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(de20cf0ce549349a,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:500 rtable_walk_helper(fffffd8036dab9f0,ffff800016c067c8) at rtable_walk_helper+0x58 sys/net/rtable.c:682 art_table_walk(ffff800000075780,fffffd8036daa460,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075780,fffffd8036daa460,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075780,fffffd8036daa440,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa3e0,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa380,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa340,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa320,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa300,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa2e0,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa2c0,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa260,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa240,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa220,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa200,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa1e0,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa1c0,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa080,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa040,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa020,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa000,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa060,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa0a0,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa0c0,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa0e0,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa100,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa120,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa140,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa160,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa180,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa1a0,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa280,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daa2a0,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036daaf20,ffffffff81246360,ffff800016c067c8) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075780,ffffffff81246360,ffff800016c067c8) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,ffffffff815d1c50,0) at rtable_walk+0xc7 sys/net/rtable.c:706 ip6_mrouter_done(fffffd8036fe0a80) at ip6_mrouter_done+0xb8 sys/netinet6/ip6_mroute.c:529 rip6_detach(fffffd8036fe0a80) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd8036fe0a80,0) at soclose+0xb2 sys/kern/uipc_socket.c:292 soo_close(fffffd802fcedda8,ffff800014902388) at soo_close+0x40 fdrop(fffffd802fcedda8,ffff800014902388) at fdrop+0xc9 sys/kern/kern_descrip.c:1260 closef(fffffd802fcedda8,ffff800014902388) at closef+0x118 sys/kern/kern_descrip.c:1244 fdfree(ffff800014902388) at fdfree+0xf7 sys/kern/kern_descrip.c:1176 exit1(ffff800014902388,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff800014902388,ffff800016c06c40,ffff800016c06cb0) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800016c06d10) at syscall+0x508 Xsyscall(6,1,0,1,0,7f7ffffd65d4) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd65a0, count: -47 ddb> show registers rdi 0xde20cf0ce549349a rsi 0 rbp 0xffff800016c05500 rbx 0xffff800000075788 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x825e91a4971be263 r12 0 r13 0xfffffd8036daa460 r14 0 r15 0xde20cf0ce549349a rip 0xffffffff815d1c7b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800016c054c0 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.1) pid=25520 stat=onproc flags process=1008 proc=2000 pri=50, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff800014901008,0xffffffff8228c5c0 process=0xffff8000ffffad30 user=0xffff800016c01000, vmspace=0xfffffd803f013440 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 28710 94421 75288 0 3 0x82 nanosleep syz-executor.0 39725 451358 75288 0 3 0x82 nanosleep syz-executor.1 75288 319840 78208 0 3 0x82 thrsleep syz-fuzzer 75288 94119 78208 0 3 0x4000082 thrsleep syz-fuzzer 75288 43676 78208 0 3 0x4000082 thrsleep syz-fuzzer 75288 335792 78208 0 3 0x4000082 kqread syz-fuzzer 75288 261031 78208 0 3 0x4000082 thrsleep syz-fuzzer 75288 179011 78208 0 3 0x4000082 thrsleep syz-fuzzer 75288 91602 78208 0 3 0x4000082 thrsleep syz-fuzzer 78208 176511 55649 0 3 0x10008a pause ksh 55649 80379 85727 0 3 0x92 select sshd 80476 415935 1 0 3 0x100083 ttyin getty 85727 519853 1 0 3 0x80 select sshd 4662 63146 12215 73 3 0x100090 kqread syslogd 12215 306491 1 0 3 0x100082 netio syslogd 25150 338501 1 77 3 0x100090 