From: <gregkh@linuxfoundation.org>
To: alexander.levin@verizon.com, davem@davemloft.net,
gregkh@linuxfoundation.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "wireless: wext: terminate ifr name coming from userspace" has been added to the 4.12-stable tree
Date: Tue, 08 Aug 2017 16:29:34 -0700 [thread overview]
Message-ID: <150223497470144@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
wireless: wext: terminate ifr name coming from userspace
to the 4.12-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:
wireless-wext-terminate-ifr-name-coming-from-userspace.patch
and it can be found in the queue-4.12 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 foo@baz Tue Aug 8 16:27:29 PDT 2017
From: "Levin, Alexander" <alexander.levin@verizon.com>
Date: Tue, 18 Jul 2017 04:23:16 +0000
Subject: wireless: wext: terminate ifr name coming from userspace
From: "Levin, Alexander" <alexander.levin@verizon.com>
[ Upstream commit 98de4e0ea47d106846fc0e30ce4e644283fa7fc2 ]
ifr name is assumed to be a valid string by the kernel, but nothing
was forcing username to pass a valid string.
In turn, this would cause panics as we tried to access the string
past it's valid memory.
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/core/dev_ioctl.c | 2 ++
1 file changed, 2 insertions(+)
--- a/net/core/dev_ioctl.c
+++ b/net/core/dev_ioctl.c
@@ -423,6 +423,8 @@ int dev_ioctl(struct net *net, unsigned
if (copy_from_user(&iwr, arg, sizeof(iwr)))
return -EFAULT;
+ iwr.ifr_name[sizeof(iwr.ifr_name) - 1] = 0;
+
return wext_handle_ioctl(net, &iwr, cmd, arg);
}
Patches currently in stable-queue which might be from alexander.levin@verizon.com are
queue-4.12/packet-fix-use-after-free-in-prb_retire_rx_blk_timer_expired.patch
queue-4.12/wireless-wext-terminate-ifr-name-coming-from-userspace.patch
reply other threads:[~2017-08-08 23:29 UTC|newest]
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