panic: bad arg kind: goroutine 23 [running]: github.com/google/syzkaller/prog.clone(0x0, 0x0, 0xc0003f1288, 0xc000116dd0, 0xc0003f08d0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:79 +0x91b github.com/google/syzkaller/prog.clone(0x9b2de0, 0xc000a65b40, 0xc0003f1288, 0x9b2d60, 0xc000e28eb0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d github.com/google/syzkaller/prog.clone(0x9b2de0, 0xc000a65c00, 0xc0003f1288, 0x9b2de0, 0xc0003f0ad0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d github.com/google/syzkaller/prog.clone(0x9b2ea0, 0xc000a65c20, 0xc0003f1288, 0x9b2de0, 0xc0018e6e40) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:63 +0x839 github.com/google/syzkaller/prog.clone(0x9b2ea0, 0xc000a65c40, 0xc0003f1288, 0x9b2de0, 0xc0018e6680) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:63 +0x839 github.com/google/syzkaller/prog.clone(0x9b2de0, 0xc000a65c80, 0xc0003f1288, 0x9b2d60, 0xc000e28d90) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d github.com/google/syzkaller/prog.clone(0x9b2de0, 0xc000a65cc0, 0xc0003f1288, 0x2b1b7f230, 0xc0003f0ed0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d github.com/google/syzkaller/prog.clone(0x9b2ea0, 0xc000a65ce0, 0xc0003f1288, 0xc001d04fd0, 0xc001928ec0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:63 +0x839 github.com/google/syzkaller/prog.clone(0x9b2de0, 0xc000a65d20, 0xc0003f1288, 0x9b2de0, 0xc001929080) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d github.com/google/syzkaller/prog.clone(0x9b2de0, 0xc000a65d40, 0xc0003f1288, 0x2b1b7f230, 0xc0003f11d0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d github.com/google/syzkaller/prog.clone(0x9b2e20, 0xc000919380, 0xc0003f1288, 0x9b2d60, 0xc000e28cc0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:44 +0x567 github.com/google/syzkaller/prog.(*Prog).Clone(0xc000907800, 0x90010a) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:24 +0x279 github.com/google/syzkaller/prog.(*randGen).resourceCentric(0xc001e7cc40, 0xc00193d360, 0xcac6a0, 0x0, 0x9b2e60, 0xc001a86e40, 0xc00017b490, 0x1, 0xc0003f1598) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:848 +0xc2 github.com/google/syzkaller/prog.(*ResourceType).generate(0xcac6a0, 0xc001e7cc40, 0xc00193d360, 0x0, 0x9b2e60, 0xc000188000, 0x28a444008, 0x0, 0x1) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:678 +0x27c github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc001e7cc40, 0xc00193d360, 0x9b9100, 0xcac6a0, 0xc000170000, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:667 +0x450 github.com/google/syzkaller/prog.(*randGen).generateArg(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:617 github.com/google/syzkaller/prog.(*randGen).generateArgs(0xc001e7cc40, 0xc00193d360, 0xd402e0, 0xc, 0xc, 0xaaaaaaaaaaaaaa00, 0x38, 0x8, 0x2b1b8bbd0, 0x10, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:605 +0x116 github.com/google/syzkaller/prog.(*StructType).generate(0xcb6c60, 0xc001e7cc40, 0xc00193d360, 0x0, 0xd79600, 0x0, 0x0, 0x20, 0x20) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:789 +0x7c github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc001e7cc40, 0xc00193d360, 0x9b91c0, 0xcb6c60, 0x420000, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:667 +0x450 github.com/google/syzkaller/prog.(*randGen).generateArg(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:617 github.com/google/syzkaller/prog.(*randGen).generateArgs(0xc001e7cc40, 0xc00193d360, 0xcb6e20, 0x2, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:605 +0x116 github.com/google/syzkaller/prog.(*StructType).generate(0xcb6de0, 0xc001e7cc40, 0xc00193d360, 0x0, 0xd79600, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:789 +0x7c github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc001e7cc40, 0xc00193d360, 0x9b91c0, 0xcb6de0, 0xd70000, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:667 +0x450 github.com/google/syzkaller/prog.