image/jpeg: invalid memory address or nil pointer dereference
dvyukov opened this issue · 0 comments
dvyukov commented
Run the following program on the following input:
package main
import (
"bytes"
"image/jpeg"
"io/ioutil"
"os"
)
func main() {
data, _ := ioutil.ReadFile(os.Args[1])
img, err := jpeg.Decode(bytes.NewReader(data))
if err != nil {
return
}
var w bytes.Buffer
err = jpeg.Encode(&w, img, nil)
if err != nil {
panic(err)
}
}
https://drive.google.com/file/d/0B20Uwp8Hs1oCbTJPZW9zTXlORmM/view?usp=sharing
It crashes with:
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x18 pc=0x4566cc]
goroutine 1 [running]:
runtime.gopanic(0x4b2ac0, 0xc20800e260)
src/runtime/panic.go:477 +0x3fe fp=0xc208041a70 sp=0xc2080419f0
runtime.panicmem()
src/runtime/panic.go:42 +0x52 fp=0xc208041a98 sp=0xc208041a70
runtime.sigpanic()
src/runtime/sigpanic_unix.go:24 +0x2bf fp=0xc208041ae8 sp=0xc208041a98
image/jpeg.(*decoder).processSOS(0xc208076000, 0x6, 0x0, 0x0)
src/image/jpeg/scan.go:308 +0x11cc fp=0xc208041de8 sp=0xc208041ae8
image/jpeg.(*decoder).decode(0xc208076000, 0x7fd68274a1c0, 0xc208014450, 0x574300, 0x0, 0x0, 0x0, 0x0)
src/image/jpeg/reader.go:619 +0xa4e fp=0xc208041e88 sp=0xc208041de8
image/jpeg.Decode(0x7fd68274a1c0, 0xc208014450, 0x0, 0x0, 0x0, 0x0)
src/image/jpeg/reader.go:762 +0x69 fp=0xc208041ed0 sp=0xc208041e88
main.main()
jpeg.go:12 +0x132 fp=0xc208041f90 sp=0xc208041ed0
My repository is on commit 8ac129e.