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(7cfff31507fbac6b,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d67a70,ffff800015950078) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8027ed4f70,ffffffff81c07910,ffff800015950078) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8027ed4f70,ffffffff81c07910,ffff800015950078) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d668c0,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66ae0,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d668e0,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66960,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66b00,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66b40,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66c00,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66c20,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66c60,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66c80,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66ca0,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66cc0,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66ce0,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66d00,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66d20,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66d60,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66e40,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66ea0,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66f00,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d669c0,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66ac0,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66a40,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66aa0,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd802f049f48,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd802f049f28,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd802f049f08,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd802f049ec8,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd802f049ea8,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd802f049e48,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66f40,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d66f60,ffffffff81c07910,ffff800015950078) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff81c07910,ffff800015950078) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81f40050,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd80363e8a88) at ip6_mrouter_done+0xb5 rip6_detach(fffffd80363e8a88) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd80363e8a88,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd802ec3d448,ffff8000ffff2508) at soo_close+0x40 fdrop(fffffd802ec3d448,ffff8000ffff2508) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802ec3d448,ffff8000ffff2508) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff2508) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff2508,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff2508,ffff800015950510,ffff800015950560) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff8000159505e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(0,1,0,1,0,7f7ffffdaf24) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdaef0, count: -47 ddb> show registers rdi 0x7cfff31507fbac6b rsi 0 rbp 0xffff80001594edb0 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0xc6a155f069ebe98e r12 0 r13 0xfffffd8027ed4f70 r14 0 r15 0x7cfff31507fbac6b rip 0xffffffff81f4007b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001594ed70 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=486154 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2c70,0xffff8000ffff33e8 process=0xffff8000148a2a38 user=0xffff80001594b000, vmspace=0xfffffd803f013550 estcpu=33, cpticks=6, pctcpu=0.4 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 58135 137733 98943 0 2 0 syz-executor.1 58135 54705 98943 0 3 0x4000080 fsleep syz-executor.1 56327 119827 40078 0 3 0x82 nanosleep syz-executor.0 98943 314330 40078 0 3 0x82 nanosleep syz-executor.1 69639 41644 0 0 3 0x14200 acct acct 20198 327257 1 0 3 0x100083 ttyin getty 82724 1263 0 0 3 0x14200 bored sosplice 40078 196785 4498 0 3 0x82 thrsleep syz-fuzzer 40078 399783 4498 0 3 0x4000082 thrsleep syz-fuzzer 40078 188747 4498 0 3 0x4000082 thrsleep syz-fuzzer 40078 294562 4498 0 3 0x4000082 thrsleep syz-fuzzer 40078 408537 4498 0 3 0x4000082 thrsleep syz-fuzzer 40078 493464 4498 0 3 0x4000082 kqread syz-fuzzer 40078 48085 4498 0 3 0x4000082 thrsleep syz-fuzzer 4498 137643 36207 0 3 0x10008a pause ksh 36207 352593 73976 0 3 0x92 select sshd 73976 487024 1 0 3 0x80 select sshd 48124 242296 78496 73 3 0x100090 kqread syslogd 78496 519657 1 0 3 0x100082 netio syslogd 16455 265985 1 77 3 0x100090 poll dhclient 28785 191600 1 0 3 0x80 poll dhclient 63768 195182 0 0 2 0x14200 zerothread 9700 50927 0 0 3 0x14200 aiodoned aiodoned 66854 6746 0 0 3 0x14200 syncer update 76383 246708 0 0 3 0x14200 