uvm_fault(0xfffffd803f014550, 0x12, 0, 1) -> e kernel: page fault trap, code=0 Stopped at in6_purgeaddr+0x135: movq 0x8(%r12),%r13 ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel page fault uvm_fault(0xfffffd803f014550, 0x12, 0, 1) -> e in6_purgeaddr(ffff800000e68b00) at in6_purgeaddr+0x135 sys/netinet6/in6.c:914 end trace frame: 0xffff80001487dbf0, count: 0 ddb> trace in6_purgeaddr(ffff800000e68b00) at in6_purgeaddr+0x135 sys/netinet6/in6.c:914 in6_ifdetach(ffff800000b36800) at in6_ifdetach+0x74 sys/netinet6/in6_ifattach.c:422 if_detach(ffff800000b36800) at if_detach+0x185 sys/net/if.c:1127 tun_clone_destroy(ffff800000b36800) at tun_clone_destroy+0x1c0 sys/net/if_tun.c:278 spec_close(ffff80001487dd20) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd80361d1b60,7,fffffd803f7c6960,ffff8000ffff3160) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd802e9826a8,ffff8000ffff3160) at vn_closefile+0xd3 vn_close sys/kern/vfs_vnops.c:301 [inline] vn_closefile(fffffd802e9826a8,ffff8000ffff3160) at vn_closefile+0xd3 sys/kern/vfs_vnops.c:613 fdrop(fffffd802e9826a8,ffff8000ffff3160) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802e9826a8,ffff8000ffff3160) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff3160) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff3160,19,1) at exit1+0x32f sys/kern/kern_exit.c:196 postsig(ffff8000ffff3160,19) at postsig+0x4a6 sigexit sys/kern/kern_sig.c:1499 [inline] postsig(ffff8000ffff3160,19) at postsig+0x4a6 sys/kern/kern_sig.c:1431 userret(ffff8000ffff3160) at userret+0x159 sys/kern/kern_sig.c:1889 syscall(ffff80001487e1a0) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:115 [inline] syscall(ffff80001487e1a0) at syscall+0x42e sys/arch/amd64/amd64/trap.c:577 Xsyscall(6,38,7f7ffffe9ed0,3,0,b27897e9000) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe9ec0, count: -15 ddb> show registers rdi 0 rsi 0 rbp 0xffff80001487db80 rbx 0 rdx 0x7 rcx 0xfffffd803a7acb00 rax 0 r8 0xffff800000aa8d00 r9 0x1 r10 0xd728a69c3b03929e r11 0x337d355e992f9aab r12 0xa r13 0 r14 0xffff800000e68b00 r15 0xffff800000b36800 rip 0xffffffff82085775 in6_purgeaddr+0x135 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80001487db10 ss 0x10 in6_purgeaddr+0x135: movq 0x8(%r12),%r13 ddb> show proc PROC (syz-executor.1) pid=448626 stat=onproc flags process=a proc=2000 pri=17, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2290,0xffffffff8255a198 process=0xffff8000ffff7450 user=0xffff800014879000, vmspace=0xfffffd803f014550 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 31050 269147 20075 0 3 0x82 wait syz-executor.0 99918 228537 0 0 3 0x14200 acct acct 47378 333359 0 0 3 0x14200 bored sosplice 20075 486992 47079 0 3 0x82 thrsleep syz-fuzzer 20075 45219 47079 0 2 0x4000482 syz-fuzzer 20075 293875 47079 0 3 0x4000082 thrsleep syz-fuzzer 20075 427346 47079 0 3 0x4000082 thrsleep syz-fuzzer 20075 207937 47079 0 2 0x4000482 syz-fuzzer 20075 47381 47079 0 3 0x4000082 thrsleep syz-fuzzer 20075 234894 47079 