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(77e56089648e0249,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d65b00,ffff8000159102f8) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d64440,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d64440,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d64420,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64400,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d643e0,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64360,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64340,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64320,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64300,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d642e0,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64260,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64240,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d641a0,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64160,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64140,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d640e0,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d640c0,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64080,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64060,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64020,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64000,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64040,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d640a0,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64100,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64120,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64180,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d641c0,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d641e0,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64200,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64220,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64280,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d642a0,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d64f60,ffffffff81c07910,ffff8000159102f8) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff81c07910,ffff8000159102f8) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff81f40050,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd80363cfd88) at ip6_mrouter_done+0xb5 rip6_detach(fffffd80363cfd88) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd80363cfd88,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd803e719270,ffff8000ffff3160) at soo_close+0x40 fdrop(fffffd803e719270,ffff8000ffff3160) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd803e719270,ffff8000ffff3160) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff3160) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff3160,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff3160,ffff800015910790,ffff8000159107e0) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800015910860) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffe6a54) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe6a20, count: -47 ddb> show registers rdi 0x77e56089648e0249 rsi 0 rbp 0xffff80001590f030 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x2af4cce5d2115ad5 r12 0 r13 0xfffffd8036d64440 r14 0 r15 0x77e56089648e0249 rip 0xffffffff81f4007b mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001590eff0 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.1) pid=161105 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2018,0xffffffff825a0168 process=0xffff8000ffff6a30 user=0xffff80001590b000, vmspace=0xfffffd803f013990 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 91007 132585 62953 0 3 0x82 nanosleep syz-executor.1 41780 27611 0 0 3 0x14200 acct acct 1894 461108 1 0 3 0x100083 ttyin getty 16895 323088 0 0 3 0x14200 bored sosplice 99208 361224 62953 0 3 0x82 nanosleep syz-executor.0 62953 318702 82407 0 3 0x82 thrsleep syz-fuzzer 62953 215595 82407 0 3 0x4000082 thrsleep syz-fuzzer 62953 297336 82407 0 3 0x4000082 thrsleep syz-fuzzer 62953 176780 82407 0 3 0x4000082 thrsleep syz-fuzzer 62953 97935 82407 0 3 0x4000082 thrsleep syz-fuzzer 62953 30286 82407 0 3 0x4000082 kqread syz-fuzzer 62953 495732 82407 0 3 0x4000082 thrsleep syz-fuzzer 82407 193958 77222 0 3 0x10008a pause ksh 77222 100870 84561 0 3 0x92 select sshd 84561 40340 1 0 3 0x80 select sshd 33022 314622 36697 73 3 0x100090 kqread syslogd 36697 437408 1 0 3 0x100082 netio syslogd 50958 350992 1 77 3 0x100090 poll dhclient 39293 15077 1 0 3 0x80 poll dhclient 13883 32871 0 0 2 0x14200 zerothread 