kernel: protection fault trap, code=0 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace in_delmulti(bfffbfffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff8000009f6400) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff8000009f5000) at in_ifdetach+0x74 sys/netinet/in.c:969 if_detach(ffff8000009f5000) at if_detach+0x140 sys/net/if.c:1151 tun_clone_destroy(ffff8000009f5000) at tun_clone_destroy+0x172 sys/net/if_tun.c:312 spec_close(ffff800014930550) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd803a6d0ea0,7,fffffd803f7c6b40,ffff8000ffff2780) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd802d4e0bc8,ffff8000ffff2780) at vn_closefile+0xd3 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd802d4e0bc8,ffff8000ffff2780) at vn_closefile+0xd3 sys/kern/vfs_vnops.c:610 fdrop(fffffd802d4e0bc8,ffff8000ffff2780) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802d4e0bc8,ffff8000ffff2780) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff2780) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff2780,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff8000ffff2780,ffff8000149307e0,ffff800014930830) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff8000149308b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffeb970, count: -15 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff800014930380 rbx 0 rdx 0x3 rcx 0x1 rax 0 r8 0xffff8000009f6400 r9 0x5 r10 0x7630d50ddb13e86a r11 0x155fc888a175e5d2 r12 0 r13 0x3 r14 0xbfffbfffffffffff r15 0x1 rip 0xffffffff8152520d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800014930320 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.1) pid=365883 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff29f8,0xffffffff825654b8 process=0xffff8000ffff6a30 user=0xffff80001492b000, vmspace=0xfffffd802d4cb998 estcpu=27, cpticks=16, pctcpu=0.10 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 54025 421844 80187 0 3 0x82 piperd syz-executor.0 87169 435812 0 0 3 0x14200 bored sosplice 80187 450465 73015 0 3 0x82 thrsleep syz-fuzzer 80187 25761 73015 0 3 0x4000082 thrsleep syz-fuzzer 80187 423437 73015 0 2 0x4000082 syz-fuzzer 80187 127060 73015 0 3 0x4000082 thrsleep syz-fuzzer 80187 411896 73015 0 3 0x4000082 thrsleep syz-fuzzer 80187 439600 73015 0 3 0x4000082 thrsleep syz-fuzzer 80187 134018 73015 0 3 0x4000082 thrsleep syz-fuzzer 80187 115525 73015 0 3 0x4000082 thrsleep syz-fuzzer 73015 173842 94197 0 3 0x10008a pause ksh 94197 28725 81086 0 3 0x92 select sshd 25593 201551 1 0 3 0x100083 ttyin getty 81086 16576 1 0 3 0x80 select sshd 58324 54176 5657 73 3 0x100090 kqread syslogd 5657 59193 1 0 3 0x100082 netio syslogd 51177 507327 1 77 2 0x100090 dhclient 71 368377 1 0 3 0x80 poll dhclient 89256 147062 0 0 2 0x14200 zerothread 57105 60374 0 0 3 0x14200 aiodoned aiodoned 19810 35266 0 0 3 0x14200 syncer update 7218 523089 0 0 3 0x14200 cleaner cleaner 38838 479713 0 0 3 0x14200 reaper reaper 76032 10059 0 0 3 0x14200 pgdaemon pagedaemon 36636 459639 0 0 3 0x14200 bored crynlk 13750 112589 0 0 3 0x14200 bored crypto 47676 183164 0 0 3 0x40014200 acpi0 acpi0 86522 166746 0 0 2 0x14200 softnet 74152 429582 0 0 2 0x14200 systqmp 99247 414005 0 0 3 0x14200 bored systq 63793 472533 0 0 3 0x40014200 bored softclock 99789 385563 0 0 3 0x40014200 idle0 77630 208770 0 0 3 0x14200 bored smr 1 206223 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 devbuf 9483 6339K 6981K 78643K 11238 0 pcb 13 8K 8K 78643K 89 0 rtable 101 7K 8K 78643K 444 0 ifaddr 68 15K 17K 78643K 187 0 counters 19 16K 16K 78643K 19 0 ioctlops 0 0K 2K 78643K 34 0 iov 0 0K 32K 78643K 82 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 1418 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 9 0 VM map 2 0K 0K 78643K 2 0 sem 12 1K 1K 78643K 98 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 4 9K 25K 78643K 340 0 sigio 0 0K 0K 78643K 10 0 