uvm_fault(0xfffffd803f014330, 0x9cb8a46, 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(0xfffffd803f014330, 0x9cb8a46, 0, 1) -> e in6_purgeaddr(ffff800000a8d900) at in6_purgeaddr+0x135 sys/netinet6/in6.c:914 end trace frame: 0xffff8000149141c0, count: 0 ddb> trace in6_purgeaddr(ffff800000a8d900) at in6_purgeaddr+0x135 sys/netinet6/in6.c:914 in6_ifdetach(ffff800000adc000) at in6_ifdetach+0x74 sys/netinet6/in6_ifattach.c:422 if_detach(ffff800000adc000) at if_detach+0x185 sys/net/if.c:1127 tun_clone_destroy(ffff800000adc000) at tun_clone_destroy+0x1c0 sys/net/if_tun.c:278 spec_close(ffff8000149142f0) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd803ea769c0,7,fffffd803f7c68a0,ffff800015934508) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd802d803e20,ffff800015934508) at vn_closefile+0xd3 vn_close sys/kern/vfs_vnops.c:301 [inline] vn_closefile(fffffd802d803e20,ffff800015934508) at vn_closefile+0xd3 sys/kern/vfs_vnops.c:613 fdrop(fffffd802d803e20,ffff800015934508) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802d803e20,ffff800015934508) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff800015934508) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff800015934508,19,1) at exit1+0x32f sys/kern/kern_exit.c:196 postsig(ffff800015934508,19) at postsig+0x4a6 sigexit sys/kern/kern_sig.c:1499 [inline] postsig(ffff800015934508,19) at postsig+0x4a6 sys/kern/kern_sig.c:1431 userret(ffff800015934508) at userret+0x159 sys/kern/kern_sig.c:1889 syscall(ffff800014914770) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:115 [inline] syscall(ffff800014914770) at syscall+0x42e sys/arch/amd64/amd64/trap.c:577 Xsyscall(6,0,7f7ffffd28b0,35,3,0) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd23b0, count: -15 ddb> show registers rdi 0 rsi 0 rbp 0xffff800014914150 rbx 0 rdx 0 rcx 0xfffffd802d600900 rax 0 r8 0xffff800000a8d200 r9 0x1 r10 0x986f2b52081c6632 r11 0xd82a845e549137d1 r12 0x9cb8a3e __kernel_end_phys+0x76b8a3e r13 0 r14 0xffff800000a8d900 r15 0xffff800000adc000 rip 0xffffffff82085775 in6_purgeaddr+0x135 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000149140e0 ss 0x10 in6_purgeaddr+0x135: movq 0x8(%r12),%r13 ddb> show proc PROC (syz-executor.0) pid=261377 stat=onproc flags process=a proc=2000 pri=17, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800015934c70,0xffff800015934028 process=0xffff8000ffff6a30 user=0xffff80001490f000, vmspace=0xfffffd803f014330 estcpu=36, cpticks=2, pctcpu=0.1 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 21166 232188 17390 0 3 0x82 nanosleep syz-executor.1 79192 313483 0 0 3 0x14200 bored sosplice 17390 350804 77725 0 3 0x82 thrsleep syz-fuzzer 17390 137930 77725 0 3 0x4000082 nanosleep syz-fuzzer 17390 347794 77725 0 3 0x4000082 thrsleep syz-fuzzer 17390 305985 77725 0 3 0x4000082 thrsleep syz-fuzzer 17390 200766 