Patch "fs: f2fs: initialize fsdata in pagecache_write()" has been added to the 5.4-stable tree

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This is a note to let you know that I've just added the patch titled

    fs: f2fs: initialize fsdata in pagecache_write()

to the 5.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     fs-f2fs-initialize-fsdata-in-pagecache_write.patch
and it can be found in the queue-5.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 9f4bfef56e46b7d7e5915aea71cbdd4eea93993e
Author: Alexander Potapenko <glider@xxxxxxxxxx>
Date:   Mon Nov 21 12:21:32 2022 +0100

    fs: f2fs: initialize fsdata in pagecache_write()
    
    [ Upstream commit b1b9896718bc1a212dc288ad66a5fa2fef11353d ]
    
    When aops->write_begin() does not initialize fsdata, KMSAN may report
    an error passing the latter to aops->write_end().
    
    Fix this by unconditionally initializing fsdata.
    
    Suggested-by: Eric Biggers <ebiggers@xxxxxxxxxx>
    Fixes: 95ae251fe828 ("f2fs: add fs-verity support")
    Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx>
    Reviewed-by: Eric Biggers <ebiggers@xxxxxxxxxx>
    Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/f2fs/verity.c b/fs/f2fs/verity.c
index e5a47782a97ef..c4bd5a1542524 100644
--- a/fs/f2fs/verity.c
+++ b/fs/f2fs/verity.c
@@ -76,7 +76,7 @@ static int pagecache_write(struct inode *inode, const void *buf, size_t count,
 		size_t n = min_t(size_t, count,
 				 PAGE_SIZE - offset_in_page(pos));
 		struct page *page;
-		void *fsdata;
+		void *fsdata = NULL;
 		int res;
 
 		res = pagecache_write_begin(NULL, inode->i_mapping, pos, n, 0,



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