Btrfs, fix memory leaks in error paths

Stanse found 2 memory leaks in relocate_block_group and
__btrfs_map_block. cluster and multi are not freed/assigned on all
paths. Fix that.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: linux-btrfs@vger.kernel.org
Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index a972868..ed3e4a2 100644 (file)
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3281,8 +3281,10 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc)
                return -ENOMEM;
 
        path = btrfs_alloc_path();
-       if (!path)
+       if (!path) {
+               kfree(cluster);
                return -ENOMEM;
+       }
 
        rc->extents_found = 0;
        rc->extents_skipped = 0;

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 198cff2..220dad5 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2649,8 +2649,10 @@ again:
        em = lookup_extent_mapping(em_tree, logical, *length);
        read_unlock(&em_tree->lock);
 
-       if (!em && unplug_page)
+       if (!em && unplug_page) {
+               kfree(multi);
                return 0;
+       }
 
        if (!em) {
                printk(KERN_CRIT "unable to find logical %llu len %llu\n",