Commit d2d9bb3b authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: get out of a repeat loop when getting a locked data page 

https://bugzilla.kernel.org/show_bug.cgi?id=216050



Somehow we're getting a page which has a different mapping.
Let's avoid the infinite loop.

Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent a3ab5574

fs/f2fs/data.c

+2 −6
Original line number Diff line number Diff line
@@ -1389,18 +1389,14 @@ struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index, 
{

	struct address_space *mapping = inode->i_mapping;

	struct page *page;

repeat:



	page = f2fs_get_read_data_page(inode, index, 0, for_write, NULL);

	if (IS_ERR(page))

		return page;



	/* wait for read completion */

	lock_page(page);

	if (unlikely(page->mapping != mapping)) {

		f2fs_put_page(page, 1);

		goto repeat;

	}

	if (unlikely(!PageUptodate(page))) {

	if (unlikely(page->mapping != mapping || !PageUptodate(page))) {

		f2fs_put_page(page, 1);

		return ERR_PTR(-EIO);

	}