panic: runtime error: index out of range [300252880] with length 992 goroutine 68 [running]: github.com/google/syzkaller/prog.ArgCommon.Type(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:61 github.com/google/syzkaller/prog.(*GroupArg).serialize(0xc001c94e40, 0xc00158d770) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:193 +0x1ab github.com/google/syzkaller/prog.(*serializer).arg(0xc99998?, {0xc998d8?, 0xc001c94e40?}) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:121 +0x29 github.com/google/syzkaller/prog.(*GroupArg).serialize(0xc001c94e20, 0xc00158d770) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:199 +0x245 github.com/google/syzkaller/prog.(*serializer).arg(0xc91180?, {0xc998d8?, 0xc001c94e20?}) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:121 +0x29 github.com/google/syzkaller/prog.(*PointerArg).serialize(0xc001fc9f20, 0xc00158d770) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:142 +0x3a5 github.com/google/syzkaller/prog.(*serializer).arg(0xc91180?, {0xc999d8?, 0xc001fc9f20?}) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:121 +0x29 github.com/google/syzkaller/prog.(*serializer).call(0xc00158d770, 0xc001ff7630) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:82 +0x211 github.com/google/syzkaller/prog.(*Prog).serialize(0xc001969640, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:46 +0xcd github.com/google/syzkaller/prog.(*Prog).Serialize(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:30 main.(*Proc).logProgram(0xc0011db980, 0xc91200?, 0xc?) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:367 +0x3e main.(*Proc).executeRaw(0xc0011db980, 0xc00199f0c0?, 0xc001969640, 0x8) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:336 +0x130 main.(*Proc).executeAndCollide(0xc0011db980, 0xb94f6e?, 0xc00140c9c0?, 0xc000e29f38?, 0xc001837580?) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:298 +0x6c main.(*Proc).loop(0xc0011db980) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:97 +0x3d7 created by main.main in goroutine 1 /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:336 +0x1665