uvm_fault(0xfffffd803f014bb0, 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(0xfffffd803f014bb0, 0x12, 0, 1) -> e in6_purgeaddr(ffff800000b96200) at in6_purgeaddr+0x135 sys/netinet6/in6.c:914 end trace frame: 0xffff800015954f20, count: 0 ddb> trace in6_purgeaddr(ffff800000b96200) at in6_purgeaddr+0x135 sys/netinet6/in6.c:914 in6_ifdetach(ffff800000ab6800) at in6_ifdetach+0x74 sys/netinet6/in6_ifattach.c:422 if_detach(ffff800000ab6800) at if_detach+0x148 sys/net/if.c:1157 tun_clone_destroy(ffff800000ab6800) at tun_clone_destroy+0x1c0 sys/net/if_tun.c:278 spec_close(ffff800015955050) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd8036186820,7,fffffd803f7c6c00,ffff8000ffff8770) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd802c17d4c0,ffff8000ffff8770) at vn_closefile+0xd3 vn_close sys/kern/vfs_vnops.c:301 [inline] vn_closefile(fffffd802c17d4c0,ffff8000ffff8770) at vn_closefile+0xd3 sys/kern/vfs_vnops.c:613 fdrop(fffffd802c17d4c0,ffff8000ffff8770) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802c17d4c0,ffff8000ffff8770) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff8770) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff8770,9,1) at exit1+0x32f sys/kern/kern_exit.c:196 postsig(ffff8000ffff8770,9) at postsig+0x4a6 sigexit sys/kern/kern_sig.c:1499 [inline] postsig(ffff8000ffff8770,9) at postsig+0x4a6 sys/kern/kern_sig.c:1431 userret(ffff8000ffff8770) at userret+0x159 sys/kern/kern_sig.c:1889 syscall(ffff8000159554d0) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:115 [inline] syscall(ffff8000159554d0) at syscall+0x42e sys/arch/amd64/amd64/trap.c:577 Xsyscall(0,b,7d,b,17c59e,777fe01e000) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffea5c0, count: -15 ddb> show registers rdi 0 rsi 0 rbp 0xffff800015954eb0 rbx 0 rdx 0 rcx 0xfffffd8039ffee00 rax 0 r8 0xffff800000a75100 r9 0x1 r10 0x92e8fe629cc569a8 r11 0x70a82ffa8ad95e3a r12 0xa r13 0 r14 0xffff800000b96200 r15 0xffff800000ab6800 rip 0xffffffff8118f7c5 in6_purgeaddr+0x135 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff800015954e40 ss 0x10 in6_purgeaddr+0x135: movq 0x8(%r12),%r13 ddb> show proc PROC (syz-executor.1) pid=405199 stat=onproc flags process=a proc=2000 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff8000159633d8,0xffffffff8258bb98 process=0xffff8000ffff66d0 user=0xffff800015950000, vmspace=0xfffffd803f014bb0 estcpu=1, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 98477 119949 0 0 3 0x14200 acct acct 25773 467996 1 0 3 0x100083 ttyin getty 4208 279460 0 0 3 0x14200 bored sosplice 99044 392142 98033 0 3 0x82 thrsleep syz-fuzzer 99044 438815 98033 0 2 0x4000002 syz-fuzzer 99044 303403 98033 0 3 0x4000082 thrsleep syz-fuzzer 99044 108353 98033 0 3 0x4000082 thrsleep syz-fuzzer 99044 225336 98033 0 2 0x4000002 syz-fuzzer 99044 244496 98033 0 3 0x4000082 thrsleep syz-fuzzer 99044 70636 98033 0 3 0x4000082 thrsleep syz-fuzzer 99044 108775 98033 0 2 0x4000002 syz-fuzzer 