From: Wei Chen <harperchen1110@gmail.com>
To: tiffany.lin@mediatek.com
Cc: andrew-ct.chen@mediatek.com, yunfei.dong@mediatek.com,
mchehab@kernel.org, matthias.bgg@gmail.com,
angelogioacchino.delregno@collabora.com,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org,
Wei Chen <harperchen1110@gmail.com>,
stable@vger.kernel.org
Subject: [PATCH v2] media: vcodec: Fix potential array out-of-bounds in encoder queue_setup
Date: Thu, 10 Aug 2023 08:23:33 +0000 [thread overview]
Message-ID: <20230810082333.972165-1-harperchen1110@gmail.com> (raw)
variable *nplanes is provided by user via system call argument. The
possible value of q_data->fmt->num_planes is 1-3, while the value
of *nplanes can be 1-8. The array access by index i can cause array
out-of-bounds.
Fix this bug by checking *nplanes against the array size.
Fixes: 4e855a6efa54 ("[media] vcodec: mediatek: Add Mediatek V4L2 Video Encoder Driver")
Signed-off-by: Wei Chen <harperchen1110@gmail.com>
Cc: stable@vger.kernel.org
---
Changes in v2:
- Add Fixes tag and CC stable email address
- Change the title to be more expressive
drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c
index 9ff439a50f53..9e8817863cb8 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c
@@ -821,6 +821,8 @@ static int vb2ops_venc_queue_setup(struct vb2_queue *vq,
return -EINVAL;
if (*nplanes) {
+ if (*nplanes != q_data->fmt->num_planes)
+ return -EINVAL;
for (i = 0; i < *nplanes; i++)
if (sizes[i] < q_data->sizeimage[i])
return -EINVAL;
--
2.25.1
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next reply other threads:[~2023-08-10 8:24 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-10 8:23 Wei Chen [this message]
2023-08-10 8:32 ` [PATCH v2] media: vcodec: Fix potential array out-of-bounds in encoder queue_setup Chen-Yu Tsai
2023-08-10 9:12 ` Eugen Hristev
2023-08-10 15:49 ` Greg KH
2023-08-10 13:58 ` Nicolas Dufresne
2023-08-16 12:37 ` Hans Verkuil
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