kernel: protection fault trap, code=0 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace in_delmulti(bffffffedffffeff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a1b200) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff8000009c1000) at in_ifdetach+0x74 sys/netinet/in.c:969 if_detach(ffff8000009c1000) at if_detach+0x140 sys/net/if.c:1151 tun_clone_destroy(ffff8000009c1000) at tun_clone_destroy+0x179 sys/net/if_tun.c:312 spec_close(ffff800020b710e0) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd806e08f278,7,fffffd807f7c6840,ffff800020acf8c8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd80682df608,ffff800020acf8c8) at vn_closefile+0xd8 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80682df608,ffff800020acf8c8) at vn_closefile+0xd8 sys/kern/vfs_vnops.c:610 fdrop(fffffd80682df608,ffff800020acf8c8) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd80682df608,ffff800020acf8c8) at closef+0x11d sys/kern/kern_descrip.c:1257 fdfree(ffff800020acf8c8) at fdfree+0x101 sys/kern/kern_descrip.c:1189 exit1(ffff800020acf8c8,19,1) at exit1+0x32f sys/kern/kern_exit.c:196 postsig(ffff800020acf8c8,19) at postsig+0x4e3 sigexit sys/kern/kern_sig.c:1499 [inline] postsig(ffff800020acf8c8,19) at postsig+0x4e3 sys/kern/kern_sig.c:1431 userret(ffff800020acf8c8) at userret+0x199 sys/kern/kern_sig.c:1889 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x7f7ffffe98c0, count: -15 ddb{1}> show registers rdi 0x2 rsi 0 rbp 0xffff800020b70f10 rbx 0 rdx 0xffff800020acf8c8 rcx 0 rax 0 r8 0xffffffff817560d3 rt_ifa_purge+0x153 r9 0x5 r10 0x2f r11 0x52949661011e7d5d r12 0 r13 0x3 r14 0xbffffffedffffeff r15 0x1 rip 0xffffffff81bf1c8d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800020b70eb0 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> show proc PROC (syz-executor.0) pid=95510 stat=onproc flags process=a proc=2000 pri=17, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff800020acfb40,0xffff800020acf3e8 process=0xffff800020aed880 user=0xffff800020b6c000, vmspace=0xfffffd807f0085c0 estcpu=36, cpticks=4, pctcpu=0.16 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 62662 441111 45366 0 3 0x82 nanosleep syz-executor.1 45366 254392 27133 0 2 0x82 syz-fuzzer 45366 109390 27133 0 3 0x4000082 nanosleep syz-fuzzer 45366 223906 27133 0 3 0x4000082 thrsleep syz-fuzzer 45366 386354 27133 0 3 0x4000082 thrsleep syz-fuzzer 45366 196435 27133 0 3 0x4000082 thrsleep syz-fuzzer 45366 198864 27133 0 3 0x4000082 nanosleep syz-fuzzer 45366 362036 27133 0 3 0x4000082 thrsleep syz-fuzzer 45366 178108 27133 0 3 0x4000082 thrsleep syz-fuzzer 45366 325322 27133 0 3 0x4000082 thrsleep syz-fuzzer 45366 121901 27133 0 3 0x4000082 thrsleep syz-fuzzer 27133 27698 77399 0 3 0x10008a pause ksh 77399 302460 79823 0 3 0x92 select sshd 89674 213972 1 0 3 0x100083 ttyin getty 79823 478280 1 0 3 0x80 select sshd 4832 201301 31293 74 3 0x100092 bpf pflogd 31293 321442 1 0 3 0x80 netio pflogd 64838 395546 51291 73 3 0x100090 kqread syslogd 51291 276028 1 0 3 0x100082 netio syslogd 67285 85059 1 77 2 0x100090 dhclient 73515 48798 1 0 3 0x80 poll dhclient 47367 101970 0 0 2 0x14200 zerothread 32231 295033 0 0 3 0x14200 aiodoned aiodoned 3195 17083 0 0 3 0x14200 syncer update 75686 213863 0 0 3 0x14200 cleaner cleaner 5632 140340 0 0 7 0x14200 reaper 25571 80958 0 0 3 0x14200 pgdaemon pagedaemon 26445 509201 0 0 3 0x14200 bored crynlk 25373 191644 0 0 3 0x14200 bored crypto 17553 189180 0 0 3 0x40014200 acpi0 acpi0 6220 26161 0 0 3 0x40014200 idle1 56569 2141 0 0 2 0x14200 softnet 16426 383571 0 0 2 0x14200 systqmp 85231 148343 0 0 3 0x14200 bored systq 29501 112198 0 0 3 0x40014200 bored softclock 13224 178529 0 0 3 0x40014200 idle0 4572 88333 0 0 3 0x14200 bored smr 1 82595 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9492 6406K 7181K 78643K 11310 0 pcb 13 14K 18K 78643K 76 0 rtable 100 3K 4K 