On Mon, Feb 22, 2021 at 11:06:43AM +0100, Daniel Vetter wrote: > Some of them have gaps, or fields we don't clear. Native ioctl code > does full copies plus zero-extends on size mismatch, so nothing can > leak. But compat is more hand-rolled so need to be careful. > > None of these matter for performance, so just memset. > > Also I didn't fix up the CONFIG_DRM_LEGACY or CONFIG_DRM_AGP ioctl, those > are security holes anyway. > > Reported-by: syzbot+620cf21140fc7e772a5d@xxxxxxxxxxxxxxxxxxxxxxxxx # vblank ioctl > Cc: syzbot+620cf21140fc7e772a5d@xxxxxxxxxxxxxxxxxxxxxxxxx > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx> Acked-by: Maxime Ripard <mripard@xxxxxxxxxx> Maxime
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