0 3 0x4000082 thrsleep syz-fuzzer 20075 302822 47079 0 2 0x4000082 syz-fuzzer 20075 488792 47079 0 3 0x4000082 thrsleep syz-fuzzer 47079 30756 5453 0 3 0x10008a pause ksh 5453 124221 58090 0 3 0x92 select sshd 85001 411647 1 0 3 0x100083 ttyin getty 58090 145353 1 0 3 0x80 select sshd 13130 212499 76037 73 2 0x100010 syslogd 76037 89174 1 0 3 0x100082 netio syslogd 26071 90846 0 0 2 0x14200 zerothread 34105 145404 0 0 3 0x14200 aiodoned aiodoned 33995 490532 0 0 2 0x14200 update 6461 193600 0 0 3 0x14200 cleaner cleaner 8233 415188 0 0 2 0x14200 reaper 23345 156645 0 0 3 0x14200 pgdaemon pagedaemon 42837 36907 0 0 3 0x14200 bored crynlk 65676 499760 0 0 3 0x14200 bored crypto 25757 354194 0 0 3 0x40014200 acpi0 acpi0 38823 348182 0 0 2 0x14200 softnet 20571 98609 0 0 2 0x14200 systqmp 64660 383999 0 0 3 0x14200 bored systq 70529 332920 0 0 3 0x40014200 bored softclock 38204 424126 0 0 3 0x40014200 idle0 98909 355375 0 0 3 0x14200 bored smr 1 283373 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 9563 6945K 14066K 78643K 39385 0 0 pcb 13 11K 13K 78643K 1934 0 0 rtable 114 12K 13K 78643K 2778 0 0 ifaddr 90 21K 22K 78643K 869 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 333 0 0 iov 0 0K 36K 78643K 1822 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1313 82K 83K 78643K 9585 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 71 0 0 VM map 55 13K 13K 78643K 70 0 0 sem 12 1K 1K 78643K 1333 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 4 9K 25K 78643K 4991 0 0 sigio 0 0K 0K 78643K 123 0 0 proc 45 30K 55K 78643K 2184 0 0 subproc 23 1K 2K 78643K 614 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 1332 0 0 in_multi 25 1K 2K 78643K 667 0 0 ether_multi 1 0K 0K 78643K 68 0 0 mrt 2 0K 0K 78643K 51 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 96 424K 424K 78643K 96 0 0 exec 0 0K 1K 78643K 1146 0 0 pfkey data 0 0K 4K 78643K 2 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 201 466K 466K 78643K 13503 0 0 UVM aobj 130 4K 4K 78643K 137 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 1079 0 0 NDP 20 0K 1K 78643K 283 0 0 temp 206 3544K 4184K 78643K 142934 0 0 kqueue 0 0K 0K 78643K 93 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 64 102 0 97 1 0 1 1 0 8 0 rtpcb 80 1262 0 1262 5 5 0 1 0 8 0 rtentry 112 609 0 568 2 0 2 2 0 8 0 unpcb 120 4044 0 4035 2 1 1 2 0 8 0 syncache 264 32 0 32 12 12 0 1 0 8 0 tcpqe 32 185 0 185 6 6 0 1 0 8 0 tcpcb 544 3708 0 3704 53 52 1 15 0 8 0 ipq 40 56 0 56 17 17 0 1 0 8 0 ipqe 40 1387 0 1387 17 17 0 1 0 8 0 inpcb 280 11754 0 11750 39 38 1 9 0 8 0 rttmr 72 17 0 16 5 4 1 1 0 8 0 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 6 0 6 1 1 0 1 0 8 0 nd6 48 89 0 87 1 0 1 1 0 8 0 pkpcb 40 19 0 19 6 6 0 1 0 8 0 swfcl 56 5 0 0 1 0 1 1 0 8 0 ppxss 1128 101 0 101 19 19 0 1 0 8 0 art_heap8 4096 22 0 20 8 6 2 5 0 8 0 art_heap4 256 2666 0 2416 32 14 18 19 0 8 0 art_table 32 2688 0 2436 4 1 3 3 0 8 0 art_node 16 608 0 565 1 0 1 1 0 8 0 sysvmsgpl 40 26 0 20 