panic: broken type ref goroutine 30 [running]: github.com/google/syzkaller/prog.ArgCommon.Type(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:39 github.com/google/syzkaller/prog.(*ConstArg).Size(0xc002240300, 0xc002240300) /syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:59 +0xed github.com/google/syzkaller/prog.foreachArgImpl(0x9b47c0, 0xc002c56b00, 0xc0022319c0, 0xc000551750) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:142 +0x2ba github.com/google/syzkaller/prog.foreachArgImpl(0x9b47c0, 0xc002c56aa0, 0xc0022319c0, 0xc000551750) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:141 +0x2a3 github.com/google/syzkaller/prog.foreachArgImpl(0x9b47c0, 0xc002c56a00, 0xc0022319c0, 0xc000551750) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:141 +0x2a3 github.com/google/syzkaller/prog.foreachArgImpl(0x9b47c0, 0xc002c569c0, 0xc0022319c0, 0xc000551750) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:141 +0x2a3 github.com/google/syzkaller/prog.foreachArgImpl(0x9b4800, 0xc002232270, 0xc0022319c0, 0xc000551750) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:156 +0x5e5 github.com/google/syzkaller/prog.foreachArgImpl(0x9b47c0, 0xc002c569a0, 0xc0022319c0, 0xc000551750) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:141 +0x2a3 github.com/google/syzkaller/prog.foreachArgImpl(0x9b4800, 0xc002232240, 0xc0022319c0, 0xc000551750) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:156 +0x5e5 github.com/google/syzkaller/prog.ForeachArg(0xc002231480, 0xc000551750) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:122 +0xdd github.com/google/syzkaller/prog.getCompatibleResources(0xc002231380, 0x9015b6, 0xb, 0xc002303b00, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:892 +0xb9 github.com/google/syzkaller/prog.(*randGen).resourceCentric(0xc002303b00, 0xc00019fe50, 0xcafba0, 0x927e00, 0xc000551948, 0x9bace0, 0xc0002ac780, 0x2, 0x1) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:840 +0xfe github.com/google/syzkaller/prog.(*ResourceType).generate(0xcafba0, 0xc002303b00, 0xc00019fe50, 0xc0021a9900, 0x6e, 0xc0005519d8, 0x203000, 0x927ef0, 0x83bbe0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:669 +0x27c github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc002303b00, 0xc00019fe50, 0x9bac00, 0xcafba0, 0xc000550000, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:658 +0x450 github.com/google/syzkaller/prog.(*randGen).generateArg(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:608 github.com/google/syzkaller/prog.regenerate(0xc002303b00, 0xc00019fe50, 0x9b4840, 0xc0018ee3c0, 0x7a64dd, 0x2ee, 0x9bac00, 0xcafba0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:246 +0xa9 github.com/google/syzkaller/prog.(*ResourceType).mutate(0xcafba0, 0xc002303b00, 0xc00019fe50, 0x9b4840, 0xc0018ee3c0, 0xc0023025e8, 0xd46f20, 0xc, 0xc, 0xc0018ee330, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:315 +0x4d github.com/google/syzkaller/prog.(*Target).mutateArg(0xc0000796c0, 0xc002303b00, 0xc00019fe50, 0x9b4840, 0xc0018ee3c0, 0xc0023025e8, 0xd46f20, 0xc, 0xc, 0xc0018ee330, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:229 +0xe3 github.com/google/syzkaller/prog.(*mutator).mutateArg(0xc000551e18, 0xa) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:182 +0x288 github.com/google/syzkaller/prog.(*Prog).Mutate(0xc0018f3400, 0x9ade40, 0xc002249440, 0x14, 0xc00217d640, 0xc002982000, 0x25c5, 0x3000) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:47 +0x32c main.(*Proc).smashInput(0xc00217d6c0, 0xc001a3b040) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:213 +0x131 main.