[SCTP] Minor warning cleanups.

include/net/sctp/structs.h

@@ -1706,8 +1706,8 @@ __u32 sctp_association_get_next_tsn(struct sctp_association *);
 __u32 sctp_association_get_tsn_block(struct sctp_association *, int);
 
 void sctp_assoc_sync_pmtu(struct sctp_association *);
-void sctp_assoc_rwnd_increase(struct sctp_association *, int);
-void sctp_assoc_rwnd_decrease(struct sctp_association *, int);
+void sctp_assoc_rwnd_increase(struct sctp_association *, unsigned);
+void sctp_assoc_rwnd_decrease(struct sctp_association *, unsigned);
 void sctp_assoc_set_primary(struct sctp_association *,
 			    struct sctp_transport *);
 int sctp_assoc_set_bind_addr_from_ep(struct sctp_association *, int);

net/sctp/associola.c

@@ -1061,7 +1061,7 @@ static inline int sctp_peer_needs_update(struct sctp_association *asoc)
 }
 
 /* Increase asoc's rwnd by len and send any window update SACK if needed. */
-void sctp_assoc_rwnd_increase(struct sctp_association *asoc, int len)
+void sctp_assoc_rwnd_increase(struct sctp_association *asoc, unsigned len)
 {
 	struct sctp_chunk *sack;
 	struct timer_list *timer;
@@ -1107,7 +1107,7 @@ void sctp_assoc_rwnd_increase(struct sctp_association *asoc, int len)
 }
 
 /* Decrease asoc's rwnd by len. */
-void sctp_assoc_rwnd_decrease(struct sctp_association *asoc, int len)
+void sctp_assoc_rwnd_decrease(struct sctp_association *asoc, unsigned len)
 {
 	SCTP_ASSERT(asoc->rwnd, "rwnd zero", return);
 	SCTP_ASSERT(!asoc->rwnd_over, "rwnd_over not zero", return);

net/sctp/outqueue.c

@@ -1012,7 +1012,7 @@ int sctp_outq_sack(struct sctp_outq *q, struct sctp_sackhdr *sack)
 	__u32 sack_ctsn, ctsn, tsn;
 	__u32 highest_tsn, highest_new_tsn;
 	__u32 sack_a_rwnd;
-	int outstanding;
+	unsigned outstanding;
 	struct sctp_transport *primary = asoc->peer.primary_path;
 	int count_of_newacks = 0;
 

net/sctp/sm_make_chunk.c

@@ -1356,7 +1356,7 @@ struct sctp_association *sctp_unpack_cookie(
 	int headersize, bodysize, fixed_size;
 	__u8 digest[SCTP_SIGNATURE_SIZE];
 	struct scatterlist sg;
-	unsigned int keylen;
+	unsigned int keylen, len;
 	char *key;
 	sctp_scope_t scope;
 	struct sk_buff *skb = chunk->skb;
@@ -1369,8 +1369,8 @@ struct sctp_association *sctp_unpack_cookie(
 	 * There must be enough room for our cookie and our peer's
 	 * INIT chunk.
 	 */
-	if (ntohs(chunk->chunk_hdr->length) <
-	    (fixed_size + sizeof(sctp_chunkhdr_t)))
+	len = ntohs(chunk->chunk_hdr->length);
+	if (len < fixed_size + sizeof(struct sctp_chunkhdr))
 		goto malformed;
 
 	/* Verify that the cookie has been padded out. */
@@ -1454,7 +1454,7 @@ struct sctp_association *sctp_unpack_cookie(
 	retval->peer.port = ntohs(chunk->sctp_hdr->source);
 
 	/* Populate the association from the cookie.  */
-	retval->c = *bear_cookie;
+	memcpy(&retval->c, bear_cookie, sizeof(*bear_cookie));
 
 	if (sctp_assoc_set_bind_addr_from_cookie(retval, bear_cookie,
 						 GFP_ATOMIC) < 0) {

net/sctp/sm_statefuns.c

@@ -1948,22 +1948,23 @@ sctp_disposition_t sctp_sf_do_9_1_abort(const struct sctp_endpoint *ep,
 					sctp_cmd_seq_t *commands)
 {
 	struct sctp_chunk *chunk = arg;
+	unsigned len;
 	__u16 error = SCTP_ERROR_NO_ERROR;
 
 	if (!sctp_vtag_verify_either(chunk, asoc))
 		return sctp_sf_pdiscard(ep, asoc, type, arg, commands);
 
-	if (chunk && (ntohs(chunk->chunk_hdr->length) >=
-			(sizeof(struct sctp_chunkhdr) +
-			sizeof(struct sctp_errhdr))))
+	/* Check that chunk header looks valid.  */
+	len = ntohs(chunk->chunk_hdr->length);
+	if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_errhdr))
 		error = ((sctp_errhdr_t *)chunk->skb->data)->cause;
 
+
  	/* ASSOC_FAILED will DELETE_TCB. */
 	sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(error));
 	SCTP_INC_STATS(SctpAborteds);
 	SCTP_DEC_STATS(SctpCurrEstab);
 
-	/* BUG?  This does not look complete... */
 	return SCTP_DISPOSITION_ABORT;
 }
 
@@ -1979,6 +1980,7 @@ sctp_disposition_t sctp_sf_cookie_wait_abort(const struct sctp_endpoint *ep,
 				     sctp_cmd_seq_t *commands)
 {
 	struct sctp_chunk *chunk = arg;
+	unsigned len;
 	__u16 error = SCTP_ERROR_NO_ERROR;
 
 	if (!sctp_vtag_verify_either(chunk, asoc))
@@ -1990,9 +1992,9 @@ sctp_disposition_t sctp_sf_cookie_wait_abort(const struct sctp_endpoint *ep,
 	sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP,
 			SCTP_TO(SCTP_EVENT_TIMEOUT_T1_INIT));
 
-	if (chunk && (ntohs(chunk->chunk_hdr->length) >=
-			(sizeof(struct sctp_chunkhdr) +
-			sizeof(struct sctp_errhdr))))
+	/* Check that chunk header looks valid.  */
+	len = ntohs(chunk->chunk_hdr->length);
+	if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_errhdr))
 		error = ((sctp_errhdr_t *)chunk->skb->data)->cause;
 
 	/* CMD_INIT_FAILED will DELETE_TCB. */