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| author | Richard Haines <richard_c_haines@btinternet.com> | 2017-11-13 21:54:22 +0100 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2018-02-14 20:01:41 +0100 |
| commit | 213d7f94775322ba44e0bbb55ec6946e9de88cea (patch) | |
| tree | daac5442060f3e2f198ed341cebf344edfc0bdc6 | |
| parent | Linux 4.16-rc1 (diff) | |
| download | linux-213d7f94775322ba44e0bbb55ec6946e9de88cea.tar.xz linux-213d7f94775322ba44e0bbb55ec6946e9de88cea.zip | |
netlabel: If PF_INET6, check sk_buff ip header version
When resolving a fallback label, check the sk_buff version as it
is possible (e.g. SCTP) to have family = PF_INET6 while
receiving ip_hdr(skb)->version = 4.
Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
| -rw-r--r-- | net/netlabel/netlabel_unlabeled.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c index 22dc1b9d6362..c070dfc0190a 100644 --- a/net/netlabel/netlabel_unlabeled.c +++ b/net/netlabel/netlabel_unlabeled.c @@ -1472,6 +1472,16 @@ int netlbl_unlabel_getattr(const struct sk_buff *skb, iface = rcu_dereference(netlbl_unlhsh_def); if (iface == NULL || !iface->valid) goto unlabel_getattr_nolabel; + +#if IS_ENABLED(CONFIG_IPV6) + /* When resolving a fallback label, check the sk_buff version as + * it is possible (e.g. SCTP) to have family = PF_INET6 while + * receiving ip_hdr(skb)->version = 4. + */ + if (family == PF_INET6 && ip_hdr(skb)->version == 4) + family = PF_INET; +#endif /* IPv6 */ + switch (family) { case PF_INET: { struct iphdr *hdr4; |