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fs: f2fs: initialize fsdata in pagecache_write()

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[ Upstream commit b1b9896718 ]

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@kernel.org>
Fixes: 95ae251fe8 ("f2fs: add fs-verity support")
Signed-off-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alexander Potapenko
2022-11-21 12:21:32 +01:00
committed by Greg Kroah-Hartman
parent 33909b1a64
commit 6be349d738
1 changed files with 1 additions and 1 deletions
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2
fs/f2fs/verity.c
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@@ -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, size_t n = min_t(size_t, count,
PAGE_SIZE - offset_in_page(pos)); PAGE_SIZE - offset_in_page(pos));
struct page *page; struct page *page;
void *fsdata; void *fsdata = NULL;
int res; int res;
res = pagecache_write_begin(NULL, inode->i_mapping, pos, n, 0, res = pagecache_write_begin(NULL, inode->i_mapping, pos, n, 0,