[PATCH AUTOSEL 5.4 035/330] clk/ti/adpll: allocate room for terminating null

Sasha Levin
2020-09-18T03:13:50Z

From: Stephen Kitt <steve@sk2.org>

[ Upstream commit 7f6ac72946b88b89ee44c1c527aa8591ac5ffcbe ]

The buffer allocated in ti_adpll_clk_get_name doesn't account for the
terminating null. This patch switches to devm_kasprintf to avoid
overflowing.

Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lkml.kernel.org/r/20191019140634.15596-1-steve@sk2.org
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/clk/ti/adpll.c | 11 ++---------
1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/drivers/clk/ti/adpll.c b/drivers/clk/ti/adpll.c
index fdfb90058504c..bb2f2836dab22 100644
--- a/drivers/clk/ti/adpll.c
+++ b/drivers/clk/ti/adpll.c
@@ -194,15 +194,8 @@ static const char *ti_adpll_clk_get_name(struct ti_adpll_data *d,
if (err)
return NULL;
} else {
- const char *base_name = "adpll";
- char *buf;
-
- buf = devm_kzalloc(d->dev, 8 + 1 + strlen(base_name) + 1 +
- strlen(postfix), GFP_KERNEL);
- if (!buf)
- return NULL;
- sprintf(buf, "%08lx.%s.%s", d->pa, base_name, postfix);
- name = buf;
+ name = devm_kasprintf(d->dev, GFP_KERNEL, "%08lx.adpll.%s",
+ d->pa, postfix);
}

return name;
--
2.25.1