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(73503cc9d087321c,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d6ca30,ffff8000159361c8) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d6b2c0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d6b2c0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d6b1c0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b0c0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b0a0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b080,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b060,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b020,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b000,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b040,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b0e0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b100,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b120,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b140,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b160,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b180,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b1a0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b1e0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b200,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b220,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b240,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b260,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b280,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b2a0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b360,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b3a0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b3e0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b460,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b480,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b4c0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b4e0,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b500,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6bf60,ffffffff814b1de0,ffff8000159361c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff814b1de0,ffff8000159361c8) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81fe6690,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd8038883a80) at ip6_mrouter_done+0xb5 rip6_detach(fffffd8038883a80) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd8038883a80,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd802f082358,ffff8000ffff2290) at soo_close+0x40 fdrop(fffffd802f082358,ffff8000ffff2290) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802f082358,ffff8000ffff2290) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff2290) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff2290,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff2290,ffff800015936660,ffff8000159366b0) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800015936730) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffefb94) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffefb60, count: -47 ddb> show registers rdi 0x73503cc9d087321c rsi 0 rbp 0xffff800015934f00 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x25560b9b72071d2 r12 0 r13 0xfffffd8036d6b2c0 r14 0 r15 0x73503cc9d087321c rip 0xffffffff81fe66bb mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800015934ec0 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.1) pid=171309 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2c70,0xffffffff8256d418 process=0xffff8000ffff66d0 user=0xffff800015931000, vmspace=0xfffffd803f013440 estcpu=36, cpticks=6, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 97803 459240 75479 0 3 0x82 nanosleep syz-executor.0 25998 191697 75479 0 3 0x82 nanosleep syz-executor.1 6503 38554 1 0 3 0x100083 ttyin getty 46737 244438 0 0 3 0x14200 bored sosplice 75479 236906 25614 0 3 0x82 thrsleep syz-fuzzer 75479 180724 25614 0 3 0x4000082 thrsleep syz-fuzzer 75479 36762 25614 0 3 0x4000082 thrsleep syz-fuzzer 75479 250461 25614 0 3 0x4000082 thrsleep syz-fuzzer 75479 358136 25614 0 3 0x4000082 kqread syz-fuzzer 75479 105429 25614 0 3 0x4000082 thrsleep syz-fuzzer 75479 508465 25614 0 3 0x4000082 thrsleep syz-fuzzer 25614 204398 59196 0 3 0x10008a pause ksh 59196 297742 48436 0 3 0x92 select sshd 48436 205101 1 0 3 0x80 select sshd 83271 108986 72167 73 3 0x100090 kqread syslogd 72167 375623 1 0 3 0x100082 netio syslogd 7017 450435 1 77 3 0x100090 poll dhclient 42045 293364 1 0 3 0x80 poll dhclient 47347 524103 0 0 2 0x14200 zerothread 37014 368582 0 0 3 0x14200 aiodoned aiodoned 54660 386059 0 0 3 0x14200 syncer update 4934 248435 0 0 3 0x14200 cleaner cleaner 47783 206290 0 0 3 0x14200 reaper reaper 58212 22024 0 0 3 0x14200 pgdaemon pagedaemon 98374 167569 0 0 3 0x14200 