netdev - Re: [PATCH net 2/3] inet_diag: validate byte code to prevent oops in inet_diag_bc

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Message-Id: <20121209.190138.1226210899759529416.davem@davemloft.net>
Date:	Sun, 09 Dec 2012 19:01:38 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	ncardwell@...gle.com
Cc:	edumazet@...gle.com, netdev@...r.kernel.org
Subject: Re: [PATCH net 2/3] inet_diag: validate byte code to prevent oops
 in inet_diag_bc_run()

From: Neal Cardwell <ncardwell@...gle.com>
Date: Sun,  9 Dec 2012 00:43:22 -0500

> Add logic to validate INET_DIAG_BC_S_COND and INET_DIAG_BC_D_COND
> operations.
> 
> Previously we did not validate the inet_diag_hostcond, address family,
> address length, and prefix length. So a malicious user could make the
> kernel read beyond the end of the bytecode array by claiming to have a
> whole inet_diag_hostcond when the bytecode was not long enough to
> contain a whole inet_diag_hostcond of the given address family. Or
> they could make the kernel read up to about 27 bytes beyond the end of
> a connection address by passing a prefix length that exceeded the
> length of addresses of the given family.
> 
> Signed-off-by: Neal Cardwell <ncardwell@...gle.com>

Applied.
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