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(86ac19d006e0cd6e,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d72ba0,ffff800015121bc8) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d71320,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d71320,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d71300,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d712e0,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71280,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71240,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71220,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71200,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d711e0,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71140,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71120,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d710e0,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d710c0,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71080,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71060,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71020,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71000,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71040,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d710a0,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71100,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71160,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71180,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d711a0,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d711c0,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71260,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d712a0,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d712c0,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d713e0,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71400,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71440,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71460,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d714a0,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d71f00,ffffffff81e4f840,ffff800015121bc8) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff81e4f840,ffff800015121bc8) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81e5e830,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd8039823780) at ip6_mrouter_done+0xb5 rip6_detach(fffffd8039823780) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd8039823780,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd802ec942e0,ffff8000ffff3650) at soo_close+0x40 fdrop(fffffd802ec942e0,ffff8000ffff3650) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802ec942e0,ffff8000ffff3650) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff3650) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff3650,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff3650,ffff800015122060,ffff8000151220b0) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800015122130) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffe2244) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe2210, count: -47 ddb> show registers rdi 0x86ac19d006e0cd6e rsi 0 rbp 0xffff800015120900 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0xbe4b328cf8e1b34d r12 0 r13 0xfffffd8036d71320 r14 0 r15 0x86ac19d006e0cd6e rip 0xffffffff81e5e85b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000151208c0 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=366866 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2018,0xffffffff82588698 process=0xffff8000ffff7450 user=0xffff80001511d000, vmspace=0xfffffd803f014000 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 6091 234264 71150 0 2 0 syz-executor.1 6091 482878 71150 0 3 0x4000080 ttyin syz-executor.1 7415 509737 24383 0 3 0x82 nanosleep syz-executor.0 26436 382491 1 0 3 0x100083 ttyin getty 27953 180652 0 0 3 0x14200 bored sosplice 71150 251820 24383 0 3 0x82 nanosleep syz-executor.1 24383 49194 51073 0 3 0x82 thrsleep syz-fuzzer 24383 408533 51073 0 3 0x4000082 thrsleep syz-fuzzer 24383 94823 51073 0 3 0x4000082 kqread syz-fuzzer 24383 178025 51073 0 3 0x4000082 thrsleep syz-fuzzer 24383 315134 51073 0 3 0x4000082 thrsleep syz-fuzzer 24383 86556 51073 0 3 0x4000082 thrsleep syz-fuzzer 24383 164974 51073 0 3 0x4000082 thrsleep syz-fuzzer 51073 75241 9604 0 3 0x10008a pause ksh 9604 335418 25624 0 3 0x92 select sshd 25624 19153 1 0 3 0x80 select sshd 27496 445522 25482 73 3 0x100090 kqread syslogd 25482 16854 1 0 3 0x100082 netio syslogd 53353 95780 1 77 3 0x100090 poll dhclient 70315 318872 1 0 3 0x80 poll dhclient 65207 272477 0 0 2 0x14200 zerothread 82865 48156 0 0 3 0x14200 aiodoned aiodoned 80773 337985 0 0 3 0x14200 syncer update 37880 520445 0 0 3 0x14200 cleaner cleaner 78079 