89325 257237 0 0 3 0x14200 aiodoned aiodoned 6993 58227 0 0 3 0x14200 syncer update 45414 391944 0 0 3 0x14200 cleaner cleaner 93630 196843 0 0 3 0x14200 reaper reaper 30572 238692 0 0 3 0x14200 pgdaemon pagedaemon 87958 214116 0 0 3 0x14200 bored crynlk 92056 20759 0 0 3 0x14200 bored crypto 1993 39597 0 0 3 0x40014200 acpi0 acpi0 23901 451410 0 0 3 0x14200 bored softnet 65205 31269 0 0 2 0x14200 systqmp 20420 76889 0 0 3 0x14200 bored systq 13577 449835 0 0 3 0x40014200 bored softclock 80727 194515 0 0 3 0x40014200 idle0 81115 166216 0 0 3 0x14200 bored smr 1 685 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 9464 6334K 6770K 78643K 11289 0 0 pcb 15 8K 8K 78643K 52 0 0 rtable 112 4K 4K 78643K 287 0 0 ifaddr 42 11K 11K 78643K 66 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 34 0 0 iov 0 0K 16K 78643K 24 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1213 76K 76K 78643K 1462 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 12 0K 0K 78643K 24 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 5 13K 25K 78643K 287 0 0 proc 49 38K 55K 78643K 420 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 2 0 0 in_multi 33 2K 2K 78643K 44 0 0 ether_multi 2 0K 0K 78643K 2 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 210 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 89 20K 21K 78643K 1497 0 0 UVM aobj 8 2K 2K 78643K 8 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 44 0 0 NDP 7 0K 0K 78643K 19 0 0 temp 108 3528K 3593K 78643K 16298 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 8 0 2 1 0 1 1 0 8 0 rtpcb 80 33 0 31 1 0 1 1 0 8 0 rtentry 112 56 0 12 2 0 2 2 0 8 0 unpcb 120 145 0 137 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 1 0 1 1 0 1 1 0 8 1 tcpqe 32 1882 0 1882 1 1 0 1 0 8 0 tcpcb 544 48 0 44 1 0 1 1 0 8 0 inpcb 280 160 0 151 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 ppxss 1128 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 255 0 43 14 0 14 14 0 8 0 art_table 32 256 0 43 2 0 2 2 0 8 0 art_node 16 55 0 14 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 22 0 12 1 0 1 1 0 8 0 shmpl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1775 0 379 46 0 46 46 0 8 0 ffsino 240 1775 0 379 83 0 83 83 0 8 0 nchpl 144 2331 0 734 60 0 60 60 0 8 0 uvmvnodes 72 2004 0 0 37 0 37 37 0 8 0 vnodes 208 2004 0 0 106 0 106 106 0 8 0 namei 1024 6302 0 6302 2 1 1 1 0 8 1 scxspl 192 6592 0 6592 9 8 1 7 0 8 1 plimitpl 152 35 0 28 1 0 1 1 0 8 0 sigapl 432 456 0 443 2 0 2 2 0 8 0 futexpl 56 4196 0 4196 1 0 1 1 0 8 1 knotepl 112 109 0 90 1 0 1 1 0 8 0 kqueuepl 104 52 0 50 1 0 1 1 0 8 0 pipepl 112 250 0 231 1 0 1 1 0 8 0 fdescpl 424 457 0 443 2 0 2 2 0 8 0 filepl 120 2552 0 2455 4 0 4 4 0 8 0 lockfpl 104 107 0 106 1 0 1 1 0 8 0 lockfspl 48 32 0 31 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 21 0 11 1 0 1 1 0 8 0 ucredpl 96 358 0 351 1 0 1 1 0 8 0 zombiepl 144 446 0 444 2 1 1 1 0 8 0 processpl 864 475 0 444 4 0 4 4 0 8 0 procpl 632 794 0 757 4 0 4 4 0 8 0 sosppl 128 5 0 5 2 1 1 1 0 8 1 sockpl 384 343 0 324 3 0 3 3 0 8 1 mcl64k 65536 9 0 9 2 1 1 1 0 8 1 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl12k 12288 8 0 8 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 6 0 6 2 1 1 1 0 8 1 mcl4k 4096 23 0 23 2 1 1 1 0 8 1 mcl2k2 2112 4 0 4 1 1 0 1 0 8 0 mcl2k 2048 58412 0 58368 17 10 7 14 0 8 1 mtagpl 80 12 0 8 2 1 1 1 0 8 0 mbufpl 256 94247 0 94146 13 5 8 9 0 8 0 bufpl 256 6765 0 1829 309 0 309 309 0 8 0 anonpl 16 48523 0 38233 53 3 50 51 0 62 0 amapchunkpl 152 1990 0 1887 9 3 6 7 0 158 1 amappl16 192 1877 0 1194 35 0 35 35 0 8 0 amappl15 184 118 0 117 2 1 1 1 0 8 0 amappl14 176 36 0 32 1 0 1 1 0 8 0 amappl13 168 26 0 24 1 0 1 1 0 8 0 amappl12 160 21 0 18 1 0 1 1 0 8 0 amappl11 152 46 0 35 1 0 1 1 0 8 0 amappl10 144 104 0 103 1 0 1 1 0 8 0 amappl9 136 573 0 566 1 0 1 1 0 8 0 amappl8 128 147 0 129 1 0 1 1 0 8 0 amappl7 120 142 0 137 1 0 1 1 0 8 0 amappl6 112 66 0 57 1 0 1 1 0 8 0 amappl5 104 189 0 177 1 0 1 1 0 8 0 amappl4 96 694 0 669 1 0 1 1 0 8 0 amappl3 88 120 0 114 1 0 1 1 0 8 0 amappl2 80 2903 0 2837 3 1 2 3 0 8 0 amappl1 72 17877 0 17465 27 18 9 20 0 8 0 amappl 80 1019 0 984 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 457 0 443 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 457 0 443 1 0 1 1 0 8 0 vmmpekpl 168 7156 0 7132 2 0 2 2 0 8 0 vmmpepl 168 60413 0 58693 121 22 99 99 0 357 22 vmsppl 272 456 0 443 2 1 1 2 0 8 0 pdppl 4096 920 0 886 6 1 5 6 0 8 0 pvpl 32 170418 0 157170 133 4 129 130 0 265 5 pmappl 200 456 0 443 1 0 1 1 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 460 0 24 13 0 13 13 0 8 0