linux-kernel - Re: [PATCH 5.15.y] jfs: define xtree root and page independently

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Message-ID: <2025042210-stylized-nearest-ea59@gregkh>
Date: Tue, 22 Apr 2025 15:28:49 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Aditya Dutt <duttaditya18@...il.com>
Cc: stable@...r.kernel.org, Dave Kleikamp <dave.kleikamp@...cle.com>,
	Dave Kleikamp <shaggy@...nel.org>, linux-kernel@...r.kernel.org,
	linux-kernel-mentees@...ts.linux.dev,
	jfs-discussion@...ts.sourceforge.net, skhan@...uxfoundation.org,
	Manas Ghandat <ghandatmanas@...il.com>
Subject: Re: [PATCH 5.15.y] jfs: define xtree root and page independently

On Tue, Apr 15, 2025 at 11:39:39PM +0530, Aditya Dutt wrote:
> From: Dave Kleikamp <dave.kleikamp@...cle.com>
> 
> [ Upstream commit a779ed754e52d582b8c0e17959df063108bd0656 ]
> 
> In order to make array bounds checking sane, provide a separate
> definition of the in-inode xtree root and the external xtree page.
> 
> Signed-off-by: Dave Kleikamp <dave.kleikamp@...cle.com>
> Tested-by: Manas Ghandat <ghandatmanas@...il.com>
> (cherry picked from commit a779ed754e52d582b8c0e17959df063108bd0656)
> Closes: https://syzkaller.appspot.com/bug?extid=ccb458b6679845ee0bae
> Signed-off-by: Aditya Dutt <duttaditya18@...il.com>
> ---
> Tested using C reproducer here: https://syzkaller.appspot.com/x/repro.c?x=113bb250e80000
> (given in the dashboard link above
> UBSAN is not triggered when this commit is there.
> It is triggered when it is not.

Please always submit backports for all relevant stable trees.  We can't
take this one until the newer trees are fixed.

Please resubmit all ones needed.

thanks,

greg k-h