linux-kernel - [PATCH v1] dpaa2-switch: fix memory leak of dpaa2_switch_acl_entry

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Message-Id: <20220301141544.13411-1-fufuyqqqqqq@gmail.com>
Date:   Tue,  1 Mar 2022 22:15:44 +0800
From:   Yeqi Fu <fufuyqqqqqq@...il.com>
To:     ioana.ciornei@....com, davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Yeqi Fu <fufuyqqqqqq@...il.com>,
        Yongzhi Liu <lyz_cs@....edu.cn>
Subject: [PATCH v1] dpaa2-switch: fix memory leak of dpaa2_switch_acl_entry_add

The error handling branch did not properly free the memory of cmd_buf
before return, which would cause memory leak. So fix this by adding
kfree to the error handling branch.

Fixes: 1110318d83e8 ("dpaa2-switch: add tc flower hardware offload on ingress traffic")
Signed-off-by: Yeqi Fu <fufuyqqqqqq@...il.com>
Signed-off-by: Yongzhi Liu <lyz_cs@....edu.cn>
---
 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..4d07aee07f4c 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
@@ -132,6 +132,7 @@ int dpaa2_switch_acl_entry_add(struct dpaa2_switch_filter_block *filter_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;
 	}
 
@@ -142,6 +143,7 @@ int dpaa2_switch_acl_entry_add(struct dpaa2_switch_filter_block *filter_block,
 			 DMA_TO_DEVICE);
 	if (err) {
 		dev_err(dev, "dpsw_acl_add_entry() failed %d\n", err);
+		kfree(cmd_buff);
 		return err;
 	}
 
-- 
2.30.1 (Apple Git-130)