tcp: tcp_md5_hash_skb_data() frag_list handling

tcp_md5_hash_skb_data() should handle skb->frag_list, and eventually
recurse.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 6596b4feeddc..49d0d2b8900c 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2999,6 +2999,7 @@ int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *hp,
         const unsigned head_data_len = skb_headlen(skb) > header_len ?
                                        skb_headlen(skb) - header_len : 0;
         const struct skb_shared_info *shi = skb_shinfo(skb);
+        struct sk_buff *frag_iter;
 
         sg_init_table(&sg, 1);
 
@@ -3013,6 +3014,10 @@ int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *hp,
                         return 1;
         }
 
+        skb_walk_frags(skb, frag_iter)
+                if (tcp_md5_hash_skb_data(hp, frag_iter, 0))
+                        return 1;
+
         return 0;
 }