linux-ext4 - Re: [PATCH 4/5] fs: hfs: initialize fsdata in hfs_file

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Date:   Wed, 25 Jan 2023 10:51:54 +0100
From:   Alexander Potapenko <glider@...gle.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.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,
        Eric Biggers <ebiggers@...nel.org>
Subject: Re: [PATCH 4/5] fs: hfs: initialize fsdata in hfs_file_truncate()

On Tue, Jan 24, 2023 at 10:04 PM Andrew Morton
<akpm@...ux-foundation.org> wrote:
>
> On Tue, 24 Jan 2023 11:51:30 +0100 Alexander Potapenko <glider@...gle.com> wrote:
>
> > On Mon, Nov 21, 2022 at 12:21 PM Alexander Potapenko <glider@...gle.com> 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")
> > > Signed-off-by: Alexander Potapenko <glider@...gle.com>
> >
> > Dear FS maintainers,
> >
> > HFS/HFSPLUS are orphaned, can someone take this patch to their tree?
> > Thanks in advance!
> > (same for "fs: hfsplus: initialize fsdata in hfsplus_file_truncate()":
> > https://lore.kernel.org/all/20221121112134.407362-5-glider@google.com/)
>
> I grabbed both.
>
> I removed the
>
>         Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
>
> because that might provoke the backport bots to backport this fix
> across eight years worth of kernels.  Before KMSAN existed!

Right, makes sense.