(*Proc).loop(0xc00217d6c0) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:78 +0x16b created by main.main /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:260 +0x1188 OpenBSD/amd64 (ci-openbsd-multicore-7.c.syzkaller.internal) (tty00) login: kernel: protection fault trap, code=0 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace in_delmulti(fdf7ffffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b3d700) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac4000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac4000) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac4000) at tun_clone_destroy+0x1e1 sys/net/if_tun.c:326 tun_dev_close(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff800020ede220) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd806ecff278,7,fffffd807f7bf840,ffff800020dddd48) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80675bb738,ffff800020dddd48) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80675bb738,ffff800020dddd48) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80675bb738,ffff800020dddd48) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80675bb738,ffff800020dddd48) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff800020dddd48) at fdfree+0x101 sys/kern/kern_descrip.c:1195 exit1(ffff800020dddd48,0,d,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff800020dddd48,d) at postsig+0x4ed sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff800020dddd48,d) at postsig+0x4ed sys/kern/kern_sig.c:1415 userret(ffff800020dddd48) at userret+0x199 sys/kern/kern_sig.c:1872 syscall(ffff800020ede6a0) at syscall+0x55f mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff800020ede6a0) at syscall+0x55f sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd6d00, count: -17 ddb{1}> show registers rdi 0x2 rsi 0 rbp 0xffff800020eddff0 rbx 0 rdx 0xffff800020dddd48 rcx 0 rax 0 r8 0xffffffff814f4283 rt_ifa_purge+0x153 r9 0x5 r10 0x3 r11 0xf93bd4c1d5053961 r12 0 r13 0x3 r14 0xfdf7ffffffffffff r15 0x1 rip 0xffffffff817e8dad in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800020eddf90 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> show proc PROC (syz-executor.0) pid=480220 stat=onproc flags process=a proc=2000 pri=32, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff800020e3f010,0xffff800020ddd608 process=0xffff800020df0bb0 user=0xffff800020ed9000, vmspace=0xfffffd807effecf0 estcpu=36, cpticks=1, pctcpu=0.8 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95007 492154 0 0 3 0x14280 nfsidl nfsio 7511 110943 0 0 3 0x14280 nfsidl nfsio 5812 110558 0 0 3 0x14280 nfsidl nfsio 14947 231864 0 0 3 0x14280 nfsidl nfsio 99135 32 0 0 3 0x14280 nfsidl nfsio 99185 20415 0 0 3 0x14280 nfsidl nfsio 90775 135656 0 0 3 0x14280 nfsidl nfsio 453 217528 0 0 3 0x14280 nfsidl nfsio 79060 119892 0 0 3 0x14280 nfsidl nfsio 65441 93421 0 0 3 0x14280 nfsidl nfsio 69144 199056 0 0 3 0x14280 nfsidl nfsio 16374 198815 0 0 3 0x14280 nfsidl nfsio 31628 357955 0 0 3 0x14280 nfsidl nfsio 83204 306370 0 0 3 0x14280 nfsidl nfsio 3190 322119 0 0 3 0x14280 nfsidl nfsio 42122 349577 0 0 3 0x14280 nfsidl nfsio 65136 271215 0 0 3 0x14280 nfsidl nfsio 87363 375344 0 0 3 0x14280 nfsidl nfsio 53007 25682 0 0 3 0x14280 nfsidl nfsio 17690 69835 0 0 3 0x14280 nfsidl nfsio 69853 132349 63486 0 2 0x100002 ksh 63486 63707 32006 0 3 0x92 select sshd 22286 88113 1 0 3 0x100083 ttyin getty 32006 230638 1 0 3 0x80 select sshd 16984 372437 58483 74 3 0x100092 bpf pflogd 58483 418234 1 0 3 0x80 netio pflogd 64313 449626 26070 73 3 0x100090 kqread syslogd 26070 205917 1 0 3 0x100082 netio syslogd 99546 353054 1 77 2 0x100090 dhclient 49035 79413 1 0 3 0x80 poll dhclient 61610 356076 0 0 3 0x14200 bored smr 65508 33882 0 0 3 0x14200 pgzero zerothread 92137 94982 0 0 3 0x14200 aiodoned aiodoned 90087 38349 0 0 3 0x14200 syncer update 76495 160188 0 0 3 0x14200 cleaner cleaner 84650 75213 0 0 3 0x14200 reaper reaper 56872 466563 0 0 3 0x14200 pgdaemon pagedaemon 9010 146360 0 0 3 0x14200 bored crynlk 40203 440196 0 0 3 0x14200 bored crypto 63724 297796 0 0 