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(9060664b0e7d60ee,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d69ae0,ffff80001551da68) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d68280,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d68280,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d68240,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d681e0,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d681a0,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68180,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68160,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68140,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68120,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68100,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68040,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68020,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68000,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68060,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68080,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d680a0,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d680c0,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d680e0,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d681c0,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68200,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68220,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68260,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d682a0,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68340,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68380,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d683e0,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68440,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68460,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68480,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d684c0,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d684e0,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68560,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d68f60,ffffffff81cdc1d0,ffff80001551da68) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff81cdc1d0,ffff80001551da68) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81eae860,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd80363d5d88) at ip6_mrouter_done+0xb5 rip6_detach(fffffd80363d5d88) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd80363d5d88,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd803755cbb8,ffff8000159538c8) at soo_close+0x40 fdrop(fffffd803755cbb8,ffff8000159538c8) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd803755cbb8,ffff8000159538c8) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000159538c8) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000159538c8,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000159538c8,ffff80001551df00,ffff80001551df50) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff80001551dfd0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffdb514) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdb4e0, count: -47 ddb> show registers rdi 0x9060664b0e7d60ee rsi 0 rbp 0xffff80001551c7a0 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x98fe05a5f0ca9263 r12 0 r13 0xfffffd8036d68280 r14 0 r15 0x9060664b0e7d60ee rip 0xffffffff81eae88b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001551c760 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=93923 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800015952290,0xffffffff8255c0e8 process=0xffff8000ffff7b10 user=0xffff800015519000, vmspace=0xfffffd803f014cc0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 26176 98568 88161 0 2 0 syz-executor.1 26176 314610 88161 0 3 0x4000080 fifor syz-executor.1 50749 497052 62616 0 3 0x82 nanosleep syz-executor.0 88161 373958 62616 0 3 0x82 nanosleep syz-executor.1 74982 149915 0 0 3 0x14200 acct acct 84902 388370 1 0 3 0x100083 ttyin getty 64251 340140 0 0 3 0x14200 bored sosplice 62616 386816 75128 0 3 0x82 thrsleep syz-fuzzer 62616 425104 75128 0 3 0x4000082 thrsleep syz-fuzzer 62616 11292 75128 0 3 0x4000082 kqread syz-fuzzer 62616 454748 75128 0 3 0x4000082 thrsleep syz-fuzzer 62616 296932 75128 0 3 0x4000082 thrsleep syz-fuzzer 62616 419070 75128 0 3 0x4000082 thrsleep syz-fuzzer 62616 127840 75128 0 3 0x4000082 thrsleep syz-fuzzer 75128 405524 51806 0 3 0x10008a pause ksh 51806 341449 24391 0 3 0x92 select sshd 24391 511037 1 0 3 0x80 select sshd 72039 327248 93659 73 3 0x100090 kqread syslogd 93659 159002 1 0 3 0x100082 netio syslogd 89635 369376 1 77 3 0x100090 poll dhclient 93650 478420 1 0 3 0x80 poll dhclient 91536 304437 0 0 2 0x14200 zerothread 79417 185203 0 0 3 0x14200 aiodoned aiodoned 43393 455429 0 0 3 0x14200 syncer update 35937 442964 0 0 3 0x14200 cleaner cleaner 86814 475149 0 0 3 0x14200 reaper reaper 9884 160054 0 0 3 0x14200 pgdaemon pagedaemon 