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(bffffffffff7ffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff8000009f6700) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff8000009e3800) at in_ifdetach+0x74 sys/netinet/in.c:969 if_detach(ffff8000009e3800) at if_detach+0x140 sys/net/if.c:1151 tun_clone_destroy(ffff8000009e3800) at tun_clone_destroy+0x172 sys/net/if_tun.c:312 spec_close(ffff800014938210) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd8038d5cea0,7,fffffd803f7c6ba0,ffff8000ffff84f8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd802d4af4c0,ffff8000ffff84f8) at vn_closefile+0xd3 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd802d4af4c0,ffff8000ffff84f8) at vn_closefile+0xd3 sys/kern/vfs_vnops.c:610 fdrop(fffffd802d4af4c0,ffff8000ffff84f8) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802d4af4c0,ffff8000ffff84f8) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff84f8) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff84f8,19,1) at exit1+0x32f sys/kern/kern_exit.c:196 postsig(ffff8000ffff84f8,19) at postsig+0x4a6 sigexit sys/kern/kern_sig.c:1499 [inline] postsig(ffff8000ffff84f8,19) at postsig+0x4a6 sys/kern/kern_sig.c:1431 userret(ffff8000ffff84f8) at userret+0x159 sys/kern/kern_sig.c:1889 syscall(ffff800014938690) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:115 [inline] syscall(ffff800014938690) at syscall+0x42e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc1c50, count: -16 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff800014938040 rbx 0 rdx 0x3 rcx 0x1 rax 0 r8 0xffff8000009f6700 r9 0x5 r10 0xe89854fa86448e4 r11 0x8a84903e5d614d0 r12 0 r13 0x3 r14 0xbffffffffff7ffff r15 0x1 rip 0xffffffff8152520d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800014937fe0 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.1) pid=411526 stat=onproc flags process=a proc=2000 pri=17, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8008,0xffff8000ffff8290 process=0xffff8000148b26d8 user=0xffff800014933000, vmspace=0xfffffd803f012220 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 61483 516141 95554 0 2 0 syz-executor.0 95221 271946 1 0 3 0x100083 ttyin getty 38796 483693 0 0 3 0x14200 bored sosplice 95554 265595 12358 0 3 0x82 nanosleep syz-executor.0 12358 450322 55695 0 3 0x82 thrsleep syz-fuzzer 12358 378878 55695 0 3 0x4000082 nanosleep syz-fuzzer 12358 366110 55695 0 3 0x4000082 thrsleep syz-fuzzer 12358 356296 55695 0 3 0x4000082 thrsleep syz-fuzzer 12358 282526 55695 0 3 0x4000082 thrsleep syz-fuzzer 12358 337133 55695 0 3 0x4000082 thrsleep syz-fuzzer 12358 404879 55695 0 3 0x4000082 thrsleep syz-fuzzer 12358 242391 55695 0 2 0x4000082 syz-fuzzer 55695 178350 51918 0 3 0x10008a pause ksh 51918 6096 25535 0 3 0x92 select sshd 25535 89248 1 0 3 0x80 select sshd 66960 461905 53247 73 3 0x100090 kqread syslogd 53247 426941 1 0 3 0x100082 netio syslogd 28062 158904 1 77 2 0x100090 dhclient 89226 6858 1 0 3 0x80 poll dhclient 86826 17217 0 0 2 0x14200 zerothread 13684 117865 0 0 3 0x14200 aiodoned aiodoned 86675 443585 0 0 3 0x14200 syncer update 71749 90346 0 0 3 0x14200 cleaner cleaner 52344 353839 0 0 3 0x14200 reaper reaper 52069 315255 0 0 3 0x14200 pgdaemon pagedaemon 84819 510386 0 0 3 0x14200 bored crynlk 89970 420155 0 0 3 0x14200 bored crypto 18881 28091 0 0 3 0x40014200 acpi0 acpi0 56281 62588 0 0 2 0x14200 softnet 97338 369719 0 0 3 0x14200 bored systqmp 78862 300147 0 0 3 0x14200 bored systq 70434 340724 0 0 3 0x40014200 bored softclock 83706 210643 0 0 3 0x40014200 idle0 49201 136115 0 0 3 0x14200 bored smr 1 450177 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 9505 6346K 6861K 78643K 11279 0 pcb 13 8K 8K 78643K 111 0 rtable 87 3K 4K 78643K 275 0 ifaddr 73 14K 16K 78643K 97 0 counters 19 16K 16K 78643K 19 0 ioctlops 0 0K 2K 78643K 33 0 iov 0 0K 16K 78643K 87 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 1469 