(*randGen).generateArg(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:617 github.com/google/syzkaller/prog.(*UnionType).mutate(0xcafaa0, 0xc001e7cc40, 0xc00193d360, 0x9b2ea0, 0xc001ec9ca0, 0xc001ec9a88, 0xcb5fa0, 0x2, 0x2, 0xc001a86960, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:457 +0x178 github.com/google/syzkaller/prog.(*Target).mutateArg(0xc0000e0000, 0xc001e7cc40, 0xc00193d360, 0x9b2ea0, 0xc001ec9ca0, 0xc001ec9a88, 0xcb5fa0, 0x2, 0x2, 0xc001a86960, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:229 +0xe3 github.com/google/syzkaller/prog.(*mutator).mutateArg(0xc0003f1ec0, 0xa) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:182 +0x288 github.com/google/syzkaller/prog.(*Prog).Mutate(0xc001a937c0, 0x9ac460, 0xc0026ec240, 0x14, 0xc0023f1440, 0xc002144000, 0x22ad, 0x2400) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:47 +0x32c main.(*Proc).loop(0xc0028c6040) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:95 +0x434 created by main.main /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:258 +0x1155 login: OpenBSD/amd64 (ci-openbsd-multicore-3.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(7fffffffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a49400) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000a29000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000a29000) at if_detach+0x140 sys/net/if.c:1149 tun_clone_destroy(ffff800000a29000) at tun_clone_destroy+0x1f2 sys/net/if_tun.c:329 tun_dev_close(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:480 spec_close(ffff800020f8b390) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd8079e63008,7,fffffd807f7bf9c0,ffff800020e6dad8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd8068824998,ffff800020e6dad8) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8068824998,ffff800020e6dad8) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8068824998,ffff800020e6dad8) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8068824998,ffff800020e6dad8) at closef+0x11c sys/kern/kern_descrip.c:1260 fdfree(ffff800020e6dad8) at fdfree+0x101 sys/kern/kern_descrip.c:1192 exit1(ffff800020e6dad8,0,d,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff800020e6dad8,d) at postsig+0x4ed sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff800020e6dad8,d) at postsig+0x4ed sys/kern/kern_sig.c:1415 userret(ffff800020e6dad8) at userret+0x199 sys/kern/kern_sig.c:1867 syscall(ffff800020f8b810) at syscall+0x55f mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff800020f8b810) at syscall+0x55f sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbb970, count: -17 ddb{1}> show registers rdi 0x2 rsi 0 rbp 0xffff800020f8b160 rbx 0 rdx 0xffff800020e6dad8 rcx 0 rax 0 r8 0xffffffff81f965c3 rt_ifa_purge+0x153 r9 0x5 r10 0x3 r11 0x399201ab65204a9f r12 0 r13 0x3 r14 0x7fffffffffffffff r15 0x1 rip 0xffffffff81de1e8d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800020f8b100 ss 0 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> show proc PROC (syz-executor.0) pid=197181 stat=onproc flags process=a proc=2000 pri=32, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6c9c8,0xffff800020ec6508 process=0xffff800020e81348 user=0xffff800020f86000, vmspace=0xfffffd807efff2e0 estcpu=28, cpticks=1, pctcpu=0.19 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 63022 240835 0 0 3 0x14200 acct acct 3400 495189 1 0 3 0x100083 ttyin getty 37410 238362 0 0 3 0x14200 bored sosplice 78169 452201 98959 0 2 0x100002 ksh 98959 338795 70388 0 3 0x92 select sshd 70388 431520 1 0 3 0x80 select sshd 75969 220270 38939 74 3 0x100092 bpf pflogd 38939 168035 1 0 3 0x80 netio pflogd 45721 246898 