linux-ext4 - Re: [PATCH 2/5] fs: affs: initialize fsdata in affs

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Message-ID: <CAG_fn=VA=ZDX4mLruDAMsMa1o11s7c9B9n3k7vohwFu2dpUmAA@mail.gmail.com>
Date:   Tue, 22 Nov 2022 09:57:57 +0100
From:   Alexander Potapenko <glider@...gle.com>
To:     Eric Biggers <ebiggers@...nel.org>
Cc:     linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
        tytso@....edu, adilger.kernel@...ger.ca, jaegeuk@...nel.org,
        chao@...nel.org, linux-fsdevel@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [PATCH 2/5] fs: affs: initialize fsdata in affs_truncate()

On Mon, Nov 21, 2022 at 8:46 PM Eric Biggers <ebiggers@...nel.org> wrote:
>
> On Mon, Nov 21, 2022 at 12:21:31PM +0100, Alexander Potapenko wrote:
> > When aops->write_begin() does not initialize fsdata, KMSAN may report
> > an error passing the latter to aops->write_end().
> >
> > Fix this by unconditionally initializing fsdata.
> >
> > Suggested-by: Eric Biggers <ebiggers@...nel.org>
> > Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
>
> Are you sure that is the correct Fixes commit?  What about commit f2b6a16eb8f5
> ("fs: affs convert to new aops")?

Hmm, indeed, you are right.

> - Eric



-- 
Alexander Potapenko
Software Engineer

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