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 0K 0K 78643K 2 0 sem 12 1K 1K 78643K 22 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 5 13K 25K 78643K 320 0 sigio 0 0K 0K 78643K 17 0 proc 48 38K 63K 78643K 401 0 subproc 23 1K 2K 78643K 38 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 21 0 in_multi 64 3K 3K 78643K 85 0 ether_multi 1 0K 0K 78643K 4 0 mrt 0 0K 0K 78643K 2 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 204 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 108 37K 42K 78643K 1665 0 UVM aobj 28 2K 2K 78643K 28 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 52 0 NDP 12 0K 0K 78643K 19 0 temp 134 3015K 3079K 78643K 14592 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 8 0 4 1 0 1 1 0 8 0 rtpcb 80 36 0 34 1 0 1 1 0 8 0 rtentry 112 55 0 23 2 0 2 2 0 8 0 unpcb 120 747 0 739 2 0 2 2 0 8 1 syncache 264 5 0 5 2 2 0 1 0 8 0 tcpqe 32 122 0 122 1 1 0 1 0 8 0 tcpcb 544 133 0 129 2 1 1 2 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 90 0 90 1 1 0 1 0 8 0 inpcb 280 454 0 447 3 1 2 2 0 8 1 nd6 48 5 0 4 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 243 0 85 14 0 14 14 0 8 2 art_table 32 244 0 85 2 0 2 2 0 8 0 art_node 16 54 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 9 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 26 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1989 0 594 46 0 46 46 0 8 0 ffsino 240 1989 0 594 83 0 83 83 0 8 0 nchpl 144 2699 0 1084 61 0 61 61 0 8 0 uvmvnodes 72 2210 0 0 41 0 41 41 0 8 0 vnodes 208 2210 0 0 117 0 117 117 0 8 0 namei 1024 7729 0 7729 1 0 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 528 2 0 0 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 0 1 1 0 8 1 scxspl 192 8792 0 8792 10 7 3 7 0 8 3 plimitpl 152 44 0 37 1 0 1 1 0 8 0 sigapl 432 493 0 480 2 0 2 2 0 8 0 futexpl 56 9866 0 9866 1 0 1 1 0 8 1 knotepl 112 98 0 79 1 0 1 1 0 8 0 kqueuepl 104 120 0 118 1 0 1 1 0 8 0 pipepl 128 314 0 296 3 1 2 2 0 8 1 fdescpl 424 494 0 480 2 0 2 2 0 8 0 filepl 120 4502 0 4417 6 1 5 5 0 8 1 lockfpl 104 121 0 120 1 0 1 1 0 8 0 lockfspl 48 41 0 40 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 25 0 15 1 0 1 1 0 8 0 ucredpl 96 301 0 294 1 0 1 1 0 8 0 zombiepl 144 484 0 483 1 0 1 1 0 8 0 processpl 864 512 0 483 4 0 4 4 0 8 0 procpl 632 935 0 899 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 1 0 1 0 8 0 sockpl 384 1239 0 1222 6 0 6 6 0 8 4 mcl64k 65536 299 0 299 33 29 4 33 0 8 4 mcl16k 16384 4 0 4 3 2 1 1 0 8 1 mcl12k 12288 9 0 8 2 1 1 1 0 8 0 mcl9k 9216 8 0 8 2 1 1 1 0 8 1 mcl8k 8192 11 0 11 2 1 1 1 0 8 1 mcl4k 4096 51 0 50 2 1 1 1 0 8 0 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 69774 0 69724 16 9 7 14 0 8 0 mtagpl 80 12 0 12 2 1 1 1 0 8 1 mbufpl 256 113036 0 112968 30 19 11 24 0 8 2 bufpl 280 7862 0 2969 350 0 350 350 0 8 0 anonpl 16 79114 0 58697 105 6 99 99 0 62 14 amapchunkpl 152 2619 0 2471 18 8 10 16 0 158 3 amappl16 192 3443 0 2314 78 9 69 69 0 8 12 amappl15 184 52 0 48 1 0 1 1 0 8 0 amappl14 176 25 0 23 1 0 1 1 0 8 0 amappl12 160 146 0 143 2 1 1 1 0 8 0 amappl11 152 199 0 186 1 0 1 1 0 8 0 amappl10 144 9 0 8 1 0 1 1 0 8 0 amappl9 136 545 0 542 1 0 1 1 0 8 0 amappl8 128 125 0 97 1 0 1 1 0 8 0 amappl7 120 90 0 80 1 0 1 1 0 8 0 amappl6 112 205 0 193 1 0 1 1 0 8 0 amappl5 104 319 0 306 1 0 1 1 0 8 0 amappl4 96 583 0 554 1 0 1 1 0 8 0 amappl3 88 272 0 263 1 0 1 1 0 8 0 amappl2 80 3174 0 3113 3 1 2 3 0 8 0 amappl1 72 18498 0 18084 26 17 9 20 0 8 0 amappl 80 1167 0 1124 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 27 0 0 1 0 1 1 0 8 0 uaddrrnd 24 496 0 480 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 496 0 480 1 0 1 1 0 8 0 vmmpekpl 168 7181 0 7159 2 0 2 2 0 8 0 vmmpepl 168 67097 0 64890 138 25 113 132 0 357 13 vmsppl 272 495 0 480 2 0 2 2 0 8 0 pdppl 4096 998 0 962 6 1 5 6 0 8 0 pvpl 32 213679 0 190264 233 5 228 228 0 265 37 pmappl 200 495 0 480 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 200 0 65 6 0 6 6 0 8 1