syz_mount_image$vfat(&(0x7f0000000080), &(0x7f0000000940)='./file0\x00', 0x8100000, 0x0, &(0x7f00000000c0), 0x0, &(0x7f00000002c0)={[{@numtail}, {@uni_xlateno}, {@uni_xlateno}, {@numtail}, {@utf8}, {@shortname_mixed}, {@iocharset={'iocharset', 0x3d, 'utf8'}}, {@utf8no}, {@utf8no}]}, 0x0)
panic: bad group arg size 24, should be <= 0 for &prog.GroupArg{ArgCommon:prog.ArgCommon{ref:0x2de, dir:0x0}, Inner:[]prog.Arg{}} type "array"

goroutine 9 [running]:
github.com/google/syzkaller/prog.foreachArgImpl({0x8b4538, 0xc00ff7f440}, 0xc00c962880, 0xc00738fd00)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:157 +0x5d9
github.com/google/syzkaller/prog.foreachArgImpl({0x8b4578, 0xc00cb741b0}, 0xc00c962880, 0xc00738fd00)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:164 +0x337
github.com/google/syzkaller/prog.ForeachArg(0xc00c7479f0, 0x0)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:123 +0x105
github.com/google/syzkaller/prog.(*Prog).MutateWithHints(0xc0145b6380, 0x0, 0xc00c9469f0, 0xc00738fd80)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/hints.go:78 +0xaa
main.(*Proc).executeHintSeed(0xc0145b6380, 0x742, 0x0)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:248 +0xd2
main.(*Proc).smashInput(0xc0145b6380, 0xc012053a20)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:214 +0x88
main.(*Proc).loop(0xc0145b6380)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:78 +0x125
created by main.main
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:307 +0x15a5