Patch "ARM: omap2+: fixing wrong strcat for Non-NULL terminated string" has been added to the 4.9-stable tree

Patch "ARM: omap2+: fixing wrong strcat for Non-NULL terminated string" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ARM: omap2+: fixing wrong strcat for Non-NULL terminated string

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arm-omap2-fixing-wrong-strcat-for-non-null-terminated-string.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Fri Aug  4 13:32:40 PDT 2017
From: Maninder Singh <maninder1.s@samsung.com>
Date: Thu, 8 Dec 2016 09:40:30 +0530
Subject: ARM: omap2+: fixing wrong strcat for Non-NULL terminated string

From: Maninder Singh <maninder1.s@samsung.com>


[ Upstream commit 5066d5296ff2db20625e5f46e7338872c90c649f ]

Issue caught with static analysis tool:
"Dangerous usage of 'name' (strncpy doesn't always 0-terminate it)"

Use strlcpy _includes_ the NUL terminator, and  strlcat() which ensures
that it won't overflow the buffer.

Reported-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Vaneet Narang <v.narang@samsung.com>
CC: Russell King <linux@armlinux.org.uk>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/arm/mach-omap2/omap_hwmod.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -790,14 +790,14 @@ static int _init_main_clk(struct omap_hw
 	int ret = 0;
 	char name[MOD_CLK_MAX_NAME_LEN];
 	struct clk *clk;
+	static const char modck[] = "_mod_ck";
 
-	/* +7 magic comes from '_mod_ck' suffix */
-	if (strlen(oh->name) + 7 > MOD_CLK_MAX_NAME_LEN)
+	if (strlen(oh->name) >= MOD_CLK_MAX_NAME_LEN - strlen(modck))
 		pr_warn("%s: warning: cropping name for %s\n", __func__,
 			oh->name);
 
-	strncpy(name, oh->name, MOD_CLK_MAX_NAME_LEN - 7);
-	strcat(name, "_mod_ck");
+	strlcpy(name, oh->name, MOD_CLK_MAX_NAME_LEN - strlen(modck));
+	strlcat(name, modck, MOD_CLK_MAX_NAME_LEN);
 
 	clk = clk_get(NULL, name);
 	if (!IS_ERR(clk)) {


Patches currently in stable-queue which might be from maninder1.s@samsung.com are

queue-4.9/arm-omap2-fixing-wrong-strcat-for-non-null-terminated-string.patch