linux-kernel - [PATCH 1/5] mm: kmsan: export kmsan_copy_page

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20221024212144.2852069-1-glider@google.com>
Date:   Mon, 24 Oct 2022 23:21:40 +0200
From:   Alexander Potapenko <glider@...gle.com>
To:     glider@...gle.com
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 1/5] mm: kmsan: export kmsan_copy_page_meta()

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

Cc: Andrew Morton <akpm@...ux-foundation.org>
Fixes: b073d7f8aee4 ("mm: kmsan: maintain KMSAN metadata for page operations")
Link: https://github.com/google/kmsan/issues/89
Signed-off-by: Alexander Potapenko <glider@...gle.com>
---
 mm/kmsan/shadow.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/kmsan/shadow.c b/mm/kmsan/shadow.c
index 21e3e196ec3cf..a787c04e9583c 100644
--- a/mm/kmsan/shadow.c
+++ b/mm/kmsan/shadow.c
@@ -167,6 +167,7 @@ void kmsan_copy_page_meta(struct page *dst, struct page *src)
 	__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)
 {
-- 
2.38.0.135.g90850a2211-goog