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(6ba4da62fe80425e,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d639f0,ffff80001694e2d8) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d623c0,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d623c0,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d623a0,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62360,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62340,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62320,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62300,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62240,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62220,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62200,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d621e0,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d621c0,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62180,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62160,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62140,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62100,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d620e0,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d620c0,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d620a0,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62080,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62060,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62000,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62020,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62040,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62120,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d621a0,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62260,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62280,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d622a0,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d622c0,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d622e0,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62380,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d62f60,ffffffff81e4f840,ffff80001694e2d8) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff81e4f840,ffff80001694e2d8) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81e5e830,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd8037020c00) at ip6_mrouter_done+0xb5 rip6_detach(fffffd8037020c00) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd8037020c00,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd802ee32cb8,ffff8000ffff8ed8) at soo_close+0x40 fdrop(fffffd802ee32cb8,ffff8000ffff8ed8) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802ee32cb8,ffff8000ffff8ed8) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff8ed8) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff8ed8,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff8ed8,ffff80001694e770,ffff80001694e7c0) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff80001694e840) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffee544) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffee510, count: -47 ddb> show registers rdi 0x6ba4da62fe80425e rsi 0 rbp 0xffff80001694d010 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0xce3d10d9e2615010 r12 0 r13 0xfffffd8036d623c0 r14 0 r15 0x6ba4da62fe80425e rip 0xffffffff81e5e85b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001694cfd0 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.1) pid=6674 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff38c8,0xffffffff82588698 process=0xffff8000ffff7b10 user=0xffff800016949000, vmspace=0xfffffd803f014330 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 25048 235977 99772 0 3 0x82 nanosleep syz-executor.1 99506 383567 99772 0 2 0x2 syz-executor.0 22819 42432 0 0 3 0x14200 acct acct 11603 193650 0 0 3 0x14200 bored sosplice 99772 211655 36852 0 3 0x82 thrsleep syz-fuzzer 99772 65188 36852 0 3 0x4000082 nanosleep syz-fuzzer 99772 390355 36852 0 3 0x4000082 thrsleep syz-fuzzer 99772 172762 36852 0 3 0x4000082 thrsleep syz-fuzzer 99772 420048 36852 0 3 0x4000082 kqread syz-fuzzer 99772 29816 36852 0 3 0x4000082 thrsleep syz-fuzzer 99772 245264 36852 0 3 0x4000082 thrsleep syz-fuzzer 36852 85329 84223 0 3 0x10008a pause ksh 84223 267901 91484 0 3 0x92 select sshd 60655 438952 1 0 3 0x100083 ttyin getty 91484 245054 1 0 3 0x80 select sshd 39683 43266 16883 73 3 0x100090 kqread syslogd 16883 396010 1 0 3 0x100082 netio syslogd 79711 48852 1 77 3 0x100090 poll dhclient 2774 389871 1 0 3 0x80 poll dhclient 85465 394812 0 0 2 0x14200 zerothread 13888 341854 0 0 3 0x14200 aiodoned aiodoned 99323 279113 0 0 3 0x14200 syncer update 84062 11136 0 0 3 0x14200 cleaner cleaner 91769 506002 0 0 3 0x14200 reaper reaper 35249 507772 0 0 3 0x14200 pgdaemon pagedaemon 52768 235971 0 