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(bf3fffffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a5a500) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000a15000) at in_ifdetach+0x74 sys/netinet/in.c:969 if_detach(ffff800000a15000) at if_detach+0x140 sys/net/if.c:1151 tun_clone_destroy(ffff800000a15000) at tun_clone_destroy+0x179 sys/net/if_tun.c:312 spec_close(ffff800020b89360) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd8073a311a8,7,fffffd807f7c6a20,ffff800020ace508) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd8065bc4bf8,ffff800020ace508) at vn_closefile+0xd8 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8065bc4bf8,ffff800020ace508) at vn_closefile+0xd8 sys/kern/vfs_vnops.c:610 fdrop(fffffd8065bc4bf8,ffff800020ace508) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd8065bc4bf8,ffff800020ace508) at closef+0x11d sys/kern/kern_descrip.c:1257 fdfree(ffff800020ace508) at fdfree+0x101 sys/kern/kern_descrip.c:1189 exit1(ffff800020ace508,0,3) at exit1+0x32f sys/kern/kern_exit.c:196 single_thread_check(ffff800020ace508,0) at single_thread_check+0x144 sys/kern/kern_sig.c:1944 userret(ffff800020ace508) at userret+0x34a sys/kern/kern_sig.c:1913 syscall(ffff800020b89740) at syscall+0x55f mi_syscall_return sys/sys/syscall_mi.h:115 [inline] syscall(ffff800020b89740) at syscall+0x55f sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe90c0, count: -16 ddb{1}> show registers rdi 0x2 rsi 0 rbp 0xffff800020b89190 rbx 0 rdx 0xffff800020ace508 rcx 0 rax 0 r8 0xffffffff81342423 rt_ifa_purge+0x153 r9 0x5 r10 0x2f r11 0x818c3b89ce33317d r12 0 r13 0x3 r14 0xbf3fffffffffffff r15 0x1 rip 0xffffffff81eee24d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800020b89130 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> show proc PROC (syz-executor.1) pid=431438 stat=onproc flags process=1018 proc=82000 pri=32, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff800020acf8c8,0xffff800021ba0a18 process=0xffff800020aece00 user=0xffff800020b84000, vmspace=0xfffffd8065595b90 estcpu=26, cpticks=10, pctcpu=0.20 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 91157 298368 94979 0 3 0x80 nanosleep syz-executor.0 91157 28214 94979 0 3 0x4000080 fifor syz-executor.0 91157 57271 94979 0 3 0x4000080 fsleep syz-executor.0 65568 86879 0 0 3 0x14200 bored sosplice 94979 291489 75391 0 3 0x82 nanosleep syz-executor.0 75391 44693 31545 0 3 0x82 thrsleep syz-fuzzer 75391 82534 31545 0 3 0x4000082 nanosleep syz-fuzzer 75391 468877 31545 0 3 0x4000082 thrsleep syz-fuzzer 75391 37505 31545 0 3 0x4000082 thrsleep syz-fuzzer 75391 133749 31545 0 3 0x4000082 thrsleep syz-fuzzer 75391 192616 31545 0 3 0x4000082 thrsleep syz-fuzzer 75391 148720 31545 0 3 0x4000082 thrsleep syz-fuzzer 75391 466570 31545 0 3 0x4000082 thrsleep syz-fuzzer 75391 298247 31545 0 2 0x4000082 syz-fuzzer 75391 89346 31545 0 3 0x4000082 thrsleep syz-fuzzer 31545 368197 27519 0 3 0x10008a pause ksh 27519 395548 862 0 3 0x92 select sshd 8201 216010 1 0 3 0x100083 ttyin getty 862 328836 1 0 3 0x80 select sshd 69354 279145 95224 74 3 0x100092 bpf pflogd 95224 99194 1 0 3 0x80 netio pflogd 4829 485282 19667 73 3 0x100090 kqread syslogd 19667 429316 1 0 3 0x100082 netio syslogd 37512 133593 1 77 2 0x100090 dhclient 57069 386647 1 0 3 0x80 poll dhclient 76224 236580 0 0 2 0x14200 zerothread 80202 428672 0 0 3 0x14200 aiodoned aiodoned 44923 18235 0 0 3 0x14200 syncer update 27895 6084 0 0 3 0x14200 cleaner cleaner 19227 10882 0 0 7 0x14200 reaper 81809 7724 0 0 3 0x14200 pgdaemon pagedaemon 7826 345489 0 0 3 0x14200 bored crynlk 89487 417663 0 0 3 0x14200 bored crypto 90376 380111 0 0 3 0x40014200 acpi0 acpi0 63719 65152 0 0 3 0x40014200 idle1 88552 322306 0 0 2 0x14200 softnet 47265 218479 0 0 2 0x14200 systqmp 57714 453035 0 0 3 0x14200 bored systq 55795 254898 0 0 3 0x40014200 bored softclock 37783 304924 0 0 3 0x40014200 idle0 17873 272684 0 0 3 0x14200 bored smr 1 364015 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 9536 6423K 7069K 78643K 11536 0 pcb 13 8K 8K 78643K 123 0 rtable 100 3K 4K 78643K 335 0 ifaddr 90 17K 17K 78643K 154 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1504 0 iov 0 0K 16K 