From: Al Viro <viro@ftp.linux.org.uk>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Vinay Venkataraghavan <raghavanvinay@yahoo.com>,
linux-kernel@vger.kernel.org
Subject: Re: copy_from_user/copy_to_user question
Date: Sat, 3 Dec 2005 01:38:33 +0000 [thread overview]
Message-ID: <20051203013833.GG27946@ftp.linux.org.uk> (raw)
In-Reply-To: <1133572199.32583.93.camel@localhost.localdomain>
On Fri, Dec 02, 2005 at 08:09:59PM -0500, Steven Rostedt wrote:
> > Secondly, they seem to use memcpy as opposed to using
> > copy_to_user/copy_from_user which is also very
> > dangerous.
>
> If they are grabbing data from user context into kernel (or vise versa)
> that could easily cause an oops. Not to mention it is a security risk.
Not to mention it simply won't work on a many platforms, no matter what...
next prev parent reply other threads:[~2005-12-03 1:38 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-02 22:40 copy_from_user/copy_to_user question Vinay Venkataraghavan
2005-12-03 1:09 ` Steven Rostedt
2005-12-03 1:38 ` Al Viro [this message]
2005-12-03 2:02 ` Steven Rostedt
2005-12-03 2:11 ` Vinay Venkataraghavan
2005-12-03 2:22 ` Vinay Venkataraghavan
2005-12-03 2:27 ` Steven Rostedt
2005-12-03 8:33 ` Arjan van de Ven
2005-12-03 9:43 ` Heiko Carstens
2005-12-03 12:14 ` Steven Rostedt
2005-12-03 22:33 ` Andi Kleen
2005-12-05 13:31 ` linux-os (Dick Johnson)
[not found] <5fv0G-3kS-11@gated-at.bofh.it>
[not found] ` <5fvam-3vP-9@gated-at.bofh.it>
2005-12-03 2:47 ` Robert Hancock
2005-12-03 3:23 ` Steven Rostedt
2005-12-03 3:33 ` Robert Hancock
2005-12-03 4:53 ` Steven Rostedt
2005-12-03 22:35 ` Andi Kleen
2005-12-03 18:26 ` Steven Rostedt
2005-12-06 17:53 ` Vinay Venkataraghavan
2005-12-06 17:56 ` Arjan van de Ven
2005-12-06 18:23 ` Steven Rostedt
2005-12-06 18:23 ` linux-os (Dick Johnson)
2005-12-06 18:42 ` Steven Rostedt
2005-12-06 19:58 ` linux-os (Dick Johnson)
2005-12-06 20:05 ` Vinay Venkataraghavan
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