Btrfs: Fix extent_map leak in extent_bmap
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index c44989a..e4ee980 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -1924,6 +1924,7 @@
struct inode *inode = mapping->host;
u64 start = iblock << inode->i_blkbits;
u64 end = start + (1 << inode->i_blkbits) - 1;
+ sector_t sector = 0;
struct extent_map *em;
em = get_extent(inode, NULL, 0, start, end, 0);
@@ -1932,9 +1933,12 @@
if (em->block_start == EXTENT_MAP_INLINE ||
em->block_start == EXTENT_MAP_HOLE)
- return 0;
+ goto out;
- return (em->block_start + start - em->start) >> inode->i_blkbits;
+ sector = (em->block_start + start - em->start) >> inode->i_blkbits;
+out:
+ free_extent_map(em);
+ return sector;
}
static int add_lru(struct extent_map_tree *tree, struct extent_buffer *eb)