linux-kernel - [PATCH] media: i2c: tvp5150: check return value of devm

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Date:   Thu, 15 Jun 2023 13:30:30 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <mchehab@...nel.org>, <hverkuil-cisco@...all.nl>,
        <olteanv@...il.com>, <javierm@...hat.com>,
        <sakari.ailus@...ux.intel.com>,
        <srinivas.pandruvada@...ux.intel.com>,
        <u.kleine-koenig@...gutronix.de>,
        <laurent.pinchart@...asonboard.com>, <m.felsch@...gutronix.de>
CC:     <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Claudiu Beznea" <claudiu.beznea@...rochip.com>
Subject: [PATCH] media: i2c: tvp5150: check return value of devm_kasprintf()

devm_kasprintf() returns a pointer to dynamically allocated memory.
Pointer could be NULL in case allocation fails. Check pointer validity.
Identified with coccinelle (kmerr.cocci script).

Fixes: 0556f1d580d4 ("media: tvp5150: add input source selection of_graph support")
Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---

Hi,

This has been addressed using kmerr.cocci script proposed for update
at [1].

Thank you,
Claudiu Beznea

[1] https://lore.kernel.org/all/20230530074044.1603426-1-claudiu.beznea@microchip.com/

 drivers/media/i2c/tvp5150.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c
index 859f1cb2fa74..84f87c016f9b 100644
--- a/drivers/media/i2c/tvp5150.c
+++ b/drivers/media/i2c/tvp5150.c
@@ -2068,6 +2068,10 @@ static int tvp5150_parse_dt(struct tvp5150 *decoder, struct device_node *np)
 		tvpc->ent.name = devm_kasprintf(dev, GFP_KERNEL, "%s %s",
 						v4l2c->name, v4l2c->label ?
 						v4l2c->label : "");
+		if (!tvpc->ent.name) {
+			ret = -ENOMEM;
+			goto err_free;
+		}
 	}
 
 	ep_np = of_graph_get_endpoint_by_regs(np, TVP5150_PAD_VID_OUT, 0);
-- 
2.34.1