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(ffffffff822d4620,ffff8000009ee800) at pfi_ifhead_RB_REMOVE+0x58 sys/net/pf_if.c:80 pfi_detach_ifnet(ffff8000009ef800) at pfi_detach_ifnet+0x11e pfi_kif_unref sys/net/pf_if.c:199 [inline] pfi_detach_ifnet(ffff8000009ef800) at pfi_detach_ifnet+0x11e sys/net/pf_if.c:257 if_detach(ffff8000009ef800) at if_detach+0x15d sys/net/if.c:1120 tun_clone_destroy(ffff8000009ef800) at tun_clone_destroy+0x1c6 sys/net/if_tun.c:278 spec_close(ffff800016bfa028) at spec_close+0x3b0 sys/kern/spec_vnops.c:553 VOP_CLOSE(fffffd803cac8330,2,fffffd803f7c68a0,ffff800014970600) at VOP_CLOSE+0x64 sys/kern/vfs_vops.c:174 vn_closefile(fffffd802fd1de98,ffff800014970600) at vn_closefile+0x14b vn_close sys/kern/vfs_vnops.c:289 [inline] vn_closefile(fffffd802fd1de98,ffff800014970600) at vn_closefile+0x14b sys/kern/vfs_vnops.c:575 fdrop(fffffd802fd1de98,ffff800014970600) at fdrop+0xc9 sys/kern/kern_descrip.c:1260 closef(fffffd802fd1de98,ffff800014970600) at closef+0x118 sys/kern/kern_descrip.c:1244 fdfree(ffff800014970600) at fdfree+0xf7 sys/kern/kern_descrip.c:1176 exit1(ffff800014970600,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff800014970600,ffff800016bfa2c0,ffff800016bfa330) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800016bfa390) at syscall+0x508 Xsyscall(6,1,0,1,0,7f7ffffda034) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffda000, count: -14 ddb> show registers rdi 0xffffffff822d4620 pfi_ifs rsi 0xffff8000009ee800 rbp 0xffff800016bf9eb0 rbx 0xdead4110dead4110 rdx 0x28 rcx 0x566e4115a2c74cd6 rax 0xffff8000009ee810 r8 0x101010101010101 r9 0x5 r10 0xf05f8a85be49b149 r11 0x432e5bf7a025c46b r12 0xffffffff822d4620 pfi_ifs r13 0 r14 0xffff8000009ee800 r15 0xdead4110dead4110 rip 0xffffffff81f06808 pfi_ifhead_RB_REMOVE+0x58 cs 0x8 rflags 0x10282 __ALIGN_SIZE+0xf282 rsp 0xffff800016bf9e50 ss 0x10 pfi_ifhead_RB_REMOVE+0x58: movq 0x10(%r15),%rbx ddb> show proc PROC (syz-executor.0) pid=242939 stat=onproc flags process=1008 proc=2000 pri=50, usrpri=72, nice=20 forw=0xffffffffffffffff, list=0xffff80001496f280,0xffffffff822b7b60 process=0xffff8000ffffba90 user=0xffff800016bf5000, vmspace=0xfffffd803f014cc0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 30314 289880 0 0 3 0x14200 bored sosplice 59107 425223 55264 0 3 0x82 nanosleep syz-executor.0 67770 412986 55264 0 3 0x2 biowait syz-executor.1 55264 253471 50359 0 3 0x82 thrsleep syz-fuzzer 55264 80355 50359 0 3 0x4000082 thrsleep syz-fuzzer 55264 312088 50359 0 3 0x4000082 thrsleep syz-fuzzer 55264 291499 50359 0 3 0x4000082 thrsleep syz-fuzzer 55264 58626 50359 0 3 0x4000082 thrsleep syz-fuzzer 55264 478555 50359 0 3 0x4000082 kqread syz-fuzzer 55264 435534 50359 0 3 0x4000082 thrsleep syz-fuzzer 50359 157198 71158 0 3 0x10008a pause ksh 71158 14493 91094 0 3 0x92 select sshd 11843 136654 1 0 3 0x100083 ttyopn getty 91094 232945 1 0 3 0x80 select sshd 12125 67098 2929 73 3 0x100090 kqread syslogd 2929 399679 1 0 3 0x100082 netio syslogd 73116 452151 1 77 3 0x100090 poll dhclient 5263 68157 1 0 3 0x80 poll dhclient 32246 48664 0 0 2 0x14200 zerothread 20484 224199 0 0 3 0x14200 aiodoned aiodoned 64336 118748 0 0 3 0x14200 syncer update 20696 487161 0 0 3 0x14200 cleaner cleaner 45168 458122 0 0 3 0x14200 reaper reaper 34071 321420 0 0 3 0x14200 pgdaemon pagedaemon 42864 321067 0 0 3 0x14200 bored crynlk 60058 263445 0 0 3 0x14200 bored crypto 26512 210171 0 0 3 0x40014200 acpi0 acpi0 5454 292336 0 0 2 0x14200 softnet 55607 240202 0 0 3 0x14200 bored systqmp 22991 333058 0 0 3 0x14200 bored systq 12363 272751 0 0 3 0x40014200 bored softclock 15207 520069 0 0 3 0x40014200 idle0 41204 456938 0 0 3 0x14200 bored smr 1 391875 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 9487 6340K 6732K 78643K 11609 0 0 pcb 23 9K 10K 78643K 258 0 0 rtable 108 3K 