3 0x40014200 acpi0 acpi0 73699 138312 0 0 3 0x40014200 idle1 73742 226772 0 0 3 0x14200 bored softnet 21361 398520 0 0 2 0x14200 systqmp 10374 355507 0 0 3 0x14200 bored systq 952 64675 0 0 3 0x40014200 bored softclock 85969 159525 0 0 3 0x40014200 idle0 1 253886 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 9493 6407K 6729K 78643K 10849 0 pcb 13 8K 8K 78643K 38 0 rtable 108 4K 4K 78643K 306 0 ifaddr 59 12K 12K 78643K 94 0 counters 43 33K 34K 78643K 53 0 ioctlops 0 0K 4K 78643K 1632 0 iov 0 0K 16K 78643K 26 0 mount 1 1K 1K 78643K 1 0 vnodes 1228 77K 77K 78643K 1329 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 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 70 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 3 8K 25K 78643K 388 0 sigio 0 0K 0K 78643K 2 0 proc 61 63K 95K 78643K 490 0 subproc 14 0K 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 15 0 in_multi 43 2K 2K 78643K 87 0 ether_multi 1 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 243 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 72 52K 56K 78643K 2148 0 UVM aobj 23 2K 2K 78643K 27 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 20 0 NDP 9 0K 0K 78643K 26 0 temp 119 3862K 3926K 78643K 12785 0 kqueue 2 2K 12K 78643K 15 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 8 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 37 0 35 1 0 1 1 0 8 0 rtentry 112 71 0 27 2 0 2 2 0 8 0 unpcb 120 275 0 265 1 0 1 1 0 8 0 syncache 264 7 0 7 2 2 0 1 0 8 0 tcpcb 544 70 0 67 1 0 1 1 0 8 0 inpcb 296 242 0 236 3 2 1 2 0 8 0 nd6 48 20 0 11 1 0 1 1 0 8 0 ppxss 1136 1 0 1 1 1 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 26 0 7 1 0 1 1 0 8 0 pfstkey 112 26 0 7 1 0 1 1 0 8 0 pfstate 328 26 0 7 2 0 2 2 0 8 0 pfrule 1360 21 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 294 0 90 15 0 15 15 0 8 0 art_table 32 295 0 90 2 0 2 2 0 8 0 art_node 16 68 0 25 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 2 1 0 1 1 0 8 0 semupl 112 11 0 11 1 1 0 1 0 8 0 semapl 112 64 0 54 1 0 1 1 0 8 0 shmpl 112 24 0 5 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1949 0 542 89 0 89 89 0 8 0 ffsino 272 1949 0 542 95 0 95 95 0 8 0 nchpl 144 2732 0 1138 60 0 60 60 0 8 0 uvmvnodes 72 2075 0 0 38 0 38 38 0 8 0 vnodes 208 2075 0 0 110 0 110 110 0 8 0 namei 1024 7588 0 7588 1 0 1 1 0 8 1 percpumem 16 37 0 5 1 0 1 1 0 8 0 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 560 6 0 3 2 1 1 1 0 8 0 scxspl 192 7927 0 7927 6 5 1 5 0 8 1 plimitpl 152 32 0 24 1 0 1 1 0 8 0 sigapl 424 620 0 571 6 0 6 6 0 8 0 futexpl 56 4596 0 4596 1 0 1 1 0 8 1 knotepl 112 85 0 80 1 0 1 1 0 8 0 kqueuepl 144 40 0 39 1 0 1 1 0 8 0 pipepl 304 134 0 126 3 2 1 3 0 8 0 fdescpl 496 585 0 571 3 0 3 3 0 8 0 filepl 152 3230 0 3162 7 2 5 7 0 8 1 lockfpl 104 57 0 56 1 0 1 1 0 8 0 lockfspl 48 24 0 23 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 367 0 358 1 0 1 1 0 8 0 zombiepl 144 573 0 570 1 0 1 1 0 8 0 processpl 992 620 0 570 7 0 7 7 0 8 0 procpl 624 1325 0 1275 6 0 6 6 0 8 1 sockpl 400 556 0 538 5 2 3 4 0 8 1 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 268 0 0 33 0 33 33 0 8 0 mtagpl 96 20 0 0 1 0 1 1 0 8 0 mbufpl 256 281 0 0 17 0 17 17 0 8 0 bufpl 280 4075 0 132 282 0 282 282 0 8 0 anonpl 16 68232 0 66919 67 1 66 66 0 124 43 amapchunkpl 152 3524 0 3485 21 15 6 19 0 158 3 amappl16 192 2353 0 2336 45 0 45 45 0 8 36 amappl15 184 101 0 100 1 0 1 1 0 8 0 amappl14 176 28 0 25 1 0 1 1 0 8 0 amappl13 168 35 0 32 1 0 1 1 0 8 0 amappl12 160 9 0 9 1 1 0 1 0 8 0 amappl11 152 63 0 48 1 0 1 1 0 8 0 amappl10 144 125 0 123 1 0 1 1 0 8 0 amappl9 136 633 0 630 1 0 1 1 0 8 0 amappl8 128 379 0 378 2 0 2 2 0 8 1 amappl7 120 127 0 118 1 0 1 1 0 8 0 amappl6 112 30 0 28 2 1 1 1 0 8 0 amappl5 104 479 0 462 1 0 1 1 0 8 0 amappl4 96 504 0 479 1 0 1 1 0 8 0 amappl3 88 112 0 107 1 0 1 1 0 8 0 amappl2 80 3788 