[PATCH 5.10 438/529] fs: f2fs: initialize fsdata in pagecache_write()

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From: Alexander Potapenko <glider@xxxxxxxxxx>

[ 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>
---
 fs/f2fs/verity.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/f2fs/verity.c b/fs/f2fs/verity.c
index dafdb19ec0dba..cef40d92268f7 100644
--- a/fs/f2fs/verity.c
+++ b/fs/f2fs/verity.c
@@ -78,7 +78,7 @@ 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,
-- 
2.39.2






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