This is a note to let you know that I've just added the patch titled [media] si2157: Bounds check firmware to the 4.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: si2157-bounds-check-firmware.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From a828d72df216c36e9c40b6c24dc4b17b6f7b5a76 Mon Sep 17 00:00:00 2001 From: Laura Abbott <labbott@xxxxxxxxxxxxxxxxx> Date: Tue, 29 Sep 2015 21:10:10 -0300 Subject: [media] si2157: Bounds check firmware From: Laura Abbott <labbott@xxxxxxxxxxxxxxxxx> commit a828d72df216c36e9c40b6c24dc4b17b6f7b5a76 upstream. When reading the firmware and sending commands, the length must be bounds checked to avoid overrunning the size of the command buffer and smashing the stack if the firmware is not in the expected format. Add the proper check. Signed-off-by: Laura Abbott <labbott@xxxxxxxxxxxxxxxxx> Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/media/tuners/si2157.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/media/tuners/si2157.c +++ b/drivers/media/tuners/si2157.c @@ -165,6 +165,10 @@ static int si2157_init(struct dvb_fronte for (remaining = fw->size; remaining > 0; remaining -= 17) { len = fw->data[fw->size - remaining]; + if (len > SI2157_ARGLEN) { + dev_err(&client->dev, "Bad firmware length\n"); + goto err_release_firmware; + } memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len); cmd.wlen = len; cmd.rlen = 1; Patches currently in stable-queue which might be from labbott@xxxxxxxxxxxxxxxxx are queue-4.1/si2157-bounds-check-firmware.patch queue-4.1/si2168-bounds-check-firmware.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html