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authorMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>2020-06-24 17:34:18 -0300
committerDavid S. Miller <davem@davemloft.net>2020-06-25 16:11:33 -0700
commit471e39df96b9a4c4ba88a2da9e25a126624d7a9c (patch)
treea06297f6b1d9cd3faf32b37b95d1fe01191209ed /net/sctp/protocol.c
parentb6186d413b1d50f45fe2415d760947576ef3691a (diff)
sctp: Don't advertise IPv4 addresses if ipv6only is set on the socket
If a socket is set ipv6only, it will still send IPv4 addresses in the INIT and INIT_ACK packets. This potentially misleads the peer into using them, which then would cause association termination. The fix is to not add IPv4 addresses to ipv6only sockets. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Tested-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/protocol.c')
-rw-r--r--net/sctp/protocol.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 092d1afdee0d..cde29f3c7fb3 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -148,7 +148,8 @@ int sctp_copy_local_addr_list(struct net *net, struct sctp_bind_addr *bp,
* sock as well as the remote peer.
*/
if (addr->a.sa.sa_family == AF_INET &&
- !(copy_flags & SCTP_ADDR4_PEERSUPP))
+ (!(copy_flags & SCTP_ADDR4_ALLOWED) ||
+ !(copy_flags & SCTP_ADDR4_PEERSUPP)))
continue;
if (addr->a.sa.sa_family == AF_INET6 &&
(!(copy_flags & SCTP_ADDR6_ALLOWED) ||