linux-kernel - [PATCH 3.2 018/185] powerpc/vio: use strcpy in modalias

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Message-ID: <lsq.1388282923.255279067@decadent.org.uk>
Date:	Sun, 29 Dec 2013 03:08:43 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Prarit Bhargava" <prarit@...hat.com>,
	benh@...nel.crashing.org, Prarit@...adent.org.uk
Subject: [PATCH 3.2 018/185] powerpc/vio: use strcpy in modalias_show

3.2.54-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Prarit Bhargava <prarit@...hat.com>

commit 411cabf79e684171669ad29a0628c400b4431e95 upstream.

Commit e82b89a6f19bae73fb064d1b3dd91fcefbb478f4 used strcat instead of
strcpy which can result in an overflow of newlines on the buffer.

Signed-off-by: Prarit Bhargava
Cc: benh@...nel.crashing.org
Cc: ben@...adent.org.uk
Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 arch/powerpc/kernel/vio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -1352,12 +1352,12 @@ static ssize_t modalias_show(struct devi
 
 	dn = dev->of_node;
 	if (!dn) {
-		strcat(buf, "\n");
+		strcpy(buf, "\n");
 		return strlen(buf);
 	}
 	cp = of_get_property(dn, "compatible", NULL);
 	if (!cp) {
-		strcat(buf, "\n");
+		strcpy(buf, "\n");
 		return strlen(buf);
 	}
 

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