linux-kernel - [PATCH v2] staging: rtl8192u: r8192U_core: Fix for possible null pointer dereference

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Message-Id: <1422557952-4209-1-git-send-email-rickard_strandqvist@spectrumdigital.se>
Date:	Thu, 29 Jan 2015 19:59:12 +0100
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Antoine Schweitzer-Chaput <antoine@...weitzer-chaput.fr>,
	Ana Rey <anarey@...il.com>, Chaitanya Hazarey <c@...io>,
	Koray Gulcu <koray.gulcu@....edu.tr>,
	Greg Donald <gdonald@...il.com>, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] staging: rtl8192u: r8192U_core: Fix for possible null pointer dereference

Fix a possible null pointer dereference, there is
otherwise a risk of a possible null pointer dereference.

This was found using a static code analysis program called cppcheck

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 drivers/staging/rtl8192u/r8192U_core.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c
index e031a25..4a29237 100644
--- a/drivers/staging/rtl8192u/r8192U_core.c
+++ b/drivers/staging/rtl8192u/r8192U_core.c
@@ -4476,11 +4476,11 @@ static void query_rxdesc_status(struct sk_buff *skb,
 
 	/* for debug 2008.5.29 */
 
-	//added by vivi, for MP, 20080108
-	stats->RxIs40MHzPacket = driver_info->BW;
-	if (stats->RxDrvInfoSize != 0)
+	if (driver_info && stats->RxDrvInfoSize != 0) {
+		//added by vivi, for MP, 20080108
+		stats->RxIs40MHzPacket = driver_info->BW;
 		TranslateRxSignalStuff819xUsb(skb, stats, driver_info);
-
+	}
 }
 
 static void rtl8192_rx_nomal(struct sk_buff *skb)
-- 
1.7.10.4

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