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(bfffefffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a05000) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000a31000) at in_ifdetach+0x74 sys/netinet/in.c:969 if_detach(ffff800000a31000) at if_detach+0x140 sys/net/if.c:1151 tun_clone_destroy(ffff800000a31000) at tun_clone_destroy+0x172 sys/net/if_tun.c:312 spec_close(ffff800017b580f0) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd8036156c30,7,fffffd803f7c6c00,ffff800015963650) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd802d574f10,ffff800015963650) at vn_closefile+0xd3 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd802d574f10,ffff800015963650) at vn_closefile+0xd3 sys/kern/vfs_vnops.c:610 fdrop(fffffd802d574f10,ffff800015963650) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802d574f10,ffff800015963650) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff800015963650) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff800015963650,19,1) at exit1+0x32f sys/kern/kern_exit.c:196 postsig(ffff800015963650,19) at postsig+0x4a6 sigexit sys/kern/kern_sig.c:1499 [inline] postsig(ffff800015963650,19) at postsig+0x4a6 sys/kern/kern_sig.c:1431 userret(ffff800015963650) at userret+0x159 sys/kern/kern_sig.c:1889 syscall(ffff800017b58570) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:115 [inline] syscall(ffff800017b58570) at syscall+0x42e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff4070, count: -16 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff800017b57f20 rbx 0 rdx 0x3 rcx 0x1 rax 0 r8 0xffff800000a05000 r9 0x5 r10 0xd0470dc46e69a96b r11 0xbdbfaf6520121226 r12 0 r13 0x3 r14 0xbfffefffffffffff r15 0x1 rip 0xffffffff8152520d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800017b57ec0 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.1) pid=32860 stat=onproc flags process=a proc=2000 pri=17, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800015963160,0xffff800015962790 process=0xffff8000ffff6010 user=0xffff800017b53000, vmspace=0xfffffd802cff1008 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 89296 492770 1 0 3 0x100083 ttyin getty 67204 309385 0 0 3 0x14200 bored sosplice 99643 473399 42634 0 2 0x2 syz-executor.0 42634 146831 24134 0 3 0x82 thrsleep syz-fuzzer 42634 281875 24134 0 3 0x4000082 nanosleep syz-fuzzer 42634 260200 24134 0 3 0x4000082 thrsleep syz-fuzzer 42634 238538 24134 0 3 0x4000082 thrsleep syz-fuzzer 42634 406130 24134 0 3 0x4000082 thrsleep syz-fuzzer 42634 312726 24134 0 2 0x4000082 syz-fuzzer 42634 399334 24134 0 3 0x4000082 thrsleep syz-fuzzer 42634 414908 24134 0 3 0x4000082 thrsleep syz-fuzzer 24134 93896 13812 0 3 0x10008a pause ksh 13812 33327 9478 0 2 0x92 sshd 9478 438769 1 0 2 0x80 sshd 93621 352146 13057 73 3 0x100090 kqread syslogd 13057 513000 1 0 3 0x100082 netio syslogd 42815 238431 1 77 2 0x100090 dhclient 62830 280198 1 0 2 0x80 dhclient 97700 134315 0 0 2 0x14200 zerothread 26263 198711 0 0 3 0x14200 aiodoned aiodoned 7792 77566 0 0 3 0x14200 syncer update 71433 184085 0 0 3 0x14200 cleaner cleaner 89082 291216 0 0 3 0x14200 reaper reaper 89350 32594 0 0 3 0x14200 pgdaemon pagedaemon 26801 114509 0 0 3 0x14200 bored crynlk 3721 36756 0 0 3 0x14200 bored crypto 14465 249732 0 0 3 0x40014200 acpi0 acpi0 12990 470126 0 0 2 0x14200 softnet 36210 458134 0 0 3 0x14200 bored systqmp 96772 294858 0 0 3 0x14200 bored systq 673 221500 0 0 3 0x40014200 bored softclock 36603 239503 0 0 3 0x40014200 idle0 91613 213717 0 0 3 0x14200 bored smr 1 69996 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 9500 6351K 7626K 78643K 13048 0 pcb 13 10K 12K 78643K 126 0 rtable 104 4K 4K 78643K 411 0 ifaddr 72 14K 14K 78643K 158 0 counters 19 16K 16K 78643K 19 0 ioctlops 0 0K 2K 78643K 56 0 iov 0 0K 16K 78643K 121 0 mount 1 1K 1K 78643K 1 0 vnodes 1231 77K 78K 78643K 1885 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 10 0 VM map 2 0K 0K 78643K 2 0 sem 12 1K 1K 