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(b21e54aa3be78866,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:500 rtable_walk_helper(fffffd8036daea60,ffff800016bfc458) at rtable_walk_helper+0x58 sys/net/rtable.c:682 art_table_walk(ffff800000075780,fffffd8036dad360,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075780,fffffd8036dad360,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075780,fffffd8036dad340,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad320,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad2e0,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad2c0,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad2a0,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad280,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad240,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad1a0,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad160,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad100,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad0a0,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad040,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad000,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad020,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad060,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad080,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad0c0,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad0e0,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad120,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad140,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad180,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad1c0,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad1e0,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad200,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad220,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad260,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad300,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad3a0,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad3c0,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dad400,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075780,fffffd8036dadf40,ffffffff8121f460,ffff800016bfc458) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075780,ffffffff8121f460,ffff800016bfc458) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,ffffffff81b60fa0,0) at rtable_walk+0xc7 sys/net/rtable.c:706 ip6_mrouter_done(fffffd8036fdca80) at ip6_mrouter_done+0xb8 sys/netinet6/ip6_mroute.c:529 rip6_detach(fffffd8036fdca80) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd8036fdca80,0) at soclose+0xb2 sys/kern/uipc_socket.c:292 soo_close(fffffd802fe6be20,ffff8000149014e8) at soo_close+0x40 fdrop(fffffd802fe6be20,ffff8000149014e8) at fdrop+0xc9 sys/kern/kern_descrip.c:1260 closef(fffffd802fe6be20,ffff8000149014e8) at closef+0x118 sys/kern/kern_descrip.c:1244 fdfree(ffff8000149014e8) at fdfree+0xf7 sys/kern/kern_descrip.c:1176 exit1(ffff8000149014e8,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000149014e8,ffff800016bfc8d0,ffff800016bfc940) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800016bfc9a0) at syscall+0x508 Xsyscall(6,1,0,1,0,7f7fffff3c34) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff3c00, count: -47 ddb> show registers rdi 0xb21e54aa3be78866 rsi 0 rbp 0xffff800016bfb190 rbx 0xffff800000075788 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0xa5cbfe9108341c52 r12 0 r13 0xfffffd8036dad360 r14 0 r15 0xb21e54aa3be78866 rip 0xffffffff81b60fcb mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800016bfb150 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.1) pid=430757 stat=onproc flags process=1008 proc=2000 pri=50, usrpri=61, nice=20 forw=0xffffffffffffffff, list=0xffff8000149025f8,0xffffffff822940e8 process=0xffff8000ffffaa00 user=0xffff800016bf7000, vmspace=0xfffffd803f00b880 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 17689 509849 5283 0 2 0x2 syz-executor.0 23829 493150 5283 0 3 0x82 nanosleep syz-executor.1 5283 195451 47750 0 3 0x82 thrsleep syz-fuzzer 5283 86372 47750 0 3 0x4000082 nanosleep syz-fuzzer 5283 457081 47750 0 3 0x4000082 kqread syz-fuzzer 5283 381863 47750 0 3 0x4000082 thrsleep syz-fuzzer 5283 280419 47750 0 3 0x4000082 thrsleep syz-fuzzer 5283 437879 47750 0 3 0x4000082 thrsleep syz-fuzzer 5283 261954 47750 0 3 0x4000082 thrsleep syz-fuzzer 47750 117259 