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(bffffffef7ffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a24100) 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(ffff80001492fbd0) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd803b5e3ea0,7,fffffd803f7c6a80,ffff8000ffff9150) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd802d5cccb8,ffff8000ffff9150) at vn_closefile+0xd3 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd802d5cccb8,ffff8000ffff9150) at vn_closefile+0xd3 sys/kern/vfs_vnops.c:610 fdrop(fffffd802d5cccb8,ffff8000ffff9150) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802d5cccb8,ffff8000ffff9150) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff9150) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff9150,19,1) at exit1+0x32f sys/kern/kern_exit.c:196 postsig(ffff8000ffff9150,19) at postsig+0x4a6 sigexit sys/kern/kern_sig.c:1499 [inline] postsig(ffff8000ffff9150,19) at postsig+0x4a6 sys/kern/kern_sig.c:1431 userret(ffff8000ffff9150) at userret+0x159 sys/kern/kern_sig.c:1889 syscall(ffff800014930050) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:115 [inline] syscall(ffff800014930050) at syscall+0x42e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc8b30, count: -16 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff80001492fa00 rbx 0 rdx 0x3 rcx 0x1 rax 0 r8 0xffff800000a24100 r9 0x5 r10 0xdc98acc892936212 r11 0x34fdc218968baa88 r12 0 r13 0x3 r14 0xbffffffef7ffffff r15 0x1 rip 0xffffffff8152520d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001492f9a0 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.1) pid=471531 stat=onproc flags process=a proc=2000 pri=17, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff98b8,0xffff800014924790 process=0xffff8000148b2378 user=0xffff80001492b000, vmspace=0xfffffd803f012aa0 estcpu=36, cpticks=3, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 43617 21466 54249 0 2 0 syz-executor.0 43617 285550 54249 0 3 0x4000080 kqread syz-executor.0 54249 56899 15359 0 3 0x82 nanosleep syz-executor.0 53228 84731 0 0 3 0x14200 bored sosplice 15359 86281 71049 0 3 0x82 thrsleep syz-fuzzer 15359 179653 71049 0 3 0x4000082 nanosleep syz-fuzzer 15359 133750 71049 0 3 0x4000082 thrsleep syz-fuzzer 15359 369054 71049 0 3 0x4000082 thrsleep syz-fuzzer 15359 230783 71049 0 2 0x4000082 syz-fuzzer 15359 511142 71049 0 3 0x4000082 thrsleep syz-fuzzer 15359 387822 71049 0 3 0x4000082 thrsleep syz-fuzzer 15359 99202 71049 0 3 0x4000082 thrsleep syz-fuzzer 71049 315485 33333 0 3 0x10008a pause ksh 33333 235974 83863 0 3 0x92 select sshd 44299 307049 1 0 3 0x100083 ttyin getty 83863 225240 1 0 3 0x80 select sshd 59973 413614 87237 73 3 0x100090 kqread syslogd 87237 464727 1 0 3 0x100082 netio syslogd 42787 296390 1 77 2 0x100090 dhclient 46883 293342 1 0 3 0x80 poll dhclient 93048 214608 0 0 2 0x14200 zerothread 43558 322678 0 0 3 0x14200 aiodoned aiodoned 49596 413778 0 0 3 0x14200 syncer update 88939 345209 0 0 3 0x14200 cleaner cleaner 44116 431395 0 0 3 0x14200 reaper reaper 50036 318605 0 0 3 0x14200 pgdaemon pagedaemon 84577 109536 0 0 3 0x14200 bored crynlk 82630 88752 0 0 3 0x14200 bored crypto 29768 359586 0 0 3 0x40014200 acpi0 acpi0 53675 86630 0 0 2 0x14200 softnet 47375 225872 0 0 3 0x14200 bored systqmp 42940 247096 0 0 3 0x14200 bored systq 17477 404925 0 0 3 0x40014200 bored softclock 85966 396291 0 0 3 0x40014200 idle0 967 122832 0 0 3 0x14200 bored smr 1 417602 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 9498 6346K 7167K 78643K 12258 0 pcb 13 11K 12K 78643K 205 0 rtable 99 3K 4K 78643K 447 0 ifaddr 65 13K 14K 78643K 191 0 counters 19 16K 16K 78643K 19 0 ioctlops 0 0K 2K 78643K 54 0 iov 0 0K 28K 78643K 136 0 mount 1 1K 1K 78643K 1 0 vnodes 1216 76K 77K 78643K 1768 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 13 0 VM map 2 0K 0K 78643K 2 0 sem 11 1K 1K 78643K 15 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 