78643K 12 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 4 9K 25K 78643K 456 0 sigio 0 0K 0K 78643K 43 0 proc 49 38K 54K 78643K 452 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 142 0 in_multi 63 3K 3K 78643K 104 0 ether_multi 1 0K 0K 78643K 6 0 mrt 0 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 54 238K 238K 78643K 54 0 exec 0 0K 1K 78643K 236 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 128 136K 136K 78643K 1998 0 UVM aobj 43 2K 2K 78643K 47 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 83 0 NDP 12 0K 0K 78643K 32 0 temp 134 3018K 3094K 78643K 33388 0 kqueue 0 0K 0K 78643K 2 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 6 1 0 1 1 0 8 0 rtpcb 80 71 0 69 1 0 1 1 0 8 0 rtentry 112 70 0 31 2 0 2 2 0 8 0 unpcb 120 341 0 333 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 286 0 286 2 2 0 1 0 8 0 tcpcb 544 477 0 473 14 13 1 14 0 8 0 ipq 40 3 0 3 2 2 0 1 0 8 0 ipqe 40 53 0 53 2 2 0 1 0 8 0 inpcb 280 921 0 914 10 9 1 9 0 8 0 rttmr 72 2 0 2 1 1 0 1 0 8 0 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 6 0 6 1 1 0 1 0 8 0 nd6 48 7 0 4 1 0 1 1 0 8 0 ppxss 1128 8 0 8 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 349 0 127 16 2 14 16 0 8 0 art_table 32 350 0 127 3 0 3 3 0 8 0 art_node 16 68 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 13 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 45 0 4 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2091 0 694 46 0 46 46 0 8 0 ffsino 240 2091 0 694 83 0 83 83 0 8 0 nchpl 144 3063 0 1471 61 0 61 61 0 8 0 uvmvnodes 72 2698 0 0 50 0 50 50 0 8 0 vnodes 208 2698 0 0 142 0 142 142 0 8 0 namei 1024 9123 0 9122 1 0 1 1 0 8 0 vcpupl 1984 14 0 0 2 0 2 2 0 8 0 vmpool 528 18 0 4 1 0 1 1 0 8 0 scxspl 192 9714 0 9714 9 6 3 7 0 8 3 plimitpl 152 49 0 42 1 0 1 1 0 8 0 sigapl 432 625 0 613 2 0 2 2 0 8 0 futexpl 56 15459 0 15459 1 0 1 1 0 8 1 knotepl 112 116 0 97 1 0 1 1 0 8 0 kqueuepl 104 238 0 236 4 3 1 4 0 8 0 pipepl 128 470 0 452 3 1 2 2 0 8 1 fdescpl 424 626 0 613 2 0 2 2 0 8 0 filepl 120 5530 0 5445 13 8 5 11 0 8 1 lockfpl 104 191 0 190 1 0 1 1 0 8 0 lockfspl 48 65 0 64 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 21 0 11 1 0 1 1 0 8 0 ucredpl 96 597 0 590 1 0 1 1 0 8 0 zombiepl 144 614 0 613 1 0 1 1 0 8 0 processpl 864 641 0 613 4 0 4 4 0 8 0 procpl 632 1204 0 1169 5 1 4 5 0 8 0 sosppl 128 9 0 9 3 2 1 1 0 8 1 sockpl 384 1344 0 1327 16 12 4 14 0 8 2 mcl64k 65536 30 0 30 2 1 1 1 0 8 1 mcl16k 16384 9 0 9 2 1 1 1 0 8 1 mcl12k 12288 19 0 19 1 0 1 1 0 8 1 mcl9k 9216 6 0 6 1 0 1 1 0 8 1 mcl8k 8192 32 0 32 1 0 1 1 0 8 1 mcl4k 4096 58 0 58 2 1 1 1 0 8 1 mcl2k2 2112 2 0 2 1 1 0 1 0 8 0 mcl2k 2048 69935 0 69895 15 9 6 15 0 8 0 mtagpl 80 261 0 194 5 3 2 4 0 8 0 mbufpl 256 115345 0 115138 36 16 20 35 0 8 0 bufpl 280 8530 0 3560 356 0 356 356 0 8 0 anonpl 16 74320 0 54264 84 2 82 83 0 62 0 amapchunkpl 152 2623 0 2476 7 0 7 7 0 158 0 amappl16 192 3108 0 1973 59 0 59 59 0 8 2 amappl15 184 114 0 108 1 0 1 1 0 8 0 amappl14 176 171 0 169 1 0 1 1 0 8 0 amappl12 160 7 0 6 2 1 1 1 0 8 0 amappl11 152 266 0 253 1 0 1 1 0 8 0 amappl10 144 10 0 7 1 0 1 1 0 8 0 amappl9 136 574 0 571 1 0 1 1 0 8 0 amappl8 128 132 0 105 1 0 1 1 0 8 0 amappl7 120 106 0 94 1 0 1 1 0 8 0 amappl6 112 263 0 257 1 0 1 1 0 8 0 amappl5 104 154 0 143 1 0 1 1 0 8 0 amappl4 96 855 0 826 1 0 1 1 0 8 0 amappl3 88 141 0 133 1 0 1 1 0 8 0 amappl2 80 4212 0 4149 3 1 2 3 0 8 0 amappl1 72 20807 0 20399 26 16 10 20 0 8 0 amappl 80 1473 0 1423 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 46 0 4 1 0 1 1 0 8 0 uaddrrnd 24 644 0 617 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 644 0 617 1 0 1 1 0 8 0 vmmpekpl 168 8065 0 8041 2 0 2 2 0 8 0 vmmpepl 168 82418 0 80252 165 27 138 142 0 357 38 vmsppl 272 643 0 617 2 0 2 2 0 8 0 pdppl 4096 1294 0 1248 8 1 7 7 0 8 1 pvpl 32 227591 0 204588 195 4 191 195 0 265 1 pmappl 200 643 0 617 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 188 0 46 5 0 5 5 0 8 0