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=741578659feabd108ad9e06696f0c1f2e69c4b6e

Reported-by: syzbot+47fa9c9c648b765305b9@syzkaller.appspotmail.com
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
---
 drivers/video/fbdev/core/fbcmap.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Daniel, want me to take this?

thanks,

greg k-h