linux-kernel - Re: [PATCH 2/4] asm-generic: uaccess: add missing access_ok() check to strnlen

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Message-Id: <200906142235.26522.arnd@arndb.de>
Date:	Sun, 14 Jun 2009 22:35:26 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Mike Frysinger <vapier@...too.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] asm-generic: uaccess: add missing access_ok() check to strnlen_user()

On Sunday 14 June 2009, Mike Frysinger wrote:
> The strnlen_user() function was missing a access_ok() check on the pointer
> given.  We've had cases on Blackfin systems where test programs caused
> kernel crashes here because userspace passed up a NULL/-1 pointer and the
> kernel gladly attempted to run strlen() on it.
> 
> Signed-off-by: Mike Frysinger <vapier@...too.org>

Applied, thanks.

	Arnd <><
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