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(66f230b902a5639e,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d6fb10,ffff80001633ffb8) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d6e1e0,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d6e1e0,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d6e1c0,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e1a0,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e140,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e0e0,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e080,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e020,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e000,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e040,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e060,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e0a0,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e0c0,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e100,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e120,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e160,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e180,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e200,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e220,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e240,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e260,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e280,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e2e0,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e340,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e3a0,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e3c0,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e3e0,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e420,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e440,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e460,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e480,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6e4c0,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6ef20,ffffffff81536b70,ffff80001633ffb8) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff81536b70,ffff80001633ffb8) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff82089a70,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd803d52ba80) at ip6_mrouter_done+0xb5 rip6_detach(fffffd803d52ba80) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd803d52ba80,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd803623ca58,ffff8000ffff3650) at soo_close+0x40 fdrop(fffffd803623ca58,ffff8000ffff3650) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd803623ca58,ffff8000ffff3650) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff3650) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff3650,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff3650,ffff800016340450,ffff8000163404a0) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800016340520) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffc5f34) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc5f00, count: -47 ddb> show registers rdi 0x66f230b902a5639e rsi 0 rbp 0xffff80001633ecf0 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0xa5e9d723a59b610f r12 0 r13 0xfffffd8036d6e1e0 r14 0 r15 0x66f230b902a5639e rip 0xffffffff82089a9b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001633ecb0 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.1) pid=253958 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2290,0xffffffff825a33e0 process=0xffff8000ffff7450 user=0xffff80001633b000, vmspace=0xfffffd803f014220 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 64669 337335 72907 0 2 0x2 syz-executor.0 69739 239112 72907 0 3 0x82 nanosleep syz-executor.1 85436 477763 1 0 3 0x100083 ttyin getty 58693 132839 0 0 3 0x14200 bored sosplice 72907 327084 61038 0 3 0x82 kqread syz-fuzzer 72907 118157 61038 0 3 0x4000082 nanosleep syz-fuzzer 72907 469949 61038 0 3 0x4000082 thrsleep syz-fuzzer 72907 363877 61038 0 3 0x4000082 thrsleep syz-fuzzer 72907 349305 61038 0 3 0x4000082 thrsleep syz-fuzzer 72907 212707 61038 0 3 0x4000082 thrsleep syz-fuzzer 72907 111464 61038 0 3 0x4000082 thrsleep syz-fuzzer 72907 164002 61038 0 3 0x4000082 thrsleep syz-fuzzer 61038 57481 25389 0 3 0x10008a pause ksh 25389 503631 69521 0 3 0x92 select sshd 69521 466239 1 0 3 0x80 select sshd 86065 509957 50307 73 3 0x100090 kqread syslogd 50307 262901 1 0 3 0x100082 netio syslogd 65284 422976 1 77 3 0x100090 poll dhclient 14108 498151 1 0 3 0x80 poll dhclient 54951 419514 0 0 2 0x14200 zerothread 57306 421612 0 0 3 0x14200 aiodoned aiodoned 37714 3708 0 0 3 0x14200 syncer update 40870 127682 0 0 3 0x14200 cleaner cleaner 22998 34225 0 0 3 0x14200 reaper reaper 95471 396846 0 0 3 0x14200 pgdaemon pagedaemon 80639 164278 0 0 3 0x14200 bored crynlk 83263 484406 0 0 3 0x14200 bored crypto 68258 48837 0 0 3 0x40014200 acpi0 acpi0 15878 334541 0 0 3 0x14200 bored