uvm_fault(0xfffffd803f014220, 0xefbacabe, 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(0xfffffd803f014220, 0xefbacabe, 0, 1) -> e in6_purgeaddr(ffff800000a84d00) at in6_purgeaddr+0x135 sys/netinet6/in6.c:914 end trace frame: 0xffff800017971140, count: 0 ddb> trace in6_purgeaddr(ffff800000a84d00) at in6_purgeaddr+0x135 sys/netinet6/in6.c:914 in6_ifdetach(ffff800000a85000) at in6_ifdetach+0x74 sys/netinet6/in6_ifattach.c:422 if_detach(ffff800000a85000) at if_detach+0x185 sys/net/if.c:1127 tun_clone_destroy(ffff800000a85000) at tun_clone_destroy+0x1c0 sys/net/if_tun.c:278 spec_close(ffff800017971270) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd8036a80410,7,fffffd803f7c6ae0,ffff8000ffff2780) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd802d7ee088,ffff8000ffff2780) at vn_closefile+0xd3 vn_close sys/kern/vfs_vnops.c:301 [inline] vn_closefile(fffffd802d7ee088,ffff8000ffff2780) at vn_closefile+0xd3 sys/kern/vfs_vnops.c:613 fdrop(fffffd802d7ee088,ffff8000ffff2780) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802d7ee088,ffff8000ffff2780) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff2780) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff2780,19,1) at exit1+0x32f sys/kern/kern_exit.c:196 postsig(ffff8000ffff2780,19) at postsig+0x4a6 sigexit sys/kern/kern_sig.c:1499 [inline] postsig(ffff8000ffff2780,19) at postsig+0x4a6 sys/kern/kern_sig.c:1431 userret(ffff8000ffff2780) at userret+0x159 sys/kern/kern_sig.c:1889 Xsyscall(6,3,7f7ffffc3300,5,0,153598dd000) at Xsyscall+0x156 end of kernel end trace frame: 0x7f7ffffc2e00, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000179710d0 rbx 0 rdx 0 rcx 0xfffffd8030414700 rax 0 r8 0xffff800000a87f00 r9 0x1 r10 0x2a4654bc93ed43dd r11 0xe632bb60eeadca6f r12 0xefbacab6 r13 0 r14 0xffff800000a84d00 r15 0xffff800000a85000 rip 0xffffffff81f7e105 in6_purgeaddr+0x135 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800017971060 ss 0x10 in6_purgeaddr+0x135: movq 0x8(%r12),%r13 ddb> show proc PROC (syz-executor.0) pid=21384 stat=onproc flags process=a proc=2000 pri=17, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2ee8,0xffff8000ffff33e8 process=0xffff8000ffff77b0 user=0xffff80001796c000, vmspace=0xfffffd803f014220 estcpu=36, cpticks=1, pctcpu=0.2 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 26282 263097 59761 0 2 0 syz-executor.1 26282 173563 59761 0 2 0x4000000 syz-executor.1 59761 113950 76003 0 2 0x482 syz-executor.1 61548 382763 1 0 3 0x100083 ttyin getty 48639 324927 0 0 3 0x14200 bored sosplice 76003 251460 61660 0 3 0x82 thrsleep syz-fuzzer 76003 399551 61660 0 3 0x4000082 nanosleep syz-fuzzer 76003 217818 61660 0 3 0x4000082 thrsleep syz-fuzzer 76003 388168 61660 0 3 0x4000082 thrsleep syz-fuzzer 76003 444201 61660 0 2 0x4000082 syz-fuzzer 76003 233074 61660 0 3 0x4000082 