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(473c17613e47397b,0,0) at mrouter6_rtwalk_delete+0x2b sys/netinet6/ip6_mroute.c:502 rtable_walk_helper(fffffd8036d6da40,ffff800017921b18) at rtable_walk_helper+0x58 sys/net/rtable.c:683 art_table_walk(ffff800000075880,fffffd8036d6c280,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x226 art_walk_apply sys/net/art.c:676 [inline] art_table_walk(ffff800000075880,fffffd8036d6c280,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x226 sys/net/art.c:648 art_table_walk(ffff800000075880,fffffd8036d6c260,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c200,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c1c0,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c1a0,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c180,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c160,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c100,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c0c0,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c060,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c020,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c000,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c040,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c080,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c0a0,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c0e0,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c120,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c140,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c1e0,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c220,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c240,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c2a0,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c2e0,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c300,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c340,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c360,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c380,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c3c0,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c400,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c480,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6c4c0,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_table_walk(ffff800000075880,fffffd8036d6cf40,ffffffff814f7bd0,ffff800017921b18) at art_table_walk+0x2a6 sys/net/art.c:657 art_walk(ffff800000075880,ffffffff814f7bd0,ffff800017921b18) at art_walk+0xcf sys/net/art.c:595 rtable_walk(0,18,0,ffffffff819969d0,0) at rtable_walk+0xd4 ip6_mrouter_done(fffffd8038abb300) at ip6_mrouter_done+0xb5 rip6_detach(fffffd8038abb300) at rip6_detach+0x56 sys/netinet6/raw_ip6.c:757 soclose(fffffd8038abb300,0) at soclose+0xb2 sys/kern/uipc_socket.c:303 soo_close(fffffd803ad35178,ffff8000ffff38c8) at soo_close+0x40 fdrop(fffffd803ad35178,ffff8000ffff38c8) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd803ad35178,ffff8000ffff38c8) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff38c8) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff38c8,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff38c8,ffff800017921fb0,ffff800017922000) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800017922080) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,1,0,1,0,7f7ffffca464) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffca430, count: -47 ddb> show registers rdi 0x473c17613e47397b rsi 0 rbp 0xffff800017920850 rbx 0xffff800000075888 rdx 0 rcx 0 rax 0x204 r8 0 r9 0x5 r10 0 r11 0x997b45e537b4082d r12 0 r13 0xfffffd8036d6c280 r14 0 r15 0x473c17613e47397b rip 0xffffffff819969fb mrouter6_rtwalk_delete+0x2b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800017920810 ss 0x10 mrouter6_rtwalk_delete+0x2b: movl 0x5c(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=491290 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2018,0xffff8000ffff2c80 process=0xffff8000148a2018 user=0xffff80001791d000, vmspace=0xfffffd803f014220 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 77283 80673 32420 0 2 0 syz-executor.1 77283 53703 32420 0 3 0x4000080 fsleep syz-executor.1 77283 164221 32420 0 3 0x4000080 fsleep syz-executor.1 42873 420424 0 0 3 0x14200 acct acct 66528 403822 0 0 3 0x14200 bored sosplice 27709 362392 48001 0 3 0x82 nanosleep syz-executor.0 32420 353145 48001 0 3 0x82 nanosleep syz-executor.1 48001 18035 31878 0 3 0x82 thrsleep syz-fuzzer 48001 78387 31878 0 3 0x4000082 thrsleep syz-fuzzer 48001 125298 31878 0 3 0x4000082 kqread syz-fuzzer 48001 151933 31878 0 3 0x4000082 thrsleep syz-fuzzer 48001 500510 31878 0 3 0x4000082 thrsleep syz-fuzzer 48001 250640 31878 0 3 0x4000082 thrsleep syz-fuzzer 48001 227992 31878 0 3 0x4000082 thrsleep syz-fuzzer 31878 216671 98345 0 3 0x10008a pause ksh 98345 196332 8403 0 3 0x92 select sshd 46521 510205 1 0 3 0x100083 ttyin getty 8403 6972 1 0 3 0x80 select sshd 57973 222759 81561 73 3 0x100090 kqread syslogd 81561 34034 