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(60c9469b3db27526,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d69be0,ffff800014d0e158) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d68140,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d68140,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d68120,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d680c0,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68060,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68040,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68000,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68020,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68080,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d680a0,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d680e0,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68100,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68180,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d681a0,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68220,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68260,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d682a0,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d682e0,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68320,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68340,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68360,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d683e0,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68400,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68440,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68480,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d684c0,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d684e0,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68500,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d685e0,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68640,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68680,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d686c0,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68f60,ffffffff81c07910,ffff800014d0e158) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff81c07910,ffff800014d0e158) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81f40050,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd80363dcd88) at ip6_mrouter_done+0xb5 rip6_detach(fffffd80363dcd88) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd80363dcd88,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd803ca7f088,ffff800014d34018) at soo_close+0x40 fdrop(fffffd803ca7f088,ffff800014d34018) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd803ca7f088,ffff800014d34018) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff800014d34018) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff800014d34018,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff800014d34018,ffff800014d0e5f0,ffff800014d0e640) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800014d0e6c0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7fffff1594) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff1560, count: -47 ddb> show registers rdi 0x60c9469b3db27526 rsi 0 rbp 0xffff800014d0ce90 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0xa4c2156cbd59d8dc r12 0 r13 0xfffffd8036d68140 r14 0 r15 0x60c9469b3db27526 rip 0xffffffff81f4007b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800014d0ce50 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=426547 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800014d35b40,0xffffffff825a0168 process=0xffff8000ffffb7a8 user=0xffff800014d09000, vmspace=0xfffffd803f013660 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 15739 110622 34278 0 3 0x80 nanosleep syz-executor.1 15739 322193 34278 0 3 0x4000080 ttyout syz-executor.1 15739 458505 34278 0 3 0x4000080 fsleep syz-executor.1 34278 523308 59279 0 3 0x82 nanosleep syz-executor.1 46334 262564 1 0 3 0x100083 ttyin getty 92843 469051 0 0 3 0x14200 acct acct 50404 517164 59279 0 3 0x82 nanosleep syz-executor.0 72815 409022 0 0 3 0x14200 bored sosplice 59279 103665 7636 0 3 0x82 thrsleep syz-fuzzer 59279 113363 7636 0 3 0x4000082 thrsleep syz-fuzzer 59279 10063 7636 0 3 0x4000082 kqread syz-fuzzer 59279 470357 7636 0 3 0x4000082 thrsleep syz-fuzzer 59279 287789 7636 0 3 0x4000082 thrsleep syz-fuzzer 59279 370144 7636 0 3 0x4000082 thrsleep syz-fuzzer 59279 315956 7636 0 3 0x4000082 thrsleep syz-fuzzer 7636 470832 35793 0 3 0x10008a pause ksh 35793 400662 39971 0 3 0x92 select sshd 39971 19832 1 0 3 0x80 select sshd 84505 233029 17805 73 3 0x100090 kqread syslogd 17805 224210 1 0 3 0x100082 netio syslogd 58762 9122 1 77 3 0x100090 poll dhclient 12914 186683 1 0 3 0x80 poll dhclient 79897 239129 0 0 2 0x14200 zerothread 38411 177067 0 0 3 0x14200 aiodoned aiodoned 21026 152256 0 0 3 0x14200 syncer update 37793 264763 0 0 3 0x14200 cleaner cleaner 74554 297766 0 0 3 0x14200 reaper reaper 36773 456518 0 0 3 0x14200 pgdaemon pagedaemon 65620 243192 0 0 3 0x14200 bored