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(1c4b1fd036c121a1,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd803703aae0,ffff8000149243a8) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd80370390e0,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd80370390e0,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd80370390c0,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370390a0,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039040,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039020,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039000,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039060,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039080,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039140,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039160,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370391a0,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039200,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039220,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039240,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039280,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370392e0,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039300,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370393c0,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039400,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039420,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039480,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370394a0,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370394c0,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370394e0,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039500,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039540,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039560,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039580,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd80370395e0,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039600,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039640,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8037039f60,ffffffff81045bb0,ffff8000149243a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff81045bb0,ffff8000149243a8) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81047de0,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd802ec35310) at ip6_mrouter_done+0xb5 rip6_detach(fffffd802ec35310) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd802ec35310,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd803622db48,ffff8000ffff5b38) at soo_close+0x40 fdrop(fffffd803622db48,ffff8000ffff5b38) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd803622db48,ffff8000ffff5b38) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff5b38) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff5b38,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff5b38,ffff800014924840,ffff800014924890) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800014924910) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(0,1,0,1,0,7f7ffffbcff4) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbcfc0, count: -47 ddb> show registers rdi 0x1c4b1fd036c121a1 rsi 0 rbp 0xffff8000149230e0 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x67fb9f3e3333cfff r12 0 r13 0xfffffd80370390e0 r14 0 r15 0x1c4b1fd036c121a1 rip 0xffffffff81047e0b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000149230a0 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.1) pid=138885 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2c70,0xffffffff8255c658 process=0xffff8000148a30f8 user=0xffff80001491f000, vmspace=0xfffffd803f013dd0 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 19851 149602 95296 0 2 0x2 syz-executor.0 99883 489475 95296 0 3 0x82 nanosleep syz-executor.1 54158 328286 0 0 3 0x14200 acct acct 8126 293489 1 0 3 0x100083 ttyin getty 7870 240497 0 0 3 0x14200 bored sosplice 95296 513782 20576 0 3 0x82 thrsleep syz-fuzzer 95296 377085 20576 0 3 0x4000082 thrsleep syz-fuzzer 95296 276549 20576 0 3 0x4000082 thrsleep syz-fuzzer 95296 228868 20576 0 3 0x4000082 thrsleep syz-fuzzer 95296 351261 20576 0 3 0x4000082 thrsleep syz-fuzzer 95296 479931 20576 0 3 0x4000082 kqread syz-fuzzer 95296 361803 20576 0 3 0x4000082 thrsleep syz-fuzzer 20576 421718 97524 0 3 0x10008a pause ksh 97524 210522 98971 0 3 0x92 select sshd 98971 390519 1 0 3 0x80 select sshd 15721 422084 3031 73 3 0x100090 kqread syslogd 3031 172492 1 0 3 0x100082 netio syslogd 75803 79760 1 77 3 0x100090 poll dhclient 94018 391109 1 0 3 0x80 poll dhclient 72957 252839 0 0 2 0x14200 zerothread 8171 351913 0 0 3 0x14200 aiodoned aiodoned 98572 229788 0 0 3 0x14200 syncer update 14362 159460 0 0 3 0x14200 cleaner cleaner 59409 308297 0 0 3 0x14200 reaper reaper 42045 163483 0 0 3 0x14200 pgdaemon pagedaemon 95377 238723 0 