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(fff7f7ffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a19300) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff8000009ee800) at in_ifdetach+0x74 sys/netinet/in.c:969 if_detach(ffff8000009ee800) at if_detach+0x140 sys/net/if.c:1151 tun_clone_destroy(ffff8000009ee800) at tun_clone_destroy+0x172 sys/net/if_tun.c:312 spec_close(ffff800016b67e00) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd8036ceec30,7,fffffd803f7c6ba0,ffff8000ffff9b30) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd802d608bc8,ffff8000ffff9b30) at vn_closefile+0xd3 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd802d608bc8,ffff8000ffff9b30) at vn_closefile+0xd3 sys/kern/vfs_vnops.c:610 fdrop(fffffd802d608bc8,ffff8000ffff9b30) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802d608bc8,ffff8000ffff9b30) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff9b30) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff9b30,19,1) at exit1+0x32f sys/kern/kern_exit.c:196 postsig(ffff8000ffff9b30,19) at postsig+0x4a6 sigexit sys/kern/kern_sig.c:1499 [inline] postsig(ffff8000ffff9b30,19) at postsig+0x4a6 sys/kern/kern_sig.c:1431 userret(ffff8000ffff9b30) at userret+0x159 sys/kern/kern_sig.c:1889 syscall(ffff800016b68280) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:115 [inline] syscall(ffff800016b68280) at syscall+0x42e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdd770, count: -16 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff800016b67c30 rbx 0 rdx 0x3 rcx 0x1 rax 0 r8 0xffff800000a19300 r9 0x5 r10 0x68dff03c58b5d8a0 r11 0xeeea7d23a604ff99 r12 0 r13 0x3 r14 0xfff7f7ffffffffff r15 0x1 rip 0xffffffff8152520d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800016b67bd0 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.0) pid=55983 stat=onproc flags process=a proc=2000 pri=17, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8280,0xffff8000ffff58d0 process=0xffff8000148b2d98 user=0xffff800016b63000, vmspace=0xfffffd803f012000 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 92275 206877 7657 0 3 0x80 nanosleep syz-executor.1 92275 199404 7657 0 3 0x4000080 netcon syz-executor.1 92275 101392 7657 0 3 0x4000080 fsleep syz-executor.1 51522 288119 0 0 3 0x14200 bored sosplice 7657 110902 61581 0 3 0x82 nanosleep syz-executor.1 61581 428472 17030 0 3 0x82 thrsleep syz-fuzzer 61581 280931 17030 0 3 0x4000082 nanosleep syz-fuzzer 61581 328585 17030 0 3 0x4000082 thrsleep syz-fuzzer 61581 269281 17030 0 3 0x4000082 thrsleep syz-fuzzer 61581 63829 17030 0 2 0x4000082 syz-fuzzer 61581 499706 17030 0 3 0x4000082 thrsleep syz-fuzzer 61581 179502 17030 0 3 0x4000082 thrsleep syz-fuzzer 17030 459495 89205 0 3 0x10008a pause ksh 89205 255717 63356 0 3 0x92 select sshd 44463 2431 1 0 3 0x100083 ttyin getty 63356 466234 1 0 3 0x80 select sshd 30722 434541 67446 73 3 0x100090 kqread syslogd 67446 84531 1 0 3 0x100082 netio syslogd 99404 284779 1 77 2 0x100090 dhclient 43012 90238 1 0 3 0x80 poll dhclient 48568 331636 0 0 2 0x14200 zerothread 1055 181825 0 0 3 0x14200 aiodoned aiodoned 82497 333183 0 0 3 0x14200 syncer update 69389 447506 0 0 3 0x14200 cleaner cleaner 40852 241725 0 0 3 0x14200 reaper reaper 6854 467480 0 0 3 0x14200 pgdaemon pagedaemon 80608 157827 0 0 3 0x14200 bored crynlk 13270 401381 0 0 3 0x14200 bored crypto 89913 348454 0 0 3 0x40014200 acpi0 acpi0 27785 86185 0 0 2 0x14200 softnet 54265 346399 0 0 2 0x14200 systqmp 47941 493184 0 0 3 0x14200 bored systq 25421 67828 0 0 3 0x40014200 bored softclock 63499 284269 0 0 3 0x40014200 idle0 61028 10020 0 0 3 0x14200 bored smr 1 480900 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 6461K 6787K 78643K 10827 0 pcb 13 8K 8K 78643K 55 0 rtable 100 3K 4K 78643K 214 0 ifaddr 57 12K 13K 78643K 74 0 counters 19 16K 16K 78643K 19 0 ioctlops 0 0K 2K 78643K 