7049 306663 0 0 3 0x14200 bored crynlk 77462 168308 0 0 3 0x14200 bored crypto 25149 510196 0 0 3 0x40014200 acpi0 acpi0 72567 255240 0 0 3 0x14200 bored softnet 14330 494456 0 0 2 0x14200 systqmp 10382 482900 0 0 3 0x14200 bored systq 83907 243313 0 0 3 0x40014200 bored softclock 61404 359883 0 0 3 0x40014200 idle0 5800 267083 0 0 3 0x14200 bored smr 1 459796 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 9554 7079K 7530K 78643K 23053 0 0 pcb 15 8K 8K 78643K 1593 0 0 rtable 112 4K 4K 78643K 1550 0 0 ifaddr 70 17K 19K 78643K 550 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 239 0 0 iov 0 0K 24K 78643K 400 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1207 76K 77K 78643K 5834 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 55 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 12 1K 1K 78643K 19 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 6 17K 25K 78643K 6142 0 0 sigio 0 0K 0K 78643K 42 0 0 proc 49 38K 63K 78643K 1365 0 0 subproc 32 2K 2K 78643K 291 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 525 0 0 in_multi 33 2K 2K 78643K 348 0 0 ether_multi 2 0K 0K 78643K 28 0 0 mrt 3 0K 0K 78643K 14 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 768 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 102 21K 31K 78643K 15657 0 0 UVM aobj 130 4K 4K 78643K 130 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 470 0 0 NDP 16 0K 1K 78643K 169 0 0 temp 198 3540K 4180K 78643K 92824 0 0 kqueue 0 0K 0K 78643K 35 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 31 1 0 1 1 0 8 0 rtpcb 80 174 0 172 1 0 1 1 0 8 0 rtentry 112 203 0 159 2 0 2 2 0 8 0 unpcb 120 1507 0 1497 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 4322 0 4322 1 1 0 1 0 8 0 tcpcb 544 852 0 848 1 0 1 1 0 8 0 ipq 40 4 0 4 2 2 0 1 0 8 0 ipqe 40 14 0 14 2 2 0 1 0 8 0 inpcb 280 3561 0 3552 7 6 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 22 0 22 8 8 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 82 0 82 23 22 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 904 0 685 14 0 14 14 0 8 0 art_table 32 905 0 685 2 0 2 2 0 8 0 art_node 16 196 0 155 1 0 1 1 0 8 0 sysvmsgpl 40 43 0 25 1 0 1 1 0 8 0 semupl 112 7 0 7 1 1 0 1 0 8 0 semapl 112 17 0 7 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 12468 0 11079 46 0 46 46 0 8 0 ffsino 240 12468 0 11079 83 0 83 83 0 8 0 nchpl 144 21763 0 20167 60 0 60 60 0 8 0 uvmvnodes 72 6213 0 0 113 0 113 113 0 8 0 vnodes 208 6213 0 0 327 0 327 327 0 8 0 namei 1024 72880 0 72880 3 2 1 1 0 8 1 scsiplug 64 9 0 9 5 4 1 1 0 8 1 scxspl 192 64087 0 64087 19 18 1 7 0 8 1 plimitpl 152 425 0 418 1 0 1 1 0 8 0 sigapl 432 6269 0 6255 2 0 2 2 0 8 0 futexpl 56 118410 0 118410 2 1 1 1 0 8 1 knotepl 112 1105 0 1086 1 0 1 1 0 8 0 kqueuepl 104 1057 0 1055 1 0 1 1 0 8 0 pipepl 112 5142 0 5123 5 4 1 2 0 8 0 fdescpl 424 6270 0 6255 2 0 2 2 0 8 0 filepl 120 39877 0 39778 7 3 4 5 0 8 1 lockfpl 104 3792 0 3791 1 0 1 1 0 8 0 lockfspl 48 1251 0 1250 1 0 1 1 0 8 0 sessionpl 112 33 0 23 1 0 1 1 0 8 0 pgrppl 48 82 0 72 1 0 1 1 0 8 0 ucredpl 96 8916 0 8909 1 0 1 1 0 8 0 zombiepl 144 6257 0 6256 2 1 1 1 0 8 0 processpl 864 6287 0 6256 4 0 4 4 0 8 0 procpl 632 14242 0 14204 4 0 4 4 0 8 0 sosppl 128 42 0 42 13 13 0 1 0 8 0 sockpl 384 5499 0 5478 8 5 3 4 0 8 0 mcl64k 65536 117 0 117 19 18 1 1 0 8 1 mcl16k 16384 22 0 22 17 17 0 1 0 8 0 mcl12k 12288 75 0 75 21 20 1 1 0 8 1 mcl9k 9216 62 0 62 19 18 1 1 0 8 1 mcl8k 8192 79 0 79 22 21 1 1 0 8 1 mcl4k 4096 1263 0 1263 12 11 1 1 0 8 1 mcl2k2 2112 82 0 82 16 16 0 1 0 8 0 mcl2k 2048 63064 0 63016 27 20 7 16 0 8 0 mtagpl 80 141 0 129 3 2 1 1 0 8 0 mbufpl 256 131497 0 131364 19 9 10 11 0 8 0 bufpl 256 20038 0 13769 393 0 393 393 0 8 1 anonpl 16 500009 0 487555 125 68 57 68 0 62 0 amapchunkpl 152 28693 0 28584 95 90 5 29 0 158 0 amappl16 192 28769 0 28056 119 81 38 48 0 8 1 amappl15 184 1276 0 1275 1 0 1 1 0 8 0 amappl14 176 864 0 860 1 0 1 1 0 8 0 amappl13 168 194 0 192 1 0 1 1 0 8 0 amappl12 160 291 0 289 1 0 1 1 0 8 0 amappl11 152 1007 0 994 1 0 1 1 0 8 0 amappl10 144 2869 0 2869 2 2 0 1 0 8 0 amappl9 136 777 0 770 1 0 1 1 0 8 0 amappl8 128 287 0 260 1 0 1 1 0 8 0 amappl7 120 2964 0 2959 1 0 1 1 0 8 0 amappl6 112 995 0 981 1 0 1 1 0 8 0 amappl5 104 552 0 543 1 0 1 1 0 8 0 amappl4 96 6677 0 6645 1 0 1 1 0 8 0 amappl3 88 578 0 572 1 0 1 1 0 8 0 amappl2 80 48806 0 48730 3 1 2 3 0 8 0 amappl1 72 118207 0 117783 27 18 9 20 0 8 0 amappl 80 14716 0 14678 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 64 129 0 0 3 0 3 3 0 8 0 uaddrrnd 24 6270 0 6255 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6270 0 6255 1 0 1 1 0 8 0 vmmpekpl 168 44732 0 44707 2 0 2 2 0 8 0 vmmpepl 168 725785 0 723907 293 197 96 107 0 357 14 vmsppl 272 6269 0 6255 4 3 1 2 0 8 0 pdppl 4096 12546 0 12510 7 2 5 6 0 8 0 pvpl 32 1500989 0 1485332 381 246 135 254 0 265 2 pmappl 200 6269 0 6255 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 627 0 105 15 0 15 15 0 8 0