9363 0 3 0x10008a pause ksh 9363 2097 58623 0 3 0x92 select sshd 57602 168227 1 0 3 0x100083 ttyin getty 58623 494648 1 0 3 0x80 select sshd 87283 254074 20119 73 3 0x100090 kqread syslogd 20119 144026 1 0 3 0x100082 netio syslogd 83952 78183 1 77 3 0x100090 poll dhclient 29986 128132 1 0 3 0x80 poll dhclient 26131 503107 0 0 2 0x14200 zerothread 3358 280067 0 0 3 0x14200 aiodoned aiodoned 58756 299828 0 0 3 0x14200 syncer update 10312 433459 0 0 3 0x14200 cleaner cleaner 69873 512150 0 0 3 0x14200 reaper reaper 80868 319392 0 0 3 0x14200 pgdaemon pagedaemon 82232 263240 0 0 3 0x14200 bored crynlk 58859 161227 0 0 3 0x14200 bored crypto 86980 107083 0 0 3 0x40014200 acpi0 acpi0 20136 207579 0 0 3 0x14200 bored softnet 89161 38099 0 0 2 0x14200 systqmp 68685 141760 0 0 3 0x14200 bored systq 35685 227385 0 0 3 0x40014200 bored softclock 53413 172697 0 0 3 0x40014200 idle0 85799 281313 0 0 3 0x14200 bored smr 1 40205 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 9436 6311K 6698K 78643K 10578 0 0 pcb 24 9K 10K 78643K 171 0 0 rtable 106 3K 3K 78643K 223 0 0 ifaddr 34 9K 9K 78643K 34 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 17 0 0 iov 0 0K 12K 78643K 2 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1211 76K 76K 78643K 1224 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 3 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 2 0K 0K 78643K 2 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 5 13K 25K 78643K 160 0 0 proc 41 30K 54K 78643K 291 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 33 2K 2K 78643K 33 0 0 ether_multi 1 0K 0K 78643K 9 0 0 mrt 1 0K 0K 78643K 28 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 18 79K 79K 78643K 18 0 0 exec 0 0K 1K 78643K 182 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 75 20K 20K 78643K 1144 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 NDP 5 0K 0K 78643K 9 0 0 temp 82 2700K 2764K 78643K 3292 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 280 122 0 114 1 0 1 1 0 8 0 rtentry 112 46 0 2 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 58 0 58 1 0 1 1 0 8 1 tcpcb 544 12 0 8 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 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 45 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1567 0 149 46 0 46 46 0 8 0 ffsino 240 1567 0 149 84 0 84 84 0 8 0 nchpl 144 1937 0 316 61 0 61 61 0 8 0 uvmvnodes 72 1620 0 0 30 0 30 30 0 8 0 vnodes 200 1620 0 0 86 0 86 86 0 8 0 namei 1024 4581 0 4581 2 1 1 1 0 8 1 scxspl 192 4851 0 4851 8 2 6 7 0 8 6 plimitpl 152 14 0 7 1 0 1 1 0 8 0 sigapl 432 331 0 318 2 0 2 2 0 8 0 futexpl 56 960 0 960 1 0 1 1 0 8 1 knotepl 112 53 0 34 1 0 1 1 0 8 0 kqueuepl 104 2 0 0 1 0 1 1 0 8 0 pipepl 112 138 0 119 2 1 1 1 0 8 0 fdescpl 424 332 0 318 2 0 2 2 0 8 0 filepl 120 1244 0 1149 4 0 4 4 0 8 1 lockfpl 104 18 0 18 2 1 1 1 0 8 1 lockfspl 48 9 0 9 2 1 1 1 0 8 1 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 41 0 34 1 0 1 1 0 8 0 zombiepl 144 319 0 318 2 1 1 1 0 8 0 processpl 848 346 0 318 4 0 4 4 0 8 0 procpl 624 481 0 447 3 0 3 3 0 8 0 sockpl 384 199 0 181 3 0 3 3 0 8 1 mcl4k 4096 11 0 11 2 1 1 1 0 8 1 mcl2k 2048 51035 0 50993 14 2 12 12 0 8 6 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 80566 0 80423 12 3 9 9 0 8 0 bufpl 256 5722 0 1311 276 0 276 276 0 8 0 anonpl 16 36999 0 27309 41 1 40 40 0 62 0 amapchunkpl 152 1383 0 1298 6 0 6 6 0 158 2 amappl16 192 1082 0 554 27 0 27 27 0 8 0 amappl15 184 65 0 63 1 0 1 1 0 8 0 amappl14 176 100 0 97 2 1 1 1 0 8 0 amappl13 168 11 0 9 1 0 1 1 0 8 0 amappl12 160 12 0 9 1 0 1 1 0 8 0 amappl11 152 50 0 36 1 0 1 1 0 8 0 amappl10 144 62 0 61 2 1 1 1 0 8 0 amappl9 136 602 0 598 1 0 1 1 0 8 0 amappl8 128 181 0 168 1 0 1 1 0 8 0 amappl7 120 29 0 26 1 0 1 1 0 8 0 amappl6 112 54 0 48 1 0 1 1 0 8 0 amappl5 104 148 0 139 1 0 1 1 0 8 0 amappl4 96 460 0 437 1 0 1 1 0 8 0 amappl3 88 173 0 162 1 0 1 1 0 8 0 amappl2 80 1932 0 1865 4 1 3 3 0 8 1 amappl1 72 15094 0 14683 25 9 16 19 0 8 8 amappl 80 706 0 673 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 24 332 0 318 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 332 0 318 1 0 1 1 0 8 0 vmmpekpl 168 6083 0 6057 2 0 2 2 0 8 0 vmmpepl 168 45015 0 43475 93 8 85 85 0 357 18 vmsppl 272 331 0 318 2 0 2 2 0 8 1 pdppl 4096 671 0 636 6 0 6 6 0 8 1 pvpl 32 130408 0 117759 109 4 105 105 0 265 2 pmappl 200 331 0 318 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 420 0 9 12 0 12 12 0 8 0