From ce4d8b16e64d062f1c6271a0068dbbbba2dee620 Mon Sep 17 00:00:00 2001 From: Wenwen Wang Date: Mon, 19 Aug 2019 22:03:46 -0500 Subject: [PATCH] ubifs: Fix memory leak in read_znode() error path 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. Fixes: 16a26b20d2af ("ubifs: authentication: Add hashes to index nodes") Signed-off-by: Wenwen Wang Signed-off-by: Richard Weinberger --- 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 6f293f662d98..49cb34c3f324 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; }