linux-ext4 - Re: [PATCH] ext4: Avoid writing unitialized memory to disk in EA inodes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <172066485816.400039.12241862277216436676.b4-ty@mit.edu>
Date: Wed, 10 Jul 2024 22:35:27 -0400
From: "Theodore Ts'o" <tytso@....edu>
To: Jan Kara <jack@...e.cz>
Cc: "Theodore Ts'o" <tytso@....edu>, linux-ext4@...r.kernel.org,
        syzbot+9c1fe13fcb51574b249b@...kaller.appspotmail.com,
        Hugh Dickins <hughd@...gle.com>
Subject: Re: [PATCH] ext4: Avoid writing unitialized memory to disk in EA inodes


On Thu, 13 Jun 2024 17:02:34 +0200, Jan Kara wrote:
> If the extended attribute size is not a multiple of block size, the last
> block in the EA inode will have uninitialized tail which will get
> written to disk. We will never expose the data to userspace but still
> this is not a good practice so just zero out the tail of the block as it
> isn't going to cause a noticeable performance overhead.
> 
> 
> [...]

Applied, thanks!

[1/1] ext4: Avoid writing unitialized memory to disk in EA inodes
      commit: 65121eff3e4c8c90f8126debf3c369228691c591

Best regards,
-- 
Theodore Ts'o <tytso@....edu>