softnet 18200 37445 0 0 2 0x14200 systqmp 91250 400699 0 0 3 0x14200 bored systq 42077 307152 0 0 3 0x40014200 bored softclock 69748 196821 0 0 3 0x40014200 idle0 61661 74510 0 0 3 0x14200 bored smr 1 126370 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 14694K 78643K 23606 0 0 pcb 15 8K 8K 78643K 644 0 0 rtable 119 12K 12K 78643K 1660 0 0 ifaddr 67 17K 19K 78643K 555 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 307 0 0 iov 0 0K 32K 78643K 776 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1212 76K 77K 78643K 6853 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 76 0 0 VM map 2 0K 0K 78643K 18 0 0 sem 12 0K 0K 78643K 1467 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 6248 0 0 sigio 0 0K 0K 78643K 76 0 0 proc 49 38K 63K 78643K 1624 0 0 subproc 32 2K 2K 78643K 331 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 445 0 0 in_multi 33 2K 2K 78643K 356 0 0 ether_multi 1 0K 0K 78643K 16 0 0 mrt 3 0K 0K 78643K 17 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 96 424K 424K 78643K 96 0 0 exec 0 0K 1K 78643K 1072 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 105 21K 30K 78643K 16174 0 0 UVM aobj 130 5K 5K 78643K 148 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 633 0 0 NDP 15 0K 0K 78643K 175 0 0 temp 191 3540K 3668K 78643K 84579 0 0 kqueue 0 0K 0K 78643K 46 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 43 0 37 1 0 1 1 0 8 0 rtpcb 80 235 0 233 1 0 1 1 0 8 0 rtentry 112 223 0 178 2 0 2 2 0 8 0 unpcb 120 1844 0 1836 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 5422 0 5422 2 2 0 2 0 8 0 tcpcb 544 1007 0 1003 1 0 1 1 0 8 0 ipq 40 8 0 8 4 4 0 1 0 8 0 ipqe 40 24 0 24 4 4 0 1 0 8 0 inpcb 280 2894 0 2885 6 5 1 2 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 ip6q 72 2 0 2 2 2 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 48 38 0 34 1 0 1 1 0 8 0 pkpcb 40 16 0 16 5 4 1 1 0 8 1 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 80 0 80 17 16 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 974 0 755 14 0 14 14 0 8 0 art_table 32 975 0 755 2 0 2 2 0 8 0 art_node 16 219 0 178 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 1465 0 1455 1 0 1 1 0 8 0 shmpl 112 146 0 18 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 12053 0 10665 46 0 46 46 0 8 0 ffsino 240 12053 0 10665 83 0 83 83 0 8 0 nchpl 144 20455 0 18861 60 0 60 60 0 8 0 uvmvnodes 72 6366 0 0 116 0 116 116 0 8 0 vnodes 208 6366 0 0 336 0 336 336 0 8 0 namei 1024 68257 0 68257 2 1 1 1 0 8 1 vmpool 520 16 0 16 8 8 0 1 0 8 0 scsiplug 64 7 0 7 6 5 1 1 0 8 1 scxspl 192 59381 0 59381 28 26 2 7 0 8 2 plimitpl 152 427 0 420 1 0 1 1 0 8 0 sigapl 432 6372 0 6359 2 0 2 2 0 8 0 futexpl 56 117647 0 117647 1 0 1 1 0 8 1 knotepl 112 1337 0 1318 1 0 1 1 0 8 0 kqueuepl 104 2159 0 2157 1 0 1 1 0 8 0 pipepl 112 5380 0 5361 7 6 1 2 0 8 0 fdescpl 424 6373 0 6359 2 0 2 2 0 8 0 filepl 120 38921 0 38824 8 4 4 5 0 8 1 lockfpl 104 3377 0 3376 1 0 1 1 0 8 0 lockfspl 48 1335 0 1334 1 0 1 1 0 8 0 sessionpl 112 38 0 28 1 0 1 1 0 8 0 pgrppl 48 114 0 104 1 0 1 1 0 8 0 ucredpl 96 7096 0 7089 1 0 1 1 0 8 0 zombiepl 144 6363 0 6362 2 1 1 1 0 8 0 processpl 864 6391 0 6362 4 0 4 4 0 8 0 procpl 632 14573 0 14537 4 0 4 4 0 8 0 sosppl 128 56 0 56 16 16 0 1 0 8 0 sockpl 384 5026 0 5007 7 4 3 4 0 8 1 mcl64k 65536 1822 0 1822 212 211 1 33 0 8 1 mcl16k 16384 788 0 788 10 10 0 1 0 8 0 mcl12k 12288 116 0 116 13 12 1 1 0 8 1 mcl9k 9216 83 0 83 14 13 1 1 0 8 1 mcl8k 8192 92 0 92 15 14 1 1 0 8 1 mcl4k 4096 265 0 265 8 7 1 1 0 8 1 mcl2k2 2112 21 0 21 16 16 0 1 0 8 0 mcl2k 2048 62372 0 62327 38 31 7 26 0 8 0 mtagpl 80 134 0 120 4 3 1 1 0 8 0 mbufpl 256 146538 0 146435 111 104 7 23 0 8 0 bufpl 256 20274 0 13908 399 0 399 399 0 8 0 anonpl 16 580414 0 568084 182 115 67 70 0 62 12 amapchunkpl 152 28703 0 28603 74 67 7 29 0 158 2 amappl16 192 32803 0 32085 195 149 46 49 0 8 8 amappl15 184 1433 0 1432 5 4 1 1 0 8 0 amappl14 176 493 0 488 1 0 1 1 0 8 0 amappl13 168 578 0 578 2 2 0 1 0 8 0 amappl12 160 36 0 32 1 0 1 1 0 8 0 amappl11 152 496 0 485 1 0 1 1 0 8 0 amappl10 144 1392 0 1390 4 3 1 1 0 8 0 amappl9 136 2566 0 2560 1 0 1 1 0 8 0 amappl8 128 2067 0 2034 3 1 2 2 0 8 0 amappl7 120 1503 0 1495 1 0 1 1 0 8 0 amappl6 112 490 0 481 1 0 1 1 0 8 0 amappl5 104 285 0 275 1 0 1 1 0 8 0 amappl4 96 7744 0 7715 1 0 1 1 0 8 0 amappl3 88 867 0 861 1 0 1 1 0 8 0 amappl2 80 50217 0 50150 3 1 2 3 0 8 0 amappl1 72 124209 0 123804 32 23 9 20 0 8 0 amappl 80 15101 0 15067 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 64 147 0 18 3 0 3 3 0 8 0 uaddrrnd 24 6389 0 6359 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6389 0 6359 1 0 1 1 0 8 0 vmmpekpl 168 45481 0 45456 2 0 2 2 0 8 0 vmmpepl 168 752230 0 750458 304 212 92 103 0 357 9 vmsppl 272 6372 0 6359 2 1 1 2 0 8 0 pdppl 4096 12784 0 12750 6 1 5 6 0 8 0 pvpl 32 1703040 0 1687602 436 273 163 236 0 265 32 pmappl 200 6388 0 6375 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 907 0 382 17 0 17 17 0 8 0