[PATCH] ext4: fix kernel infoleak via ext4_extent_header

Anirudh Rayabharam mail at anirudhrb.com
Thu May 6 18:58:35 UTC 2021


On Wed, May 05, 2021 at 09:19:44AM -0700, Eric Biggers wrote:
> On Wed, May 05, 2021 at 07:00:10PM +0530, Anirudh Rayabharam wrote:
> > Initialize eh_generation of struct ext4_extent_header to prevent leaking
> > info to userspace. Fixes KMSAN kernel-infoleak bug reported by syzbot at:
> > http://syzkaller.appspot.com/bug?id=78e9ad0e6952a3ca16e8234724b2fa92d041b9b8
> > 
> > Reported-by: syzbot+2dcfeaf8cb49b05e8f1a at syzkaller.appspotmail.com
> > Signed-off-by: Anirudh Rayabharam <mail at anirudhrb.com>
> 
> Can you include a "Fixes:" tag?

Sent v2!

Thanks!

	- Anirudh.

> 
> - Eric


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