78643K 339 0 ifaddr 64 14K 14K 78643K 120 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1525 0 iov 0 0K 16K 78643K 35 0 mount 1 1K 1K 78643K 1 0 vnodes 1216 76K 77K 78643K 1530 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 359 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 4 9K 25K 78643K 725 0 proc 61 63K 95K 78643K 562 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 322 0 in_multi 58 3K 3K 78643K 451 0 ether_multi 1 0K 0K 78643K 1 0 mrt 0 0K 0K 78643K 32 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 263 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 101 21K 21K 78643K 2524 0 UVM aobj 130 4K 4K 78643K 130 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 66 0 NDP 9 0K 0K 78643K 22 0 temp 124 3018K 3083K 78643K 6860 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 27 0 25 1 0 1 1 0 8 0 rtentry 112 61 0 21 2 0 2 2 0 8 0 unpcb 120 714 0 704 1 0 1 1 0 8 0 syncache 264 17 0 17 2 1 1 1 0 8 1 tcpqe 32 5 0 5 1 0 1 1 0 8 1 tcpcb 544 7297 0 7293 15 6 9 15 0 8 8 inpcb 280 8478 0 8471 16 7 9 16 0 8 8 rttmr 72 16 0 16 1 0 1 1 0 8 1 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 9 0 9 1 0 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 12 0 5 1 0 1 1 0 8 0 pfstkey 112 12 0 5 1 0 1 1 0 8 0 pfstate 328 12 0 5 1 0 1 1 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 212 0 0 14 0 14 14 0 8 0 art_table 32 213 0 0 2 0 2 2 0 8 0 art_node 16 60 0 20 1 0 1 1 0 8 0 sysvmsgpl 40 60 0 20 1 0 1 1 0 8 0 semupl 112 19 0 19 1 1 0 1 0 8 0 semapl 112 357 0 347 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2576 0 1167 46 0 46 46 0 8 0 ffsino 272 2576 0 1167 95 0 95 95 0 8 0 nchpl 144 3969 0 2352 61 0 61 61 0 8 0 uvmvnodes 72 2780 0 0 51 0 51 51 0 8 0 vnodes 208 2780 0 0 147 0 147 147 0 8 0 namei 1024 10339 0 10339 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 10165 0 10165 8 7 1 7 0 8 1 plimitpl 152 32 0 24 1 0 1 1 0 8 0 sigapl 432 924 0 910 3 1 2 3 0 8 0 futexpl 56 32771 0 32771 1 0 1 1 0 8 1 knotepl 112 72 0 53 1 0 1 1 0 8 0 kqueuepl 104 7607 0 7605 7 0 7 7 0 8 6 pipepl 160 672 0 654 1 0 1 1 0 8 0 fdescpl 488 925 0 910 3 0 3 3 0 8 0 filepl 152 21143 0 21053 23 11 12 22 0 8 8 lockfpl 104 499 0 498 1 0 1 1 0 8 0 lockfspl 48 234 0 233 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 955 0 946 1 0 1 1 0 8 0 zombiepl 144 911 0 909 1 0 1 1 0 8 0 processpl 896 940 0 909 4 0 4 4 0 8 0 procpl 632 1764 0 1724 4 0 4 4 0 8 0 srpgc 64 2 0 0 1 0 1 1 0 8 0 sockpl 384 9219 0 9200 25 15 10 24 0 8 8 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k 2048 107 0 0 13 0 13 13 0 8 0 mtagpl 80 32 0 0 1 0 1 1 0 8 0 mbufpl 256 254 0 0 15 0 15 15 0 8 0 bufpl 280 7211 0 1340 420 0 420 420 0 8 0 anonpl 16 66980 0 63556 18 3 15 15 0 125 0 amapchunkpl 152 3355 0 3266 6 0 6 6 0 158 0 amappl16 192 3202 0 3064 8 0 8 8 0 8 0 amappl15 184 58 0 55 1 0 1 1 0 8 0 amappl14 176 28 0 26 1 0 1 1 0 8 0 amappl13 168 3 0 2 1 0 1 1 0 8 0 amappl12 160 359 0 357 2 1 1 1 0 8 0 amappl11 152 60 0 45 1 0 1 1 0 8 0 amappl10 144 368 0 360 1 0 1 1 0 8 0 amappl9 136 603 0 599 1 0 1 1 0 8 0 amappl8 128 118 0 98 1 0 1 1 0 8 0 amappl7 120 448 0 437 1 0 1 1 0 8 0 amappl6 112 59 0 52 1 0 1 1 0 8 0 amappl5 104 475 0 461 1 0 1 1 0 8 0 amappl4 96 831 0 804 1 0 1 1 0 8 0 amappl3 88 455 0 448 1 0 1 1 0 8 0 amappl2 80 6636 0 6569 3 1 2 3 0 8 0 amappl1 72 27197 0 26755 27 17 10 21 0 8 0 amappl 80 2002 0 1969 1 0 1 1 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 64 129 0 0 3 0 3 3 0 8 0 uaddrrnd 24 925 0 910 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 925 0 910 1 0 1 1 0 8 0 vmmpekpl 168 10046 0 10015 2 0 2 2 0 8 0 vmmpepl 168 113302 0 112103 91 28 63 82 0 357 0 vmsppl 368 924 0 909 2 0 2 2 0 8 0 pdppl 4096 1857 0 1818 6 0 6 6 0 8 1 pvpl 32 314215 0 307627 117 21 96 117 0 265 37 pmappl 232 924 0 909 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 176 0 9 5 0 5 5 0 8 0