crynlk 52836 248609 0 0 3 0x14200 bored crypto 83511 36755 0 0 3 0x40014200 acpi0 acpi0 57999 408260 0 0 3 0x14200 bored softnet 6663 44658 0 0 2 0x14200 systqmp 54335 351999 0 0 3 0x14200 bored systq 98856 498001 0 0 3 0x40014200 bored softclock 19444 196851 0 0 3 0x40014200 idle0 69580 258432 0 0 3 0x14200 bored smr 1 131257 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 6376K 7012K 78643K 23919 0 0 pcb 15 8K 8K 78643K 516 0 0 rtable 101 11K 12K 78643K 2402 0 0 ifaddr 65 17K 19K 78643K 608 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 182 0 0 iov 0 0K 24K 78643K 483 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1217 76K 77K 78643K 6263 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 50 0 0 VM map 2 0K 0K 78643K 6 0 0 sem 12 0K 0K 78643K 357 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 6 17K 25K 78643K 7623 0 0 sigio 0 0K 0K 78643K 31 0 0 proc 50 38K 63K 78643K 2208 0 0 subproc 32 2K 2K 78643K 295 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 419 0 0 in_multi 22 1K 2K 78643K 389 0 0 ether_multi 2 0K 0K 78643K 52 0 0 mrt 2 0K 0K 78643K 16 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 816 0 0 pfkey data 0 0K 4K 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 29K 78643K 17784 0 0 UVM aobj 113 4K 4K 78643K 136 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 508 0 0 NDP 15 0K 1K 78643K 209 0 0 temp 192 3540K 4180K 78643K 109685 0 0 kqueue 0 0K 0K 78643K 23 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 37 0 33 1 0 1 1 0 8 0 rtpcb 80 654 0 652 1 0 1 1 0 8 0 rtentry 112 455 0 420 2 0 2 2 0 8 0 unpcb 120 1631 0 1623 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 3 0 3 2 2 0 1 0 8 0 tcpqe 32 70 0 70 7 7 0 1 0 8 0 tcpcb 544 1062 0 1058 1 0 1 1 0 8 0 ipq 40 11 0 11 2 2 0 1 0 8 0 ipqe 40 23 0 23 2 2 0 1 0 8 0 inpcb 280 3436 0 3427 7 6 1 2 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 34 0 32 1 0 1 1 0 8 0 pkpcb 40 31 0 31 7 7 0 1 0 8 0 swfcl 56 10 0 0 1 0 1 1 0 8 0 ppxss 1128 111 0 110 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 895 0 723 14 2 12 14 0 8 0 art_table 32 896 0 723 2 0 2 2 0 8 0 art_node 16 197 0 165 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 8 1 1 0 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 355 0 345 1 0 1 1 0 8 0 shmpl 112 134 0 23 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 13067 0 11562 49 0 49 49 0 8 0 ffsino 240 13067 0 11562 89 0 89 89 0 8 0 nchpl 144 22730 0 21144 60 0 60 60 0 8 0 uvmvnodes 72 6499 0 0 119 0 119 119 0 8 0 vnodes 208 6499 0 0 343 0 343 343 0 8 0 namei 1024 66287 0 66287 2 1 1 1 0 8 1 vmpool 520 4 0 4 2 2 0 1 0 8 0 scsiplug 64 17 0 17 6 6 0 1 0 8 0 scxspl 192 73756 0 73756 25 24 1 7 0 8 1 plimitpl 152 395 0 387 1 0 1 1 0 8 0 sigapl 432 7751 0 7737 2 0 2 2 0 8 0 futexpl 56 75275 0 75274 2 1 1 1 0 8 0 knotepl 112 1227 0 1208 1 0 1 1 0 8 0 kqueuepl 104 1119 0 1117 1 0 1 1 0 8 0 pipepl 112 1920 0 1901 7 5 2 2 0 8 1 fdescpl 424 7752 0 7737 2 0 2 2 0 8 0 filepl 120 33684 0 33584 7 2 5 5 0 8 1 lockfpl 104 1588 0 1587 1 0 1 1 0 8 0 lockfspl 48 587 0 586 1 0 1 1 0 8 0 sessionpl 112 34 0 24 1 0 1 1 0 8 0 pgrppl 48 71 0 61 1 0 1 1 0 8 0 ucredpl 96 6823 0 6812 1 0 1 1 0 8 0 zombiepl 144 7738 0 7737 1 0 1 1 0 8 0 processpl 864 7768 0 7737 4 0 4 4 0 8 0 procpl 632 16249 0 16210 4 0 4 4 0 8 0 sosppl 128 88 0 88 14 13 1 1 0 8 1 sockpl 384 5773 0 5754 9 6 3 3 0 8 1 mcl64k 65536 190 0 190 16 16 0 1 0 8 0 mcl16k 16384 19 0 19 10 10 0 1 0 8 0 mcl12k 12288 47 0 47 12 11 1 1 0 8 1 mcl9k 9216 65 0 65 14 13 1 1 0 8 1 mcl8k 8192 121 0 121 16 15 1 1 0 8 1 mcl4k 4096 256 0 256 10 9 1 1 0 8 1 mcl2k2 2112 22 0 22 9 9 0 1 0 8 0 mcl2k 2048 40768 0 40725 36 26 10 11 0 8 2 mtagpl 80 203 0 193 3 2 1 1 0 8 0 mbufpl 256 131565 0 131477 32 24 8 15 0 8 0 bufpl 256 28363 0 21851 408 0 408 408 0 8 0 anonpl 16 671031 0 664250 155 118 37 55 0 62 0 amapchunkpl 152 30805 0 30716 45 39 6 14 0 158 0 amappl16 192 41913 0 41570 161 142 19 37 0 8 0 amappl15 184 367 0 365 1 0 1 1 0 8 0 amappl14 176 2217 0 2214 1 0 1 1 0 8 0 amappl13 168 1961 0 1961 1 1 0 1 0 8 0 amappl12 160 910 0 909 1 0 1 1 0 8 0 amappl11 152 283 0 269 1 0 1 1 0 8 0 amappl10 144 1810 0 1808 3 2 1 1 0 8 0 amappl9 136 509 0 502 1 0 1 1 0 8 0 amappl8 128 356 0 328 1 0 1 1 0 8 0 amappl7 120 1900 0 1892 1 0 1 1 0 8 0 amappl6 112 280 0 269 1 0 1 1 0 8 0 amappl5 104 1873 0 1863 1 0 1 1 0 8 0 amappl4 96 6289 0 6262 1 0 1 1 0 8 0 amappl3 88 4173 0 4168 1 0 1 1 0 8 0 amappl2 80 62226 0 62148 3 1 2 3 0 8 0 amappl1 72 136120 0 135700 22 12 10 20 0 8 0 amappl 80 16761 0 16725 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 64 135 0 23 2 0 2 2 0 8 0 uaddrrnd 24 7756 0 7737 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7756 0 7737 1 0 1 1 0 8 0 vmmpekpl 168 41608 0 41579 2 0 2 2 0 8 0 vmmpepl 168 894341 0 892846 179 112 67 82 0 357 0 vmsppl 272 7751 0 7737 4 3 1 2 0 8 0 pdppl 4096 15518 0 15482 7 2 5 6 0 8 0 pvpl 32 2028508 0 2018451 369 277 92 173 0 265 1 pmappl 200 7755 0 7741 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 651 0 110 16 0 16 16 0 8 0