0 3730 2 0 2 2 0 8 0 amappl1 72 25597 0 25166 23 13 10 18 0 8 0 amappl 80 1587 0 1561 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 26 0 4 1 0 1 1 0 8 0 uaddrrnd 24 591 0 574 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 591 0 574 1 0 1 1 0 8 0 vmmpekpl 168 8351 0 8308 3 0 3 3 0 8 0 vmmpepl 168 81008 0 80036 149 30 119 124 0 357 63 vmsppl 368 590 0 574 2 0 2 2 0 8 0 pdppl 4096 1189 0 1151 6 0 6 6 0 8 0 pvpl 32 224997 0 221750 162 4 158 162 0 265 87 pmappl 232 590 0 574 4 2 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 282 0 5 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82780ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828df818) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828df818) at __mp_lock+0x127 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828df818,2) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff800021ef7988,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 cond_wait(ffff800021ef7a08,ffffffff8240165b) at cond_wait+0x76 sys/kern/kern_synch.c:907 smr_barrier_impl(0) at smr_barrier_impl+0xf9 sys/kern/kern_smr.c:271 tun_clone_destroy(ffff800000aef800) at tun_clone_destroy+0x136 sys/net/if_tun.c:311 tun_dev_close(5d01,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff800021ef7b70) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd806ecff418,7,fffffd807f7bf840,ffff800020ddd5f8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80675bbdc0,ffff800020ddd5f8) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80675bbdc0,ffff800020ddd5f8) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80675bbdc0,ffff800020ddd5f8) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80675bbdc0,ffff800020ddd5f8) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff800020ddd5f8) at fdfree+0x101 sys/kern/kern_descrip.c:1195 exit1(ffff800020ddd5f8,0,d,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff800020ddd5f8,d) at postsig+0x4ed sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff800020ddd5f8,d) at postsig+0x4ed sys/kern/kern_sig.c:1415 userret(ffff800020ddd5f8) at userret+0x199 sys/kern/kern_sig.c:1872 syscall(ffff800021ef7ff0) at syscall+0x55f mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff800021ef7ff0) at syscall+0x55f sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffefb20, count: -22 ddb{0}> machine ddbcpu 1 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> trace in_delmulti(fdf7ffffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b3d700) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac4000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac4000) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac4000) at tun_clone_destroy+0x1e1 sys/net/if_tun.c:326 tun_dev_close(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff800020ede220) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd806ecff278,7,fffffd807f7bf840,ffff800020dddd48) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80675bb738,ffff800020dddd48) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80675bb738,ffff800020dddd48) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80675bb738,ffff800020dddd48) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80675bb738,ffff800020dddd48) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff800020dddd48) at fdfree+0x101 sys/kern/kern_descrip.c:1195 exit1(ffff800020dddd48,0,d,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff800020dddd48,d) at postsig+0x4ed sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff800020dddd48,d) at postsig+0x4ed sys/kern/kern_sig.c:1415 userret(ffff800020dddd48) at userret+0x199 sys/kern/kern_sig.c:1872 syscall(ffff800020ede6a0) at syscall+0x55f mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff800020ede6a0) at syscall+0x55f sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd6d00, count: -17