99044 358022 98033 0 3 0x4000082 thrsleep syz-fuzzer 98033 499013 23987 0 3 0x10008a pause ksh 23987 272544 52752 0 3 0x92 select sshd 52752 175129 1 0 3 0x80 select sshd 28877 91048 68640 73 2 0x100010 syslogd 68640 284149 1 0 3 0x100082 netio syslogd 37251 3188 0 0 2 0x14200 zerothread 57067 33310 0 0 3 0x14200 aiodoned aiodoned 34209 354394 0 0 3 0x14200 syncer update 37608 413184 0 0 3 0x14200 cleaner cleaner 60778 519827 0 0 2 0x14200 reaper 42684 312598 0 0 3 0x14200 pgdaemon pagedaemon 43544 122641 0 0 3 0x14200 bored crynlk 58799 125124 0 0 3 0x14200 bored crypto 87053 264932 0 0 3 0x40014200 acpi0 acpi0 22630 70859 0 0 2 0x14200 softnet 94674 112654 0 0 2 0x14200 systqmp 55163 103325 0 0 3 0x14200 bored systq 98598 234247 0 0 3 0x40014200 bored softclock 84713 339185 0 0 3 0x40014200 idle0 9599 421533 0 0 3 0x14200 bored smr 1 507217 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 9592 6970K 8189K 78643K 37170 0 0 pcb 13 11K 12K 78643K 11115 0 0 rtable 172 17K 18K 78643K 7132 0 0 ifaddr 129 33K 35K 78643K 2098 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 819 0 0 iov 0 0K 32K 78643K 3099 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1219 77K 78K 78643K 11985 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 9K 78643K 174 0 0 VM map 118 29K 29K 78643K 172 0 0 sem 10 1K 1K 78643K 16 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 3 5K 25K 78643K 12136 0 0 sigio 0 0K 0K 78643K 1344 0 0 proc 45 30K 63K 78643K 4784 0 0 subproc 7 0K 2K 78643K 1368 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 1347 0 0 in_multi 36 2K 3K 78643K 1558 0 0 ether_multi 1 0K 0K 78643K 128 0 0 mrt 1 0K 0K 78643K 88 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 108 477K 477K 78643K 108 0 0 exec 0 0K 1K 78643K 2613 0 0 pfkey data 0 0K 4K 78643K 4 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 330 972K 972K 78643K 33845 0 0 UVM aobj 130 8K 8K 78643K 143 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 2K 78643K 6255 0 0 NDP 23 0K 1K 78643K 679 0 0 temp 201 3544K 4206K 78643K 496507 0 0 kqueue 0 0K 0K 78643K 129 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 64 243 0 239 1 0 1 1 0 8 0 rtpcb 80 1431 0 1431 6 6 0 1 0 8 0 rtentry 112 1467 0 1399 12 9 3 3 0 8 0 unpcb 120 18021 0 18001 48 46 2 3 0 8 0 syncache 264 65 0 65 31 31 0 1 0 8 0 tcpqe 32 146 0 146 17 17 0 1 0 8 0 tcpcb 544 9904 0 9900 63 62 1 15 0 8 0 ipq 40 186 0 186 58 58 0 1 0 8 0 ipqe 40 5028 0 5028 58 58 0 1 0 8 0 inpcb 280 28949 0 28945 80 79 1 9 0 8 0 rttmr 72 32 0 32 23 23 0 1 0 8 0 ip6q 72 7 0 7 5 5 0 1 0 8 0 ip6af 40 19 0 19 5 5 0 1 0 8 0 nd6 48 208 0 207 13 12 1 1 0 8 0 pkpcb 40 49 0 49 24 24 0 1 0 8 0 swfcl 56 1 0 0 1 0 1 1 0 8 0 ppxss 1128 208 0 208 68 68 0 1 0 8 0 art_heap8 4096 16 0 11 13 8 5 7 0 8 0 art_heap4 256 5605 0 5338 80 61 19 20 0 8 0 art_table 32 5621 0 5349 4 1 3 3 0 8 0 art_node 16 1457 0 1408 1 0 1 1 0 8 0 sysvmsgpl 40 52 0 42 1 0 1 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 