1 files changed, 14 insertions, 2 deletions

diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 5e570aa9e43b..7c509697ebc7 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -617,8 +617,21 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
                         ipc.oif = inet->mc_index;
                 if (!saddr)
                         saddr = inet->mc_addr;
-        } else if (!ipc.oif)
+        } else if (!ipc.oif) {
                 ipc.oif = inet->uc_index;
+        } else if (ipv4_is_lbcast(daddr) && inet->uc_index) {
+                /* oif is set, packet is to local broadcast and
+                 * and uc_index is set. oif is most likely set
+                 * by sk_bound_dev_if. If uc_index != oif check if the
+                 * oif is an L3 master and uc_index is an L3 slave.
+                 * If so, we want to allow the send using the uc_index.
+                 */
+                if (ipc.oif != inet->uc_index &&
+                    ipc.oif == l3mdev_master_ifindex_by_index(sock_net(sk),
+                                                              inet->uc_index)) {
+                        ipc.oif = inet->uc_index;
+                }
+        }
 
         flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
                            RT_SCOPE_UNIVERSE,
@@ -1119,7 +1132,6 @@ static int raw_v4_seq_open(struct inode *inode, struct file *file)
 }
 
 static const struct file_operations raw_seq_fops = {
-        .owner   = THIS_MODULE,
         .open    = raw_v4_seq_open,
         .read    = seq_read,
         .llseek  = seq_lseek,