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(a8688aadb254b7df,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d73c60,ffff800015939f38) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d72280,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d72280,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d72240,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72200,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d721e0,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72180,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72160,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72100,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d720c0,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72060,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72040,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72020,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72000,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72080,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d720a0,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d720e0,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72120,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72140,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d721a0,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d721c0,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72220,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72260,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d722e0,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72340,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72360,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72400,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d724c0,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72500,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72520,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72540,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72580,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d725c0,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72f60,ffffffff814f7bd0,ffff800015939f38) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff814f7bd0,ffff800015939f38) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff819969d0,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd803b820480) at ip6_mrouter_done+0xb5 rip6_detach(fffffd803b820480) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd803b820480,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd803621de18,ffff8000ffff3b40) at soo_close+0x40 fdrop(fffffd803621de18,ffff8000ffff3b40) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd803621de18,ffff8000ffff3b40) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff3b40) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff3b40,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff3b40,ffff80001593a3d0,ffff80001593a420) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff80001593a4a0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffd8e84) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd8e50, count: -47 ddb> show registers rdi 0xa8688aadb254b7df rsi 0 rbp 0xffff800015938c70 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0xc36e8bf47d85c10a r12 0 r13 0xfffffd8036d72280 r14 0 r15 0xa8688aadb254b7df rip 0xffffffff819969fb mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800015938c30 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=335210 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff38c8,0xffffffff82581628 process=0xffff8000148a26d8 user=0xffff800015935000, vmspace=0xfffffd803f014110 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 17242 372546 93356 0 3 0x82 nanosleep syz-executor.0 64964 329396 93356 0 3 0x82 piperd syz-executor.1 51549 335999 1 0 3 0x100083 ttyin getty 26032 98165 0 0 3 0x14200 acct acct 47261 105282 0 0 3 0x14200 bored sosplice 93356 40425 39032 0 3 0x82 thrsleep syz-fuzzer 93356 487554 39032 0 3 0x4000082 nanosleep syz-fuzzer 93356 318329 39032 0 3 0x4000082 kqread syz-fuzzer 93356 356472 39032 0 3 0x4000082 thrsleep syz-fuzzer 93356 297617 39032 0 3 0x4000082 thrsleep syz-fuzzer 93356 458831 39032 0 3 0x4000082 thrsleep syz-fuzzer 93356 345375 39032 0 3 0x4000082 thrsleep syz-fuzzer 39032 213630 85654 0 3 0x10008a pause ksh 85654 490380 60941 0 3 0x92 select sshd 60941 281299 1 0 3 0x80 select sshd 97631 357139 65099 73 3 0x100090 kqread syslogd 65099 317232 1 0 3 0x100082 netio syslogd 27570 42100 1 77 3 0x100090 poll dhclient 73984 494797 1 0 3 0x80 poll dhclient 59320 228069 0 0 2 0x14200 zerothread 77937 408304 0 0 3 0x14200 aiodoned aiodoned 15204 156308 0 0 3 0x14200 syncer update 31623 431778 0 0 3 0x14200 cleaner cleaner 57204 30972 0 0 3 0x14200 reaper reaper 42643 300335 0 0 3 0x14200 pgdaemon pagedaemon 54861 195575 0 0 3 0x14200 bored crynlk 81966 372068 0 0 3 0x14200 bored crypto 69082 290715 0 0 3 0x40014200 acpi0 acpi0 