Florent Revest b3759b8705 mm: make PR_MDWE_REFUSE_EXEC_GAIN an unsigned long ... commit 0da668333f upstream. Defining a prctl flag as an int is a footgun because on a 64 bit machine and with a variadic implementation of prctl (like in musl and glibc), when used directly as a prctl argument, it can get casted to long with garbage upper bits which would result in unexpected behaviors. This patch changes the constant to an unsigned long to eliminate that possibilities. This does not break UAPI. I think that a stable backport would be "nice to have": to reduce the chances that users build binaries that could end up with garbage bits in their MDWE prctl arguments. We are not aware of anyone having yet encountered this corner case with MDWE prctls but a backport would reduce the likelihood it happens, since this sort of issues has happened with other prctls. But If this is perceived as a backporting burden, I suppose we could also live without a stable backport. Link: https://lkml.kernel.org/r/20230828150858.393570-5-revest@chromium.org Fixes: b507808ebc ("mm: implement memory-deny-write-execute as a prctl") Signed-off-by: Florent Revest <revest@chromium.org> Suggested-by: Alexey Izbyshev <izbyshev@ispras.ru> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Ayush Jain <ayush.jain3@amd.com> Cc: Greg Thelen <gthelen@google.com> Cc: Joey Gouly <joey.gouly@arm.com> Cc: KP Singh <kpsingh@kernel.org> Cc: Mark Brown <broonie@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Peter Xu <peterx@redhat.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Szabolcs Nagy <Szabolcs.Nagy@arm.com> Cc: Topi Miettinen <toiwoton@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-11-28 17:15:08 +00:00
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asm-generic	asm-generic updates for 6.5	2023-07-06 10:06:04 -07:00
drm	Merge tag 'amd-drm-next-6.5-2023-06-09' of https://gitlab.freedesktop.org/agd5f/linux into drm-next	2023-06-15 14:11:22 +10:00
linux	mm: make PR_MDWE_REFUSE_EXEC_GAIN an unsigned long	2023-11-28 17:15:08 +00:00
misc	habanalabs/uapi: move uapi file to drm	2023-01-26 10:56:23 +02:00
mtd	This pull request contains updates for UBI and UBIFS	2022-10-14 18:23:23 -07:00
rdma	RDMA/bnxt_re: Enable low latency push	2023-06-21 14:13:17 -03:00
scsi	scsi: ufs: core: Add support for qTimestamp attribute	2023-07-05 21:44:07 -04:00
sound	Merge branch 'for-next' into for-linus	2023-06-26 15:23:23 +02:00
video
xen	xen/evtchn: Introduce new IOCTL to bind static evtchn	2023-07-26 08:42:34 +02:00
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