77725 0 3 0x4000082 thrsleep syz-fuzzer 17390 507632 77725 0 3 0x4000082 thrsleep syz-fuzzer 17390 491848 77725 0 3 0x4000082 thrsleep syz-fuzzer 17390 396932 77725 0 2 0x4000082 syz-fuzzer 17390 193327 77725 0 3 0x4000082 thrsleep syz-fuzzer 77725 258945 82168 0 3 0x10008a pause ksh 82168 174438 20556 0 3 0x92 select sshd 91893 357942 1 0 3 0x100083 ttyin getty 20556 405292 1 0 3 0x80 select sshd 71059 121168 1093 73 3 0x100090 kqread syslogd 1093 517490 1 0 3 0x100082 netio syslogd 82981 35127 1 77 2 0x100090 dhclient 32898 361335 1 0 3 0x80 poll dhclient 58611 430769 0 0 2 0x14200 zerothread 52625 55055 0 0 3 0x14200 aiodoned aiodoned 89801 401426 0 0 3 0x14200 syncer update 41972 298744 0 0 3 0x14200 cleaner cleaner 52011 63699 0 0 3 0x14200 reaper reaper 73224 415460 0 0 3 0x14200 pgdaemon pagedaemon 62880 30619 0 0 3 0x14200 bored crynlk 96386 250837 0 0 3 0x14200 bored crypto 33831 446139 0 0 3 0x40014200 acpi0 acpi0 69173 262225 0 0 2 0x14200 softnet 21270 173841 0 0 2 0x14200 systqmp 7154 277149 0 0 3 0x14200 bored systq 97738 62193 0 0 3 0x40014200 bored softclock 6447 85705 0 0 3 0x40014200 idle0 42195 68450 0 0 3 0x14200 bored smr 1 389765 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 9518 6355K 7368K 78643K 12988 0 0 pcb 13 11K 12K 78643K 218 0 0 rtable 98 3K 4K 78643K 855 0 0 ifaddr 68 16K 17K 78643K 280 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 76 0 0 iov 0 0K 24K 78643K 257 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1218 77K 77K 78643K 2086 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 16 0 0 VM map 14 3K 3K 78643K 18 0 0 sem 12 0K 0K 78643K 639 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 4 9K 25K 78643K 952 0 0 sigio 0 0K 0K 78643K 10 0 0 proc 48 38K 54K 78643K 704 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 102 0 0 in_multi 24 1K 2K 78643K 137 0 0 ether_multi 1 0K 0K 78643K 10 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 78 344K 344K 78643K 78 0 0 exec 0 0K 1K 78643K 369 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 131 104K 104K 78643K 3283 0 0 UVM aobj 80 6K 6K 78643K 84 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 182 0 0 NDP 14 0K 0K 78643K 85 0 0 temp 173 3543K 3636K 78643K 35076 0 0 kqueue 0 0K 0K 78643K 21 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 18 0 13 1 0 1 1 0 8 0 rtpcb 80 96 0 94 1 0 1 1 0 8 0 rtentry 112 141 0 105 2 0 2 2 0 8 0 unpcb 120 903 0 895 1 0 1 1 0 8 0 syncache 264 7 0 7 3 3 0 1 0 8 0 tcpqe 32 49 0 49 3 3 0 1 0 8 0 tcpcb 544 717 0 712 16 15 1 15 0 8 0 ipq 40 14 0 14 6 5 1 1 0 8 1 ipqe 40 548 0 548 6 5 1 1 0 8 1 inpcb 280 2002 0 1994 14 12 2 9 0 8 1 nd6 48 19 0 16 1 0 1 1 0 8 0 pkpcb 40 6 0 6 3 2 1 1 0 8 1 ppxss 1128 29 0 29 5 4 1 1 0 8 1 art_heap8 4096 5 0 4 4 3 1 3 0 8 0 art_heap4 256 627 0 390 17 2 15 15 0 8 0 art_table 32 632 0 394 2 0 2 2 0 8 0 art_node 