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(e51bba7ddc35beb7,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d6bb70,ffff8000189689a8) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d6a2c0,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d6a2c0,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d6a2a0,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a280,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a260,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a240,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a200,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a1c0,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a1a0,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a160,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a140,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a120,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a080,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a040,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a020,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a000,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a060,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a0a0,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a0c0,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a0e0,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a100,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a180,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a1e0,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a220,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a2e0,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a300,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a340,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a400,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a440,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a480,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a4a0,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6a4c0,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6af40,ffffffff814b1de0,ffff8000189689a8) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff814b1de0,ffff8000189689a8) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81fe6690,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd802abd5638) at ip6_mrouter_done+0xb5 rip6_detach(fffffd802abd5638) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd802abd5638,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd803bee99e0,ffff8000ffff3b40) at soo_close+0x40 fdrop(fffffd803bee99e0,ffff8000ffff3b40) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd803bee99e0,ffff8000ffff3b40) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff3b40) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff3b40,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff3b40,ffff800018968e40,ffff800018968e90) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800018968f10) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffe0964) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe0930, count: -47 ddb> show registers rdi 0xe51bba7ddc35beb7 rsi 0 rbp 0xffff8000189676e0 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0xa4a80013841631e9 r12 0 r13 0xfffffd8036d6a2c0 r14 0 r15 0xe51bba7ddc35beb7 rip 0xffffffff81fe66bb mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000189676a0 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=203269 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff38c8,0xffffffff8256d418 process=0xffff8000148a2d98 user=0xffff800018963000, vmspace=0xfffffd803f013bb0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 48101 472651 9073 0 2 0 syz-executor.1 48101 408375 9073 0 3 0x4000080 ttyout syz-executor.1 39257 292433 82805 0 3 0x82 nanosleep syz-executor.0 9073 65034 82805 0 3 0x82 nanosleep syz-executor.1 54007 345108 1 0 3 0x100083 ttyin getty 12209 101764 0 0 3 0x14200 bored sosplice 82805 353918 46237 0 3 0x82 thrsleep syz-fuzzer 82805 77898 46237 0 3 0x4000082 thrsleep syz-fuzzer 82805 223112 46237 0 3 0x4000082 kqread syz-fuzzer 82805 116759 46237 0 3 0x4000082 thrsleep syz-fuzzer 82805 192393 46237 0 3 0x4000082 thrsleep syz-fuzzer 82805 170153 46237 0 3 0x4000082 thrsleep syz-fuzzer 82805 263440 46237 0 3 0x4000082 thrsleep syz-fuzzer 46237 114661 77600 0 3 0x10008a pause ksh 77600 339115 65046 0 3 0x92 select sshd 65046 473941 1 0 3 0x80 select sshd 57619 494896 3878 73 3 0x100090 kqread syslogd 3878 139863 1 0 3 0x100082 netio syslogd 81129 257682 1 77 3 0x100090 poll dhclient 89961 187588 1 0 3 0x80 poll dhclient 33273 56859 0 0 2 0x14200 zerothread 31852 17648 0 0 3 0x14200 aiodoned aiodoned 78123 479807 0 0 3 0x14200 syncer update 73969 509873 0 0 3 0x14200 cleaner cleaner 71790 387663 0 0 3 0x14200 reaper reaper 18456 272745 0 0 3 0x14200 pgdaemon pagedaemon 15997 29423 0 0 3 0x14200 bored crynlk 90958 398516 0 0 3 0x14200 bored crypto 80878 68364 0 0 3 0x40014200 acpi0 acpi0 55143 270386 0 0 3 0x14200 bored softnet 8862 398280 0 0 2 0x14200 