27 0 iov 0 0K 12K 78643K 22 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1302 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 0K 0K 78643K 2 0 sem 10 1K 1K 78643K 10 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 5 13K 25K 78643K 130 0 sigio 0 0K 0K 78643K 1 0 proc 48 38K 54K 78643K 369 0 subproc 23 1K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 271 0 in_multi 52 2K 3K 78643K 87 0 ether_multi 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 42 185K 185K 78643K 42 0 exec 0 0K 1K 78643K 189 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 119 55K 56K 78643K 1214 0 UVM aobj 4 2K 2K 78643K 4 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 37 0 NDP 8 0K 0K 78643K 14 0 temp 98 3009K 3073K 78643K 33408 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 6 0 2 1 0 1 1 0 8 0 rtpcb 80 35 0 31 1 0 1 1 0 8 0 rtentry 112 45 0 5 2 0 2 2 0 8 0 unpcb 120 65 0 57 1 0 1 1 0 8 0 syncache 264 8 0 8 2 1 1 1 0 8 1 tcpqe 32 163 0 163 1 1 0 1 0 8 0 tcpcb 544 235 0 228 2 0 2 2 0 8 1 ipq 40 4 0 4 1 0 1 1 0 8 1 ipqe 40 12 0 12 1 0 1 1 0 8 1 inpcb 280 405 0 395 3 0 3 3 0 8 2 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 213 0 0 14 0 14 14 0 8 0 art_table 32 214 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 29 0 12 1 0 1 1 0 8 0 semupl 112 4 0 4 1 0 1 1 0 8 1 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1583 0 183 46 0 46 46 0 8 0 ffsino 240 1583 0 183 83 0 83 83 0 8 0 nchpl 144 1955 0 338 61 0 61 61 0 8 1 uvmvnodes 72 1682 0 0 31 0 31 31 0 8 0 vnodes 208 1682 0 0 89 0 89 89 0 8 0 namei 1024 5160 0 5160 1 0 1 1 0 8 1 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 528 4 0 0 1 0 1 1 0 8 0 scxspl 192 5476 0 5476 8 2 6 7 0 8 6 plimitpl 152 18 0 11 1 0 1 1 0 8 0 sigapl 432 301 0 288 2 0 2 2 0 8 0 futexpl 56 3701 0 3700 1 0 1 1 0 8 0 knotepl 112 60 0 41 1 0 1 1 0 8 0 kqueuepl 104 40 0 38 1 0 1 1 0 8 0 pipepl 128 220 0 200 2 0 2 2 0 8 1 fdescpl 424 302 0 288 2 0 2 2 0 8 0 filepl 120 2102 0 2008 5 0 5 5 0 8 1 lockfpl 104 44 0 43 1 0 1 1 0 8 0 lockfspl 48 14 0 13 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 38 0 27 1 0 1 1 0 8 0 ucredpl 96 190 0 183 1 0 1 1 0 8 0 zombiepl 144 289 0 288 1 0 1 1 0 8 0 processpl 864 317 0 288 4 0 4 4 0 8 0 procpl 632 474 0 437 4 0 4 4 0 8 0 sosppl 128 3 0 3 1 0 1 1 0 8 1 sockpl 384 505 0 483 4 0 4 4 0 8 1 mcl64k 65536 238 0 238 29 10 19 29 0 8 19 mcl16k 16384 6 0 6 1 0 1 1 0 8 1 mcl12k 12288 2 0 2 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 8 0 8 1 0 1 1 0 8 1 mcl4k 4096 27 0 27 2 1 1 1 0 8 1 mcl2k2 2112 2 0 2 1 0 1 1 0 8 1 mcl2k 2048 66159 0 66116 15 8 7 12 0 8 1 mtagpl 80 6 0 6 2 1 1 1 0 8 1 mbufpl 256 106388 0 106292 23 8 15 20 0 8 7 bufpl 280 6516 0 1637 349 0 349 349 0 8 0 anonpl 16 61825 0 42051 97 1 96 96 0 62 16 amapchunkpl 152 1936 0 1777 13 1 12 12 0 158 3 amappl16 192 2128 0 1046 69 7 62 67 0 8 7 amappl15 184 51 0 47 1 0 1 1 0 8 0 amappl14 176 85 0 81 1 0 1 1 0 8 0 amappl13 168 2 0 1 1 0 1 1 0 8 0 amappl12 160 9 0 8 1 0 1 1 0 8 0 amappl11 152 46 0 35 1 0 1 1 0 8 0 amappl10 144 12 0 9 1 0 1 1 0 8 0 amappl9 136 595 0 590 1 0 1 1 0 8 0 amappl8 128 176 0 147 1 0 1 1 0 8 0 amappl7 120 92 0 80 1 0 1 1 0 8 0 amappl6 112 56 0 48 1 0 1 1 0 8 0 amappl5 104 162 0 151 1 0 1 1 0 8 0 amappl4 96 526 0 496 1 0 1 1 0 8 0 amappl3 88 172 0 164 1 0 1 1 0 8 0 amappl2 80 1628 0 1560 3 1 2 3 0 8 0 amappl1 72 15101 0 14669 26 16 10 20 0 8 0 amappl 80 739 0 689 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 306 0 288 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 306 0 288 1 0 1 1 0 8 0 vmmpekpl 168 6261 0 6236 2 0 2 2 0 8 0 vmmpepl 168 45063 0 42853 143 13 130 134 0 357 31 vmsppl 272 305 0 288 2 0 2 2 0 8 0 pdppl 4096 618 0 580 7 1 6 6 0 8 1 pvpl 32 166785 0 144005 222 0 222 222 0 265 37 pmappl 200 305 0 288 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 186 0 30 6 0 6 6 0 8 0