+ mm-kmsan-export-kmsan_copy_page_meta.patch added to mm-hotfixes-unstable branch

+ mm-kmsan-export-kmsan_copy_page_meta.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm: kmsan: export kmsan_copy_page_meta()
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mm-kmsan-export-kmsan_copy_page_meta.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-kmsan-export-kmsan_copy_page_meta.patch

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

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------------------------------------------------------
From: Alexander Potapenko <glider@google.com>
Subject: mm: kmsan: export kmsan_copy_page_meta()
Date: Mon, 24 Oct 2022 23:21:40 +0200

Certain modules call copy_user_highpage(), which calls
kmsan_copy_page_meta() under KMSAN, so we need to export the latter.

Link: https://lkml.kernel.org/r/20221024212144.2852069-1-glider@google.com
Link: https://github.com/google/kmsan/issues/89
Fixes: b073d7f8aee4 ("mm: kmsan: maintain KMSAN metadata for page operations")
Signed-off-by: Alexander Potapenko <glider@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/kmsan/shadow.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/kmsan/shadow.c~mm-kmsan-export-kmsan_copy_page_meta
+++ a/mm/kmsan/shadow.c
@@ -167,6 +167,7 @@ void kmsan_copy_page_meta(struct page *d
 	__memcpy(origin_ptr_for(dst), origin_ptr_for(src), PAGE_SIZE);
 	kmsan_leave_runtime();
 }
+EXPORT_SYMBOL(kmsan_copy_page_meta);
 
 void kmsan_alloc_page(struct page *page, unsigned int order, gfp_t flags)
 {
_

Patches currently in -mm which might be from glider@google.com are

mm-kmsan-export-kmsan_copy_page_meta.patch
x86-purgatory-disable-kmsan-instrumentation.patch
kconfigdebug-disable-config_frame_warn-for-kmsan-by-default.patch
x86-asm-make-sure-__put_user_size-evaluates-pointer-once.patch
x86-fortify-kmsan-fix-kmsan-fortify-builds.patch