181413 0 181284 72 52 20 24 0 8 8 bufpl 256 26370 0 18493 494 1 493 493 0 8 0 anonpl 16 645556 0 635369 222 152 70 71 0 62 14 amapchunkpl 152 30238 0 30138 74 69 5 14 0 158 0 amappl16 192 35377 0 34627 221 175 46 50 0 8 8 amappl15 184 3126 0 3126 5 5 0 1 0 8 0 amappl14 176 889 0 883 1 0 1 1 0 8 0 amappl13 168 254 0 254 5 4 1 1 0 8 1 amappl12 160 268 0 266 1 0 1 1 0 8 0 amappl11 152 734 0 722 1 0 1 1 0 8 0 amappl10 144 135 0 134 4 3 1 1 0 8 0 amappl9 136 2165 0 2159 1 0 1 1 0 8 0 amappl8 128 1702 0 1671 2 0 2 2 0 8 0 amappl7 120 265 0 260 1 0 1 1 0 8 0 amappl6 112 733 0 723 1 0 1 1 0 8 0 amappl5 104 1434 0 1425 1 0 1 1 0 8 0 amappl4 96 6642 0 6613 1 0 1 1 0 8 0 amappl3 88 1442 0 1433 1 0 1 1 0 8 0 amappl2 80 53140 0 53075 3 1 2 3 0 8 0 amappl1 72 127736 0 127323 26 16 10 20 0 8 0 amappl 80 15278 0 15244 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 64 139 0 10 3 0 3 3 0 8 0 uaddrrnd 24 6639 0 6621 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6639 0 6621 1 0 1 1 0 8 0 vmmpekpl 168 42589 0 42566 2 0 2 2 0 8 0 vmmpepl 168 785653 0 783844 385 279 106 110 0 357 17 vmsppl 272 6634 0 6621 3 2 1 2 0 8 0 pdppl 4096 13284 0 13250 6 1 5 6 0 8 0 pvpl 32 1861832 0 1848484 547 345 202 271 0 265 65 pmappl 200 6638 0 6625 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 868 0 210 20 0 20 20 0 8 1