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(31958bb5371674a7,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd80370f4a20,ffff800015974088) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd80370f3120,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd80370f3120,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd80370f3100,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f30e0,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f30c0,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f30a0,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3040,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3020,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3000,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3060,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3080,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3140,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3160,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3180,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f31c0,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f31e0,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f32c0,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3320,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3340,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3360,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3380,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f33a0,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f33c0,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f33e0,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3420,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3480,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f34c0,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3520,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3580,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f35a0,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f35c0,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3620,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370f3f60,ffffffff814f7bd0,ffff800015974088) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff814f7bd0,ffff800015974088) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff819969d0,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd80363e2d88) at ip6_mrouter_done+0xb5 rip6_detach(fffffd80363e2d88) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd80363e2d88,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd802ee56e98,ffff8000ffff3b40) at soo_close+0x40 fdrop(fffffd802ee56e98,ffff8000ffff3b40) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802ee56e98,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,ffff800015974520,ffff800015974570) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff8000159745f0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffbe224) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbe1f0, count: -47 ddb> show registers rdi 0x31958bb5371674a7 rsi 0 rbp 0xffff800015972dc0 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0xae4f7deb5f2ccfbd r12 0 r13 0xfffffd80370f3120 r14 0 r15 0x31958bb5371674a7 rip 0xffffffff819969fb mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800015972d80 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=358684 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2508,0xffffffff82581628 process=0xffff8000ffff70f0 user=0xffff80001596f000, vmspace=0xfffffd803f014440 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 38038 349709 32707 0 3 0x80 nanosleep syz-executor.1 38038 515390 32707 0 3 0x4000080 semwait syz-executor.1 38038 357033 32707 0 3 0x4000080 fsleep syz-executor.1 95255 182914 63272 0 3 0x82 nanosleep syz-executor.0 32707 511729 63272 0 3 0x82 nanosleep syz-executor.1 63272 499077 33735 0 3 0x82 thrsleep syz-fuzzer 63272 424470 33735 0 3 0x4000082 thrsleep syz-fuzzer 63272 78984 33735 0 3 0x4000082 kqread syz-fuzzer 63272 226089 33735 0 3 0x4000082 thrsleep syz-fuzzer 63272 352658 33735 0 3 0x4000082 thrsleep syz-fuzzer 63272 467564 33735 0 3 0x4000082 thrsleep syz-fuzzer 63272 483026 33735 0 3 0x4000082 thrsleep syz-fuzzer 33735 79784 80229 0 3 0x10008a pause ksh 80229 22300 16970 0 3 0x92 select sshd 73038 427365 1 0 3 0x100083 ttyin getty 16970 418639 1 0 3 0x80 select sshd 82884 70604 28687 73 3 0x100090 kqread syslogd 28687 78448 1 0 3 0x100082 