67618 283381 0 0 3 0x14200 bored softnet 36045 261154 0 0 2 0x14200 systqmp 18565 149772 0 0 3 0x14200 bored systq 68324 241491 0 0 3 0x40014200 bored softclock 75031 198371 0 0 3 0x40014200 idle0 33322 323014 0 0 3 0x14200 bored smr 1 74895 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 9553 6366K 7356K 78643K 23391 0 0 pcb 15 8K 8K 78643K 568 0 0 rtable 96 11K 12K 78643K 1777 0 0 ifaddr 67 17K 20K 78643K 591 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 310 0 0 iov 0 0K 16K 78643K 418 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1210 76K 77K 78643K 5933 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 71 0 0 VM map 2 0K 0K 78643K 14 0 0 sem 12 0K 0K 78643K 549 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 5071 0 0 sigio 0 0K 0K 78643K 67 0 0 proc 49 38K 63K 78643K 1661 0 0 subproc 32 2K 2K 78643K 363 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 434 0 0 in_multi 22 1K 2K 78643K 369 0 0 ether_multi 2 0K 0K 78643K 16 0 0 mrt 2 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 102 450K 450K 78643K 102 0 0 exec 0 0K 1K 78643K 886 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 100 21K 30K 78643K 12825 0 0 UVM aobj 130 5K 5K 78643K 157 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 493 0 0 NDP 18 0K 0K 78643K 184 0 0 temp 199 3540K 4165K 78643K 106024 0 0 kqueue 0 0K 0K 78643K 28 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 47 0 43 1 0 1 1 0 8 0 rtpcb 80 274 0 272 1 0 1 1 0 8 0 rtentry 112 249 0 215 2 0 2 2 0 8 0 unpcb 120 1655 0 1647 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 3 0 3 3 3 0 1 0 8 0 tcpqe 32 2395 0 2395 1 1 0 1 0 8 0 tcpcb 544 881 0 877 1 0 1 1 0 8 0 ipq 40 18 0 18 6 5 1 1 0 8 1 ipqe 40 44 0 44 6 5 1 1 0 8 1 inpcb 280 2719 0 2710 7 5 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 42 0 40 1 0 1 1 0 8 0 pkpcb 40 18 0 18 7 7 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 89 0 89 14 13 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1078 0 907 17 3 14 14 0 8 3 art_table 32 1079 0 907 2 0 2 2 0 8 0 art_node 16 238 0 206 1 0 1 1 0 8 0 sysvmsgpl 40 36 0 21 2 1 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 545 0 535 1 0 1 1 0 8 0 shmpl 112 155 0 27 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 9190 0 7799 46 0 46 46 0 8 0 ffsino 240 9190 0 7799 83 0 83 83 0 8 0 nchpl 144 16435 0 14838 60 0 60 60 0 8 0 uvmvnodes 72 7518 0 0 137 0 137 137 0 8 0 vnodes 208 7518 0 0 396 0 396 396 0 8 0 namei 1024 53845 0 53845 6 5 1 1 0 8 1 vmpool 520 12 0 12 6 5 1 1 0 8 1 scsiplug 64 8 0 8 5 5 0 1 0 8 0 scxspl 192 51555 0 51555 18 16 2 7 0 8 2 plimitpl 152 481 0 474 1 0 1 1 0 8 0 sigapl 432 5190 0 5177 2 0 2 2 0 8 0 futexpl 56 82068 0 82068 6 5 1 1 0 8 1 knotepl 112 1254 0 1235 2 1 1 2 0 8 0 kqueuepl 104 1054 0 1052 1 0 1 1 0 8 0 pipepl 112 2688 0 2669 6 5 1 2 0 8 0 fdescpl 424 5191 0 5177 2 0 2 2 0 8 0 filepl 120 30656 0 30559 8 4 4 5 0 8 1 lockfpl 104 1755 0 1754 1 0 1 1 0 8 0 lockfspl 48 576 0 575 1 0 1 1 0 8 0 sessionpl 112 41 0 31 1 0 1 1 0 8 0 pgrppl 48 105 0 95 1 0 1 1 0 8 0 ucredpl 96 5725 0 5718 1 0 1 1 0 8 0 zombiepl 144 5180 0 5179 2 1 1 1 0 8 0 processpl 864 5209 0 5179 4 0 4 4 0 8 0 procpl 632 11214 0 11178 4 0 4 4 0 8 0 sosppl 128 71 0 71 19 18 1 1 0 8 1 sockpl 384 4731 0 4712 9 6 3 4 0 8 1 mcl64k 65536 848 0 848 102 101 1 33 0 8 1 mcl16k 16384 21 0 21 13 12 1 1 0 8 1 mcl12k 12288 78 0 78 18 17 1 1 0 8 1 mcl9k 9216 60 0 60 16 16 0 1 0 8 0 mcl8k 8192 83 0 83 18 17 1 1 0 8 1 mcl4k 4096 251 0 251 4 3 1 1 0 8 1 mcl2k2 2112 34 0 34 12 11 1 1 0 8 1 mcl2k 2048 63428 0 63373 18 10 8 15 0 8 0 mtagpl 80 146 0 146 3 2 1 1 0 8 1 mbufpl 256 128738 0 128626 64 53 11 24 0 8 2 bufpl 256 20357 0 12803 474 1 473 473 0 8 0 anonpl 16 475780 0 465828 159 104 55 70 0 62 0 amapchunkpl 152 23193 0 23093 46 41 5 15 0 158 0 amappl16 192 26434 0 25723 147 110 37 48 0 8 0 amappl15 184 390 0 390 5 5 0 1 0 8 0 amappl14 176 155 0 150 1 0 1 1 0 8 0 amappl13 168 617 0 617 5 5 0 1 0 8 0 amappl12 160 438 0 438 2 2 0 1 0 8 0 amappl11 152 1050 0 1039 1 0 1 1 0 8 0 amappl10 144 1372 0 1369 1 0 1 1 0 8 0 amappl9 136 1342 0 1335 1 0 1 1 0 8 0 amappl8 128 823 0 795 1 0 1 1 0 8 0 amappl7 120 1477 0 1470 1 0 1 1 0 8 0 amappl6 112 1043 0 1035 1 0 1 1 0 8 0 amappl5 104 732 0 720 1 0 1 1 0 8 0 amappl4 96 5612 0 5586 1 0 1 1 0 8 0 amappl3 88 275 0 270 1 0 1 1 0 8 0 amappl2 80 40134 0 40067 3 1 2 3 0 8 0 amappl1 72 101157 0 100739 26 16 10 20 0 8 0 amappl 80 11740 0 11706 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 64 156 0 27 3 0 3 3 0 8 0 uaddrrnd 24 5203 0 5177 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5203 0 5177 1 0 1 1 0 8 0 vmmpekpl 168 32685 0 32655 2 0 2 2 0 8 0 vmmpepl 168 607138 0 605390 325 222 103 105 0 357 23 vmsppl 272 5190 0 5177 3 2 1 2 0 8 0 pdppl 4096 10412 0 10378 6 1 5 6 0 8 0 pvpl 32 1372454 0 1359429 471 262 209 272 0 265 77 pmappl 200 5202 0 5189 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 815 0 210 18 0 18 18 0 8 0