[PATCH v2] ext4: fix kernel infoleak via ext4_extent_header

Theodore Ts'o tytso at mit.edu
Wed Jun 16 23:45:34 UTC 2021


On Fri, May 07, 2021 at 12:26:54AM +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
> Fixes: a86c61812637 ("[PATCH] ext3: add extent map support")
> Signed-off-by: Anirudh Rayabharam <mail at anirudhrb.com>

Applied, thanks.

					- Ted


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