linux-kernel - Re: [PATCH][for stable 5.{15, 10} 0/4] ext4: Fix kernel BUG in ext4_free

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Date:   Wed, 15 Mar 2023 09:17:34 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Tudor Ambarus <tudor.ambarus@...aro.org>
Cc:     stable@...r.kernel.org, tytso@....edu, adilger.kernel@...ger.ca,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        joneslee@...gle.com
Subject: Re: [PATCH][for stable 5.{15, 10} 0/4] ext4: Fix kernel BUG in
 ext4_free_blocks

On Thu, Mar 02, 2023 at 03:36:06PM +0000, Tudor Ambarus wrote:
> Hi,
> 
> This patch set is intended for stable/linux-5.{15, 10}.y. The patches
> applied cleanly without deviations from the original upstream patches.
> The last patch is fixing the bug reported at [1]. The other three are
> prerequisites for the last commit. I tested the patches and I confirm
> that the reproducer no longer complains on linux-5.{15, 10}.y. Older
> LTS kernels have more dependencies, let's fix these until I sort out
> what else should be backported for the older LTS kernels.
> 
> [1] LINK: https://syzkaller.appspot.com/bug?id=5266d464285a03cee9dbfda7d2452a72c3c2ae7c 
> 
> Cheers,
> ta
> 
> Lukas Czerner (1):
>   ext4: block range must be validated before use in ext4_mb_clear_bb()
> 
> Ritesh Harjani (3):
>   ext4: refactor ext4_free_blocks() to pull out ext4_mb_clear_bb()
>   ext4: add ext4_sb_block_valid() refactored out of
>     ext4_inode_block_valid()
>   ext4: add strict range checks while freeing blocks
> 
>  fs/ext4/block_validity.c |  26 +++--
>  fs/ext4/ext4.h           |   3 +
>  fs/ext4/mballoc.c        | 205 +++++++++++++++++++++++----------------
>  3 files changed, 139 insertions(+), 95 deletions(-)

Now queued up, thanks.

greg k-h