linux-kernel - [PATCH] staging: csr: fix possible memory leak in do_patch_convert

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Date:	Mon, 3 Sep 2012 18:15:26 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	gregkh@...uxfoundation.org
Cc:	yongjun_wei@...ndmicro.com.cn, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] staging: csr: fix possible memory leak in do_patch_convert_download()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

pfw has been allocated in function xbv_to_patch() and should be
freed before leaving from the error handling cases.

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 drivers/staging/csr/csr_wifi_hip_download.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/csr/csr_wifi_hip_download.c b/drivers/staging/csr/csr_wifi_hip_download.c
index 8e4a460..6db672c 100644
--- a/drivers/staging/csr/csr_wifi_hip_download.c
+++ b/drivers/staging/csr/csr_wifi_hip_download.c
@@ -250,6 +250,7 @@ static CsrResult do_patch_convert_download(card_t *card, void *dlpriv, xbv1_t *p
         if (r != CSR_RESULT_SUCCESS)
         {
             unifi_error(card->ospriv, "Failed to find BOOT_LOADER_CONTROL\n");
+            kfree(pfw);
             return CSR_RESULT_FAILURE;
         }
 
@@ -265,6 +266,7 @@ static CsrResult do_patch_convert_download(card_t *card, void *dlpriv, xbv1_t *p
         desc = unifi_fw_open_buffer(card->ospriv, pfw, psize);
         if (!desc)
         {
+            kfree(pfw);
             return CSR_WIFI_HIP_RESULT_NO_MEMORY;
         }
 


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