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,
