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media: gspca: Limit frame size to sizeimage.

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Limit frame size to what userland code expects. This can happen when
cameras, such as Kensington VideoCAM, use fixed sized transfer packets
which includes trailing junk in the final packet.

Signed-off-by: Chad Fraleigh <chadf@triularity.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Chad Fraleigh 2021-08-30 01:51:27 +02:00 committed by Mauro Carvalho Chehab
parent b94b551050
commit 936c7daa4d
1 changed files with 2 additions and 0 deletions
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2
drivers/media/usb/gspca/gspca.c
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@ -444,6 +444,8 @@ void gspca_frame_add(struct gspca_dev *gspca_dev,
* next first packet, wake up the application and advance
* in the queue */
if (packet_type == LAST_PACKET) {
if (gspca_dev->image_len > gspca_dev->pixfmt.sizeimage)
gspca_dev->image_len = gspca_dev->pixfmt.sizeimage;
spin_lock_irqsave(&gspca_dev->qlock, flags);
list_del(&buf->list);
spin_unlock_irqrestore(&gspca_dev->qlock, flags);