kernel: protection fault trap, code=0 Stopped at pfi_ifhead_RB_REMOVE+0x58: movq 0x10(%r15),%rbx ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace pfi_ifhead_RB_REMOVE(ffffffff822b4e90,ffff8000009a5200) at pfi_ifhead_RB_REMOVE+0x58 sys/net/pf_if.c:80 pfi_detach_ifnet(ffff8000009a7800) at pfi_detach_ifnet+0x11e pfi_kif_unref sys/net/pf_if.c:199 [inline] pfi_detach_ifnet(ffff8000009a7800) at pfi_detach_ifnet+0x11e sys/net/pf_if.c:257 if_detach(ffff8000009a7800) at if_detach+0x15d sys/net/if.c:1120 tun_clone_destroy(ffff8000009a7800) at tun_clone_destroy+0x1c6 sys/net/if_tun.c:278 spec_close(ffff800016bfc388) at spec_close+0x3b0 sys/kern/spec_vnops.c:553 VOP_CLOSE(fffffd803bf31068,3,fffffd803f7c6840,ffff800014901c38) at VOP_CLOSE+0x64 sys/kern/vfs_vops.c:174 vn_closefile(fffffd802fb36f10,ffff800014901c38) at vn_closefile+0x14b vn_close sys/kern/vfs_vnops.c:289 [inline] vn_closefile(fffffd802fb36f10,ffff800014901c38) at vn_closefile+0x14b sys/kern/vfs_vnops.c:575 fdrop(fffffd802fb36f10,ffff800014901c38) at fdrop+0xc9 sys/kern/kern_descrip.c:1260 closef(fffffd802fb36f10,ffff800014901c38) at closef+0x118 sys/kern/kern_descrip.c:1244 fdfree(ffff800014901c38) at fdfree+0xf7 sys/kern/kern_descrip.c:1176 exit1(ffff800014901c38,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff800014901c38,ffff800016bfc620,ffff800016bfc690) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800016bfc6f0) at syscall+0x508 Xsyscall(6,1,0,1,0,7f7fffff6804) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff67d0, count: -14 ddb> show registers rdi 0xffffffff822b4e90 pfi_ifs rsi 0xffff8000009a5200 rbp 0xffff800016bfc210 rbx 0xdeafbeaddeafbead rdx 0x28 rcx 0xa93bf5b8e1fd52a3 rax 0xffff8000009a5210 r8 0x101010101010101 r9 0x5 r10 0x1545f44daddedf0d r11 0x13ea7b0e2607bf2e r12 0xffffffff822b4e90 pfi_ifs r13 0 r14 0xffff8000009a5200 r15 0xdeafbeaddeafbead rip 0xffffffff817c4988 pfi_ifhead_RB_REMOVE+0x58 cs 0x8 rflags 0x10282 __ALIGN_SIZE+0xf282 rsp 0xffff800016bfc1b0 ss 0x10 pfi_ifhead_RB_REMOVE+0x58: movq 0x10(%r15),%rbx ddb> show proc PROC (syz-executor.1) pid=154888 stat=onproc flags process=1008 proc=2000 pri=50, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff8000149019c8,0xffffffff822ac008 process=0xffff8000ffffb0a0 user=0xffff800016bf7000, vmspace=0xfffffd803f00baa0 estcpu=17, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 73594 466892 0 0 3 0x14200 bored sosplice 62697 296000 94320 0 3 0x2 biowait syz-executor.0 18726 110388 94320 0 3 0x82 nanosleep syz-executor.1 94320 262387 59089 0 3 0x82 thrsleep syz-fuzzer 94320 137073 59089 0 3 0x4000082 thrsleep syz-fuzzer 94320 156834 59089 0 3 0x4000082 thrsleep syz-fuzzer 94320 177450 59089 0 3 0x4000082 kqread syz-fuzzer 94320 210721 59089 0 3 0x4000082 thrsleep syz-fuzzer 94320 159386 59089 0 3 0x4000082 thrsleep syz-fuzzer 94320 482968 59089 0 3 0x4000082 thrsleep syz-fuzzer 59089 211521 92509 0 3 0x10008a pause ksh 92509 416327 42422 0 3 0x92 select sshd 19588 259793 1 0 3 0x100083 ttyin getty 42422 178753 1 0 3 0x80 select sshd 97104 190799 13582 73 3 0x100090 kqread syslogd 13582 361386 1 0 3 0x100082 netio syslogd 24659 495371 1 77 3 0x100090 poll dhclient 10057 108176 1 0 3 0x80 poll dhclient 64702 27149 0 0 2 0x14200 zerothread 5237 128214 0 0 3 0x14200 aiodoned aiodoned 96287 177456 0 0 3 0x14200 syncer update 30975 450576 0 0 3 0x14200 cleaner cleaner 38681 238718 0 0 3 0x14200 reaper reaper 84813 36808 0 0 3 0x14200 pgdaemon pagedaemon 13418 463972 0 0 3 0x14200 bored crynlk 92469 19020 0 0 3 0x14200 bored crypto 15473 300086 0 0 3 0x40014200 acpi0 acpi0 76070 379013 0 0 2 0x14200 softnet 11986 115635 0 0 3 0x14200 bored systqmp 27652 22775 0 0 3 0x14200 bored systq 11210 199742 0 0 3 0x40014200 bored