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From: Colin King <colin.king@canonical.com>
To: Maxime Jourdan <mjourdan@baylibre.com>,
	Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Kevin Hilman <khilman@baylibre.com>,
	Hans Verkuil <hverkuil-cisco@xs4all.nl>,
	linux-media@vger.kernel.org, linux-amlogic@lists.infradead.org,
	devel@driverdev.osuosl.org, linux-arm-kernel@lists.infradead.org
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] media: meson: add missing allocation failure check on new_buf
Date: Wed,  4 Dec 2019 14:11:59 +0000
Message-ID: <20191204141159.1432387-1-colin.king@canonical.com> (raw)

From: Colin Ian King <colin.king@canonical.com>

Currently if the allocation of new_buf fails then a null pointer
dereference occurs when assiging new_buf->vb. Avoid this by returning
early on a memory allocation failure as there is not much more can
be done at this point.

Addresses-Coverity: ("Dereference null return")
Fixes: 3e7f51bd9607 ("media: meson: add v4l2 m2m video decoder driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/staging/media/meson/vdec/vdec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/media/meson/vdec/vdec.c b/drivers/staging/media/meson/vdec/vdec.c
index 0a1a04fd5d13..8dd1396909d7 100644
--- a/drivers/staging/media/meson/vdec/vdec.c
+++ b/drivers/staging/media/meson/vdec/vdec.c
@@ -133,6 +133,8 @@ vdec_queue_recycle(struct amvdec_session *sess, struct vb2_buffer *vb)
 	struct amvdec_buffer *new_buf;
 
 	new_buf = kmalloc(sizeof(*new_buf), GFP_KERNEL);
+	if (!new_buf)
+		return;
 	new_buf->vb = vb;
 
 	mutex_lock(&sess->bufs_recycle_lock);
-- 
2.24.0


             reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-04 14:11 Colin King [this message]
2019-12-05  2:39 ` Kevin Hilman
2019-12-05  8:06 ` Sergey Senozhatsky

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