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(ffff800000a38f00) 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(ffff800014f56220) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd803b2f0dd0,7,fffffd803f7c6b40,ffff8000ffff8008) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd803adfbe10,ffff8000ffff8008) at vn_closefile+0xd3 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd803adfbe10,ffff8000ffff8008) at vn_closefile+0xd3 sys/kern/vfs_vnops.c:610 fdrop(fffffd803adfbe10,ffff8000ffff8008) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd803adfbe10,ffff8000ffff8008) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff8008) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff8008,19,1) at exit1+0x32f sys/kern/kern_exit.c:196 postsig(ffff8000ffff8008,19) at postsig+0x4a6 sigexit sys/kern/kern_sig.c:1499 [inline] postsig(ffff8000ffff8008,19) at postsig+0x4a6 sys/kern/kern_sig.c:1431 userret(ffff8000ffff8008) at userret+0x159 sys/kern/kern_sig.c:1889 syscall(ffff800014f566a0) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:115 [inline] syscall(ffff800014f566a0) at syscall+0x42e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc7a80, count: -16 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff800014f56050 rbx 0 rdx 0x3 rcx 0x1 rax 0 r8 0xffff800000a38f00 r9 0x5 r10 0x73b3db1f7a97e64e r11 0xa023393d491eb902 r12 0 r13 0x3 r14 0xfff7f7ffffffffff r15 0x1 rip 0xffffffff8152520d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800014f55ff0 ss 0 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.1) pid=101036 stat=onproc flags process=a proc=2000 pri=17, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8770,0xffff8000ffff22a0 process=0xffff8000148b2a38 user=0xffff800014f51000, vmspace=0xfffffd803f012990 estcpu=27, cpticks=1, pctcpu=0.1 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 88414 164784 0 0 3 0x14200 bored sosplice 49291 160542 62422 0 2 0x2 syz-executor.0 62422 517149 82117 0 3 0x82 thrsleep syz-fuzzer 62422 441081 82117 0 2 0x4000002 syz-fuzzer 62422 62115 82117 0 2 0x4000002 syz-fuzzer 62422 167366 82117 0 3 0x4000082 thrsleep syz-fuzzer 62422 479670 82117 0 3 0x4000082 thrsleep syz-fuzzer 62422 137265 82117 0 3 0x4000082 thrsleep syz-fuzzer 62422 368195 82117 0 3 0x4000082 thrsleep syz-fuzzer 62422 307691 82117 0 3 0x4000082 thrsleep syz-fuzzer 82117 14037 5713 0 3 0x10008a pause ksh 5713 86229 88222 0 3 0x92 select sshd 38958 243586 1 0 3 0x100083 ttyin getty 88222 40227 1 0 3 0x80 select sshd 19400 207527 91176 73 3 0x100090 kqread syslogd 91176 416569 1 0 3 0x100082 netio syslogd 58259 325555 1 77 2 0x100090 dhclient 47405 288351 1 0 3 0x80 poll dhclient 84653 164743 0 0 2 0x14200 zerothread 8255 372022 0 0 3 0x14200 aiodoned aiodoned 98681 343226 0 0 3 0x14200 syncer update 86885 283052 0 0 3 0x14200 cleaner cleaner 63326 147001 0 0 3 0x14200 reaper reaper 44550 132783 0 0 3 0x14200 pgdaemon pagedaemon 2089 455042 0 0 3 0x14200 bored crynlk 96135 199588 0 0 3 0x14200 bored crypto 65186 98809 0 0 3 0x40014200 acpi0 acpi0 88333 41744 0 0 2 0x14200 softnet 47445 263484 0 0 2 0x14200 systqmp 50447 367359 0 0 3 0x14200 bored systq 67008 300557 0 0 3 0x40014200 bored softclock 33845 127904 0 0 3 0x40014200 idle0 92739 133357 0 0 3 0x14200 bored smr 1 369426 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 9485 6345K 7381K 78643K 11727 0 pcb 13 10K 12K 78643K 83 0 rtable 102 3K 4K 78643K 262 0 ifaddr 61 12K 13K 78643K 89 0 counters 19 16K 16K 78643K 19 0 ioctlops 0 0K 2K 78643K 31 0 iov 0 0K 16K 78643K 76 0 mount 1 1K 1K 78643K 1 0 vnodes 1229 77K 77K 78643K 1574 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 12 1K 1K 78643K 49 