[wlug] Re: Wallpaper crash explained: Here’s how a simple image can soft-brick phones

On Tue, 2 Jun 2020 12:38:08 +1200, Peter Reutemann quoted:

'How can a simple image crash an Android phone to the point that it becomes unusable?'

You’d think it would be some nefarious convoluted image-encoding evil data block or something, but no, it’s just down to a system process that doesn’t properly handle an image with the wrong colour profile <https://www.theregister.com/2020/06/01/android_bricked_by_wallpaper/>. In trying to convert the pixel values to something outside the valid range, it hits an integer overflow and crashes.