linux-kernel - [PATCH][next] soc: fsl: dpio: fix memory leak of a struct qbman on error exit path

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Date:   Tue, 19 Feb 2019 14:05:17 +0000
From:   Colin King <colin.king@...onical.com>
To:     Roy Pledge <Roy.Pledge@....com>, Li Yang <leoyang.li@....com>,
        linuxppc-dev@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] soc: fsl: dpio: fix memory leak of a struct qbman on error exit path

From: Colin Ian King <colin.king@...onical.com>

Currently the error check for a null reg leaks a struct qbman
that was allocated earlier. Fix this by kfree'ing p on the error exit
path.

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/soc/fsl/dpio/qbman-portal.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/soc/fsl/dpio/qbman-portal.c b/drivers/soc/fsl/dpio/qbman-portal.c
index 0bddb85c0ae5..5a73397ae79e 100644
--- a/drivers/soc/fsl/dpio/qbman-portal.c
+++ b/drivers/soc/fsl/dpio/qbman-portal.c
@@ -180,6 +180,7 @@ struct qbman_swp *qbman_swp_init(const struct qbman_swp_desc *d)
 	reg = qbman_read_register(p, QBMAN_CINH_SWP_CFG);
 	if (!reg) {
 		pr_err("qbman: the portal is not enabled!\n");
+		kfree(p);
 		return NULL;
 	}
 
-- 
2.20.1