425655 0 0 3 0x14200 reaper reaper 51968 35055 0 0 3 0x14200 pgdaemon pagedaemon 17582 313434 0 0 3 0x14200 bored crynlk 44474 237261 0 0 3 0x14200 bored crypto 38288 155476 0 0 3 0x40014200 acpi0 acpi0 22761 162946 0 0 3 0x14200 bored softnet 85188 204333 0 0 2 0x14200 systqmp 19596 370153 0 0 3 0x14200 bored systq 3976 277919 0 0 3 0x40014200 bored softclock 67570 350571 0 0 3 0x40014200 idle0 7736 152114 0 0 3 0x14200 bored smr 1 99977 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 9509 6350K 14670K 78643K 13093 0 0 pcb 15 8K 8K 78643K 103 0 0 rtable 112 4K 4K 78643K 390 0 0 ifaddr 59 13K 15K 78643K 135 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 68 0 0 iov 0 0K 16K 78643K 76 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1218 77K 77K 78643K 2014 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 15 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 12 0K 1K 78643K 84 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 6 17K 25K 78643K 864 0 0 sigio 0 0K 0K 78643K 4 0 0 proc 49 38K 63K 78643K 495 0 0 subproc 32 2K 2K 78643K 51 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 92 0 0 in_multi 33 2K 2K 78643K 76 0 0 ether_multi 2 0K 0K 78643K 4 0 0 mrt 2 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 78 344K 344K 78643K 78 0 0 exec 0 0K 1K 78643K 254 0 0 pfkey data 0 0K 0K 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 99 21K 21K 78643K 2831 0 0 UVM aobj 54 3K 3K 78643K 60 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 119 0 0 NDP 12 0K 0K 78643K 38 0 0 temp 170 3535K 3610K 78643K 11676 0 0 kqueue 0 0K 0K 78643K 6 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 9 0 3 1 0 1 1 0 8 0 rtpcb 80 55 0 53 1 0 1 1 0 8 0 rtentry 112 57 0 13 2 0 2 2 0 8 0 unpcb 120 281 0 273 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 6457 0 6457 1 1 0 1 0 8 0 tcpcb 544 180 0 176 1 0 1 1 0 8 0 inpcb 280 504 0 495 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 6 0 2 1 0 1 1 0 8 0 pkpcb 40 12 0 12 3 2 1 1 0 8 1 ppxss 1128 13 0 13 4 3 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 259 0 44 14 0 14 14 0 8 0 art_table 32 260 0 44 2 0 2 2 0 8 0 art_node 16 56 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 78 0 68 1 0 1 1 0 8 0 shmpl 112 58 0 6 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2699 0 1310 46 0 46 46 0 8 0 ffsino 240 2699 0 1310 83 0 83 83 0 8 0 nchpl 144 4074 0 2473 61 1 60 61 0 8 0 uvmvnodes 72 3327 0 0 61 0 61 61 0 8 0 vnodes 208 3327 0 0 176 0 176 176 0 8 0 namei 1024 11867 0 11867 2 1 1 1 0 8 1 scxspl 192 11631 0 11631 12 11 1 7 0 8 1 plimitpl 152 95 0 88 1 0 1 1 0 8 0 sigapl 432 1033 0 1019 2 0 2 2 0 8 0 futexpl 56 14335 0 14335 1 0 1 1 0 8 1 knotepl 112 220 0 201 1 0 1 1 0 8 0 kqueuepl 104 177 0 175 1 0 1 1 0 8 0 pipepl 112 502 0 483 1 0 1 1 0 8 0 fdescpl 424 1034 0 1019 2 0 2 2 0 8 0 filepl 120 5904 0 5806 4 0 4 4 0 8 0 lockfpl 104 257 0 256 1 0 1 1 0 8 0 lockfspl 48 83 0 82 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 31 0 21 1 0 1 1 0 8 0 ucredpl 96 1004 0 997 1 0 1 1 0 8 0 zombiepl 144 1020 0 1019 2 1 1 1 0 8 0 processpl 864 1049 0 1019 4 0 4 4 0 8 0 procpl 632 2096 0 2059 4 0 4 4 0 8 0 sosppl 128 9 0 9 4 4 0 1 0 8 0 sockpl 384 866 0 847 3 0 3 3 0 8 1 mcl64k 65536 23 0 23 2 2 0 1 0 8 0 mcl16k 16384 3 0 3 2 2 0 1 0 8 0 mcl12k 12288 20 0 20 4 3 1 1 0 8 1 mcl9k 9216 8 0 8 4 4 0 1 0 8 0 mcl8k 8192 12 0 12 3 2 1 1 0 8 1 mcl4k 4096 48 0 48 2 1 1 1 0 8 1 mcl2k2 2112 2 0 2 2 1 1 1 0 8 1 mcl2k 2048 49085 0 49041 26 19 7 19 0 8 1 mtagpl 80 23 0 15 2 1 1 1 0 8 0 mbufpl 256 84549 0 84451 17 7 10 12 0 8 0 bufpl 256 10003 0 4198 364 0 364 364 0 8 0 anonpl 16 97182 0 86584 84 25 59 69 0 62 7 amapchunkpl 152 4026 0 3917 10 4 6 6 0 158 0 amappl16 192 5143 0 4426 63 26 37 48 0 8 1 amappl14 176 464 0 459 1 0 1 1 0 8 0 amappl13 168 2 0 2 2 2 0 1 0 8 0 amappl12 160 11 0 9 1 0 1 1 0 8 0 amappl11 152 434 0 421 1 0 1 1 0 8 0 amappl10 144 12 0 9 1 0 1 1 0 8 0 amappl9 136 582 0 576 1 0 1 1 0 8 0 amappl8 128 153 0 129 1 0 1 1 0 8 0 amappl7 120 41 0 36 1 0 1 1 0 8 0 amappl6 112 457 0 446 1 0 1 1 0 8 0 amappl5 104 159 0 149 1 0 1 1 0 8 0 amappl4 96 826 0 797 1 0 1 1 0 8 0 amappl3 88 999 0 989 1 0 1 1 0 8 0 amappl2 80 7427 0 7353 3 1 2 3 0 8 0 amappl1 72 27475 0 27049 27 18 9 20 0 8 0 amappl 80 2331 0 2293 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 59 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1034 0 1019 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1034 0 1019 1 0 1 1 0 8 0 vmmpekpl 168 9673 0 9650 2 0 2 2 0 8 0 vmmpepl 168 126771 0 124902 150 49 101 102 0 357 19 vmsppl 272 1033 0 1019 2 1 1 2 0 8 0 pdppl 4096 2074 0 2038 6 1 5 6 0 8 0 pvpl 32 286225 0 272589 205 48 157 167 0 265 28 pmappl 200 1033 0 1019 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 530 0 38 15 0 15 15 0 8 0