0 3 0x14200 bored crynlk 91819 420838 0 0 3 0x14200 bored crypto 73279 242061 0 0 3 0x40014200 acpi0 acpi0 96591 520151 0 0 3 0x14200 bored softnet 69371 454795 0 0 2 0x14200 systqmp 76355 455901 0 0 3 0x14200 bored systq 78842 313889 0 0 3 0x40014200 bored softclock 17899 56371 0 0 3 0x40014200 idle0 72432 18800 0 0 3 0x14200 bored smr 1 144678 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 9557 6382K 7324K 78643K 16026 0 0 pcb 15 8K 8K 78643K 223 0 0 rtable 111 3K 4K 78643K 912 0 0 ifaddr 73 16K 17K 78643K 290 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 133 0 0 iov 0 0K 32K 78643K 215 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1207 76K 77K 78643K 3387 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 27 0 0 VM map 2 0K 0K 78643K 6 0 0 sem 12 0K 1K 78643K 234 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 2264 0 0 sigio 0 0K 0K 78643K 40 0 0 proc 50 38K 63K 78643K 974 0 0 subproc 32 2K 2K 78643K 204 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 186 0 0 in_multi 33 2K 2K 78643K 196 0 0 ether_multi 1 0K 0K 78643K 4 0 0 mrt 1 0K 0K 78643K 5 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 90 397K 397K 78643K 90 0 0 exec 0 0K 1K 78643K 557 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 95 21K 26K 78643K 6189 0 0 UVM aobj 84 3K 3K 78643K 94 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 232 0 0 NDP 17 0K 0K 78643K 92 0 0 temp 204 3536K 3609K 78643K 56322 0 0 kqueue 0 0K 0K 78643K 14 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 28 0 21 1 0 1 1 0 8 0 rtpcb 80 125 0 123 1 0 1 1 0 8 0 rtentry 112 148 0 103 2 0 2 2 0 8 0 unpcb 120 659 0 651 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 6151 0 6151 1 1 0 1 0 8 0 tcpcb 544 422 0 418 1 0 1 1 0 8 0 inpcb 280 1186 0 1175 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 24 0 20 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 32 0 32 6 5 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 668 0 448 17 3 14 14 0 8 0 art_table 32 669 0 448 2 0 2 2 0 8 0 art_node 16 147 0 105 1 0 1 1 0 8 0 sysvmsgpl 40 23 0 12 1 0 1 1 0 8 0 semapl 112 232 0 222 1 0 1 1 0 8 0 shmpl 112 92 0 10 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 5031 0 3646 46 0 46 46 0 8 0 ffsino 240 5031 0 3646 83 0 83 83 0 8 0 nchpl 144 8255 0 6659 60 0 60 60 0 8 0 uvmvnodes 72 6289 0 0 115 0 115 115 0 8 0 vnodes 208 6289 0 0 331 0 331 331 0 8 0 namei 1024 26053 0 26053 3 2 1 1 0 8 1 vmpool 520 4 0 4 2 2 0 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 27126 0 27126 15 14 1 7 0 8 1 plimitpl 152 178 0 171 1 0 1 1 0 8 0 sigapl 432 2405 0 2392 2 0 2 2 0 8 0 futexpl 56 35137 0 35137 2 1 1 1 0 8 1 knotepl 112 566 0 547 1 0 1 1 0 8 0 kqueuepl 104 471 0 469 1 0 1 1 0 8 0 pipepl 112 1130 0 1111 1 0 1 1 0 8 0 fdescpl 424 2406 0 2392 2 0 2 2 0 8 0 filepl 120 13711 0 13614 5 1 4 4 0 8 1 lockfpl 104 706 0 705 1 0 1 1 0 8 0 lockfspl 48 245 0 244 1 0 1 1 0 8 0 sessionpl 112 27 0 17 1 0 1 1 0 8 0 pgrppl 48 47 0 37 1 0 1 1 0 8 0 ucredpl 96 2516 0 2509 1 0 1 1 0 8 0 zombiepl 144 2393 0 2392 2 1 1 1 0 8 0 processpl 864 2422 0 2392 4 0 4 4 0 8 0 procpl 632 5034 0 4998 4 0 4 4 0 8 0 sosppl 128 28 0 28 5 5 0 1 0 8 0 sockpl 384 1996 0 1977 8 5 3 3 0 8 1 mcl64k 65536 591 0 591 72 71 1 64 0 8 1 mcl16k 16384 6 0 6 4 4 0 1 0 8 0 mcl12k 12288 47 0 47 7 6 1 1 0 8 1 mcl9k 9216 36 0 36 8 8 0 1 0 8 0 mcl8k 8192 30 0 30 8 7 1 1 0 8 1 mcl4k 4096 130 0 128 4 3 1 1 0 8 0 mcl2k2 2112 8 0 8 5 5 0 1 0 8 0 mcl2k 2048 50695 0 50648 19 12 7 14 0 8 0 mtagpl 80 78 0 67 2 1 1 1 0 8 0 mbufpl 256 95316 0 95156 49 38 11 37 0 8 0 bufpl 256 12133 0 5825 395 0 395 395 0 8 0 anonpl 16 231905 0 221083 111 55 56 68 0 62 1 amapchunkpl 152 11425 0 11325 43 25 18 18 0 158 13 amappl16 192 12044 0 11344 119 83 36 48 0 8 0 amappl15 184 837 0 835 3 2 1 1 0 8 0 amappl14 176 376 0 372 1 0 1 1 0 8 0 amappl13 168 2 0 2 2 2 0 1 0 8 0 amappl12 160 210 0 207 1 0 1 1 0 8 0 amappl11 152 274 0 261 1 0 1 1 0 8 0 amappl10 144 10 0 9 1 0 1 1 0 8 0 amappl9 136 1284 0 1277 1 0 1 1 0 8 0 amappl8 128 814 0 791 1 0 1 1 0 8 0 amappl7 120 101 0 93 1 0 1 1 0 8 0 amappl6 112 265 0 257 1 0 1 1 0 8 0 amappl5 104 416 0 405 1 0 1 1 0 8 0 amappl4 96 2231 0 2206 1 0 1 1 0 8 0 amappl3 88 876 0 871 1 0 1 1 0 8 0 amappl2 80 18470 0 18402 3 1 2 3 0 8 0 amappl1 72 51829 0 51421 28 19 9 20 0 8 0 amappl 80 5423 0 5389 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 93 0 10 2 0 2 2 0 8 0 uaddrrnd 24 2410 0 2392 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2410 0 2392 1 0 1 1 0 8 0 vmmpekpl 168 17050 0 17025 2 0 2 2 0 8 0 vmmpepl 168 285995 0 284251 237 136 101 101 0 357 22 vmsppl 272 2405 0 2392 2 1 1 2 0 8 0 pdppl 4096 4826 0 4792 6 1 5 6 0 8 0 pvpl 32 749256 0 735367 332 186 146 252 0 265 15 pmappl 200 2409 0 2396 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 669 0 144 17 1 16 17 0 8 0