16 140 0 101 1 0 1 1 0 8 0 sysvmsgpl 40 39 0 27 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 636 0 626 1 0 1 1 0 8 0 shmpl 112 82 0 4 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2874 0 1476 46 0 46 46 0 8 0 ffsino 240 2874 0 1476 83 0 83 83 0 8 0 nchpl 144 4514 0 4064 60 40 20 60 0 8 0 uvmvnodes 72 3553 0 0 65 0 65 65 0 8 0 vnodes 208 3553 0 0 187 0 187 187 0 8 0 namei 1024 14703 0 14703 2 1 1 1 0 8 1 vcpupl 1984 12 0 0 2 0 2 2 0 8 0 vmpool 520 16 0 4 1 0 1 1 0 8 0 scsiplug 64 3 0 3 2 2 0 1 0 8 0 scxspl 192 15907 0 15907 14 12 2 7 0 8 2 plimitpl 152 107 0 100 1 0 1 1 0 8 0 sigapl 432 1107 0 1095 2 0 2 2 0 8 0 futexpl 56 30624 0 30624 1 0 1 1 0 8 1 knotepl 112 359 0 340 3 2 1 2 0 8 0 kqueuepl 104 563 0 561 4 3 1 4 0 8 0 pipepl 112 1504 0 1486 4 3 1 2 0 8 0 fdescpl 424 1108 0 1095 2 0 2 2 0 8 0 filepl 120 10581 0 10496 14 9 5 11 0 8 2 lockfpl 104 383 0 382 1 0 1 1 0 8 0 lockfspl 48 131 0 130 1 0 1 1 0 8 0 sessionpl 112 22 0 12 1 0 1 1 0 8 0 pgrppl 48 36 0 26 1 0 1 1 0 8 0 ucredpl 96 1096 0 1089 1 0 1 1 0 8 0 zombiepl 144 1102 0 1100 1 0 1 1 0 8 0 processpl 864 1129 0 1100 4 0 4 4 0 8 0 procpl 632 2290 0 2253 4 0 4 4 0 8 0 sosppl 128 5 0 5 2 2 0 1 0 8 0 sockpl 384 3089 0 3071 18 14 4 14 0 8 2 mcl64k 65536 330 0 330 33 32 1 32 0 8 1 mcl16k 16384 12 0 12 3 3 0 1 0 8 0 mcl12k 12288 27 0 27 4 3 1 1 0 8 1 mcl9k 9216 8 0 8 4 4 0 1 0 8 0 mcl8k 8192 48 0 48 3 2 1 1 0 8 1 mcl4k 4096 110 0 110 2 1 1 1 0 8 1 mcl2k2 2112 23 0 23 4 3 1 1 0 8 1 mcl2k 2048 70250 0 70207 17 11 6 13 0 8 0 mtagpl 80 29 0 29 3 2 1 1 0 8 1 mbufpl 256 121624 0 121495 63 41 22 22 0 8 13 bufpl 256 13893 0 8050 367 0 367 367 0 8 1 anonpl 16 159637 0 143289 129 36 93 99 0 62 9 amapchunkpl 152 6545 0 6407 35 27 8 31 0 158 1 amappl16 192 7567 0 6433 108 42 66 69 0 8 8 amappl15 184 453 0 451 2 1 1 1 0 8 0 amappl14 176 76 0 71 1 0 1 1 0 8 0 amappl13 168 61 0 60 1 0 1 1 0 8 0 amappl12 160 7 0 4 1 0 1 1 0 8 0 amappl11 152 93 0 82 1 0 1 1 0 8 0 amappl10 144 52 0 51 1 0 1 1 0 8 0 amappl9 136 634 0 628 1 0 1 1 0 8 0 amappl8 128 214 0 180 2 0 2 2 0 8 0 amappl7 120 119 0 111 1 0 1 1 0 8 0 amappl6 112 91 0 80 1 0 1 1 0 8 0 amappl5 104 193 0 183 1 0 1 1 0 8 0 amappl4 96 1393 0 1363 1 0 1 1 0 8 0 amappl3 88 149 0 142 1 0 1 1 0 8 0 amappl2 80 8169 0 8108 3 1 2 3 0 8 0 amappl1 72 29778 0 29382 24 14 10 20 0 8 0 amappl 80 2625 0 2578 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 83 0 4 2 0 2 2 0 8 0 uaddrrnd 24 1124 0 1095 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1124 0 1095 1 0 1 1 0 8 0 vmmpekpl 168 12973 0 12945 2 0 2 2 0 8 0 vmmpepl 168 142732 0 140573 186 43 143 143 0 357 41 vmsppl 272 1107 0 1095 2 1 1 2 0 8 0 pdppl 4096 2254 0 2210 8 1 7 7 0 8 1 pvpl 32 405837 0 387004 252 41 211 222 0 265 22 pmappl 200 1123 0 1099 2 0 2 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 625 0 115 16 0 16 16 0 8 0