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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Dinghao Liu <dinghao.liu@zju.edu.cn>,
        Zhihao Cheng <chengzhihao1@huawei.com>,
        Richard Weinberger <richard@nod.at>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.10 251/663] ubifs: Fix memleak in ubifs_init_authentication
Date:   Mon,  1 Mar 2021 17:08:19 +0100
Message-Id: <20210301161154.243335109@linuxfoundation.org>
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From: Dinghao Liu <dinghao.liu@zju.edu.cn>

[ Upstream commit 11b8ab3836454a2600e396f34731e491b661f9d5 ]

When crypto_shash_digestsize() fails, c->hmac_tfm
has not been freed before returning, which leads
to memleak.

Fixes: 49525e5eecca5 ("ubifs: Add helper functions for authentication support")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/ubifs/auth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ubifs/auth.c b/fs/ubifs/auth.c
index 8c50de693e1d4..50e88a2ab88ff 100644
--- a/fs/ubifs/auth.c
+++ b/fs/ubifs/auth.c
@@ -328,7 +328,7 @@ int ubifs_init_authentication(struct ubifs_info *c)
 		ubifs_err(c, "hmac %s is bigger than maximum allowed hmac size (%d > %d)",
 			  hmac_name, c->hmac_desc_len, UBIFS_HMAC_ARR_SZ);
 		err = -EINVAL;
-		goto out_free_hash;
+		goto out_free_hmac;
 	}
 
 	err = crypto_shash_setkey(c->hmac_tfm, ukp->data, ukp->datalen);
-- 
2.27.0