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(56032931ba84e280,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d6cc80,ffff800016b25fa8) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d6b2c0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d6b2c0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d6b2a0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b280,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b1a0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b180,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b160,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b120,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b0e0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b0c0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b0a0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b060,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b020,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b000,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b040,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b080,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b100,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b140,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b1c0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b1e0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b200,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b220,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b240,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b260,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b320,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b340,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b3a0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b4a0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b4c0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b4e0,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b500,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6b540,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6bf60,ffffffff82138a50,ffff800016b25fa8) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff82138a50,ffff800016b25fa8) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81175a00,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd803da8b780) at ip6_mrouter_done+0xb5 rip6_detach(fffffd803da8b780) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd803da8b780,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd802ee4a178,ffff8000ffff2018) at soo_close+0x40 fdrop(fffffd802ee4a178,ffff8000ffff2018) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802ee4a178,ffff8000ffff2018) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff2018) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff2018,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff2018,ffff800016b26440,ffff800016b26490) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800016b26510) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffc4064) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc4030, count: -47 ddb> show registers rdi 0x56032931ba84e280 rsi 0 rbp 0xffff800016b24ce0 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x992d40c787b1af8d r12 0 r13 0xfffffd8036d6b2c0 r14 0 r15 0x56032931ba84e280 rip 0xffffffff81175a2b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800016b24ca0 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.1) pid=198815 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff3b40,0xffffffff8256a900 process=0xffff8000ffff6010 user=0xffff800016b21000, vmspace=0xfffffd803f014220 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 43387 371980 0 0 3 0x14200 bored sosplice 41194 368339 26709 0 2 0x2 syz-executor.0 42559 267047 26709 0 3 0x82 nanosleep syz-executor.1 26709 120 10497 0 3 0x82 thrsleep syz-fuzzer 26709 72143 10497 0 3 0x4000082 nanosleep syz-fuzzer 26709 41091 10497 0 3 0x4000082 thrsleep syz-fuzzer 26709 394599 10497 0 3 0x4000082 thrsleep syz-fuzzer 26709 226456 10497 0 3 0x4000082 kqread syz-fuzzer 26709 51948 10497 0 3 0x4000082 thrsleep syz-fuzzer 26709 423464 10497 0 3 0x4000082 thrsleep syz-fuzzer 10497 215611 81340 0 3 0x10008a pause ksh 81340 351872 51686 0 3 0x92 select sshd 85677 199035 1 0 3 0x100083 ttyin getty 51686 357676 1 0 3 0x80 select sshd 51578 73471 67664 73 3 0x100090 kqread syslogd 67664 249383 1 0 3 0x100082 netio syslogd 84470 427415 1 77 3 0x100090 poll dhclient 