linux-kernel - [PATCH] media: vidtv: Check for null return of vzalloc

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Message-Id: <20211231075019.1894177-1-jiasheng@iscas.ac.cn>
Date:   Fri, 31 Dec 2021 15:50:19 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     dwlsalmeida@...il.com, mchehab@...nel.org
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] media: vidtv: Check for null return of vzalloc

As the possible failure of the vzalloc(), e->encoder_buf might be NULL.
Therefore, it should be better to check it like the kzalloc() in order
to guarantee the success of the initialization.

Fixes: f90cf6079bf6 ("media: vidtv: add a bridge driver")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/media/test-drivers/vidtv/vidtv_s302m.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/test-drivers/vidtv/vidtv_s302m.c b/drivers/media/test-drivers/vidtv/vidtv_s302m.c
index d79b65854627..d7907f1ae530 100644
--- a/drivers/media/test-drivers/vidtv/vidtv_s302m.c
+++ b/drivers/media/test-drivers/vidtv/vidtv_s302m.c
@@ -455,6 +455,11 @@ struct vidtv_encoder
 		e->name = kstrdup(args.name, GFP_KERNEL);
 
 	e->encoder_buf = vzalloc(VIDTV_S302M_BUF_SZ);
+	if (!e->encoder_buf) {
+		kfree(e);
+		return NULL;
+	}
+
 	e->encoder_buf_sz = VIDTV_S302M_BUF_SZ;
 	e->encoder_buf_offset = 0;
 
-- 
2.25.1