On Mon, Nov 27, 2023 at 12:59 PM Catalin Marinas catalin.marinas@arm.com wrote:
On Fri, Nov 24, 2023 at 04:10:25PM +0100, Helge Deller wrote:
On 11/24/23 12:35, gregkh@linuxfoundation.org wrote:
The patch below does not apply to the 6.5-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.5.y git checkout FETCH_HEAD git cherry-pick -x 793838138c157d4c49f4fb744b170747e3dabf58 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2023112456-linked-nape-bf19@gregkh' --subject-prefix 'PATCH 6.5.y' HEAD^..
Possible dependencies:
793838138c15 ("prctl: Disable prctl(PR_SET_MDWE) on parisc") 24e41bf8a6b4 ("mm: add a NO_INHERIT flag to the PR_SET_MDWE prctl") 0da668333fb0 ("mm: make PR_MDWE_REFUSE_EXEC_GAIN an unsigned long")
Greg, I think the most clean solution is that you pull in this patch:
commit 24e41bf8a6b424c76c5902fb999e9eca61bdf83d Author: Florent Revest revest@chromium.org Date: Mon Aug 28 17:08:57 2023 +0200 mm: add a NO_INHERIT flag to the PR_SET_MDWE prctl
as well into 6.5-stable and 6.6-stable prior to applying my patch.
Florent, Kees and Catalin, do you see any issues if this patch ("mm: add a NO_INHERIT flag to the PR_SET_MDWE prctl") is backported to 6.5 and 6.6 too? If yes, I'm happy to just send the trivial backport of my patch below...
TBH, given that the NO_INHERIT MDWE is a new feature and it took us a few rounds to define its semantics, I'd rather not back-port it unless someone has a strong need for it in 6.5 (not sure the stable rules even allow for this). The parisc patch is simple enough to be backported on its own.
I agree with Catalin :)