12304 73 3 0x100090 kqread syslogd 12304 421668 1 0 3 0x100082 netio syslogd 39247 241691 1 77 7 0x100090 dhclient 45765 377337 1 0 3 0x80 poll dhclient 17372 395481 0 0 3 0x14200 bored smr 71872 234345 0 0 3 0x14200 pgzero zerothread 84582 129600 0 0 3 0x14200 aiodoned aiodoned 4255 383214 0 0 3 0x14200 syncer update 79731 59310 0 0 3 0x14200 cleaner cleaner 12974 315715 0 0 3 0x14200 reaper reaper 60834 53030 0 0 3 0x14200 pgdaemon pagedaemon 97988 385509 0 0 3 0x14200 bored crynlk 18822 334811 0 0 3 0x14200 bored crypto 2071 451190 0 0 3 0x40014200 acpi0 acpi0 62033 68302 0 0 3 0x40014200 idle1 22202 96951 0 0 3 0x14200 bored softnet 19071 203440 0 0 2 0x14200 systqmp 92828 118725 0 0 3 0x14200 bored systq 2309 374939 0 0 3 0x40014200 bored softclock 91654 157888 0 0 3 0x40014200 idle0 1 405604 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 9526 6419K 6808K 78643K 11186 0 pcb 13 8K 8K 78643K 89 0 rtable 101 12K 12K 78643K 302 0 ifaddr 80 15K 16K 78643K 137 0 counters 43 33K 34K 78643K 61 0 ioctlops 0 0K 4K 78643K 1485 0 iov 0 0K 24K 78643K 634 0 mount 1 1K 1K 78643K 1 0 vnodes 1217 77K 77K 78643K 1428 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 62 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 3 8K 25K 78643K 373 0 sigio 0 0K 0K 78643K 2 0 proc 61 63K 95K 78643K 478 0 subproc 14 0K 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 31 0 in_multi 57 3K 3K 78643K 86 0 ether_multi 1 0K 0K 78643K 6 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 233 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 79 68K 72K 78643K 2170 0 UVM aobj 23 2K 2K 78643K 25 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 42 0 NDP 13 0K 0K 78643K 27 0 temp 119 3038K 3102K 78643K 5603 0 kqueue 2 2K 12K 78643K 20 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 43 0 41 1 0 1 1 0 8 0 rtentry 112 52 0 13 2 0 2 2 0 8 0 unpcb 120 279 0 269 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpqe 32 44 0 44 2 1 1 1 0 8 1 tcpcb 544 111 0 107 1 0 1 1 0 8 0 inpcb 280 361 0 353 4 2 2 2 0 8 1 nd6 48 9 0 3 1 0 1 1 0 8 0 ppxss 1128 2 0 2 2 1 1 1 0 8 1 pffrag 232 3 0 2 1 0 1 1 0 482 0 pffrnode 88 3 0 2 1 0 1 1 0 8 0 pffrent 40 49 0 48 1 0 1 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 35 0 7 1 0 1 1 0 8 0 pfstkey 112 35 0 7 1 0 1 1 0 8 0 pfstate 328 35 0 7 3 0 3 3 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 256 229 0 40 14 0 14 14 0 8 0 art_table 32 230 0 40 2 0 2 2 0 8 0 art_node 16 51 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 25 0 17 2 1 1 1 0 8 0 semapl 112 60 0 50 1 0 1 1 0 8 0 shmpl 112 23 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1960 0 553 89 0 89 89 0 8 0 ffsino 272 1960 0 553 96 1 95 95 0 8 0 nchpl 144 2901 0 1293 60 0 60 60 0 8 0 uvmvnodes 72 2136 0 0 39 0 39 39 0 8 0 vnodes 208 2136 0 0 113 0 113 113 0 8 0 namei 1024 8025 0 8025 1 0 1 1 0 8 1 percpumem 16 41 0 9 1 0 1 1 0 8 0 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 560 7 0 4 2 1 1 1 0 8 0 scxspl 192 7736 0 7736 8 7 1 7 0 8 1 plimitpl 152 54 0 46 1 0 1 1 0 8 0 sigapl 424 591 0 560 4 0 4 4 0 8 0 futexpl 56 6327 0 6327 1 0 1 1 0 8 1 knotepl 112 85 0 80 1 0 1 1 0 8 0 kqueuepl 144 82 0 74 1 0 1 1 0 8 0 pipelkpl 48 132 0 124 1 0 1 1 0 8 0 pipepl 120 264 0 253 1 0 1 1 0 8 0 fdescpl 496 574 0 560 3 0 3 3 0 8 0 filepl 152 3890 0 3822 5 0 5 5 0 8 0 lockfpl 104 130 0 129 1 0 1 1 0 8 0 lockfspl 48 44 0 43 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 19 0 8 1 0 1 1 0 8 0 ucredpl 96 374 0 365 1 0 1 1 0 8 0 zombiepl 144 562 0 560 1 0 1 1 0 8 0 processpl 984 591 0 560 5 0 5 5 0 8 0 procpl 624 1365 0 1334 4 0 4 4 0 8 0 sosppl 128 5 0 5 1 0 1 1 0 8 1 sockpl 400 683 0 664 5 1 4 4 0 8 1 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 178 0 0 22 0 22 22 0 8 0 mtagpl 80 29 0 0 1 0 1 1 0 8 