78643K 90 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 76K 77K 78643K 1530 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 18 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 442 0 sigio 0 0K 0K 78643K 14 0 proc 61 63K 95K 78643K 463 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 79 0 in_multi 72 3K 3K 78643K 110 0 ether_multi 1 0K 0K 78643K 4 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 78 344K 344K 78643K 78 0 exec 0 0K 1K 78643K 248 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 144 88K 89K 78643K 3039 0 UVM aobj 32 2K 2K 78643K 33 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 2K 78643K 125 0 NDP 14 0K 0K 78643K 32 0 temp 144 3019K 3089K 78643K 24436 0 kqueue 0 0K 0K 78643K 7 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 7 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 51 0 49 1 0 1 1 0 8 0 rtentry 112 62 0 22 2 0 2 2 0 8 0 unpcb 120 319 0 307 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 717 0 717 2 2 0 2 0 8 0 tcpcb 544 256 0 252 2 1 1 2 0 8 0 inpcb 280 717 0 710 5 4 1 3 0 8 0 rttmr 72 2 0 2 2 2 0 1 0 8 0 nd6 48 7 0 4 1 0 1 1 0 8 0 ppxss 1128 6 0 6 2 2 0 1 0 8 0 pffrag 232 11 0 11 5 5 0 1 0 482 0 pffrnode 88 11 0 11 5 5 0 1 0 8 0 pffrent 40 452 0 452 5 5 0 1 0 8 0 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 50 0 20 1 0 1 1 0 8 0 pfstkey 112 50 0 20 2 0 2 2 0 8 0 pfstate 328 50 0 20 4 0 4 4 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 291 0 89 14 0 14 14 0 8 0 art_table 32 293 0 89 2 0 2 2 0 8 0 art_node 16 61 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 64 0 47 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 12 0 2 1 0 1 1 0 8 0 shmpl 112 31 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2109 0 698 46 0 46 46 0 8 0 ffsino 272 2109 0 698 95 0 95 95 0 8 0 nchpl 144 3026 0 1403 61 0 61 61 0 8 0 uvmvnodes 72 2352 0 0 43 0 43 43 0 8 0 vnodes 208 2352 0 0 124 0 124 124 0 8 0 namei 1024 9295 0 9295 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 8 0 0 1 0 1 1 0 8 0 vmpool 560 14 0 6 1 0 1 1 0 8 0 scxspl 192 8608 0 8608 10 9 1 6 0 8 1 plimitpl 152 49 0 41 1 0 1 1 0 8 0 sigapl 432 641 0 626 3 1 2 3 0 8 0 futexpl 56 8829 0 8828 1 0 1 1 0 8 0 knotepl 112 164 0 145 2 1 1 2 0 8 0 kqueuepl 104 198 0 196 1 0 1 1 0 8 0 pipepl 160 1114 0 1098 2 0 2 2 0 8 1 fdescpl 488 642 0 626 3 0 3 3 0 8 0 filepl 152 5977 0 5887 10 5 5 7 0 8 0 lockfpl 104 213 0 212 1 0 1 1 0 8 0 lockfspl 48 50 0 49 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 29 0 18 1 0 1 1 0 8 0 ucredpl 96 1052 0 1042 1 0 1 1 0 8 0 zombiepl 144 627 0 625 1 0 1 1 0 8 0 processpl 896 658 0 625 4 0 4 4 0 8 0 procpl 632 2232 0 2187 6 1 5 6 0 8 0 srpgc 64 3 0 0 1 0 1 1 0 8 0 sosppl 128 3 0 3 1 1 0 1 0 8 0 sockpl 384 1091 0 1070 9 6 3 5 0 8 0 mcl64k 65536 256 0 0 32 6 26 32 0 8 1 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 15 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 217 0 0 27 1 26 27 0 8 0 mtagpl 80 22 0 0 1 0 1 1 0 8 0 mbufpl 256 352 0 0 22 0 22 22 0 8 0 bufpl 280 7415 0 1340 434 0 434 434 0 8 0 anonpl 16 86883 0 66153 103 19 84 96 0 125 0 amapchunkpl 152 4951 0 4766 16 8 8 12 0 158 0 amappl16 192 3425 0 2297 75 18 57 67 0 8 0 amappl15 184 58 0 54 1 0 1 1 0 8 0 amappl14 176 267 0 262 1 0 1 1 0 8 0 amappl12 160 3 0 2 2 1 1 1 0 8 0 amappl11 152 60 0 43 1 0 1 1 0 8 0 amappl10 144 18 0 13 1 0 1 1 0 8 0 amappl9 136 748 0 744 1 0 1 1 0 8 0 amappl8 128 343 0 312 2 0 2 2 0 8 0 amappl7 120 105 0 94 1 0 1 1 0 8 0 amappl6 112 67 0 58 1 0 1 1 0 8 0 amappl5 104 258 0 244 1 0 1 1 0 8 0 amappl4 96 704 0 673 1 0 1 1 0 8 0 amappl3 88 531 0 519 1 0 1 1 0 8 0 amappl2 80 4188 0 4110 3 1 2 3 0 8 0 amappl1 72 24736 0 24253 26 16 10 21 0 8 0 amappl 80 2482 0 2423 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 32 0 1 1 0 1 1 0 8 0 uaddrrnd 24 656 0 632 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 656 0 632 1 0 1 1 0 8 0 vmmpekpl 168 11502 0 11466 2 0 2 2 0 8 0 vmmpepl 168 88499 0 86100 138 29 109 129 0 357 1 vmsppl 368 655 0 632 3 0 3 3 0 8 0 pdppl 4096 1319 0 1272 7 0 7 7 0 8 0 pvpl 32 251288 0 227590 226 31 195 222 0 265 3 pmappl 232 655 0 632 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 216 0 11 6 0 6 6 0 8 0