This is a note to let you know that I've just added the patch titled
media: rc: check for integer overflow
to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: media-rc-check-for-integer-overflow.patch and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From 3e45067f94bbd61dec0619b1c32744eb0de480c8 Mon Sep 17 00:00:00 2001
From: Sean Young sean@mess.org Date: Sun, 8 Oct 2017 14:18:52 -0400 Subject: media: rc: check for integer overflow
From: Sean Young sean@mess.org
commit 3e45067f94bbd61dec0619b1c32744eb0de480c8 upstream.
The ioctl LIRC_SET_REC_TIMEOUT would set a timeout of 704ns if called with a timeout of 4294968us.
Signed-off-by: Sean Young sean@mess.org Signed-off-by: Mauro Carvalho Chehab mchehab@s-opensource.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/media/rc/ir-lirc-codec.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
--- a/drivers/media/rc/ir-lirc-codec.c +++ b/drivers/media/rc/ir-lirc-codec.c @@ -298,11 +298,14 @@ static long ir_lirc_ioctl(struct file *f if (!dev->max_timeout) return -ENOTTY;
+ /* Check for multiply overflow */ + if (val > U32_MAX / 1000) + return -EINVAL; + tmp = val * 1000;
- if (tmp < dev->min_timeout || - tmp > dev->max_timeout) - return -EINVAL; + if (tmp < dev->min_timeout || tmp > dev->max_timeout) + return -EINVAL;
if (dev->s_timeout) ret = dev->s_timeout(dev, tmp);
Patches currently in stable-queue which might be from sean@mess.org are
queue-4.14/media-rc-check-for-integer-overflow.patch queue-4.14/media-rc-nec-decoder-should-not-send-both-repeat-and-keycode.patch