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authorPablo Neira Ayuso <pablo@netfilter.org>2011-01-06 11:25:00 -0800
committerDavid S. Miller <davem@davemloft.net>2011-01-06 11:25:00 -0800
commitcba85b532e4aabdb97f44c18987d45141fd93faa (patch)
tree785e2a715a922c36b15e1929473498e3b3aae724 /net/ipv4
parentf682cefa5ad204d3bfaa54a58046c66d2d035ac1 (diff)
netfilter: fix export secctx error handling
In 1ae4de0cdf855305765592647025bde55e85e451, the secctx was exported via the /proc/net/netfilter/nf_conntrack and ctnetlink interfaces instead of the secmark. That patch introduced the use of security_secid_to_secctx() which may return a non-zero value on error. In one of my setups, I have NF_CONNTRACK_SECMARK enabled but no security modules. Thus, security_secid_to_secctx() returns a negative value that results in the breakage of the /proc and `conntrack -L' outputs. To fix this, we skip the inclusion of secctx if the aforementioned function fails. This patch also fixes the dynamic netlink message size calculation if security_secid_to_secctx() returns an error, since its logic is also wrong. This problem exists in Linux kernel >= 2.6.37. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
index 37f8adb68c7..63f60fc5d26 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
@@ -97,7 +97,7 @@ static int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
if (ret)
- return ret;
+ return 0;
ret = seq_printf(s, "secctx=%s ", secctx);