Re: [PATCH 6.7 001/162] btrfs: fix deadlock with fiemap and extent locking

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On 11.03.24 19:41, David Sterba wrote:
> On Mon, Mar 11, 2024 at 10:15:31AM +0100, Linux regression tracking (Thorsten Leemhuis) wrote:
>> On 06.03.24 13:39, Filipe Manana wrote:
>>> On Mon, Mar 4, 2024 at 9:26 PM Greg Kroah-Hartman
>>> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>>>>
>>>> 6.7-stable review patch.  If anyone has any objections, please let me know.
>>>
>>> It would be better to delay the backport of this patch (and the
>>> followup fix) to any stable release, because it introduced another
>>> regression for which there is a reviewed fix but it's not yet in
>>> Linus' tree:
>>>
>>> https://lore.kernel.org/linux-btrfs/cover.1709202499.git.fdmanana@xxxxxxxx/
>>
>> Those two missed 6.8 afaics. Will those be heading to mainline any time
>> soon?
> 
> Yes, in the 6.9 pull request.

Great!

>> And how fast afterwards will it be wise to backport them to 6.8?
>> Will anyone ask Greg for that when the time has come?
> The commits have stable tags and will be processed in the usual way.

I'm missing something. The first change from Filipe's series linked
above has a fixes tag, but no stable tag afaics:
https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git/commit/?h=for-6.9&id=978b63f7464abcfd364a6c95f734282c50f3decf

So there is no guarantee that Greg will pick it up; and I assume if he
does he only will do so after -rc1 (or later, if the CVE stuff continues
to keep him busy). As Filipe wrote "can actually have serious
consequences" this got me slightly worried. That's why I'm a PITA here,
sorry -- but as I said, maybe I'm missing something.

The second of the patches has none of those tags, but well, from the
patch descriptions it seems that is just a optimization, so that is
likely not something to worry about:
https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git/commit/?h=for-6.9&id=1cab1375ba6d5337a25acb346996106c12bb2dd0

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
--
Everything you wanna know about Linux kernel regression tracking:
https://linux-regtracking.leemhuis.info/about/#tldr
If I did something stupid, please tell me, as explained on that page.




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