Re: [RFC PATCH v6.6 00/10] Address CVE-2024-46701

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On Wed, Jan 29, 2025 at 10:06:49AM -0500, Chuck Lever wrote:
> On 1/29/25 9:50 AM, Greg Kroah-Hartman wrote:
> > On Wed, Jan 29, 2025 at 08:55:15AM -0500, Chuck Lever wrote:
> > > On 1/24/25 2:19 PM, cel@xxxxxxxxxx wrote:
> > > > From: Chuck Lever <chuck.lever@xxxxxxxxxx>
> > > > 
> > > > This series backports several upstream fixes to origin/linux-6.6.y
> > > > in order to address CVE-2024-46701:
> > > > 
> > > >     https://nvd.nist.gov/vuln/detail/CVE-2024-46701
> > > > 
> > > > As applied to origin/linux-6.6.y, this series passes fstests and the
> > > > git regression suite.
> > > > 
> > > > Before officially requesting that stable@ merge this series, I'd
> > > > like to provide an opportunity for community review of the backport
> > > > patches.
> > > > 
> > > > You can also find them them in the "nfsd-6.6.y" branch in
> > > > 
> > > >     https://git.kernel.org/pub/scm/linux/kernel/git/cel/linux.git
> > > > 
> > > > Chuck Lever (10):
> > > >     libfs: Re-arrange locking in offset_iterate_dir()
> > > >     libfs: Define a minimum directory offset
> > > >     libfs: Add simple_offset_empty()
> > > >     libfs: Fix simple_offset_rename_exchange()
> > > >     libfs: Add simple_offset_rename() API
> > > >     shmem: Fix shmem_rename2()
> > > >     libfs: Return ENOSPC when the directory offset range is exhausted
> > > >     Revert "libfs: Add simple_offset_empty()"
> > > >     libfs: Replace simple_offset end-of-directory detection
> > > >     libfs: Use d_children list to iterate simple_offset directories
> > > > 
> > > >    fs/libfs.c         | 177 +++++++++++++++++++++++++++++++++------------
> > > >    include/linux/fs.h |   2 +
> > > >    mm/shmem.c         |   3 +-
> > > >    3 files changed, 134 insertions(+), 48 deletions(-)
> > > > 
> > > 
> > > I've heard no objections or other comments. Greg, Sasha, shall we
> > > proceed with merging this patch series into v6.6 ?
> > 
> > Um, but not all of these are in a released kernel yet, so we can't take
> > them all yet.
> 
> Hi Greg -
> 
> The new patches are in v6.14 now. I'm asking stable to take these
> whenever you are ready. Would that be v6.14-rc1? I can send a reminder
> if you like.

Yes, we have to wait until changes are in a -rc release unless there are
"real reasons to take it now" :)

> > Also what about 6.12.y and 6.13.y for those commits that
> > will be showing up in 6.14-rc1?  We can't have regressions for people
> > moving to those releases from 6.6.y, right?
> 
> The upstream commits have Fixes tags. I assumed that your automation
> will find those and apply them to those kernels -- the upstream versions
> of these patches I expect will apply cleanly to recent LTS.

"Fixes:" are never guaranteed to show up in stable kernels, they are
only a "maybe when we get some spare cycles and get around to it we
might do a simple pass to see what works or doesn't."

If you KNOW a change is a bugfix for stable kernels, please mark it as
such!  "Fixes:" is NOT how to do that, and never has been.  It's only
additional meta-data that helps us out.

So please send us a list of the commits that need to go to 6.12.y and
6.13.y, we have to have that before we could take the 6.6.y changes.

thanks,

greg k-h




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