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btrfs: fix uninitialized ret in ref-verify 

Coverity caught a case where we could return with a uninitialized value
in ret in process_leaf.  This is actually pretty likely because we could
very easily run into a block group item key and have a garbage value in
ret and think there was an errror.  Fix this by initializing ret to 0.

Reported-by: Colin Ian King <colin.king@canonical.com>
Fixes: fd708b81d9 ("Btrfs: add a extent ref verify tool")
CC: stable@vger.kernel.org # 4.19+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2019-10-02 10:03:36 -04:00 committed by David Sterba
parent 11a19a9087
commit c5f4987e86
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/ref-verify.c
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@ -500,7 +500,7 @@ static int process_leaf(struct btrfs_root *root,
struct btrfs_extent_data_ref *dref;
struct btrfs_shared_data_ref *sref;
u32 count;
int i = 0, tree_block_level = 0, ret;
int i = 0, tree_block_level = 0, ret = 0;
struct btrfs_key key;
int nritems = btrfs_header_nritems(leaf);