bored crynlk 81653 139735 0 0 3 0x14200 bored crypto 33574 113250 0 0 3 0x40014200 acpi0 acpi0 97661 158208 0 0 3 0x14200 bored softnet 76055 289262 0 0 2 0x14200 systqmp 33010 509627 0 0 3 0x14200 bored systq 85853 161938 0 0 3 0x40014200 bored softclock 15780 305848 0 0 3 0x40014200 idle0 68634 522690 0 0 3 0x14200 bored smr 1 480359 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 9533 6366K 7104K 78643K 16688 0 0 pcb 15 8K 8K 78643K 273 0 0 rtable 115 4K 4K 78643K 905 0 0 ifaddr 67 15K 16K 78643K 306 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 98 0 0 iov 0 0K 16K 78643K 259 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1217 76K 77K 78643K 3520 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 9K 78643K 38 0 0 VM map 2 0K 0K 78643K 4 0 0 sem 12 0K 0K 78643K 335 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 2418 0 0 sigio 0 0K 0K 78643K 38 0 0 proc 50 38K 63K 78643K 916 0 0 subproc 32 2K 2K 78643K 153 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 232 0 0 in_multi 33 2K 2K 78643K 203 0 0 ether_multi 2 0K 0K 78643K 12 0 0 mrt 2 0K 0K 78643K 9 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 66 291K 291K 78643K 66 0 0 exec 0 0K 1K 78643K 461 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 101 21K 31K 78643K 6557 0 0 UVM aobj 125 4K 4K 78643K 137 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 230 0 0 NDP 15 0K 0K 78643K 92 0 0 temp 191 3540K 3611K 78643K 38659 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 21 0 14 1 0 1 1 0 8 0 rtpcb 80 153 0 151 1 0 1 1 0 8 0 rtentry 112 123 0 78 2 0 2 2 0 8 0 unpcb 120 1208 0 1200 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 6200 0 6200 1 1 0 1 0 8 0 tcpcb 544 511 0 507 1 0 1 1 0 8 0 inpcb 280 1417 0 1406 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 18 0 14 1 0 1 1 0 8 0 pkpcb 40 10 0 10 5 4 1 1 0 8 1 ppxss 1128 43 0 43 8 7 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 536 0 316 14 0 14 14 0 8 0 art_table 32 537 0 316 2 0 2 2 0 8 0 art_node 16 116 0 74 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 12 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 333 0 323 1 0 1 1 0 8 0 shmpl 112 135 0 12 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 5121 0 3734 46 0 46 46 0 8 0 ffsino 240 5121 0 3734 83 0 83 83 0 8 0 nchpl 144 10133 0 8513 61 0 61 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 31485 0 31485 3 2 1 1 0 8 1 vmpool 520 2 0 2 1 1 0 1 0 8 0 scsiplug 64 4 0 4 3 3 0 1 0 8 0 scxspl 192 26010 0 26010 12 11 1 7 0 8 1 plimitpl 152 209 0 202 1 0 1 1 0 8 0 sigapl 432 2570 0 2557 2 0 2 2 0 8 0 futexpl 56 51251 0 51251 2 1 1 1 0 8 1 knotepl 112 505 0 486 1 0 1 1 0 8 0 kqueuepl 104 521 0 519 1 0 1 1 0 8 0 pipepl 112 1358 0 1339 6 4 2 2 0 8 1 fdescpl 424 2571 0 2557 2 0 2 2 0 8 0 filepl 120 19985 0 19888 5 1 4 5 0 8 0 lockfpl 104 774 0 773 1 0 1 1 0 8 0 lockfspl 48 257 0 256 1 0 1 1 0 8 0 sessionpl 112 26 0 16 1 0 1 1 0 8 0 pgrppl 48 184 0 174 1 0 1 1 0 8 0 ucredpl 96 3032 0 3025 1 0 1 1 0 8 0 zombiepl 144 2560 0 2558 2 1 1 1 0 8 0 processpl 864 2588 0 2558 4 0 4 4 0 8 0 procpl 632 5498 0 5462 4 0 4 4 0 8 0 sosppl 128 32 0 32 7 6 1 1 0 8 1 sockpl 384 2816 0 2797 8 5 3 4 0 8 1 mcl64k 65536 78 0 78 7 6 1 1 0 8 1 mcl16k 16384 13 0 13 10 9 1 1 0 8 1 mcl12k 12288 43 0 43 11 10 1 1 0 8 1 mcl9k 9216 36 0 36 7 6 1 1 0 8 1 mcl8k 8192 53 0 53 7 6 1 1 0 8 1 mcl4k 4096 171 0 169 3 2 1 1 0 8 0 mcl2k2 2112 14 0 14 8 7 1 1 0 8 1 mcl2k 2048 58729 0 58687 21 15 6 19 0 8 0 mtagpl 80 85 0 83 2 1 1 1 0 8 0 mbufpl 256 108044 0 107962 19 8 11 12 0 8 3 bufpl 256 12494 0 7077 339 0 339 339 0 8 0 anonpl 16 226553 0 213766 116 60 56 72 0 62 0 amapchunkpl 152 10912 0 10808 25 20 5 12 0 158 0 amappl16 192 12188 0 11423 88 48 40 51 0 8 1 amappl14 176 363 0 360 1 0 1 1 0 8 0 amappl13 168 743 0 741 1 0 1 1 0 8 0 amappl12 160 284 0 281 1 0 1 1 0 8 0 amappl11 152 560 0 549 1 0 1 1 0 8 0 amappl10 144 354 0 352 2 1 1 1 0 8 0 amappl9 136 818 0 811 1 0 1 1 0 8 0 amappl8 128 375 0 347 1 0 1 1 0 8 0 amappl7 120 398 0 394 1 0 1 1 0 8 0 amappl6 112 564 0 552 1 0 1 1 0 8 0 amappl5 104 478 0 467 1 0 1 1 0 8 0 amappl4 96 2477 0 2451 1 0 1 1 0 8 0 amappl3 88 812 0 805 1 0 1 1 0 8 0 amappl2 80 20065 0 20000 3 1 2 3 0 8 0 amappl1 72 54593 0 54180 28 19 9 20 0 8 0 amappl 80 5835 0 5799 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 64 136 0 12 2 0 2 2 0 8 0 uaddrrnd 24 2573 0 2557 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2573 0 2557 1 0 1 1 0 8 0 vmmpekpl 168 18352 0 18326 2 0 2 2 0 8 0 vmmpepl 168 304708 0 302889 225 118 107 112 0 357 23 vmsppl 272 2570 0 2557 3 2 1 2 0 8 0 pdppl 4096 5152 0 5118 6 1 5 6 0 8 0 pvpl 32 638639 0 622850 258 123 135 173 0 265 1 pmappl 200 2572 0 2559 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 522 0 53 14 0 14 14 0 8 0