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

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[ Upstream commit 5066d5296f ]

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>
This commit is contained in:
Maninder Singh
2016-12-08 09:40:30 +05:30
committed by Greg Kroah-Hartman
parent 82338e9ffb
commit 0686a9bc42
1 changed files with 4 additions and 4 deletions
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8
arch/arm/mach-omap2/omap_hwmod.c
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@@ -790,14 +790,14 @@ static int _init_main_clk(struct omap_hwmod *oh)
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)) {