ppp: avoid false drop_monitor false positives

Call consume_skb() in place of kfree_skb() were appropriate.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ppp/ppp_async.c b/drivers/net/ppp/ppp_async.c
index af95a98..a031f6b 100644 (file)
--- a/drivers/net/ppp/ppp_async.c
+++ b/drivers/net/ppp/ppp_async.c
@@ -613,7 +613,7 @@ ppp_async_encode(struct asyncppp *ap)
        *buf++ = PPP_FLAG;
        ap->olim = buf;
 
-       kfree_skb(ap->tpkt);
+       consume_skb(ap->tpkt);
        ap->tpkt = NULL;
        return 1;
 }

diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index 21d7151..5c05572 100644 (file)
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -1092,13 +1092,13 @@ pad_compress_skb(struct ppp *ppp, struct sk_buff *skb)
                                   new_skb->data, skb->len + 2,
                                   compressor_skb_size);
        if (len > 0 && (ppp->flags & SC_CCP_UP)) {
-               kfree_skb(skb);
+               consume_skb(skb);
                skb = new_skb;
                skb_put(skb, len);
                skb_pull(skb, 2);       /* pull off A/C bytes */
        } else if (len == 0) {
                /* didn't compress, or CCP not up yet */
-               kfree_skb(new_skb);
+               consume_skb(new_skb);
                new_skb = skb;
        } else {
                /*
@@ -1112,7 +1112,7 @@ pad_compress_skb(struct ppp *ppp, struct sk_buff *skb)
                if (net_ratelimit())
                        netdev_err(ppp->dev, "ppp: compressor dropped pkt\n");
                kfree_skb(skb);
-               kfree_skb(new_skb);
+               consume_skb(new_skb);
                new_skb = NULL;
        }
        return new_skb;
@@ -1178,7 +1178,7 @@ ppp_send_frame(struct ppp *ppp, struct sk_buff *skb)
                                    !(ppp->flags & SC_NO_TCP_CCID));
                if (cp == skb->data + 2) {
                        /* didn't compress */
-                       kfree_skb(new_skb);
+                       consume_skb(new_skb);
                } else {
                        if (cp[0] & SL_TYPE_COMPRESSED_TCP) {
                                proto = PPP_VJC_COMP;
@@ -1187,7 +1187,7 @@ ppp_send_frame(struct ppp *ppp, struct sk_buff *skb)
                                proto = PPP_VJC_UNCOMP;
                                cp[0] = skb->data[2];
                        }
-                       kfree_skb(skb);
+                       consume_skb(skb);
                        skb = new_skb;
                        cp = skb_put(skb, len + 2);
                        cp[0] = 0;
@@ -1703,7 +1703,7 @@ ppp_receive_nonmp_frame(struct ppp *ppp, struct sk_buff *skb)
                        }
                        skb_reserve(ns, 2);
                        skb_copy_bits(skb, 0, skb_put(ns, skb->len), skb->len);
-                       kfree_skb(skb);
+                       consume_skb(skb);
                        skb = ns;
                }
                else
@@ -1851,7 +1851,7 @@ ppp_decompress_frame(struct ppp *ppp, struct sk_buff *skb)
                        goto err;
                }
 
-               kfree_skb(skb);
+               consume_skb(skb);
                skb = ns;
                skb_put(skb, len);
                skb_pull(skb, 2);       /* pull off the A/C bytes */

diff --git a/drivers/net/ppp/ppp_synctty.c b/drivers/net/ppp/ppp_synctty.c
index 55e466c..1a12033 100644 (file)
--- a/drivers/net/ppp/ppp_synctty.c
+++ b/drivers/net/ppp/ppp_synctty.c
@@ -588,7 +588,7 @@ ppp_sync_txmunge(struct syncppp *ap, struct sk_buff *skb)
                        skb_reserve(npkt,2);
                        skb_copy_from_linear_data(skb,
                                      skb_put(npkt, skb->len), skb->len);
-                       kfree_skb(skb);
+                       consume_skb(skb);
                        skb = npkt;
                }
                skb_push(skb,2);
@@ -656,7 +656,7 @@ ppp_sync_push(struct syncppp *ap)
                        if (sent < ap->tpkt->len) {
                                tty_stuffed = 1;
                        } else {
-                               kfree_skb(ap->tpkt);
+                               consume_skb(ap->tpkt);
                                ap->tpkt = NULL;
                                clear_bit(XMIT_FULL, &ap->xmit_flags);
                                done = 1;

diff --git a/drivers/net/ppp/pppoe.c b/drivers/net/ppp/pppoe.c
index dd15b8f..cbf7047 100644 (file)
--- a/drivers/net/ppp/pppoe.c
+++ b/drivers/net/ppp/pppoe.c
@@ -984,8 +984,10 @@ static int pppoe_recvmsg(struct kiocb *iocb, struct socket *sock,
        if (skb) {
                total_len = min_t(size_t, total_len, skb->len);
                error = skb_copy_datagram_iovec(skb, 0, m->msg_iov, total_len);
-               if (error == 0)
-                       error = total_len;
+               if (error == 0) {
+                       consume_skb(skb);
+                       return total_len;
+               }
        }
 
        kfree_skb(skb);

diff --git a/drivers/net/ppp/pptp.c b/drivers/net/ppp/pptp.c
index 72b50f5..1c98321 100644 (file)
--- a/drivers/net/ppp/pptp.c
+++ b/drivers/net/ppp/pptp.c
@@ -209,7 +209,7 @@ static int pptp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
                }
                if (skb->sk)
                        skb_set_owner_w(new_skb, skb->sk);
-               kfree_skb(skb);
+               consume_skb(skb);
                skb = new_skb;
        }