From:   =?UTF-8?q?Jos=C3=A9=20Exp=C3=B3sito?= <jose.exposito89@gmail.com>
To:     nick@shmanahar.org
Cc:     dmitry.torokhov@gmail.com, rydberg@bitmath.org,
        linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
        =?UTF-8?q?Jos=C3=A9=20Exp=C3=B3sito?= <jose.exposito89@gmail.com>
Subject: [PATCH] Input: atmel_mxt_ts - fix double free in mxt_read_info_block
Date:   Sun, 12 Dec 2021 20:42:57 +0100
Message-Id: <20211212194257.68879-1-jose.exposito89@gmail.com>
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Precedence: bulk

The "id_buf" buffer is stored in "data->raw_info_block" and freed by
"mxt_free_object_table" in case of error.

Return instead of jumping to avoid a double free.

Addresses-Coverity-ID: 1474582 ("Double free")
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 05de92c0293b..eb66cd2689b7 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -1882,7 +1882,7 @@ static int mxt_read_info_block(struct mxt_data *data)
 	if (error) {
 		dev_err(&client->dev, "Error %d parsing object table\n", error);
 		mxt_free_object_table(data);
-		goto err_free_mem;
+		return error;
 	}
 
 	data->object_table = (struct mxt_object *)(id_buf + MXT_OBJECT_START);
-- 
2.25.1