netio syslogd 43319 411118 1 77 3 0x100090 poll dhclient 8147 386230 1 0 3 0x80 poll dhclient 93544 63331 0 0 2 0x14200 zerothread 4895 513735 0 0 3 0x14200 aiodoned aiodoned 46790 12608 0 0 3 0x14200 syncer update 89576 419761 0 0 3 0x14200 cleaner cleaner 36906 506908 0 0 3 0x14200 reaper reaper 68504 16193 0 0 3 0x14200 pgdaemon pagedaemon 72062 521360 0 0 3 0x14200 bored crynlk 97369 84717 0 0 3 0x14200 bored crypto 29145 428453 0 0 3 0x40014200 acpi0 acpi0 95049 334212 0 0 3 0x14200 bored softnet 57298 347741 0 0 2 0x14200 systqmp 88061 327816 0 0 3 0x14200 bored systq 73746 392880 0 0 3 0x40014200 bored softclock 36728 39397 0 0 3 0x40014200 idle0 16046 283558 0 0 3 0x14200 bored smr 1 370104 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 9440 6312K 6698K 78643K 10608 0 0 pcb 15 8K 8K 78643K 21 0 0 rtable 109 3K 4K 78643K 203 0 0 ifaddr 35 10K 10K 78643K 39 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 19 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1218 77K 77K 78643K 1241 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 5 0K 0K 78643K 6 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 6 17K 25K 78643K 63 0 0 proc 47 38K 63K 78643K 355 0 0 subproc 32 2K 2K 78643K 34 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 33 2K 2K 78643K 33 0 0 ether_multi 2 0K 0K 78643K 2 0 0 mrt 2 0K 0K 78643K 3 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 30 132K 132K 78643K 30 0 0 exec 0 0K 1K 78643K 190 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 87 20K 21K 78643K 955 0 0 UVM aobj 2 2K 2K 78643K 2 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 4 0 0 NDP 5 0K 0K 78643K 10 0 0 temp 80 3524K 3588K 78643K 3577 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 6 0 0 1 0 1 1 0 8 0 rtpcb 80 19 0 17 1 0 1 1 0 8 0 rtentry 112 46 0 2 2 0 2 2 0 8 0 unpcb 120 41 0 33 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 2639 0 2639 1 0 1 1 0 8 1 tcpcb 544 14 0 10 1 0 1 1 0 8 0 ipq 40 2 0 2 1 0 1 1 0 8 1 ipqe 40 6 0 6 1 0 1 1 0 8 1 inpcb 280 48 0 39 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 213 0 0 14 0 14 14 0 8 0 art_table 32 214 0 0 2 0 2 2 0 8 0 art_node 16 45 0 4 1 0 1 1 0 8 0 semapl 112 4 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1462 0 64 46 0 46 46 0 8 0 ffsino 240 1462 0 64 83 0 83 83 0 8 0 nchpl 144 1746 0 134 60 0 60 60 0 8 0 uvmvnodes 72 1521 0 0 28 0 28 28 0 8 0 vnodes 208 1521 0 0 81 0 81 81 0 8 0 namei 1024 4234 0 4234 1 0 1 1 0 8 1 scxspl 192 4516 0 4516 2 1 1 2 0 8 1 plimitpl 152 18 0 11 1 0 1 1 0 8 0 sigapl 432 234 0 220 2 0 2 2 0 8 0 futexpl 56 573 0 572 1 0 1 1 0 8 0 knotepl 112 53 0 34 1 0 1 1 0 8 0 kqueuepl 104 5 0 2 1 0 1 1 0 8 0 pipepl 112 140 0 119 1 0 1 1 0 8 0 fdescpl 424 235 0 220 2 0 2 2 0 8 0 filepl 120 1179 0 1075 4 0 4 4 0 8 0 lockfpl 104 32 0 31 1 0 1 1 0 8 0 lockfspl 48 12 0 11 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 70 0 63 1 0 1 1 0 8 0 zombiepl 144 221 0 220 1 0 1 1 0 8 0 processpl 864 249 0 220 4 0 4 4 0 8 0 procpl 632 289 0 252 4 0 4 4 0 8 0 sockpl 384 108 0 89 3 0 3 3 0 8 1 mcl64k 65536 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 3 0 3 1 0 1 1 0 8 1 mcl4k 4096 11 0 11 2 1 1 1 0 8 1 mcl2k 2048 57743 0 57706 15 3 12 12 0 8 6 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 92390 0 92324 10 1 9 9 0 8 0 bufpl 256 6133 0 1357 299 0 299 299 0 8 0 anonpl 16 33526 0 21723 50 2 48 48 0 62 0 amapchunkpl 152 1004 0 896 8 1 7 7 0 158 2 amappl16 192 875 0 229 33 0 33 33 0 8 0 amappl14 176 51 0 44 1 0 1 1 0 8 0 amappl12 160 10 0 8 1 0 1 1 0 8 0 amappl11 152 66 0 52 1 0 1 1 0 8 0 amappl10 144 7 0 6 1 0 1 1 0 8 0 amappl9 136 562 0 556 1 0 1 1 0 8 0 amappl8 128 141 0 122 1 0 1 1 0 8 0 amappl7 120 36 0 32 1 0 1 1 0 8 0 amappl6 112 82 0 73 1 0 1 1 0 8 0 amappl5 104 174 0 163 1 0 1 1 0 8 0 amappl4 96 450 0 421 1 0 1 1 0 8 0 amappl3 88 111 0 104 1 0 1 1 0 8 0 amappl2 80 1088 0 1015 3 1 2 3 0 8 0 amappl1 72 13835 0 13413 27 15 12 20 0 8 3 amappl 80 509 0 471 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 235 0 220 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 235 0 220 1 0 1 1 0 8 0 vmmpekpl 168 5860 0 5837 2 0 2 2 0 8 0 vmmpepl 168 34975 0 33187 131 8 123 123 0 357 45 vmsppl 272 234 0 220 2 0 2 2 0 8 1 pdppl 4096 476 0 440 6 0 6 6 0 8 1 pvpl 32 121454 0 106645 126 2 124 124 0 265 4 pmappl 200 234 0 220 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 441 0 7 13 0 13 13 0 8 0