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(7df669db6a13b885,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d73ba0,ffff800017735358) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d72240,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d72240,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d72200,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d721e0,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d721a0,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72180,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72140,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72120,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72100,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d720e0,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d720c0,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d720a0,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72080,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72060,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72020,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72000,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72040,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72160,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d721c0,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72220,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d722a0,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72300,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72320,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72340,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72380,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d723a0,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d723c0,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72420,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72440,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72480,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d724c0,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d724e0,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d72f60,ffffffff814b1de0,ffff800017735358) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff814b1de0,ffff800017735358) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81fe6690,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd803ce5a780) at ip6_mrouter_done+0xb5 rip6_detach(fffffd803ce5a780) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd803ce5a780,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd802eef3528,ffff800014915160) at soo_close+0x40 fdrop(fffffd802eef3528,ffff800014915160) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802eef3528,ffff800014915160) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff800014915160) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff800014915160,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff800014915160,ffff8000177357f0,ffff800017735840) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff8000177358c0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7fffff5234) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff5200, count: -47 ddb> show registers rdi 0x7df669db6a13b885 rsi 0 rbp 0xffff800017734090 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x80e28e4cd37524eb r12 0 r13 0xfffffd8036d72240 r14 0 r15 0x7df669db6a13b885 rip 0xffffffff81fe66bb mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800017734050 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=216011 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800014914508,0xffff800014914ef8 process=0xffff8000ffff6d90 user=0xffff800017730000, vmspace=0xfffffd803f013330 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 8421 354897 51154 0 2 0 syz-executor.1 8421 497684 51154 0 3 0x4000080 fsleep syz-executor.1 45874 296378 41991 0 3 0x82 nanosleep syz-executor.0 69842 57010 1 0 3 0x100083 ttyin getty 51154 58552 41991 0 3 0x82 nanosleep syz-executor.1 1031 90456 0 0 3 0x14200 bored sosplice 41991 171454 54417 0 3 0x82 thrsleep syz-fuzzer 41991 176977 54417 0 3 0x4000082 thrsleep syz-fuzzer 41991 302401 54417 0 3 0x4000082 thrsleep syz-fuzzer 41991 476466 54417 0 3 0x4000082 thrsleep syz-fuzzer 41991 169965 54417 0 3 0x4000082 thrsleep syz-fuzzer 41991 283998 54417 0 3 0x4000082 kqread syz-fuzzer 41991 467792 54417 0 3 0x4000082 thrsleep syz-fuzzer 54417 490958 19445 0 3 0x10008a pause ksh 19445 25360 5628 0 3 0x92 select sshd 5628 139742 1 0 3 0x80 select sshd 26256 280142 49964 73 3 0x100090 kqread syslogd 49964 392581 1 0 3 0x100082 netio syslogd 66928 185888 1 77 3 0x100090 poll dhclient 80392 437307 1 0 3 0x80 poll dhclient 47863 18909 0 0 2 0x14200 zerothread 86356 399574 0 0 3 0x14200 aiodoned aiodoned 52592 50079 0 0 3 0x14200 syncer update 54556 500151 0 0 3 0x14200 cleaner cleaner 59696 148976 0 0 3 0x14200 reaper reaper 94906 418944 0 0 3 0x14200 pgdaemon pagedaemon 80750 351616 0 0 3 0x14200 bored crynlk 44694 165241 0 0 3 0x14200 bored crypto 15035 