141 0 13 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 20338 0 18906 50 3 47 47 0 8 0 ffsino 240 20338 0 18906 85 0 85 85 0 8 0 nchpl 144 39368 0 38873 65 41 24 62 0 8 0 uvmvnodes 72 8702 0 0 159 0 159 159 0 8 0 vnodes 208 8702 0 0 458 0 458 458 0 8 0 namei 1024 140875 0 140875 7 7 0 1 0 8 0 vcpupl 1984 116 0 0 15 0 15 15 0 8 0 vmpool 520 170 0 54 10 2 8 8 0 8 0 scsiplug 64 17 0 17 11 11 0 1 0 8 0 scxspl 192 143336 0 143336 59 58 1 7 0 8 1 plimitpl 152 1189 0 1182 1 0 1 1 0 8 0 sigapl 432 12075 0 12066 2 0 2 2 0 8 0 futexpl 56 439883 0 439883 7 7 0 1 0 8 0 knotepl 112 3296 0 3277 17 16 1 3 0 8 0 kqueuepl 104 4117 0 4115 10 9 1 4 0 8 0 pipepl 112 23988 0 23973 65 64 1 3 0 8 0 fdescpl 424 12076 0 12066 2 0 2 2 0 8 0 filepl 120 142344 0 142290 109 106 3 11 0 8 0 lockfpl 104 4647 0 4647 2 2 0 1 0 8 0 lockfspl 48 1512 0 1512 2 2 0 1 0 8 0 sessionpl 112 98 0 90 1 0 1 1 0 8 0 pgrppl 48 201 0 193 1 0 1 1 0 8 0 ucredpl 96 13478 0 13472 1 0 1 1 0 8 0 zombiepl 144 12080 0 12076 2 1 1 1 0 8 0 processpl 864 12105 0 12076 4 0 4 4 0 8 0 procpl 632 28855 0 28817 32 28 4 5 0 8 0 sosppl 128 241 0 241 53 53 0 1 0 8 0 sockpl 384 48919 0 48894 167 162 5 15 0 8 0 mcl64k 65536 2349 0 2349 148 148 0 33 0 8 0 mcl16k 16384 203 0 203 67 67 0 1 0 8 0 mcl12k 12288 476 0 476 40 40 0 1 0 8 0 mcl9k 9216 193 0 193 63 63 0 1 0 8 0 mcl8k 8192 781 0 781 22 22 0 1 0 8 0 mcl4k 4096 1498 0 1497 5 4 1 1 0 8 0 mcl2k2 2112 150 0 150 58 58 0 1 0 8 0 mcl2k 2048 98965 0 98924 27 21 6 13 0 8 0 mtagpl 80 470 0 470 16 15 1 1 0 8 1 mbufpl 256 315963 0 315890 673 660 13 35 0 8 2 bufpl 256 58998 0 50298 546 1 545 545 0 8 0 anonpl 16 1587929 0 1560829 524 415 109 123 0 62 0 amapchunkpl 152 75720 0 75276 300 282 18 32 0 158 0 amappl16 192 75471 0 74151 572 502 70 87 0 8 0 amappl15 184 2213 0 2209 14 13 1 1 0 8 0 amappl14 176 2182 0 2174 1 0 1 1 0 8 0 amappl13 168 1396 0 1394 8 7 1 1 0 8 0 amappl12 160 1275 0 1275 13 13 0 1 0 8 0 amappl11 152 1778 0 1774 1 0 1 1 0 8 0 amappl10 144 2352 0 2349 1 0 1 1 0 8 0 amappl9 136 3073 0 3068 1 0 1 1 0 8 0 amappl8 128 2611 0 2532 4 1 3 3 0 8 0 amappl7 120 2643 0 2634 1 0 1 1 0 8 0 amappl6 112 1617 0 1600 1 0 1 1 0 8 0 amappl5 104 2142 0 2136 1 0 1 1 0 8 0 amappl4 96 12602 0 12567 1 0 1 1 0 8 0 amappl3 88 2098 0 2087 1 0 1 1 0 8 0 amappl2 80 93264 0 93177 3 1 2 3 0 8 0 amappl1 72 240041 0 239646 26 16 10 20 0 8 0 amappl 80 30528 0 30420 4 1 3 3 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 64 142 0 13 3 0 3 3 0 8 0 uaddrrnd 24 12246 0 12064 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12246 0 12064 2 0 2 2 0 8 0 vmmpekpl 168 103890 0 103843 3 0 3 3 0 8 0 vmmpepl 168 1511033 0 1508213 1035 892 143 170 0 357 12 vmsppl 272 12075 0 12063 11 10 1 2 0 8 0 pdppl 4096 24498 0 24350 24 5 19 19 0 8 0 pvpl 32 4186070 0 4162761 1194 876 318 334 0 265 111 pmappl 200 12245 0 12117 9 2 7 7 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 1776 0 1078 22 1 21 22 0 8 0