systqmp 79250 312782 0 0 3 0x14200 bored systq 80065 27468 0 0 3 0x40014200 bored softclock 73705 31042 0 0 3 0x40014200 idle0 35380 496942 0 0 3 0x14200 bored smr 1 454413 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 9587 6515K 7737K 78643K 38234 0 0 pcb 16 8K 9K 78643K 1191 0 0 rtable 118 4K 4K 78643K 3213 0 0 ifaddr 77 22K 25K 78643K 1094 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 316 0 0 iov 0 0K 32K 78643K 917 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1205 76K 77K 78643K 13422 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 153 0 0 VM map 2 0K 0K 78643K 12 0 0 sem 12 0K 0K 78643K 2359 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 6 17K 25K 78643K 11456 0 0 sigio 1 0K 0K 78643K 82 0 0 proc 50 38K 62K 78643K 2595 0 0 subproc 32 2K 2K 78643K 663 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 933 0 0 in_multi 33 2K 2K 78643K 766 0 0 ether_multi 2 0K 0K 78643K 59 0 0 mrt 2 0K 0K 78643K 18 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 144 636K 636K 78643K 144 0 0 exec 0 0K 1K 78643K 1429 0 0 pfkey data 0 0K 4K 78643K 4 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 132 23K 32K 78643K 27199 0 0 UVM aobj 130 4K 4K 78643K 146 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 1091 0 0 NDP 18 0K 0K 78643K 345 0 0 temp 212 3540K 4180K 78643K 177542 0 0 kqueue 0 0K 0K 78643K 72 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 84 0 78 1 0 1 1 0 8 0 rtpcb 80 456 0 454 1 0 1 1 0 8 0 rtentry 112 419 0 373 2 0 2 2 0 8 0 unpcb 120 3321 0 3309 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 3 0 3 3 3 0 1 0 8 0 tcpqe 32 5047 0 5047 1 1 0 1 0 8 0 tcpcb 544 1850 0 1846 1 0 1 1 0 8 0 ipq 40 20 0 20 10 10 0 1 0 8 0 ipqe 40 42 0 42 10 10 0 1 0 8 0 inpcb 280 6408 0 6398 25 23 2 3 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 74 0 70 1 0 1 1 0 8 0 pkpcb 40 30 0 30 10 10 0 1 0 8 0 swfcl 56 4 0 0 1 0 1 1 0 8 0 ppxss 1128 173 0 173 30 29 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1842 0 1597 24 8 16 16 0 8 0 art_table 32 1843 0 1597 2 0 2 2 0 8 0 art_node 16 409 0 367 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 5 1 0 1 1 0 8 0 semapl 112 2357 0 2347 1 0 1 1 0 8 0 shmpl 112 144 0 16 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 20082 0 18674 46 0 46 46 0 8 0 ffsino 240 20082 0 18674 84 0 84 84 0 8 0 nchpl 144 38034 0 36413 61 0 61 61 0 8 0 uvmvnodes 72 7590 0 0 138 0 138 138 0 8 0 vnodes 208 7590 0 0 400 0 400 400 0 8 0 namei 1024 139068 0 139068 6 5 1 1 0 8 1 vmpool 520 10 0 10 5 5 0 1 0 8 0 scsiplug 64 9 0 9 7 6 1 1 0 8 1 scxspl 192 98912 0 98912 29 28 1 7 0 8 1 plimitpl 152 793 0 786 1 0 1 1 0 8 0 sigapl 432 11518 0 11504 2 0 2 2 0 8 0 futexpl 56 237972 0 237972 4 3 1 1 0 8 1 knotepl 112 2139 0 2120 1 0 1 1 0 8 0 kqueuepl 104 2124 0 2122 1 0 1 1 0 8 0 pipepl 112 4502 0 4483 8 7 1 2 0 8 0 fdescpl 424 11519 0 11504 2 0 2 2 0 8 0 filepl 120 90096 0 89996 22 18 4 6 0 8 0 lockfpl 104 25332 0 25331 1 0 1 1 0 8 0 lockfspl 48 7310 0 7309 1 0 1 1 0 8 0 sessionpl 112 56 0 46 1 0 1 1 0 8 0 pgrppl 48 108 0 98 1 0 1 1 0 8 0 ucredpl 96 35966 0 35957 1 0 1 1 0 8 0 zombiepl 144 11506 0 11505 4 3 1 1 0 8 0 processpl 864 11535 0 11505 4 0 4 4 0 8 0 procpl 632 24626 0 24589 4 0 4 4 0 8 0 sosppl 128 117 0 117 28 27 1 1 0 8 1 sockpl 384 10456 0 10432 24 21 3 5 0 8 0 mcl64k 65536 2313 0 2313 242 241 1 64 0 8 1 mcl16k 16384 27 0 27 20 20 0 1 0 8 0 mcl12k 12288 174 0 174 20 20 0 1 0 8 0 mcl9k 9216 83 0 83 28 27 1 1 0 8 1 mcl8k 8192 187 0 187 20 19 1 1 0 8 1 mcl4k 4096 823 0 823 9 8 1 1 0 8 1 mcl2k2 2112 84 0 84 29 28 1 1 0 8 1 mcl2k 2048 73055 0 73010 28 21 7 13 0 8 0 mtagpl 80 1436 0 1327 20 17 3 5 0 8 0 mbufpl 256 181770 0 181459 179 159 20 44 0 8 0 bufpl 256 33705 0 26114 476 1 475 475 0 8 0 anonpl 16 1030240 0 1016976 282 212 70 73 0 62 11 amapchunkpl 152 50153 0 50043 125 117 8 29 0 158 2 amappl16 192 59410 0 58651 318 271 47 51 0 8 8 amappl15 184 1025 0 1025 7 7 0 1 0 8 0 amappl14 176 1668 0 1660 2 1 1 1 0 8 0 amappl13 168 1096 0 1095 8 7 1 1 0 8 0 amappl12 160 3836 0 3835 1 0 1 1 0 8 0 amappl11 152 1134 0 1123 1 0 1 1 0 8 0 amappl10 144 741 0 741 4 4 0 1 0 8 0 amappl9 136 2289 0 2281 1 0 1 1 0 8 0 amappl8 128 1845 0 1795 3 1 2 2 0 8 0 amappl7 120 915 0 909 1 0 1 1 0 8 0 amappl6 112 1097 0 1085 1 0 1 1 0 8 0 amappl5 104 4281 0 4270 1 0 1 1 0 8 0 amappl4 96 8874 0 8842 1 0 1 1 0 8 0 amappl3 88 5109 0 5098 1 0 1 1 0 8 0 amappl2 80 89880 0 89805 4 2 2 3 0 8 0 amappl1 72 216900 0 216471 26 16 10 20 0 8 0 amappl 80 25498 0 25460 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 64 145 0 16 3 0 3 3 0 8 0 uaddrrnd 24 11529 0 11504 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11529 0 11504 1 0 1 1 0 8 0 vmmpekpl 168 62352 0 62325 2 0 2 2 0 8 0 vmmpepl 168 1337068 0 1335118 429 334 95 113 0 357 5 vmsppl 272 11518 0 11504 3 2 1 2 0 8 0 pdppl 4096 23064 0 23028 6 1 5 6 0 8 0 pvpl 32 2627242 0 2610771 578 408 170 279 0 265 32 pmappl 200 11528 0 11514 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 1104 0 487 21 2 19 19 0 8 0