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Message-Id: <20220405070433.852792904@linuxfoundation.org>
Date: Tue, 5 Apr 2022 09:27:24 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Mirela Rabulea <mirela.rabulea@....nxp.com>,
Hans Verkuil <hverkuil-cisco@...all.nl>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.17 0897/1126] media: imx-jpeg: Prevent decoding NV12M jpegs into single-planar buffers
From: Mirela Rabulea <mirela.rabulea@....nxp.com>
[ Upstream commit 417591a766b3c040c346044541ff949c0b2bb7b2 ]
If the application queues an NV12M jpeg as output buffer, but then
queues a single planar capture buffer, the kernel will crash with
"Unable to handle kernel NULL pointer dereference" in mxc_jpeg_addrs,
prevent this by finishing the job with error.
Signed-off-by: Mirela Rabulea <mirela.rabulea@....nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/media/platform/imx-jpeg/mxc-jpeg.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/media/platform/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/imx-jpeg/mxc-jpeg.c
index 4ca96cf9def7..b249c1bbfac8 100644
--- a/drivers/media/platform/imx-jpeg/mxc-jpeg.c
+++ b/drivers/media/platform/imx-jpeg/mxc-jpeg.c
@@ -947,6 +947,12 @@ static void mxc_jpeg_device_run(void *priv)
v4l2_m2m_buf_copy_metadata(src_buf, dst_buf, true);
jpeg_src_buf = vb2_to_mxc_buf(&src_buf->vb2_buf);
+ if (q_data_cap->fmt->colplanes != dst_buf->vb2_buf.num_planes) {
+ dev_err(dev, "Capture format %s has %d planes, but capture buffer has %d planes\n",
+ q_data_cap->fmt->name, q_data_cap->fmt->colplanes,
+ dst_buf->vb2_buf.num_planes);
+ jpeg_src_buf->jpeg_parse_error = true;
+ }
if (jpeg_src_buf->jpeg_parse_error) {
jpeg->slot_data[ctx->slot].used = false;
v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
--
2.34.1
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