panic: runtime error: floating point error
[signal SIGFPE: floating-point exception code=0x80 addr=0x0 pc=0x50cce1]

goroutine 27 [running]:
github.com/google/syzkaller/prog.(*GroupArg).Size(0xc0099732a0)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:234 +0x301
github.com/google/syzkaller/prog.(*GroupArg).Size(0xc009e5dea0)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:246 +0x1ce
github.com/google/syzkaller/prog.(*GroupArg).Size(0xc009e5dec0)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:231 +0x2aa
github.com/google/syzkaller/prog.(*UnionArg).Size(0xc009e5dee0)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:280 +0x142
github.com/google/syzkaller/prog.(*GroupArg).Size(0xc009e5df00)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:246 +0x1ce
github.com/google/syzkaller/prog.foreachArgImpl({0x8ac618, 0xc009e5df00}, 0xc00add6b80, 0xc00e7fd868)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:153 +0x387
github.com/google/syzkaller/prog.foreachArgImpl({0x8ac618, 0xc009e5df20}, 0xc00add6b80, 0xc00e7fd868)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:146 +0x6ae
github.com/google/syzkaller/prog.foreachArgImpl({0x8ac658, 0xc0017bd500}, 0xc00add6b80, 0xc00e7fd868)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:163 +0x337
github.com/google/syzkaller/prog.foreachArgImpl({0x8ac618, 0xc009e5df40}, 0xc00add6b80, 0xc00e7fd868)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:146 +0x6ae
github.com/google/syzkaller/prog.foreachArgImpl({0x8ac658, 0xc0017bd530}, 0xc00add6b80, 0xc00e7fd868)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:163 +0x337
github.com/google/syzkaller/prog.foreachArgImpl({0x8ac618, 0xc009e5dfa0}, 0xc00add6b80, 0xc00e7fd868)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:146 +0x6ae
github.com/google/syzkaller/prog.foreachArgImpl({0x8ac658, 0xc0017bd560}, 0xc00add6b80, 0xc00e7fd868)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:163 +0x337
github.com/google/syzkaller/prog.ForeachArg(0xc0054ccaa0, 0x0)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:122 +0x105
github.com/google/syzkaller/prog.(*execContext).writeCopyout(0xc00e7fd970, 0x8ac598)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encodingexec.go:231 +0x38
github.com/google/syzkaller/prog.(*execContext).serializeCall(0xc00e7fd970, 0xc0054ccaa0)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encodingexec.go:114 +0x21b
github.com/google/syzkaller/prog.(*Prog).SerializeForExec(0xc00b8d1700, {0x7f37bc57b000, 0x400000, 0x400000})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encodingexec.go:76 +0x188
github.com/google/syzkaller/pkg/ipc.(*Env).Exec(0xc00b944240, 0x40, 0xc00b8d1700)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/ipc/ipc.go:256 +0x57
main.(*Proc).executeRaw(0xc00a99e300, 0xc00b8d1700, 0xc00d09e080, 0x1)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:321 +0x1bc
main.(*Proc).execute(0xc00a99e300, 0xc00b8c4720, 0x0, 0xc00a99e180, 0xc008b40000)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:255 +0x49
main.(*Proc).executeAndCollide(0xc00a99e300, 0x6ceb99, 0xc, 0xc00e7fdf38, 0x1)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:284 +0x27
main.(*Proc).loop(0xc00a99e300)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:97 +0x3e5
created by main.main
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:300 +0x157d