+ kernel-fork-convert-vma-assignment-to-a-memcpy-fix.patch added to mm-unstable branch

+ kernel-fork-convert-vma-assignment-to-a-memcpy-fix.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: kernel-fork-convert-vma-assignment-to-a-memcpy-fix
has been added to the -mm mm-unstable branch.  Its filename is
     kernel-fork-convert-vma-assignment-to-a-memcpy-fix.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kernel-fork-convert-vma-assignment-to-a-memcpy-fix.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Mel Gorman <mgorman@techsingularity.net>
Subject: kernel-fork-convert-vma-assignment-to-a-memcpy-fix
Date: Thu, 26 Jan 2023 11:52:24 +0000

preserve data_race()

Link: https://lkml.kernel.org/r/20230126115224.3urhskf35eomk7xl@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/fork.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/fork.c~kernel-fork-convert-vma-assignment-to-a-memcpy-fix
+++ a/kernel/fork.c
@@ -472,7 +472,7 @@ struct vm_area_struct *vm_area_dup(struc
 		 * orig->shared.rb may be modified concurrently, but the clone
 		 * will be reinitialized.
 		 */
-		memcpy(new, orig, sizeof(*new));
+		data_race(memcpy(new, orig, sizeof(*new)));
 		INIT_LIST_HEAD(&new->anon_vma_chain);
 		dup_anon_vma_name(orig, new);
 	}
_

Patches currently in -mm which might be from mgorman@techsingularity.net are

mm-page_alloc-rename-alloc_high-to-alloc_min_reserve.patch
mm-page_alloc-treat-rt-tasks-similar-to-__gfp_high.patch
mm-page_alloc-explicitly-record-high-order-atomic-allocations-in-alloc_flags.patch
mm-page_alloc-explicitly-define-what-alloc-flags-deplete-min-reserves.patch
mm-page_alloc-explicitly-define-how-__gfp_high-non-blocking-allocations-accesses-reserves.patch
kernel-fork-convert-vma-assignment-to-a-memcpy-fix.patch
mm-compaction-rename-compact_control-rescan-to-finish_pageblock.patch
mm-compaction-check-if-a-page-has-been-captured-before-draining-pcp-pages.patch
mm-compaction-finish-scanning-the-current-pageblock-if-requested.patch
mm-compaction-finish-pageblocks-on-complete-migration-failure.patch