Commit f54aa97f authored by Jan Kara's avatar Jan Kara
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udf: Fix off-by-one error when discarding preallocation 



The condition determining whether the preallocation can be used had
an off-by-one error so we didn't discard preallocation when new
allocation was just following it. This can then confuse code in
inode_getblk().

CC: stable@vger.kernel.org
Fixes: 16d05565 ("udf: Discard preallocation before extending file with a hole")
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent 36ec52ea

fs/udf/inode.c

+1 −1
Original line number Diff line number Diff line
@@ -361,7 +361,7 @@ static int udf_map_block(struct inode *inode, struct udf_map_rq *map) 
	 * Block beyond EOF and prealloc extents? Just discard preallocation

	 * as it is not useful and complicates things.

	 */

	if (((loff_t)map->lblk) << inode->i_blkbits > iinfo->i_lenExtents)

	if (((loff_t)map->lblk) << inode->i_blkbits >= iinfo->i_lenExtents)

		udf_discard_prealloc(inode);

	udf_clear_extent_cache(inode);

	err = inode_getblk(inode, map);