linux-kernel - [PATCH] uinput strnlen bugfix

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Message-ID: <AANLkTi=vBv_a+X3MrgyDevss9H92vBJ51eON_qyMJW4=@mail.gmail.com>
Date:	Sun, 6 Feb 2011 17:49:23 +0100
From:	David Herrmann <dh.herrmann@...glemail.com>
To:	linux-kernel@...r.kernel.org
Cc:	aris@...hedrallabs.org
Subject: [PATCH] uinput strnlen bugfix

The uinput device driver (drivers/input/misc/uinput.c) incorrectly
computes the size of new device names. This patch fixes this. The diff
is against 2.6.37 but the bug also exists in the most recent git
sources.

strnlen() never returns negative numbers so the result should be
incremented after checking for zero. Otherwise the test will always be
false. This bug allows empty input device names.

Please CC me, I'm not subscribed to the mailing list.

David
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