softclock 46296 88806 0 0 3 0x40014200 idle0 21929 295994 0 0 3 0x14200 bored smr 1 309755 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 9450 6317K 6697K 78643K 10722 0 0 pcb 23 9K 10K 78643K 103 0 0 rtable 108 3K 4K 78643K 210 0 0 ifaddr 41 10K 11K 78643K 46 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 17 0 0 iov 0 0K 12K 78643K 10 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1210 76K 76K 78643K 1264 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 5 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 8 0K 0K 78643K 8 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 5 13K 25K 78643K 102 0 0 proc 42 30K 54K 78643K 289 0 0 subproc 32 2K 2K 78643K 34 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 13 0 0 in_multi 33 2K 2K 78643K 36 0 0 ether_multi 1 0K 0K 78643K 2 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 30 132K 132K 78643K 30 0 0 exec 0 0K 1K 78643K 182 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 77 20K 20K 78643K 1037 0 0 UVM aobj 7 2K 2K 78643K 7 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 4 0 0 NDP 7 0K 0K 78643K 12 0 0 temp 93 2704K 2768K 78643K 3247 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 6 0 0 1 0 1 1 0 8 0 inpcbpl 280 62 0 55 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 10 0 10 1 0 1 1 0 8 1 tcpcb 544 20 0 16 1 0 1 1 0 8 0 nd6 48 6 0 0 1 0 1 1 0 8 0 ppxss 1128 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 semapl 112 6 0 0 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1542 0 128 46 0 46 46 0 8 0 ffsino 240 1542 0 128 84 0 84 84 0 8 0 nchpl 144 1859 0 226 61 0 61 61 0 8 0 uvmvnodes 72 1623 0 0 30 0 30 30 0 8 0 vnodes 200 1623 0 0 86 0 86 86 0 8 0 namei 1024 4538 0 4537 2 1 1 1 0 8 0 scxspl 192 4760 0 4759 9 7 2 6 0 8 1 plimitpl 152 16 0 9 1 0 1 1 0 8 0 sigapl 432 273 0 260 2 0 2 2 0 8 0 futexpl 56 1091 0 1091 1 0 1 1 0 8 1 knotepl 112 68 0 49 1 0 1 1 0 8 0 kqueuepl 104 14 0 12 1 0 1 1 0 8 0 pipepl 112 174 0 155 2 1 1 1 0 8 0 fdescpl 424 274 0 260 2 0 2 2 0 8 0 filepl 120 1279 0 1184 4 0 4 4 0 8 1 lockfpl 104 20 0 20 2 1 1 1 0 8 1 lockfspl 48 8 0 8 2 1 1 1 0 8 1 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 68 0 61 1 0 1 1 0 8 0 zombiepl 144 261 0 260 2 1 1 1 0 8 0 processpl 848 289 0 260 4 0 4 4 0 8 0 procpl 624 373 0 338 4 0 4 4 0 8 1 sockpl 384 142 0 125 3 0 3 3 0 8 1 mcl64k 65536 2 0 2 1 0 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 1 0 1 1 0 1 1 0 8 1 mcl4k 4096 10 0 10 2 1 1 1 0 8 1 mcl2k 2048 51615 0 51569 15 3 12 12 0 8 5 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 81237 0 81175 13 4 9 9 0 8 3 bufpl 256 5742 0 1266 280 0 280 280 0 8 0 anonpl 16 34876 0 24493 45 1 44 44 0 62 1 amapchunkpl 152 1134 0 1049 6 0 6 6 0 158 2 amappl16 192 968 0 397 30 0 30 30 0 8 1 amappl14 176 75 0 72 2 1 1 1 0 8 0 amappl13 168 10 0 9 2 1 1 1 0 8 0 amappl12 160 11 0 7 1 0 1 1 0 8 0 amappl11 152 48 0 34 1 0 1 1 0 8 0 amappl10 144 62 0 61 2 1 1 1 0 8 0 amappl9 136 534 0 530 1 0 1 1 0 8 0 amappl8 128 159 0 145 1 0 1 1 0 8 0 amappl7 120 33 0 29 1 0 1 1 0 8 0 amappl6 112 54 0 47 1 0 1 1 0 8 0 amappl5 104 220 0 211 1 0 1 1 0 8 0 amappl4 96 399 0 378 1 0 1 1 0 8 0 amappl3 88 209 0 198 1 0 1 1 0 8 0 amappl2 80 1404 0 1337 4 1 3 3 0 8 1 amappl1 72 14266 0 13854 24 9 15 19 0 8 6 amappl 80 598 0 565 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 274 0 260 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 274 0 260 1 0 1 1 0 8 0 vmmpekpl 168 6006 0 5977 2 0 2 2 0 8 0 vmmpepl 168 38685 0 37097 101 14 87 87 0 357 17 vmsppl 272 273 0 260 2 0 2 2 0 8 1 pdppl 4096 555 0 520 6 0 6 6 0 8 1 pvpl 32 126886 0 113535 119 5 114 114 0 265 4 pmappl 200 273 0 260 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 430 0 11 12 0 12 12 0 8 0