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1331 0 1321 1 0 1 1 0 8 0 shmpl 112 135 0 7 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 9610 0 8205 46 0 46 46 0 8 0 ffsino 240 9610 0 8205 84 1 83 84 0 8 0 nchpl 144 17964 0 17517 60 40 20 60 0 8 0 uvmvnodes 72 8538 0 0 156 0 156 156 0 8 0 vnodes 208 8538 0 0 450 0 450 450 0 8 0 namei 1024 70204 0 70204 7 6 1 1 0 8 1 vcpupl 1984 53 0 0 7 0 7 7 0 8 0 vmpool 520 68 0 15 6 2 4 4 0 8 0 scsiplug 64 4 0 4 2 2 0 1 0 8 0 scxspl 192 67559 0 67559 25 24 1 7 0 8 1 plimitpl 152 441 0 434 1 0 1 1 0 8 0 sigapl 432 5059 0 5049 2 0 2 2 0 8 0 futexpl 56 204668 0 204668 9 9 0 1 0 8 0 knotepl 112 1347 0 1328 9 8 1 2 0 8 0 kqueuepl 104 2053 0 2051 10 9 1 4 0 8 0 pipepl 112 3374 0 3356 12 11 1 2 0 8 0 fdescpl 424 5060 0 5049 2 0 2 2 0 8 0 filepl 120 57995 0 57921 63 60 3 11 0 8 0 lockfpl 104 2686 0 2686 6 6 0 1 0 8 0 lockfspl 48 770 0 770 6 6 0 1 0 8 0 sessionpl 112 51 0 43 1 0 1 1 0 8 0 pgrppl 48 131 0 123 1 0 1 1 0 8 0 ucredpl 96 5497 0 5491 1 0 1 1 0 8 0 zombiepl 144 5055 0 5053 1 0 1 1 0 8 0 processpl 864 5081 0 5053 4 0 4 4 0 8 0 procpl 632 10942 0 10906 4 0 4 4 0 8 0 sosppl 128 83 0 83 17 17 0 1 0 8 0 sockpl 384 17410 0 17397 76 73 3 14 0 8 0 mcl64k 65536 1864 0 1864 130 130 0 33 0 8 0 mcl16k 16384 126 0 126 15 15 0 1 0 8 0 mcl12k 12288 284 0 284 7 7 0 1 0 8 0 mcl9k 9216 98 0 98 20 20 0 1 0 8 0 mcl8k 8192 367 0 367 7 7 0 1 0 8 0 mcl4k 4096 600 0 600 8 8 0 1 0 8 0 mcl2k2 2112 40 0 40 17 17 0 1 0 8 0 mcl2k 2048 82056 0 82018 23 17 6 17 0 8 0 mtagpl 80 261 0 251 5 4 1 1 0 8 0 mbufpl 256 196291 0 196188 212 197 15 29 0 8 4 bufpl 256 29103 0 20565 534 0 534 534 0 8 0 anonpl 16 701162 0 676233 220 119 101 105 0 62 0 amapchunkpl 152 31374 0 30954 146 129 17 31 0 158 0 amappl16 192 32812 0 31597 270 205 65 75 0 8 4 amappl15 184 1066 0 1066 7 7 0 1 0 8 0 amappl14 176 861 0 856 1 0 1 1 0 8 0 amappl13 168 110 0 110 3 3 0 1 0 8 0 amappl12 160 255 0 253 1 0 1 1 0 8 0 amappl11 152 865 0 860 1 0 1 1 0 8 0 amappl10 144 408 0 403 1 0 1 1 0 8 0 amappl9 136 1801 0 1797 1 0 1 1 0 8 0 amappl8 128 1386 0 1326 2 0 2 2 0 8 0 amappl7 120 593 0 583 1 0 1 1 0 8 0 amappl6 112 819 0 802 1 0 1 1 0 8 0 amappl5 104 1014 0 1007 1 0 1 1 0 8 0 amappl4 96 5071 0 5047 1 0 1 1 0 8 0 amappl3 88 1275 0 1264 1 0 1 1 0 8 0 amappl2 80 38610 0 38543 3 1 2 3 0 8 0 amappl1 72 104637 0 104246 27 19 8 20 0 8 0 amappl 80 11807 0 11737 2 0 2 2 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 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 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 64 136 0 7 3 0 3 3 0 8 0 uaddrrnd 24 5128 0 5049 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5128 0 5049 1 0 1 1 0 8 0 vmmpekpl 168 34843 0 34801 3 0 3 3 0 8 0 vmmpepl 168 636953 0 634581 435 297 138 154 0 357 24 vmsppl 272 5059 0 5048 4 3 1 2 0 8 0 pdppl 4096 10262 0 10179 16 5 11 11 0 8 0 pvpl 32 1946583 0 1917954 678 352 326 337 0 265 73 pmappl 200 5127 0 5063 7 3 4 4 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 1138 0 463 21 1 20 21 0 8 0