37184 296563 1 0 3 0x80 poll dhclient 15824 211424 0 0 2 0x14200 zerothread 17727 329586 0 0 3 0x14200 aiodoned aiodoned 67474 311182 0 0 3 0x14200 syncer update 30167 483745 0 0 3 0x14200 cleaner cleaner 21299 30718 0 0 3 0x14200 reaper reaper 3866 491248 0 0 3 0x14200 pgdaemon pagedaemon 21980 187659 0 0 3 0x14200 bored crynlk 77853 494335 0 0 3 0x14200 bored crypto 14993 489168 0 0 3 0x40014200 acpi0 acpi0 45432 333638 0 0 3 0x14200 bored softnet 60854 21000 0 0 2 0x14200 systqmp 3238 320729 0 0 3 0x14200 bored systq 31087 506477 0 0 3 0x40014200 bored softclock 4619 518431 0 0 3 0x40014200 idle0 86154 8253 0 0 3 0x14200 bored smr 1 411141 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 9465 6446K 6699K 78643K 10756 0 0 pcb 15 8K 8K 78643K 31 0 0 rtable 86 2K 3K 78643K 204 0 0 ifaddr 35 9K 9K 78643K 41 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 15 0 0 iov 0 0K 8K 78643K 10 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1216 76K 77K 78643K 1299 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 8 0K 0K 78643K 8 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 100 0 0 proc 48 38K 63K 78643K 353 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 22 1K 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 60 265K 265K 78643K 60 0 0 exec 0 0K 1K 78643K 191 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 84 20K 21K 78643K 1055 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 6 0K 0K 78643K 11 0 0 temp 101 3523K 3587K 78643K 9266 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 2 1 0 1 1 0 8 0 rtpcb 80 19 0 17 1 0 1 1 0 8 0 rtentry 112 46 0 12 2 0 2 2 0 8 0 unpcb 120 39 0 31 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 4600 0 4600 1 0 1 1 0 8 1 tcpcb 544 18 0 14 1 0 1 1 0 8 0 inpcb 280 60 0 51 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 4 0 2 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 212 0 43 14 0 14 14 0 8 1 art_table 32 213 0 43 2 0 2 2 0 8 0 art_node 16 45 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 6 1 0 1 1 0 8 0 semapl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1530 0 134 46 0 46 46 0 8 0 ffsino 240 1530 0 134 83 0 83 83 0 8 0 nchpl 144 1850 0 241 60 0 60 60 0 8 0 uvmvnodes 72 1628 0 0 30 0 30 30 0 8 0 vnodes 208 1628 0 0 86 0 86 86 0 8 0 namei 1024 4626 0 4625 3 2 1 1 0 8 0 scxspl 192 5119 0 5119 9 8 1 7 0 8 1 plimitpl 152 20 0 13 1 0 1 1 0 8 0 sigapl 432 271 0 258 2 0 2 2 0 8 0 futexpl 56 1235 0 1235 1 0 1 1 0 8 1 knotepl 112 63 0 44 1 0 1 1 0 8 0 kqueuepl 104 14 0 12 1 0 1 1 0 8 0 pipepl 112 178 0 159 2 1 1 1 0 8 0 fdescpl 424 272 0 258 2 0 2 2 0 8 0 filepl 120 1454 0 1355 4 0 4 4 0 8 1 lockfpl 104 27 0 26 1 0 1 1 0 8 0 lockfspl 48 10 0 9 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 96 184 0 177 1 0 1 1 0 8 0 zombiepl 144 259 0 258 3 2 1 1 0 8 0 processpl 864 287 0 258 4 0 4 4 0 8 0 procpl 632 382 0 347 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 384 118 0 99 3 0 3 3 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 2 0 2 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 1 0 1 1 0 1 1 0 8 1 mcl4k 4096 10 0 10 2 1 1 1 0 8 1 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 55448 0 55403 16 4 12 13 0 8 5 mtagpl 80 6 0 2 2 1 1 1 0 8 0 mbufpl 256 89849 0 89767 14 4 10 10 0 8 2 bufpl 256 6294 0 1457 303 0 303 303 0 8 0 anonpl 16 37079 0 25023 52 2 50 50 0 62 1 amapchunkpl 152 1245 0 1145 9 2 7 7 0 158 2 amappl16 192 1096 0 432 35 0 35 35 0 8 1 amappl14 176 32 0 26 2 1 1 1 0 8 0 amappl13 168 2 0 2 2 2 0 1 0 8 0 amappl12 160 43 0 39 1 0 1 1 0 8 0 amappl11 152 45 0 34 1 0 1 1 0 8 0 amappl10 144 6 0 6 1 1 0 1 0 8 0 amappl9 136 575 0 569 1 0 1 1 0 8 0 amappl8 128 136 0 117 1 0 1 1 0 8 0 amappl7 120 36 0 32 1 0 1 1 0 8 0 amappl6 112 74 0 66 1 0 1 1 0 8 0 amappl5 104 171 0 160 1 0 1 1 0 8 0 amappl4 96 449 0 423 1 0 1 1 0 8 0 amappl3 88 149 0 142 1 0 1 1 0 8 0 amappl2 80 1352 0 1284 4 2 2 3 0 8 0 amappl1 72 14590 0 14182 28 18 10 20 0 8 1 amappl 80 610 0 576 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 24 272 0 258 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 272 0 258 1 0 1 1 0 8 0 vmmpekpl 168 6136 0 6114 2 0 2 2 0 8 0 vmmpepl 168 38952 0 37259 119 20 99 99 0 357 25 vmsppl 272 271 0 258 2 0 2 2 0 8 1 pdppl 4096 550 0 516 6 0 6 6 0 8 1 pvpl 32 132822 0 117830 139 10 129 129 0 265 7 pmappl 200 271 0 258 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 452 0 13 13 0 13 13 0 8 0