X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=net%2Fax25%2Fax25_out.c;h=bf706f83a5c9b123d2a14f210a7fe19510030590;hb=220264733d3fb126c5ffd71ce897d918ce491c62;hp=223835092b7afe743ca7d1050e9fe473457652b6;hpb=6f8c480f998a619082f18407f8d7f4c29e94dc6e;p=linux-2.6-omap-h63xx.git

diff --git a/net/ax25/ax25_out.c b/net/ax25/ax25_out.c
index 223835092b7..bf706f83a5c 100644
--- a/net/ax25/ax25_out.c
+++ b/net/ax25/ax25_out.c
@@ -117,6 +117,12 @@ void ax25_output(ax25_cb *ax25, int paclen, struct sk_buff *skb)
 	unsigned char *p;
 	int frontlen, len, fragno, ka9qfrag, first = 1;
 
+	if (paclen < 16) {
+		WARN_ON_ONCE(1);
+		kfree_skb(skb);
+		return;
+	}
+
 	if ((skb->len - 1) > paclen) {
 		if (*skb->data == AX25_P_TEXT) {
 			skb_pull(skb, 1); /* skip PID */
@@ -148,8 +154,9 @@ void ax25_output(ax25_cb *ax25, int paclen, struct sk_buff *skb)
 
 			if (ka9qfrag == 1) {
 				skb_reserve(skbn, frontlen + 2);
-				skbn->nh.raw = skbn->data + (skb->nh.raw - skb->data);
-				memcpy(skb_put(skbn, len), skb->data, len);
+				skb_set_network_header(skbn,
+						      skb_network_offset(skb));
+				skb_copy_from_linear_data(skb, skb_put(skbn, len), len);
 				p = skb_push(skbn, 2);
 
 				*p++ = AX25_P_SEGMENT;
@@ -161,8 +168,9 @@ void ax25_output(ax25_cb *ax25, int paclen, struct sk_buff *skb)
 				}
 			} else {
 				skb_reserve(skbn, frontlen + 1);
-				skbn->nh.raw = skbn->data + (skb->nh.raw - skb->data);
-				memcpy(skb_put(skbn, len), skb->data, len);
+				skb_set_network_header(skbn,
+						      skb_network_offset(skb));
+				skb_copy_from_linear_data(skb, skb_put(skbn, len), len);
 				p = skb_push(skbn, 1);
 				*p = AX25_P_TEXT;
 			}
@@ -205,7 +213,7 @@ static void ax25_send_iframe(ax25_cb *ax25, struct sk_buff *skb, int poll_bit)
 	if (skb == NULL)
 		return;
 
-	skb->nh.raw = skb->data;
+	skb_reset_network_header(skb);
 
 	if (ax25->modulus == AX25_MODULUS) {
 		frame = skb_push(skb, 1);
@@ -249,8 +257,6 @@ void ax25_kick(ax25_cb *ax25)
 	if (start == end)
 		return;
 
-	ax25->vs = start;
-
 	/*
 	 * Transmit data until either we're out of data to send or
 	 * the window is full. Send a poll on the final I frame if
@@ -259,8 +265,13 @@ void ax25_kick(ax25_cb *ax25)
 
 	/*
 	 * Dequeue the frame and copy it.
+	 * Check for race with ax25_clear_queues().
 	 */
 	skb  = skb_dequeue(&ax25->write_queue);
+	if (!skb)
+		return;
+
+	ax25->vs = start;
 
 	do {
 		if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {