linux-kernel - [ 02/46] net: rtm_to_ifaddr: free ifa if ifa

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Date:	Thu, 12 Sep 2013 10:58:13 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Daniel Borkmann <dborkman@...hat.com>,
	Jiri Pirko <jiri@...nulli.us>,
	"David S. Miller" <davem@...emloft.net>
Subject: [ 02/46] net: rtm_to_ifaddr: free ifa if ifa_cacheinfo processing fails

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daniel Borkmann <dborkman@...hat.com>

[ Upstream commit 446266b0c742a2c9ee8f0dce759a0117bce58a86 ]

Commit 5c766d642 ("ipv4: introduce address lifetime") leaves the ifa
resource that was allocated via inet_alloc_ifa() unfreed when returning
the function with -EINVAL. Thus, free it first via inet_free_ifa().

Signed-off-by: Daniel Borkmann <dborkman@...hat.com>
Reviewed-by: Jiri Pirko <jiri@...nulli.us>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/ipv4/devinet.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -771,7 +771,7 @@ static struct in_ifaddr *rtm_to_ifaddr(s
 		ci = nla_data(tb[IFA_CACHEINFO]);
 		if (!ci->ifa_valid || ci->ifa_prefered > ci->ifa_valid) {
 			err = -EINVAL;
-			goto errout;
+			goto errout_free;
 		}
 		*pvalid_lft = ci->ifa_valid;
 		*pprefered_lft = ci->ifa_prefered;
@@ -779,6 +779,8 @@ static struct in_ifaddr *rtm_to_ifaddr(s
 
 	return ifa;
 
+errout_free:
+	inet_free_ifa(ifa);
 errout:
 	return ERR_PTR(err);
 }


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