0 3 0x14200 bored crynlk 47372 278937 0 0 3 0x14200 bored crypto 11758 282165 0 0 3 0x40014200 acpi0 acpi0 63545 400484 0 0 3 0x14200 bored softnet 78937 186589 0 0 2 0x14200 systqmp 30672 383307 0 0 3 0x14200 bored systq 38698 182570 0 0 3 0x40014200 bored softclock 28658 79089 0 0 3 0x40014200 idle0 53973 214156 0 0 3 0x14200 bored smr 1 11399 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 9519 6353K 6832K 78643K 12110 0 0 pcb 15 8K 8K 78643K 191 0 0 rtable 114 4K 4K 78643K 773 0 0 ifaddr 61 14K 16K 78643K 272 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 119 0 0 iov 0 0K 16K 78643K 180 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1210 76K 77K 78643K 2055 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 28 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 12 1K 1K 78643K 215 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 1817 0 0 sigio 0 0K 0K 78643K 26 0 0 proc 49 38K 55K 78643K 747 0 0 subproc 32 2K 2K 78643K 119 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 169 0 0 in_multi 33 2K 2K 78643K 134 0 0 ether_multi 2 0K 0K 78643K 9 0 0 mrt 2 0K 0K 78643K 9 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 84 371K 371K 78643K 84 0 0 exec 0 0K 1K 78643K 449 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 92 21K 29K 78643K 5179 0 0 UVM aobj 105 3K 3K 78643K 122 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 165 0 0 NDP 13 0K 0K 78643K 81 0 0 temp 177 3539K 3609K 78643K 23083 0 0 kqueue 0 0K 0K 78643K 12 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 17 0 11 1 0 1 1 0 8 0 rtpcb 80 121 0 119 1 0 1 1 0 8 0 rtentry 112 99 0 55 2 0 2 2 0 8 0 unpcb 120 611 0 603 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 3282 0 3282 2 2 0 1 0 8 0 tcpcb 544 339 0 335 1 0 1 1 0 8 0 ipq 40 6 0 6 2 2 0 1 0 8 0 ipqe 40 16 0 16 2 2 0 1 0 8 0 inpcb 280 993 0 984 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 14 0 10 1 0 1 1 0 8 0 pkpcb 40 10 0 10 3 3 0 1 0 8 0 ppxss 1128 34 0 34 6 5 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 437 0 219 14 0 14 14 0 8 0 art_table 32 438 0 219 2 0 2 2 0 8 0 art_node 16 96 0 55 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 11 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 213 0 203 1 0 1 1 0 8 0 shmpl 112 120 0 17 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 4183 0 2792 46 0 46 46 0 8 0 ffsino 240 4183 0 2792 83 0 83 83 0 8 0 nchpl 144 6933 0 5335 60 0 60 60 0 8 0 uvmvnodes 72 4592 0 0 84 0 84 84 0 8 0 vnodes 208 4592 0 0 242 0 242 242 0 8 0 namei 1024 21755 0 21755 2 1 1 1 0 8 1 scsiplug 64 2 0 2 1 1 0 1 0 8 0 scxspl 192 21470 0 21470 14 13 1 7 0 8 1 plimitpl 152 151 0 144 1 0 1 1 0 8 0 sigapl 432 1974 0 1961 2 0 2 2 0 8 0 futexpl 56 30414 0 30414 1 0 1 1 0 8 1 knotepl 112 439 0 420 1 0 1 1 0 8 0 kqueuepl 104 437 0 435 1 0 1 1 0 8 0 pipepl 112 1186 0 1167 2 1 1 2 0 8 0 fdescpl 424 1975 0 1961 2 0 2 2 0 8 0 filepl 120 11717 0 11620 5 1 4 5 0 8 1 lockfpl 104 629 0 628 1 0 1 1 0 8 0 lockfspl 48 201 0 200 1 0 1 1 0 8 0 sessionpl 112 23 0 13 1 0 1 1 0 8 0 pgrppl 48 55 0 45 1 0 1 1 0 8 0 ucredpl 96 2003 0 1996 1 0 1 1 0 8 0 zombiepl 144 1962 0 1961 2 1 1 1 0 8 0 processpl 864 1991 0 1961 4 0 4 4 0 8 0 procpl 632 4232 0 4196 4 0 4 4 0 8 0 sosppl 128 23 0 23 6 5 1 1 0 8 1 sockpl 384 1759 0 1740 3 0 3 3 0 8 0 mcl64k 65536 47 0 47 4 3 1 1 0 8 1 mcl16k 16384 10 0 10 5 4 1 1 0 8 1 mcl12k 12288 35 0 35 7 6 1 1 0 8 1 mcl9k 9216 26 0 26 7 6 1 1 0 8 1 mcl8k 8192 34 0 34 8 7 1 1 0 8 1 mcl4k 4096 112 0 112 2 1 1 1 0 8 1 mcl2k2 2112 11 0 11 7 6 1 1 0 8 1 mcl2k 2048 60422 0 60380 19 13 6 13 0 8 0 mtagpl 80 18 0 18 2 2 0 1 0 8 0 mbufpl 256 106624 0 106539 15 7 8 10 0 8 0 bufpl 256 10563 0 5635 309 0 309 309 0 8 0 anonpl 16 198397 0 187463 102 43 59 68 0 62 4 amapchunkpl 152 8710 0 8606 20 14 6 10 0 158 1 amappl16 192 10369 0 9661 89 44 45 48 0 8 8 amappl15 184 530 0 530 1 1 0 1 0 8 0 amappl14 176 69 0 64 1 0 1 1 0 8 0 amappl13 168 10 0 9 1 0 1 1 0 8 0 amappl12 160 5 0 3 1 0 1 1 0 8 0 amappl11 152 962 0 949 1 0 1 1 0 8 0 amappl10 144 7 0 7 2 2 0 1 0 8 0 amappl9 136 1195 0 1187 1 0 1 1 0 8 0 amappl8 128 751 0 720 2 0 2 2 0 8 0 amappl7 120 54 0 50 1 0 1 1 0 8 0 amappl6 112 951 0 944 1 0 1 1 0 8 0 amappl5 104 188 0 178 1 0 1 1 0 8 0 amappl4 96 2208 0 2177 1 0 1 1 0 8 0 amappl3 88 174 0 169 1 0 1 1 0 8 0 amappl2 80 14930 0 14862 3 1 2 3 0 8 0 amappl1 72 44180 0 43767 26 16 10 20 0 8 0 amappl 80 4539 0 4504 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 64 121 0 17 2 0 2 2 0 8 0 uaddrrnd 24 1975 0 1961 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1975 0 1961 1 0 1 1 0 8 0 vmmpekpl 168 16546 0 16522 2 0 2 2 0 8 0 vmmpepl 168 236763 0 235001 192 89 103 103 0 357 22 vmsppl 272 1974 0 1961 2 1 1 2 0 8 0 pdppl 4096 3956 0 3922 6 1 5 6 0 8 0 pvpl 32 538552 0 524607 222 80 142 164 0 265 11 pmappl 200 1974 0 1961 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 476 0 40 13 0 13 13 0 8 0