soc: fsl: dpaa2-console: free buffer before returning from dpaa2_console_read

[ Upstream commit 8120bd469f5525da229953c1197f2b826c0109f4 ]

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@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/soc/fsl/dpaa2-console.c b/drivers/soc/fsl/dpaa2-console.c
index 27243f706f3761c932f95eca8ec4fb9e19849bb6..53917410f2bdb9c4f9ea759c77bba79f0a04ef5e 100644 (file)
--- 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: