[PATCH] ubifs: fix a memory leak bug

[Wenwen Wang]

In read_znode(), the indexing node 'idx' is allocated by kmalloc().
However, it is not deallocated in the following execution if
ubifs_node_check_hash() fails, leading to a memory leak bug. To fix this
issue, free 'idx' before returning the error.

Signed-off-by: Wenwen Wang <wen...@cs.uga.edu>
---
 fs/ubifs/tnc_misc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ubifs/tnc_misc.c b/fs/ubifs/tnc_misc.c
index 6f293f6..49cb34c 100644
--- a/fs/ubifs/tnc_misc.c
+++ b/fs/ubifs/tnc_misc.c
@@ -284,6 +284,7 @@ static int read_znode(struct ubifs_info *c, struct 
ubifs_zbranch *zzbr,
        err = ubifs_node_check_hash(c, idx, zzbr->hash);
        if (err) {
                ubifs_bad_hash(c, idx, zzbr->hash, lnum, offs);
+               kfree(idx);
                return err;
        }
 
-- 
2.7.4