5 13K 25K 78643K 681 0 sigio 0 0K 0K 78643K 45 0 proc 48 38K 63K 78643K 463 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 74 0 in_multi 59 3K 3K 78643K 94 0 ether_multi 1 0K 0K 78643K 9 0 mrt 0 0K 0K 78643K 15 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 60 265K 265K 78643K 60 0 exec 0 0K 1K 78643K 266 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 135 55K 55K 78643K 2560 0 UVM aobj 37 4K 4K 78643K 44 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 150 0 NDP 11 0K 0K 78643K 39 0 temp 131 3018K 3658K 78643K 62189 0 kqueue 0 0K 0K 78643K 6 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 89 0 87 1 0 1 1 0 8 0 rtentry 112 63 0 25 2 0 2 2 0 8 0 unpcb 120 2646 0 2636 3 1 2 2 0 8 1 syncache 264 11 0 11 3 2 1 1 0 8 1 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 86 0 86 2 1 1 1 0 8 1 tcpcb 544 732 0 728 25 22 3 14 0 8 2 ipq 40 5 0 5 3 3 0 1 0 8 0 ipqe 40 98 0 98 3 3 0 1 0 8 0 inpcb 280 2481 0 2474 16 13 3 9 0 8 2 rttmr 72 5 0 5 4 3 1 1 0 8 1 nd6 48 6 0 4 1 0 1 1 0 8 0 ppxss 1128 12 0 12 3 2 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 287 0 106 15 2 13 14 0 8 1 art_table 32 288 0 106 2 0 2 2 0 8 0 art_node 16 62 0 27 1 0 1 1 0 8 0 sysvmsgpl 40 33 0 22 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 42 0 7 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2487 0 1090 46 0 46 46 0 8 0 ffsino 240 2487 0 1090 83 0 83 83 0 8 0 nchpl 144 3685 0 2081 62 1 61 61 0 8 0 uvmvnodes 72 2920 0 0 54 0 54 54 0 8 0 vnodes 208 2920 0 0 154 0 154 154 0 8 0 namei 1024 10881 0 10881 1 0 1 1 0 8 1 vcpupl 1984 6 0 0 1 0 1 1 0 8 0 vmpool 528 8 0 2 1 0 1 1 0 8 0 scxspl 192 11470 0 11470 13 9 4 7 0 8 4 plimitpl 152 65 0 58 1 0 1 1 0 8 0 sigapl 432 849 0 836 2 0 2 2 0 8 0 futexpl 56 24987 0 24987 1 0 1 1 0 8 1 knotepl 112 159 0 140 1 0 1 1 0 8 0 kqueuepl 104 464 0 461 7 6 1 4 0 8 0 pipepl 128 522 0 504 4 2 2 2 0 8 1 fdescpl 424 850 0 836 2 0 2 2 0 8 0 filepl 120 9964 0 9878 17 12 5 11 0 8 2 lockfpl 104 249 0 248 1 0 1 1 0 8 0 lockfspl 48 88 0 87 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 24 0 14 1 0 1 1 0 8 0 ucredpl 96 769 0 762 1 0 1 1 0 8 0 zombiepl 144 837 0 836 1 0 1 1 0 8 0 processpl 864 865 0 836 4 0 4 4 0 8 0 procpl 632 1738 0 1701 4 0 4 4 0 8 0 sosppl 128 5 0 5 2 2 0 1 0 8 0 sockpl 384 5283 0 5262 22 16 6 14 0 8 2 mcl64k 65536 321 0 321 32 31 1 32 0 8 1 mcl16k 16384 19 0 19 3 2 1 1 0 8 1 mcl12k 12288 31 0 31 1 0 1 1 0 8 1 mcl9k 9216 20 0 20 3 2 1 1 0 8 1 mcl8k 8192 116 0 116 1 0 1 1 0 8 1 mcl4k 4096 226 0 226 2 1 1 1 0 8 1 mcl2k2 2112 6 0 6 2 2 0 1 0 8 0 mcl2k 2048 71028 0 70980 18 10 8 14 0 8 1 mtagpl 80 35 0 28 2 1 1 1 0 8 0 mbufpl 256 122553 0 122466 53 16 37 37 0 8 25 bufpl 280 8529 0 3482 361 0 361 361 0 8 0 anonpl 16 118007 0 97528 99 15 84 98 0 62 0 amapchunkpl 152 4632 0 4474 25 6 19 21 0 158 10 amappl16 192 5992 0 4868 87 29 58 68 0 8 1 amappl15 184 53 0 49 1 0 1 1 0 8 0 amappl14 176 32 0 30 1 0 1 1 0 8 0 amappl13 168 189 0 188 1 0 1 1 0 8 0 amappl12 160 6 0 6 1 1 0 1 0 8 0 amappl11 152 49 0 37 1 0 1 1 0 8 0 amappl10 144 11 0 8 1 0 1 1 0 8 0 amappl9 136 675 0 670 1 0 1 1 0 8 0 amappl8 128 277 0 241 2 0 2 2 0 8 0 amappl7 120 98 0 86 1 0 1 1 0 8 0 amappl6 112 63 0 55 1 0 1 1 0 8 0 amappl5 104 215 0 205 1 0 1 1 0 8 0 amappl4 96 1081 0 1057 1 0 1 1 0 8 0 amappl3 88 165 0 156 1 0 1 1 0 8 0 amappl2 80 6264 0 6189 3 1 2 3 0 8 0 amappl1 72 25172 0 24749 26 16 10 20 0 8 0 amappl 80 2008 0 1958 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 7 1 0 1 1 0 8 0 uaddrrnd 24 858 0 838 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 858 0 838 1 0 1 1 0 8 0 vmmpekpl 168 9535 0 9508 2 0 2 2 0 8 0 vmmpepl 168 110092 0 107847 167 34 133 141 0 357 32 vmsppl 272 857 0 838 2 0 2 2 0 8 0 pdppl 4096 1722 0 1682 7 1 6 6 0 8 0 pvpl 32 302439 0 278943 225 17 208 225 0 265 17 pmappl 200 857 0 838 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 248 0 87 6 0 6 6 0 8 0