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From:   Q1IQ <fufuyqqqqqq@gmail.com>
To:     ioana.ciornei@nxp.com, davem@davemloft.net, kuba@kernel.org
Cc:     netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        lyz_cs@pku.edu.cn, Q1IQ <fufuyqqqqqq@gmail.com>
Subject: [PATCH] dpaa2 ethernet switch driver: Fix memory leak in dpaa2_switch_acl_entry_remove()
Date:   Tue,  1 Mar 2022 17:24:50 +0800
Message-Id: <20220301092450.42523-1-fufuyqqqqqq@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

[why]
The error handling branch did not properly free the memory of cmd_buf
before return, which would cause memory leak.

[how]
Fix this by adding kfree to the error handling branch.

Signed-off-by: Q1IQ <fufuyqqqqqq@gmail.com>
---
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
index cacd454ac696..e85ca01718a9 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
@@ -172,6 +172,7 @@ dpaa2_switch_acl_entry_remove(struct dpaa2_switch_filter_block *block,
 						 DMA_TO_DEVICE);
 	if (unlikely(dma_mapping_error(dev, acl_entry_cfg->key_iova))) {
 		dev_err(dev, "DMA mapping failed\n");
+		kfree(cmd_buff);
 		return -EFAULT;
 	}
 
@@ -182,6 +183,7 @@ dpaa2_switch_acl_entry_remove(struct dpaa2_switch_filter_block *block,
 			 DMA_TO_DEVICE);
 	if (err) {
 		dev_err(dev, "dpsw_acl_remove_entry() failed %d\n", err);
+		kfree(cmd_buff);
 		return err;
 	}
 
-- 
2.30.1 (Apple Git-130)