From: Filipe Manana <fdman...@suse.com>
commit 4f26433e9b3eb7a55ed70d8f882ae9cd48ba448b upstream.
While logging an inode, at copy_items(), if we fail to lookup the checksums
for an extent we release the destination path, free the ins_data array and
then return immediately. However a previous iteration of the for loop may
have added checksums to the ordered_sums list, in which case we leak the
memory used by them.
So fix this by making sure we iterate the ordered_sums list and free all
its checksums before returning.
Fixes: 3650860b90cc2a ("Btrfs: remove almost all of the BUG()'s from
tree-log.c")
CC: sta...@vger.kernel.org # 4.4+
Reviewed-by: Johannes Thumshirn <johannes.thumsh...@wdc.com>
Signed-off-by: Filipe Manana <fdman...@suse.com>
Reviewed-by: David Sterba <dste...@suse.com>
Signed-off-by: David Sterba <dste...@suse.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
fs/btrfs/tree-log.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -3733,11 +3733,8 @@ static noinline int copy_items(struct bt
log->fs_info->csum_root,
ds + cs, ds + cs + cl - 1,
&ordered_sums, 0);
- if (ret) {
- btrfs_release_path(dst_path);
- kfree(ins_data);
- return ret;
- }
+ if (ret)
+ break;
}
}
}
@@ -3750,7 +3747,6 @@ static noinline int copy_items(struct bt
* we have to do this after the loop above to avoid changing the
* log tree while trying to change the log tree.
*/
- ret = 0;
while (!list_empty(&ordered_sums)) {
struct btrfs_ordered_sum *sums = list_entry(ordered_sums.next,
struct btrfs_ordered_sum,
