From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
To: stable@vger.kernel.org
Subject: Important regression fix patch
Date: Fri, 13 Apr 2018 05:48:31 -0300 [thread overview]
Message-ID: <20180413054831.39698e8a@vento.lan> (raw)
Hi Greg,
There are two important v4l2-core fixes on the patches merged this week by
Linux.
1) media: v4l2-core: fix size of devnode_nums[] bitarray
This patch correct a regression against Kernel 4.16. It affects notebooks
with advanced Synaptics mice (and similar touch devices). On those devices,
the pad produces an image with is handled via V4L2. Without this patch,
the input driver OOPSes at probing time:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a95845ba184b854106972f5d8f50354c2d272c06
2) v4l2-compat-ioctl32: don't oops on overlay
This patch complements the security fix we've made at the V4L2 core
compat32 logic. It fixes an illegal use of an __user pointer without
first convert into a Kernel pointer with get_user(). It wasn't detect
before, as it uses an obscure streaming mode of V4L2 (overlay mode):
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=85ea29f19eab56ec16ec6b92bc67305998706afa
This one should go all the way down to stable Kernels. Here, I was able
to reproduce the bug with both upstream Kernel and Kernel 3.18. The
patch applied without any conflicts on both.
Could you please add both on your next set of -stable releases?
Thanks,
Mauro
next reply other threads:[~2018-04-13 8:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-13 8:48 Mauro Carvalho Chehab [this message]
2018-04-14 14:37 ` Important regression fix patch Greg KH
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