proc 48 38K 63K 78643K 447 0 subproc 23 1K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 26 0 in_multi 75 3K 4K 78643K 107 0 ether_multi 1 0K 0K 78643K 1 0 mrt 0 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 48 212K 212K 78643K 48 0 exec 0 0K 1K 78643K 222 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 122 38K 39K 78643K 1758 0 UVM aobj 34 2K 2K 78643K 44 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 56 0 NDP 10 0K 0K 78643K 40 0 temp 128 3018K 3084K 78643K 26096 0 kqueue 0 0K 0K 78643K 7 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 11 0 7 1 0 1 1 0 8 0 rtpcb 80 54 0 52 1 0 1 1 0 8 0 rtentry 112 73 0 34 2 0 2 2 0 8 0 unpcb 120 281 0 273 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 487 0 487 1 1 0 1 0 8 0 tcpcb 544 285 0 281 1 0 1 1 0 8 0 ipq 40 3 0 3 2 2 0 1 0 8 0 ipqe 40 49 0 49 2 2 0 1 0 8 0 inpcb 280 764 0 757 2 1 1 2 0 8 0 nd6 48 8 0 5 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 15 0 15 2 1 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 345 0 137 15 0 15 15 0 8 0 art_table 32 347 0 137 2 0 2 2 0 8 0 art_node 16 72 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 103 0 73 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 92 0 82 1 0 1 1 0 8 0 shmpl 112 42 0 10 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1903 0 502 46 0 46 46 0 8 0 ffsino 240 1903 0 502 83 0 83 83 0 8 0 nchpl 144 2587 0 2139 60 41 19 60 0 8 0 uvmvnodes 72 2091 0 0 39 0 39 39 0 8 0 vnodes 208 2091 0 0 111 0 111 111 0 8 0 namei 1024 7453 0 7453 2 1 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 528 4 0 2 1 0 1 1 0 8 0 scxspl 192 8007 0 8007 8 7 1 7 0 8 1 plimitpl 152 42 0 35 1 0 1 1 0 8 0 sigapl 432 508 0 496 2 0 2 2 0 8 0 futexpl 56 10084 0 10084 1 0 1 1 0 8 1 knotepl 112 94 0 75 1 0 1 1 0 8 0 kqueuepl 104 84 0 82 1 0 1 1 0 8 0 pipepl 128 326 0 310 2 1 1 2 0 8 0 fdescpl 424 509 0 496 2 0 2 2 0 8 0 filepl 120 3927 0 3844 5 1 4 5 0 8 1 lockfpl 104 127 0 126 1 0 1 1 0 8 0 lockfspl 48 43 0 42 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 28 0 18 1 0 1 1 0 8 0 ucredpl 96 490 0 483 1 0 1 1 0 8 0 zombiepl 144 497 0 495 2 1 1 1 0 8 0 processpl 864 524 0 495 4 0 4 4 0 8 0 procpl 632 980 0 944 5 1 4 5 0 8 0 sosppl 128 9 0 9 1 1 0 1 0 8 0 sockpl 384 1105 0 1088 6 2 4 5 0 8 2 mcl64k 65536 46 0 46 1 0 1 1 0 8 1 mcl16k 16384 3 0 3 1 0 1 1 0 8 1 mcl12k 12288 13 0 13 1 0 1 1 0 8 1 mcl9k 9216 4 0 4 2 1 1 1 0 8 1 mcl8k 8192 41 0 41 1 0 1 1 0 8 1 mcl4k 4096 56 0 56 2 1 1 1 0 8 1 mcl2k2 2112 2 0 2 2 1 1 1 0 8 1 mcl2k 2048 70430 0 70366 26 17 9 18 0 8 0 mtagpl 80 14 0 14 2 1 1 1 0 8 1 mbufpl 256 115129 0 114993 27 14 13 22 0 8 1 bufpl 280 8042 0 2853 372 0 372 372 0 8 0 anonpl 16 77375 0 57339 98 10 88 97 0 62 6 amapchunkpl 152 2593 0 2433 14 5 9 11 0 158 2 amappl16 192 3159 0 2021 76 16 60 69 0 8 2 amappl15 184 125 0 120 1 0 1 1 0 8 0 amappl14 176 185 0 182 1 0 1 1 0 8 0 amappl13 168 9 0 8 2 1 1 1 0 8 0 amappl12 160 6 0 5 2 1 1 1 0 8 0 amappl11 152 50 0 38 1 0 1 1 0 8 0 amappl10 144 10 0 7 1 0 1 1 0 8 0 amappl9 136 624 0 620 1 0 1 1 0 8 0 amappl8 128 201 0 174 1 0 1 1 0 8 0 amappl7 120 105 0 91 1 0 1 1 0 8 0 amappl6 112 52 0 47 1 0 1 1 0 8 0 amappl5 104 188 0 178 1 0 1 1 0 8 0 amappl4 96 579 0 551 1 0 1 1 0 8 0 amappl3 88 434 0 425 1 0 1 1 0 8 0 amappl2 80 3319 0 3252 3 1 2 3 0 8 0 amappl1 72 18947 0 18516 25 15 10 20 0 8 0 amappl 80 1241 0 1193 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 18 0 17 1 0 1 1 0 8 0 aobjpl 64 43 0 10 1 0 1 1 0 8 0 uaddrrnd 24 513 0 498 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 513 0 498 1 0 1 1 0 8 0 vmmpekpl 168 7518 0 7493 2 0 2 2 0 8 0 vmmpepl 168 70264 0 68071 156 22 134 141 0 357 32 vmsppl 272 512 0 498 2 0 2 2 0 8 0 pdppl 4096 1032 0 998 6 1 5 6 0 8 0 pvpl 32 218606 0 195296 220 14 206 219 0 265 17 pmappl 200 512 0 498 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 174 0 36 5 0 5 5 0 8 0