468830 0 0 3 0x40014200 acpi0 acpi0 63094 404276 0 0 3 0x14200 bored softnet 96026 89281 0 0 2 0x14200 systqmp 53379 91298 0 0 3 0x14200 bored systq 38554 341460 0 0 3 0x40014200 bored softclock 61900 248084 0 0 3 0x40014200 idle0 7626 240566 0 0 3 0x14200 bored smr 1 419835 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 9578 6509K 8395K 78643K 65663 0 0 pcb 16 8K 8K 78643K 1031 0 0 rtable 118 12K 12K 78643K 3016 0 0 ifaddr 77 18K 19K 78643K 1002 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 321 0 0 iov 0 0K 34K 78643K 7220 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1231 77K 78K 78643K 17494 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 152 0 0 VM map 2 0K 0K 78643K 20 0 0 sem 12 0K 0K 78643K 1101 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 6 17K 25K 78643K 9329 0 0 sigio 1 0K 0K 78643K 92 0 0 proc 50 38K 63K 78643K 2703 0 0 subproc 32 2K 2K 78643K 641 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 956 0 0 in_multi 33 2K 2K 78643K 722 0 0 ether_multi 2 0K 0K 78643K 53 0 0 mrt 2 0K 0K 78643K 19 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 1509 0 0 pfkey data 0 0K 4K 78643K 6 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 122 22K 31K 78643K 23723 0 0 UVM aobj 130 4K 4K 78643K 146 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 1069 0 0 NDP 18 0K 1K 78643K 318 0 0 temp 212 3540K 4164K 78643K 243823 0 0 kqueue 0 0K 0K 78643K 63 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 85 0 79 1 0 1 1 0 8 0 rtpcb 80 418 0 416 1 0 1 1 0 8 0 rtentry 112 399 0 355 2 0 2 2 0 8 0 unpcb 120 3441 0 3433 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 8278 0 8278 1 1 0 1 0 8 0 tcpcb 544 1873 0 1869 1 0 1 1 0 8 0 ipq 40 28 0 28 13 13 0 1 0 8 0 ipqe 40 66 0 66 13 13 0 1 0 8 0 inpcb 280 5318 0 5307 16 15 1 2 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 68 0 64 1 0 1 1 0 8 0 pkpcb 40 44 0 44 16 16 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 137 0 137 30 29 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1682 0 1464 16 2 14 15 0 8 0 art_table 32 1683 0 1464 2 0 2 2 0 8 0 art_node 16 386 0 345 1 0 1 1 0 8 0 sysvmsgpl 40 26 0 20 1 0 1 1 0 8 0 semapl 112 1099 0 1089 1 0 1 1 0 8 0 shmpl 112 144 0 16 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 15734 0 14326 46 0 46 46 0 8 0 ffsino 240 15734 0 14326 84 0 84 84 0 8 0 nchpl 144 32118 0 30460 63 1 62 62 0 8 0 uvmvnodes 72 7626 0 0 139 0 139 139 0 8 0 vnodes 208 7626 0 0 402 0 402 402 0 8 0 namei 1024 117709 0 117709 5 4 1 1 0 8 1 vmpool 520 18 0 18 7 7 0 1 0 8 0 scsiplug 64 16 0 16 14 14 0 1 0 8 0 scxspl 192 86899 0 86899 32 31 1 7 0 8 1 plimitpl 152 746 0 739 1 0 1 1 0 8 0 sigapl 432 9403 0 9389 2 0 2 2 0 8 0 futexpl 56 217047 0 217046 4 3 1 1 0 8 0 knotepl 112 2132 0 2113 1 0 1 1 0 8 0 kqueuepl 104 2108 0 2106 1 0 1 1 0 8 0 pipepl 112 4730 0 4711 14 13 1 2 0 8 0 fdescpl 424 9404 0 9389 2 0 2 2 0 8 0 filepl 120 76346 0 76247 16 11 5 6 0 8 1 lockfpl 104 2992 0 2991 1 0 1 1 0 8 0 lockfspl 48 1009 0 1008 1 0 1 1 0 8 0 sessionpl 112 60 0 50 1 0 1 1 0 8 0 pgrppl 48 122 0 112 1 0 1 1 0 8 0 ucredpl 96 14686 0 14677 1 0 1 1 0 8 0 zombiepl 144 9392 0 9391 3 2 1 1 0 8 0 processpl 864 9421 0 9391 4 0 4 4 0 8 0 procpl 632 21222 0 21185 5 1 4 5 0 8 0 sosppl 128 96 0 96 30 29 1 1 0 8 1 sockpl 384 9320 0 9299 15 12 3 4 0 8 0 mcl64k 65536 1534 0 1534 149 148 1 64 0 8 1 mcl16k 16384 64 0 64 33 33 0 1 0 8 0 mcl12k 12288 195 0 195 36 35 1 1 0 8 1 mcl9k 9216 98 0 98 38 37 1 1 0 8 1 mcl8k 8192 238 0 238 29 29 0 1 0 8 0 mcl4k 4096 903 0 903 8 7 1 1 0 8 1 mcl2k2 2112 86 0 86 37 37 0 1 0 8 0 mcl2k 2048 70428 0 70392 25 19 6 12 0 8 1 mtagpl 80 296 0 279 5 4 1 1 0 8 0 mbufpl 256 184885 0 184780 137 127 10 38 0 8 0 bufpl 256 32923 0 25300 477 0 477 477 0 8 0 anonpl 16 953491 0 940638 318 252 66 72 0 62 7 amapchunkpl 152 42745 0 42637 81 75 6 15 0 158 0 amappl16 192 51879 0 51116 373 326 47 51 0 8 8 amappl15 184 1627 0 1626 4 3 1 1 0 8 0 amappl14 176 2564 0 2559 1 0 1 1 0 8 0 amappl13 168 1894 0 1893 1 0 1 1 0 8 0 amappl12 160 510 0 508 1 0 1 1 0 8 0 amappl11 152 1641 0 1630 1 0 1 1 0 8 0 amappl10 144 585 0 583 8 7 1 1 0 8 0 amappl9 136 1471 0 1465 1 0 1 1 0 8 0 amappl8 128 988 0 945 2 0 2 2 0 8 0 amappl7 120 763 0 756 1 0 1 1 0 8 0 amappl6 112 1586 0 1574 1 0 1 1 0 8 0 amappl5 104 946 0 935 1 0 1 1 0 8 0 amappl4 96 8042 0 8015 1 0 1 1 0 8 0 amappl3 88 5170 0 5159 1 0 1 1 0 8 0 amappl2 80 74525 0 74447 3 1 2 3 0 8 0 amappl1 72 176808 0 176382 28 19 9 20 0 8 0 amappl 80 22032 0 21993 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 64 145 0 16 3 0 3 3 0 8 0 uaddrrnd 24 9422 0 9389 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9422 0 9389 1 0 1 1 0 8 0 vmmpekpl 168 54233 0 54204 2 0 2 2 0 8 0 vmmpepl 168 1107304 0 1105363 545 436 109 114 0 357 21 vmsppl 272 9403 0 9389 5 4 1 2 0 8 0 pdppl 4096 18850 0 18814 6 1 5 6 0 8 0 pvpl 32 2501613 0 2485560 632 466 166 230 0 265 25 pmappl 200 9421 0 9407 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 981 0 376 20 1 19 20 0 8 0