poll dhclient 7644 355657 1 0 3 0x80 poll dhclient 71714 85170 0 0 2 0x14200 zerothread 66402 383470 0 0 3 0x14200 aiodoned aiodoned 96452 263254 0 0 3 0x14200 syncer update 71245 285755 0 0 3 0x14200 cleaner cleaner 71142 518851 0 0 3 0x14200 reaper reaper 3031 57250 0 0 3 0x14200 pgdaemon pagedaemon 80867 431660 0 0 3 0x14200 bored crynlk 13204 89382 0 0 3 0x14200 bored crypto 54855 177494 0 0 3 0x40014200 acpi0 acpi0 88834 289844 0 0 3 0x14200 bored softnet 81265 247471 0 0 2 0x14200 systqmp 35115 286832 0 0 3 0x14200 bored systq 95363 173538 0 0 3 0x40014200 bored softclock 35060 292031 0 0 3 0x40014200 idle0 45142 260991 0 0 3 0x14200 bored smr 1 334846 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 9441 6320K 6898K 78643K 10788 0 0 pcb 25 9K 10K 78643K 192 0 0 rtable 114 4K 4K 78643K 254 0 0 ifaddr 35 10K 10K 78643K 43 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 25 0 0 iov 0 0K 16K 78643K 8 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1211 76K 76K 78643K 1310 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 12 0K 0K 78643K 24 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12537 0 0 file desc 5 13K 25K 78643K 266 0 0 sigio 0 0K 0K 78643K 4 0 0 proc 41 30K 54K 78643K 302 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 ip_moptions 0 0K 0K 78643K 4 0 0 in_multi 33 2K 2K 78643K 33 0 0 ether_multi 1 0K 0K 78643K 1 0 0 mrt 1 0K 0K 78643K 23 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 48 212K 212K 78643K 48 0 0 exec 0 0K 1K 78643K 188 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 82 20K 20K 78643K 1400 0 0 UVM aobj 8 2K 2K 78643K 8 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 5 0K 0K 78643K 11 0 0 temp 93 2707K 2771K 78643K 3606 0 0 kqueue 0 0K 0K 78643K 3 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 inpcbpl 280 118 0 109 1 0 1 1 0 8 0 rtentry 112 48 0 2 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 45 0 45 1 1 0 1 0 8 0 tcpcb 544 14 0 10 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 ppxss 1128 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 189 0 0 12 0 12 12 0 8 0 art_table 32 190 0 0 2 0 2 2 0 8 0 art_node 16 47 0 6 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semapl 112 22 0 12 1 0 1 1 0 8 0 shmpl 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 1716 0 301 46 0 46 46 0 8 0 ffsino 240 1716 0 301 84 0 84 84 0 8 0 nchpl 144 2215 0 583 61 0 61 61 0 8 0 uvmvnodes 72 1824 0 0 34 0 34 34 0 8 0 vnodes 200 1824 0 0 96 0 96 96 0 8 0 namei 1024 5449 0 5449 2 1 1 1 0 8 1 scxspl 192 5723 0 5723 8 7 1 6 0 8 1 plimitpl 152 21 0 14 1 0 1 1 0 8 0 sigapl 432 437 0 424 2 0 2 2 0 8 0 futexpl 56 2503 0 2503 1 0 1 1 0 8 1 knotepl 112 79 0 60 1 0 1 1 0 8 0 kqueuepl 104 24 0 22 1 0 1 1 0 8 0 pipepl 112 210 0 191 2 1 1 1 0 8 0 fdescpl 424 438 0 424 2 0 2 2 0 8 0 filepl 120 1811 0 1715 4 0 4 4 0 8 1 lockfpl 104 25 0 25 2 1 1 1 0 8 1 lockfspl 48 11 0 11 2 1 1 1 0 8 1 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 21 0 11 1 0 1 1 0 8 0 ucredpl 96 203 0 196 1 0 1 1 0 8 0 zombiepl 144 425 0 423 2 1 1 1 0 8 0 processpl 840 452 0 423 4 0 4 4 0 8 0 procpl 624 731 0 696 4 0 4 4 0 8 1 sockpl 384 223 0 204 3 0 3 3 0 8 1 mcl64k 65536 2 0 2 1 1 0 1 0 8 0 mcl12k 12288 5 0 5 1 1 0 1 0 8 0 mcl9k 9216 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 4 0 4 1 1 0 1 0 8 0 mcl4k 4096 13 0 13 2 2 0 1 0 8 0 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 49876 0 49826 18 11 7 16 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 79616 0 79500 14 6 8 11 0 8 0 bufpl 256 6273 0 1485 300 0 300 300 0 8 0 anonpl 16 52799 0 42324 61 2 59 59 0 62 16 amapchunkpl 152 1947 0 1845 7 1 6 7 0 158 1 amappl16 192 2003 0 1428 41 4 37 41 0 8 8 amappl14 176 162 0 157 2 1 1 1 0 8 0 amappl13 168 111 0 110 1 0 1 1 0 8 0 amappl12 160 3 0 3 1 1 0 1 0 8 0 amappl11 152 49 0 34 1 0 1 1 0 8 0 amappl10 144 61 0 61 2 2 0 1 0 8 0 amappl9 136 503 0 499 1 0 1 1 0 8 0 amappl8 128 135 0 122 1 0 1 1 0 8 0 amappl7 120 30 0 27 1 0 1 1 0 8 0 amappl6 112 57 0 49 1 0 1 1 0 8 0 amappl5 104 238 0 228 1 0 1 1 0 8 0 amappl4 96 664 0 644 1 0 1 1 0 8 0 amappl3 88 295 0 284 1 0 1 1 0 8 0 amappl2 80 2721 0 2655 4 2 2 3 0 8 0 amappl1 72 16763 0 16358 26 17 9 19 0 8 0 amappl 80 961 0 926 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 438 0 424 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 438 0 424 1 0 1 1 0 8 0 vmmpekpl 168 7010 0 6984 2 0 2 2 0 8 0 vmmpepl 168 57234 0 55653 107 22 85 89 0 357 11 vmsppl 272 437 0 424 2 1 1 2 0 8 0 pdppl 4096 882 0 848 6 1 5 6 0 8 0 pvpl 32 164635 0 151181 152 5 147 147 0 265 37 pmappl 200 437 0 424 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 453 0 26 13 0 13 13 0 8 0