4K 78643K 263 0 0 ifaddr 53 12K 12K 78643K 79 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 23 0 0 iov 0 0K 16K 78643K 63 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1211 76K 76K 78643K 1570 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 6 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 11 1K 1K 78643K 11 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 5 13K 25K 78643K 407 0 0 sigio 0 0K 0K 78643K 4 0 0 proc 41 30K 54K 78643K 335 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 26 0 0 in_multi 33 2K 2K 78643K 43 0 0 ether_multi 1 0K 0K 78643K 5 0 0 mrt 0 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 54 238K 238K 78643K 54 0 0 exec 0 0K 1K 78643K 209 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 82 20K 29K 78643K 1761 0 0 UVM aobj 14 2K 2K 78643K 14 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 16 0 0 NDP 11 0K 0K 78643K 21 0 0 temp 146 2711K 2778K 78643K 4228 0 0 kqueue 0 0K 0K 78643K 4 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 280 157 0 150 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 32 147 0 147 1 1 0 1 0 8 0 tcpcb 544 48 0 44 1 0 1 1 0 8 0 nd6 48 6 0 0 1 0 1 1 0 8 0 swfcl 56 1 0 0 1 0 1 1 0 8 0 ppxss 1128 7 0 7 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 sysvmsgpl 40 6 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 12 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2058 0 640 46 0 46 46 0 8 0 ffsino 240 2058 0 640 84 0 84 84 0 8 0 nchpl 144 2800 0 1163 61 0 61 61 0 8 0 uvmvnodes 72 2324 0 0 43 0 43 43 0 8 0 vnodes 200 2324 0 0 123 0 123 123 0 8 0 namei 1024 7793 0 7792 2 1 1 1 0 8 0 scsiplug 64 2 0 2 1 1 0 1 0 8 0 scxspl 192 7361 0 7360 10 9 1 6 0 8 0 plimitpl 152 31 0 24 1 0 1 1 0 8 0 sigapl 432 578 0 565 2 0 2 2 0 8 0 futexpl 56 6103 0 6103 1 0 1 1 0 8 1 knotepl 112 95 0 76 1 0 1 1 0 8 0 kqueuepl 104 66 0 64 1 0 1 1 0 8 0 pipepl 112 372 0 353 2 1 1 1 0 8 0 fdescpl 424 579 0 565 2 0 2 2 0 8 0 filepl 120 3329 0 3234 4 0 4 4 0 8 1 lockfpl 104 120 0 120 2 1 1 1 0 8 1 lockfspl 48 43 0 43 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 96 697 0 690 1 0 1 1 0 8 0 zombiepl 144 566 0 565 2 1 1 1 0 8 0 processpl 848 594 0 565 4 0 4 4 0 8 0 procpl 624 1082 0 1047 4 0 4 4 0 8 1 sosppl 128 7 0 7 2 1 1 1 0 8 1 sockpl 384 371 0 354 3 0 3 3 0 8 1 mcl64k 65536 19 0 19 2 1 1 1 0 8 1 mcl16k 16384 2 0 2 2 2 0 1 0 8 0 mcl12k 12288 4 0 4 1 1 0 1 0 8 0 mcl9k 9216 9 0 9 1 0 1 1 0 8 1 mcl8k 8192 6 0 6 1 1 0 1 0 8 0 mcl4k 4096 22 0 22 2 1 1 1 0 8 1 mcl2k2 2112 4 0 4 2 2 0 1 0 8 0 mcl2k 2048 52463 0 52415 18 11 7 16 0 8 0 mtagpl 80 4 0 2 2 1 1 1 0 8 0 mbufpl 256 84297 0 84229 13 6 7 10 0 8 1 bufpl 256 6339 0 1861 280 0 280 280 0 8 0 anonpl 16 64524 0 53763 70 12 58 61 0 62 14 amapchunkpl 152 2336 0 2236 10 1 9 9 0 158 5 amappl16 192 2828 0 2232 53 18 35 43 0 8 5 amappl14 176 34 0 33 2 1 1 1 0 8 0 amappl13 168 186 0 183 1 0 1 1 0 8 0 amappl12 160 200 0 197 1 0 1 1 0 8 0 amappl11 152 54 0 40 1 0 1 1 0 8 0 amappl10 144 70 0 68 2 1 1 1 0 8 0 amappl9 136 539 0 536 1 0 1 1 0 8 0 amappl8 128 124 0 111 1 0 1 1 0 8 0 amappl7 120 29 0 26 1 0 1 1 0 8 0 amappl6 112 53 0 46 1 0 1 1 0 8 0 amappl5 104 340 0 330 1 0 1 1 0 8 0 amappl4 96 702 0 681 1 0 1 1 0 8 0 amappl3 88 186 0 176 1 0 1 1 0 8 0 amappl2 80 4029 0 3961 4 2 2 3 0 8 0 amappl1 72 19364 0 18957 23 13 10 19 0 8 0 amappl 80 1311 0 1277 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 13 0 0 1 0 1 1 0 8 0 uaddrrnd 24 579 0 565 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 579 0 565 1 0 1 1 0 8 0 vmmpekpl 168 7610 0 7580 2 0 2 2 0 8 0 vmmpepl 168 73710 0 72108 112 28 84 87 0 357 14 vmsppl 272 578 0 565 2 1 1 2 0 8 0 pdppl 4096 1164 0 1130 6 1 5 6 0 8 0 pvpl 32 195087 0 181326 161 14 147 150 0 265 35 pmappl 200 578 0 565 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 435 0 27 13 0 13 13 0 8 0