Re: [PATCH, STABLE 6.3.x] xfs: fix livelock in delayed allocation at ENOSPC

[Greg KH <gregkh@linuxfoundation.org>]

On Sun, May 28, 2023 at 08:19:40AM +1000, Dave Chinner wrote:
> Hi Greg,
> 
> A regression in 6.3.0 has been identified in XFS that causes
> filesystem corruption.  It has been seen in the wild by a number of
> users, and bisected down to an issued we'd already fixed in 6.4-rc1
> with commit:
> 
> 9419092fb263 ("xfs: fix livelock in delayed allocation at ENOSPC")
> 
> This was reported with much less harmful symptoms (alloctor
> livelock) and it wasn't realised that it could have other, more
> impactful symptoms. A reproducer for the corruption was found
> yesterday and, soon after than, the cause of the corruption reports
> was identified.
> 
> The commit applies cleanly to a 6.3.0 kernel here, so it should also
> apply cleanly to a current 6.3.x kernel. I've included the entire
> commit below in case that's easier for you.
> 
> Can you please pull this commit into the next 6.3.x release as a
> matter of priority?

Now queued up, thanks.

greg k-h