Commit 6fdef6d4 authored Jun 05, 2014 by Filipe Manana Committed by Chris Mason Jun 09, 2014

Btrfs: don't release invalid page in btrfs_page_exists_in_range()



In inode.c:btrfs_page_exists_in_range(), if the page we got from
the radix tree is an exception entry, which can't be retried, we
exit the loop with a non-NULL page and then call page_cache_release
against it, which is not ok since it's not a valid page. This could
also make us return true when we shouldn't.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>

parent 809f9016

fs/btrfs/inode.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -6776,6 +6776,7 @@ bool btrfs_page_exists_in_range(struct inode *inode, loff_t start, loff_t end)
		* here as an exceptional entry: so return it without
		* attempting to raise page count.
		*/
		page = NULL;
		break; /* TODO: Is this relevant for this use case? */
		}