1 0 3 0x100082 netio syslogd 70957 64427 1 77 3 0x100090 poll dhclient 98006 410695 1 0 3 0x80 poll dhclient 50987 336963 0 0 2 0x14200 zerothread 19328 76369 0 0 3 0x14200 aiodoned aiodoned 96397 428536 0 0 3 0x14200 syncer update 4011 513079 0 0 3 0x14200 cleaner cleaner 9149 95792 0 0 3 0x14200 reaper reaper 17429 422369 0 0 3 0x14200 pgdaemon pagedaemon 99925 468443 0 0 3 0x14200 bored crynlk 40791 340713 0 0 3 0x14200 bored crypto 89273 420117 0 0 3 0x40014200 acpi0 acpi0 98437 291239 0 0 3 0x14200 bored softnet 94891 514074 0 0 2 0x14200 systqmp 15008 434091 0 0 3 0x14200 bored systq 20760 65569 0 0 3 0x40014200 bored softclock 76293 129717 0 0 3 0x40014200 idle0 61054 337082 0 0 3 0x14200 bored smr 1 12329 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 9487 6461K 6764K 78643K 11345 0 0 pcb 15 8K 8K 78643K 43 0 0 rtable 109 3K 4K 78643K 305 0 0 ifaddr 48 11K 11K 78643K 73 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 33 0 0 iov 0 0K 16K 78643K 36 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1216 76K 77K 78643K 1529 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 6 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 12 0K 0K 78643K 38 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12723 0 0 file desc 6 17K 25K 78643K 361 0 0 sigio 0 0K 0K 78643K 8 0 0 proc 49 38K 63K 78643K 480 0 0 subproc 32 2K 2K 78643K 68 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 23 0 0 in_multi 33 2K 2K 78643K 58 0 0 ether_multi 2 0K 0K 78643K 3 0 0 mrt 2 0K 0K 78643K 3 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 60 265K 265K 78643K 60 0 0 exec 0 0K 1K 78643K 243 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 23K 78643K 1696 0 0 UVM aobj 15 2K 2K 78643K 18 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 25 0 0 NDP 9 0K 0K 78643K 22 0 0 temp 123 3528K 3593K 78643K 21155 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 10 0 4 1 0 1 1 0 8 0 rtpcb 80 27 0 25 1 0 1 1 0 8 0 rtentry 112 66 0 22 2 0 2 2 0 8 0 unpcb 120 165 0 157 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 7167 0 7167 1 1 0 1 0 8 0 tcpcb 544 66 0 62 1 0 1 1 0 8 0 inpcb 280 190 0 181 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 8 0 4 1 0 1 1 0 8 0 ppxss 1128 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 301 0 90 14 0 14 14 0 8 0 art_table 32 302 0 90 2 0 2 2 0 8 0 art_node 16 65 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 1 0 1 1 0 8 1 semapl 112 36 0 26 1 0 1 1 0 8 0 shmpl 112 16 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1907 0 513 46 0 46 46 0 8 0 ffsino 240 1907 0 513 83 0 83 83 0 8 0 nchpl 144 2593 0 993 60 0 60 60 0 8 0 uvmvnodes 72 2171 0 0 40 0 40 40 0 8 0 vnodes 208 2171 0 0 115 0 115 115 0 8 0 namei 1024 7175 0 7175 3 2 1 1 0 8 1 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 10462 0 10462 10 9 1 7 0 8 1 plimitpl 152 52 0 45 1 0 1 1 0 8 0 sigapl 432 526 0 512 2 0 2 2 0 8 0 futexpl 56 5331 0 5329 2 1 1 1 0 8 0 knotepl 112 156 0 137 1 0 1 1 0 8 0 kqueuepl 104 92 0 90 1 0 1 1 0 8 0 pipepl 112 378 0 359 3 1 2 2 0 8 1 fdescpl 424 527 0 512 2 0 2 2 0 8 0 filepl 120 2964 0 2863 7 2 5 5 0 8 1 lockfpl 104 84 0 83 1 0 1 1 0 8 0 lockfspl 48 34 0 33 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 25 0 15 1 0 1 1 0 8 0 ucredpl 96 423 0 416 1 0 1 1 0 8 0 zombiepl 144 513 0 512 2 1 1 1 0 8 0 processpl 864 543 0 512 4 0 4 4 0 8 0 procpl 632 946 0 907 5 0 5 5 0 8 1 sosppl 128 8 0 8 1 1 0 1 0 8 0 sockpl 384 384 0 365 5 2 3 4 0 8 1 mcl64k 65536 12 0 12 3 2 1 1 0 8 1 mcl16k 16384 3 0 3 2 1 1 1 0 8 1 mcl12k 12288 6 0 6 2 1 1 1 0 8 1 mcl9k 9216 5 0 5 2 1 1 1 0 8 1 mcl8k 8192 5 0 5 2 1 1 1 0 8 1 mcl4k 4096 24 0 24 3 2 1 1 0 8 1 mcl2k2 2112 4 0 4 2 1 1 1 0 8 1 mcl2k 2048 46849 0 46803 23 16 7 19 0 8 0 mtagpl 80 8 0 5 2 1 1 1 0 8 0 mbufpl 256 78577 0 78483 14 6 8 11 0 8 1 bufpl 256 8920 0 1742 449 0 449 449 0 8 0 anonpl 16 67743 0 55431 88 11 77 86 0 62 24 amapchunkpl 152 2787 0 2682 18 9 9 16 0 158 4 amappl16 192 2382 0 1690 47 10 37 47 0 8 2 amappl14 176 188 0 183 1 0 1 1 0 8 0 amappl13 168 9 0 7 1 0 1 1 0 8 0 amappl12 160 16 0 14 1 0 1 1 0 8 0 amappl11 152 53 0 42 1 0 1 1 0 8 0 amappl10 144 75 0 73 1 0 1 1 0 8 0 amappl9 136 681 0 672 1 0 1 1 0 8 0 amappl8 128 248 0 226 1 0 1 1 0 8 0 amappl7 120 108 0 102 1 0 1 1 0 8 0 amappl6 112 68 0 60 1 0 1 1 0 8 0 amappl5 104 169 0 158 1 0 1 1 0 8 0 amappl4 96 674 0 646 1 0 1 1 0 8 0 amappl3 88 338 0 331 1 0 1 1 0 8 0 amappl2 80 3290 0 3217 3 1 2 3 0 8 0 amappl1 72 19082 0 18662 26 17 9 20 0 8 0 amappl 80 1190 0 1153 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 17 0 3 1 0 1 1 0 8 0 uaddrrnd 24 527 0 512 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 527 0 512 1 0 1 1 0 8 0 vmmpekpl 168 7748 0 7723 2 0 2 2 0 8 0 vmmpepl 168 69288 0 67454 131 40 91 100 0 357 11 vmsppl 272 526 0 512 2 1 1 2 0 8 0 pdppl 4096 1060 0 1024 6 1 5 6 0 8 0 pvpl 32 266442 0 250971 326 48 278 308 0 265 149 pmappl 200 526 0 512 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