thrsleep syz-fuzzer 76003 10614 61660 0 3 0x4000082 thrsleep syz-fuzzer 76003 261837 61660 0 3 0x4000082 thrsleep syz-fuzzer 76003 332740 61660 0 3 0x4000082 thrsleep syz-fuzzer 61660 392215 89375 0 3 0x10008a pause ksh 89375 187105 24347 0 3 0x92 select sshd 24347 129498 1 0 3 0x80 select sshd 82497 148911 85698 73 3 0x100090 kqread syslogd 85698 232037 1 0 3 0x100082 netio syslogd 45835 447373 0 0 2 0x14200 zerothread 49964 262890 0 0 3 0x14200 aiodoned aiodoned 20216 352585 0 0 3 0x14200 syncer update 17423 341298 0 0 3 0x14200 cleaner cleaner 13174 293033 0 0 3 0x14200 reaper reaper 36770 258804 0 0 3 0x14200 pgdaemon pagedaemon 82714 441430 0 0 3 0x14200 bored crynlk 13241 289786 0 0 3 0x14200 bored crypto 68995 278724 0 0 3 0x40014200 acpi0 acpi0 57450 351766 0 0 2 0x14200 softnet 5476 185495 0 0 2 0x14200 systqmp 20376 174146 0 0 3 0x14200 bored systq 23445 18033 0 0 3 0x40014200 bored softclock 88004 352492 0 0 3 0x40014200 idle0 40491 140771 0 0 3 0x14200 bored smr 1 374370 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 9502 6272K 7488K 78643K 12238 0 0 pcb 13 8K 8K 78643K 142 0 0 rtable 75 11K 12K 78643K 521 0 0 ifaddr 56 12K 13K 78643K 178 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 51 0 0 iov 0 0K 28K 78643K 178 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1229 77K 77K 78643K 1820 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 14 0 0 VM map 4 1K 1K 78643K 6 0 0 sem 12 0K 0K 78643K 298 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 5 13K 25K 78643K 669 0 0 sigio 0 0K 0K 78643K 16 0 0 proc 43 30K 54K 78643K 632 0 0 subproc 23 1K 2K 78643K 119 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 69 0 0 in_multi 12 0K 2K 78643K 138 0 0 ether_multi 1 0K 0K 78643K 9 0 0 mrt 0 0K 0K 78643K 5 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 48 212K 212K 78643K 48 0 0 exec 0 0K 1K 78643K 335 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 112 38K 47K 78643K 2556 0 0 UVM aobj 91 7K 7K 78643K 97 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 146 0 0 NDP 13 0K 0K 78643K 59 0 0 temp 165 3541K 3635K 78643K 45056 0 0 kqueue 0 0K 0K 78643K 20 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 27 0 24 1 0 1 1 0 8 0 rtpcb 80 105 0 105 1 0 1 1 0 8 1 rtentry 112 141 0 115 2 0 2 2 0 8 0 unpcb 120 297 0 291 1 0 1 1 0 8 0 syncache 264 12 0 12 3 2 1 1 0 8 1 tcpqe 32 201 0 201 3 2 1 1 0 8 1 tcpcb 544 1257 0 1253 6 4 2 2 0 8 1 ipq 40 4 0 4 2 2 0 1 0 8 0 ipqe 40 95 0 95 2 2 0 1 0 8 0 inpcb 280 2699 0 2695 6 4 2 4 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 21 0 20 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 2 0 1 0 8 0 swfcl 56 4 0 0 1 0 1 1 0 8 0 ppxss 1128 12 0 12 3 2 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 637 0 451 17 3 14 15 0 8 0 art_table 32 638 0 451 2 0 2 2 0 8 0 art_node 16 