diff --git a/fs/hfs/extent.c b/fs/hfs/extent.c
index 4a0ce131e..cee1b4504 100644
--- a/fs/hfs/extent.c
+++ b/fs/hfs/extent.c
@@ -154,6 +154,7 @@ static inline int __hfs_ext_read_extent(struct hfs_find_data *fd, struct hfs_ext
 
 	hfs_ext_build_key(fd->search_key, cnid, block, type);
 	fd->key->ext.FNum = 0;
+	memset(extent, 0, sizeof(struct hfs_extent));
 	res = hfs_brec_find(fd);
 	if (res && res != -ENOENT)
 		return res;
@@ -176,6 +177,7 @@ static inline int __hfs_ext_cache_extent(struct hfs_find_data *fd, struct inode
 			return res;
 	}
 
+	memset(HFS_I(inode)->cached_extents, 0, sizeof(HFS_I(inode)->cached_extents));
 	res = __hfs_ext_read_extent(fd, HFS_I(inode)->cached_extents, inode->i_ino,
 				    block, HFS_IS_RSRC(inode) ? HFS_FK_RSRC : HFS_FK_DATA);
 	if (!res) {