cleaner cleaner 91019 345689 0 0 3 0x14200 reaper reaper 49042 47387 0 0 3 0x14200 pgdaemon pagedaemon 73549 50337 0 0 3 0x14200 bored crynlk 60274 405234 0 0 3 0x14200 bored crypto 8655 136553 0 0 3 0x40014200 acpi0 acpi0 61385 413052 0 0 3 0x14200 bored softnet 69307 453325 0 0 2 0x14200 systqmp 29442 359156 0 0 3 0x14200 bored systq 41303 326448 0 0 3 0x40014200 bored softclock 17958 90015 0 0 3 0x40014200 idle0 1181 100449 0 0 3 0x14200 bored smr 1 205489 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 9538 6539K 7095K 78643K 14336 0 0 pcb 15 8K 8K 78643K 217 0 0 rtable 112 4K 4K 78643K 513 0 0 ifaddr 64 14K 14K 78643K 165 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 93 0 0 iov 0 0K 16K 78643K 155 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1212 76K 77K 78643K 2518 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 23 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 12 0K 0K 78643K 165 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 6 17K 25K 78643K 1452 0 0 sigio 0 0K 0K 78643K 14 0 0 proc 49 38K 63K 78643K 602 0 0 subproc 32 2K 2K 78643K 87 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 134 0 0 in_multi 33 2K 2K 78643K 103 0 0 ether_multi 2 0K 0K 78643K 6 0 0 mrt 2 0K 0K 78643K 4 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 66 291K 291K 78643K 66 0 0 exec 0 0K 1K 78643K 366 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 25K 78643K 4283 0 0 UVM aobj 57 2K 2K 78643K 66 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 202 0 0 NDP 14 0K 0K 78643K 49 0 0 temp 184 3539K 3607K 78643K 28047 0 0 kqueue 0 0K 0K 78643K 19 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 12 0 6 1 0 1 1 0 8 0 rtpcb 80 70 0 68 1 0 1 1 0 8 0 rtentry 112 76 0 32 2 0 2 2 0 8 0 unpcb 120 595 0 587 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 4398 0 4398 1 1 0 1 0 8 0 tcpcb 544 298 0 294 1 0 1 1 0 8 0 ipq 40 8 0 8 4 3 1 1 0 8 1 ipqe 40 22 0 22 4 3 1 1 0 8 1 inpcb 280 887 0 878 3 2 1 2 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 10 0 6 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 15 0 15 8 8 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 380 0 132 16 0 16 16 0 8 0 art_table 32 381 0 132 3 0 3 3 0 8 0 art_node 16 75 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 4 1 0 1 1 0 8 0 semapl 112 163 0 153 1 0 1 1 0 8 0 shmpl 112 64 0 9 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3563 0 2179 46 0 46 46 0 8 0 ffsino 240 3563 0 2179 83 0 83 83 0 8 0 nchpl 144 5788 0 4197 60 0 60 60 0 8 0 uvmvnodes 72 4512 0 0 83 0 83 83 0 8 0 vnodes 208 4512 0 0 238 0 238 238 0 8 0 namei 1024 17355 0 17355 2 1 1 1 0 8 1 scxspl 192 17005 0 17005 9 8 1 7 0 8 1 plimitpl 152 127 0 120 1 0 1 1 0 8 0 sigapl 432 1615 0 1601 2 0 2 2 0 8 0 futexpl 56 24043 0 24042 1 0 1 1 0 8 0 knotepl 112 325 0 306 1 0 1 1 0 8 0 kqueuepl 104 316 0 314 1 0 1 1 0 8 0 pipepl 112 930 0 911 2 1 1 2 0 8 0 fdescpl 424 1616 0 1601 2 0 2 2 0 8 0 filepl 120 9686 0 9579 4 0 4 4 0 8 0 lockfpl 104 509 0 508 1 0 1 1 0 8 0 lockfspl 48 155 0 154 1 0 1 1 0 8 0 sessionpl 112 21 0 11 1 0 1 1 0 8 0 pgrppl 48 27 0 17 1 0 1 1 0 8 0 ucredpl 96 1804 0 1797 1 0 1 1 0 8 0 zombiepl 144 1602 0 1601 2 1 1 1 0 8 0 processpl 864 1632 0 1601 4 0 4 4 0 8 0 procpl 632 3414 0 3376 4 0 4 4 0 8 0 sosppl 128 17 0 17 4 4 0 1 0 8 0 sockpl 384 1573 0 1554 3 0 3 3 0 8 1 mcl64k 65536 40 0 40 4 3 1 1 0 8 1 mcl16k 16384 9 0 9 4 3 1 1 0 8 1 mcl12k 12288 21 0 21 5 4 1 1 0 8 1 mcl9k 9216 13 0 13 8 7 1 1 0 8 1 mcl8k 8192 28 0 28 6 5 1 1 0 8 1 mcl4k 4096 93 0 93 2 1 1 1 0 8 1 mcl2k2 2112 5 0 5 3 3 0 1 0 8 0 mcl2k 2048 57822 0 57781 18 12 6 13 0 8 0 mtagpl 80 46 0 38 2 1 1 1 0 8 0 mbufpl 256 100573 0 100467 15 4 11 11 0 8 1 bufpl 256 11175 0 4072 445 0 445 445 0 8 0 anonpl 16 163616 0 150267 94 31 63 69 0 62 7 amapchunkpl 152 7268 0 7158 26 21 5 15 0 158 0 amappl16 192 8367 0 7626 89 50 39 49 0 8 1 amappl15 184 9 0 7 1 0 1 1 0 8 0 amappl14 176 938 0 933 1 0 1 1 0 8 0 amappl13 168 241 0 241 1 1 0 1 0 8 0 amappl12 160 15 0 12 1 0 1 1 0 8 0 amappl11 152 54 0 43 1 0 1 1 0 8 0 amappl10 144 251 0 246 1 0 1 1 0 8 0 amappl9 136 606 0 600 1 0 1 1 0 8 0 amappl8 128 183 0 162 1 0 1 1 0 8 0 amappl7 120 292 0 284 1 0 1 1 0 8 0 amappl6 112 69 0 61 1 0 1 1 0 8 0 amappl5 104 192 0 182 1 0 1 1 0 8 0 amappl4 96 1674 0 1649 1 0 1 1 0 8 0 amappl3 88 1196 0 1189 1 0 1 1 0 8 0 amappl2 80 12245 0 12171 3 1 2 3 0 8 0 amappl1 72 37391 0 36964 28 19 9 20 0 8 0 amappl 80 3717 0 3678 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 65 0 9 1 0 1 1 0 8 0 uaddrrnd 24 1616 0 1601 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1616 0 1601 1 0 1 1 0 8 0 vmmpekpl 168 13885 0 13864 2 0 2 2 0 8 0 vmmpepl 168 195977 0 194086 164 78 86 108 0 357 3 vmsppl 272 1615 0 1601 3 2 1 2 0 8 0 pdppl 4096 3238 0 3202 6 1 5 6 0 8 0 pvpl 32 493807 0 477250 291 56 235 266 0 265 101 pmappl 200 1615 0 1601 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 611 0 34 17 0 17 17 0 8 0