Re: [PATCH] zero-fill colormap in drivers/video/fbdev/core/fbcmap.c

On Wed, Mar 31, 2021 at 11:07:19PM +0100, Phillip Potter wrote:

Use kzalloc() rather than kmalloc() for the dynamically allocated parts of the colormap in fb_alloc_cmap_gfp, to prevent a leak of random kernel data to userspace under certain circumstances.

Fixes a KMSAN-found infoleak bug reported by syzbot at: https://syzkaller.appspot.com/bug?id=741578659feabd108ad9e06696f0c1f2e69c4b6...

Reported-by: syzbot+47fa9c9c648b765305b9@syzkaller.appspotmail.com Signed-off-by: Phillip Potter phil@philpotter.co.uk

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drivers/video/fbdev/core/fbcmap.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)

Daniel, want me to take this?

thanks,

greg k-h