linux-kernel - [PATCH -next] staging: greybus: fix a missing-check bug in gb_lights_light

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Message-ID: <20200401030017.100274-1-chenzhou10@huawei.com>
Date:   Wed, 1 Apr 2020 11:00:17 +0800
From:   Chen Zhou <chenzhou10@...wei.com>
To:     <rmfrfs@...il.com>, <johan@...nel.org>, <elder@...nel.org>,
        <gregkh@...uxfoundation.org>
CC:     <chenzhou10@...wei.com>, <greybus-dev@...ts.linaro.org>,
        <devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH -next] staging: greybus: fix a missing-check bug in gb_lights_light_config()

In gb_lights_light_config(), 'light->name' is allocated by kstrndup().
It returns NULL when fails, add check for it.

Signed-off-by: Chen Zhou <chenzhou10@...wei.com>
---
 drivers/staging/greybus/light.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/greybus/light.c b/drivers/staging/greybus/light.c
index d6ba25f..d2672b6 100644
--- a/drivers/staging/greybus/light.c
+++ b/drivers/staging/greybus/light.c
@@ -1026,7 +1026,8 @@ static int gb_lights_light_config(struct gb_lights *glights, u8 id)
 
 	light->channels_count = conf.channel_count;
 	light->name = kstrndup(conf.name, NAMES_MAX, GFP_KERNEL);
-
+	if (!light->name)
+		return -ENOMEM;
 	light->channels = kcalloc(light->channels_count,
 				  sizeof(struct gb_channel), GFP_KERNEL);
 	if (!light->channels)
-- 
2.7.4