netdev - Re: [PATCH net] net: sctp: sctp_v6_get_dst: fix boolean test in dst cache

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Message-Id: <20130213.134245.1682004516494856058.davem@davemloft.net>
Date:	Wed, 13 Feb 2013 13:42:45 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	dborkman@...hat.com
Cc:	linux-sctp@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH net] net: sctp: sctp_v6_get_dst: fix boolean test in
 dst cache

From: Daniel Borkmann <dborkman@...hat.com>
Date: Wed, 13 Feb 2013 00:30:16 +0100

> We walk through the bind address list and try to get the best source
> address for a given destination. However, currently, we take the
> 'continue' path of the loop when an entry is invalid (!laddr->valid)
> *and* the entry state does not equal SCTP_ADDR_SRC (laddr->state !=
> SCTP_ADDR_SRC).
> 
> Thus, still, invalid entries with SCTP_ADDR_SRC might not 'continue'
> as well as valid entries with SCTP_ADDR_{NEW, SRC, DEL}, with a possible
> false baddr and matchlen as a result, causing in worst case dst route
> to be false or possibly NULL.
> 
> This test should actually be a '||' instead of '&&'. But lets fix it
> and make this a bit easier to read by having the condition the same way
> as similarly done in sctp_v4_get_dst.
> 
> Signed-off-by: Daniel Borkmann <dborkman@...hat.com>

Applied.
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