0 mbufpl 256 245 0 0 15 0 15 15 0 8 0 bufpl 280 4185 0 133 290 0 290 290 0 8 0 anonpl 16 72206 0 70348 75 6 69 74 0 124 44 amapchunkpl 152 3334 0 3276 12 1 11 11 0 158 5 amappl16 192 2801 0 2767 50 11 39 49 0 8 30 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 198 0 194 1 0 1 1 0 8 0 amappl13 168 28 0 25 1 0 1 1 0 8 0 amappl12 160 18 0 16 1 0 1 1 0 8 0 amappl11 152 230 0 214 1 0 1 1 0 8 0 amappl10 144 30 0 28 1 0 1 1 0 8 0 amappl9 136 398 0 396 1 0 1 1 0 8 0 amappl8 128 363 0 361 2 0 2 2 0 8 1 amappl7 120 119 0 110 1 0 1 1 0 8 0 amappl6 112 193 0 193 1 0 1 1 0 8 1 amappl5 104 474 0 456 1 0 1 1 0 8 0 amappl4 96 493 0 464 1 0 1 1 0 8 0 amappl3 88 281 0 276 1 0 1 1 0 8 0 amappl2 80 3642 0 3584 2 0 2 2 0 8 0 amappl1 72 22460 0 22028 23 13 10 18 0 8 0 amappl 80 1631 0 1603 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 24 0 2 1 0 1 1 0 8 0 uaddrrnd 24 581 0 564 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 581 0 564 1 0 1 1 0 8 0 vmmpekpl 168 8194 0 8161 2 0 2 2 0 8 0 vmmpepl 168 76446 0 75460 104 13 91 100 0 357 31 vmsppl 368 580 0 564 2 0 2 2 0 8 0 pdppl 4096 1170 0 1131 6 0 6 6 0 8 0 pvpl 32 227068 0 223915 178 5 173 178 0 265 114 pmappl 232 580 0 564 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 267 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(ffffffff824e6ff0) 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(ffffffff82686100) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82686100) at __mp_lock+0x127 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82686100,2) 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(ffff800020ea6cf0,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020ea6cf0,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020ea6cf0,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff8264e224,118,ffffffff822495e3,41d64d) at tsleep+0x1cc sys/kern/kern_synch.c:155 doppoll(ffff800020e6d388,7f7ffffe1130,3,ffff800020ea6e88,0,ffff800020ea6f40) at doppoll+0x57e sys/kern/sys_generic.c:968 sys_poll(ffff800020e6d388,ffff800020ea6ef0,ffff800020ea6f40) at sys_poll+0xa6 syscall(ffff800020ea6fc0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ea6fc0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe1110, count: -13 ddb{0}> machine ddbcpu 1 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> trace in_delmulti(7fffffffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a49400) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000a29000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000a29000) at if_detach+0x140 sys/net/if.c:1149 tun_clone_destroy(ffff800000a29000) at tun_clone_destroy+0x1f2 sys/net/if_tun.c:329 tun_dev_close(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:480 spec_close(ffff800020f8b390) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd8079e63008,7,fffffd807f7bf9c0,ffff800020e6dad8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd8068824998,ffff800020e6dad8) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8068824998,ffff800020e6dad8) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8068824998,ffff800020e6dad8) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8068824998,ffff800020e6dad8) at closef+0x11c sys/kern/kern_descrip.c:1260 fdfree(ffff800020e6dad8) at fdfree+0x101 sys/kern/kern_descrip.c:1192 exit1(ffff800020e6dad8,0,d,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff800020e6dad8,d) at postsig+0x4ed sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff800020e6dad8,d) at postsig+0x4ed sys/kern/kern_sig.c:1415 userret(ffff800020e6dad8) at userret+0x199 sys/kern/kern_sig.c:1867 syscall(ffff800020f8b810) at syscall+0x55f mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff800020f8b810) at syscall+0x55f sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbb970, count: -17