linux-kernel - [PATCH 5/5] soc: fsl: dpaa2-console: free buffer before returning from dpaa2_console

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Message-Id: <20211018151034.137918-6-ioana.ciornei@nxp.com>
Date:   Mon, 18 Oct 2021 18:10:34 +0300
From:   Ioana Ciornei <ioana.ciornei@....com>
To:     leoyang.li@....com
Cc:     youri.querry_1@....com, linux-kernel@...r.kernel.org,
        Robert-Ionut Alexa <robert-ionut.alexa@....com>,
        Ioana Ciornei <ioana.ciornei@....com>
Subject: [PATCH 5/5] soc: fsl: dpaa2-console: free buffer before returning from dpaa2_console_read

From: Robert-Ionut Alexa <robert-ionut.alexa@....com>

Free the kbuf buffer before returning from the dpaa2_console_read()
function. The variable no longer goes out of scope, leaking the storage
it points to.

Fixes: c93349d8c170 ("soc: fsl: add DPAA2 console support")
Signed-off-by: Robert-Ionut Alexa <robert-ionut.alexa@....com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
---
 drivers/soc/fsl/dpaa2-console.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/soc/fsl/dpaa2-console.c b/drivers/soc/fsl/dpaa2-console.c
index 27243f706f37..53917410f2bd 100644
--- a/drivers/soc/fsl/dpaa2-console.c
+++ b/drivers/soc/fsl/dpaa2-console.c
@@ -231,6 +231,7 @@ static ssize_t dpaa2_console_read(struct file *fp, char __user *buf,
 	cd->cur_ptr += bytes;
 	written += bytes;
 
+	kfree(kbuf);
 	return written;
 
 err_free_buf:
-- 
2.33.1