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 4 9K 25K 78643K 263 0 sigio 0 0K 0K 78643K 18 0 proc 48 38K 63K 78643K 384 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 6 0 in_multi 36 2K 2K 78643K 49 0 ether_multi 1 0K 0K 78643K 4 0 mrt 0 0K 0K 78643K 3 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 196 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 113 38K 47K 78643K 1489 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 69 0 NDP 11 0K 0K 78643K 19 0 temp 126 3014K 3081K 78643K 10230 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 9 0 3 1 0 1 1 0 8 0 rtpcb 80 41 0 39 1 0 1 1 0 8 0 rtentry 112 54 0 13 2 0 2 2 0 8 0 unpcb 120 209 0 201 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpqe 32 384 0 384 2 1 1 1 0 8 1 tcpcb 544 529 0 525 22 7 15 15 0 8 14 ipq 40 2 0 2 1 0 1 1 0 8 1 ipqe 40 4 0 4 1 0 1 1 0 8 1 inpcb 280 863 0 854 11 2 9 9 0 8 8 nd6 48 5 0 2 1 0 1 1 0 8 0 ppxss 1128 4 0 4 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 249 0 45 15 0 15 15 0 8 0 art_table 32 250 0 45 2 0 2 2 0 8 0 art_node 16 53 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 43 0 26 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 47 0 37 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 1789 0 392 46 0 46 46 0 8 0 ffsino 240 1789 0 392 83 0 83 83 0 8 0 nchpl 144 2368 0 749 61 0 61 61 0 8 0 uvmvnodes 72 2139 0 0 39 0 39 39 0 8 0 vnodes 208 2139 0 0 113 0 113 113 0 8 0 namei 1024 6611 0 6611 1 0 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 7867 0 7867 10 7 3 7 0 8 3 plimitpl 152 31 0 24 1 0 1 1 0 8 0 sigapl 432 434 0 422 2 0 2 2 0 8 0 futexpl 56 8656 0 8656 1 0 1 1 0 8 1 knotepl 112 80 0 61 1 0 1 1 0 8 0 kqueuepl 104 325 0 323 6 2 4 4 0 8 3 pipepl 128 258 0 240 1 0 1 1 0 8 0 fdescpl 424 435 0 422 2 0 2 2 0 8 0 filepl 120 3678 0 3593 13 2 11 11 0 8 8 lockfpl 104 99 0 98 1 0 1 1 0 8 0 lockfspl 48 36 0 35 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 21 0 11 1 0 1 1 0 8 0 ucredpl 96 245 0 238 1 0 1 1 0 8 0 zombiepl 144 425 0 423 1 0 1 1 0 8 0 processpl 864 452 0 423 4 0 4 4 0 8 0 procpl 632 771 0 735 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 384 1113 0 1096 20 6 14 14 0 8 12 mcl64k 65536 36 0 36 1 0 1 1 0 8 1 mcl16k 16384 3 0 3 2 1 1 1 0 8 1 mcl12k 12288 8 0 8 2 1 1 1 0 8 1 mcl9k 9216 6 0 6 2 1 1 1 0 8 1 mcl8k 8192 18 0 18 1 0 1 1 0 8 1 mcl4k 4096 36 0 36 2 1 1 1 0 8 1 mcl2k2 2112 3 0 3 2 1 1 1 0 8 1 mcl2k 2048 68908 0 68849 24 16 8 18 0 8 0 mtagpl 80 16 0 8 2 1 1 1 0 8 0 mbufpl 256 111672 0 111520 17 2 15 15 0 8 2 bufpl 280 8716 0 3469 376 0 376 376 0 8 0 anonpl 16 68760 0 48839 103 6 97 97 0 62 15 amapchunkpl 152 2052 0 1890 14 2 12 12 0 158 4 amappl16 192 2867 0 1785 75 12 63 67 0 8 8 amappl15 184 50 0 46 1 0 1 1 0 8 0 amappl14 176 144 0 141 1 0 1 1 0 8 0 amappl12 160 117 0 116 2 1 1 1 0 8 0 amappl11 152 46 0 34 1 0 1 1 0 8 0 amappl10 144 20 0 15 1 0 1 1 0 8 0 amappl9 136 556 0 553 1 0 1 1 0 8 0 amappl8 128 130 0 102 1 0 1 1 0 8 0 amappl7 120 91 0 80 1 0 1 1 0 8 0 amappl6 112 53 0 48 1 0 1 1 0 8 0 amappl5 104 254 0 244 1 0 1 1 0 8 0 amappl4 96 653 0 626 1 0 1 1 0 8 0 amappl3 88 236 0 229 1 0 1 1 0 8 0 amappl2 80 2628 0 2569 3 1 2 3 0 8 0 amappl1 72 17179 0 16770 26 16 10 20 0 8 0 amappl 80 1000 0 958 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 24 439 0 424 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 439 0 424 1 0 1 1 0 8 0 vmmpekpl 168 6799 0 6774 2 0 2 2 0 8 0 vmmpepl 168 60548 0 58471 138 21 117 129 0 357 16 vmsppl 272 438 0 424 2 0 2 2 0 8 0 pdppl 4096 884 0 850 7 1 6 6 0 8 1 pvpl 32 201630 0 179023 226 5 221 221 0 265 35 pmappl 200 438 0 424 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 183 0 30 5 0 5 5 0 8 0