140 0 111 1 0 1 1 0 8 0 sysvmsgpl 40 36 0 17 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 296 0 286 1 0 1 1 0 8 0 shmpl 112 95 0 6 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2370 0 974 46 0 46 46 0 8 0 ffsino 240 2370 0 974 83 0 83 83 0 8 0 nchpl 144 3540 0 3099 60 40 20 60 0 8 0 uvmvnodes 72 2866 0 0 53 0 53 53 0 8 0 vnodes 208 2866 0 0 151 0 151 151 0 8 0 namei 1024 10744 0 10744 1 0 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 520 4 0 2 1 0 1 1 0 8 0 scxspl 192 11052 0 11052 11 10 1 7 0 8 1 plimitpl 152 75 0 69 1 0 1 1 0 8 0 sigapl 432 825 0 814 2 0 2 2 0 8 0 futexpl 56 20836 0 20836 1 0 1 1 0 8 1 knotepl 112 256 0 237 1 0 1 1 0 8 0 kqueuepl 104 207 0 204 1 0 1 1 0 8 0 pipepl 112 670 0 652 4 2 2 2 0 8 1 fdescpl 424 826 0 814 2 0 2 2 0 8 0 filepl 120 7789 0 7714 9 4 5 5 0 8 2 lockfpl 104 213 0 213 1 0 1 1 0 8 1 lockfspl 48 69 0 69 1 0 1 1 0 8 1 sessionpl 112 23 0 15 1 0 1 1 0 8 0 pgrppl 48 27 0 19 1 0 1 1 0 8 0 ucredpl 96 620 0 613 1 0 1 1 0 8 0 zombiepl 144 815 0 814 1 0 1 1 0 8 0 processpl 864 841 0 814 4 0 4 4 0 8 0 procpl 632 1608 0 1572 4 0 4 4 0 8 0 sosppl 128 15 0 15 3 2 1 1 0 8 1 sockpl 384 3126 0 3116 11 7 4 7 0 8 2 mcl64k 65536 287 0 287 31 24 7 29 0 8 7 mcl16k 16384 5 0 5 4 3 1 1 0 8 1 mcl12k 12288 18 0 18 2 1 1 1 0 8 1 mcl9k 9216 17 0 17 2 1 1 1 0 8 1 mcl8k 8192 36 0 36 2 1 1 1 0 8 1 mcl4k 4096 97 0 97 2 1 1 1 0 8 1 mcl2k2 2112 6 0 6 2 2 0 1 0 8 0 mcl2k 2048 68929 0 68883 18 11 7 15 0 8 0 mtagpl 80 31 0 31 3 2 1 1 0 8 1 mbufpl 256 115453 0 115385 43 27 16 25 0 8 8 bufpl 256 9106 0 3098 376 0 376 376 0 8 0 anonpl 16 124090 0 104595 102 21 81 95 0 62 0 amapchunkpl 152 4917 0 4774 17 10 7 16 0 158 0 amappl16 192 4854 0 3749 84 25 59 68 0 8 2 amappl15 184 145 0 144 2 1 1 1 0 8 0 amappl14 176 97 0 92 1 0 1 1 0 8 0 amappl13 168 206 0 206 1 1 0 1 0 8 0 amappl12 160 27 0 25 2 1 1 1 0 8 0 amappl11 152 67 0 63 1 0 1 1 0 8 0 amappl10 144 278 0 273 1 0 1 1 0 8 0 amappl9 136 616 0 613 1 0 1 1 0 8 0 amappl8 128 217 0 185 3 1 2 2 0 8 0 amappl7 120 321 0 312 1 0 1 1 0 8 0 amappl6 112 54 0 46 1 0 1 1 0 8 0 amappl5 104 193 0 185 1 0 1 1 0 8 0 amappl4 96 1061 0 1034 1 0 1 1 0 8 0 amappl3 88 164 0 158 1 0 1 1 0 8 0 amappl2 80 5798 0 5739 3 1 2 3 0 8 0 amappl1 72 24827 0 24443 25 16 9 20 0 8 0 amappl 80 1914 0 1874 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 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 96 0 6 2 0 2 2 0 8 0 uaddrrnd 24 830 0 814 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 830 0 814 1 0 1 1 0 8 0 vmmpekpl 168 9833 0 9808 2 0 2 2 0 8 0 vmmpepl 168 110616 0 108517 158 26 132 138 0 357 35 vmsppl 272 825 0 814 2 1 1 2 0 8 0 pdppl 4096 1666 0 1634 6 1 5 6 0 8 0 pvpl 32 360264 0 337727 269 26 243 262 0 265 59 pmappl 200 829 0 816 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 597 0 78 17 1 16 16 0 8 0