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2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/net/sctp/sm_make_chunk.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /* SCTP kernel implementation
23  * (C) Copyright IBM Corp. 2001, 2004
34  * Copyright (c) 1999-2000 Cisco, Inc.
....@@ -9,22 +10,6 @@
910  * These functions work with the state functions in sctp_sm_statefuns.c
1011  * to implement the state operations.  These functions implement the
1112  * steps which require modifying existing data structures.
12
- *
13
- * This SCTP implementation is free software;
14
- * you can redistribute it and/or modify it under the terms of
15
- * the GNU General Public License as published by
16
- * the Free Software Foundation; either version 2, or (at your option)
17
- * any later version.
18
- *
19
- * This SCTP implementation is distributed in the hope that it
20
- * will be useful, but WITHOUT ANY WARRANTY; without even the implied
21
- *                 ************************
22
- * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
23
- * See the GNU General Public License for more details.
24
- *
25
- * You should have received a copy of the GNU General Public License
26
- * along with GNU CC; see the file COPYING.  If not, see
27
- * <http://www.gnu.org/licenses/>.
2813  *
2914  * Please send any bug reports or fixes you make to the
3015  * email address(es):
....@@ -222,7 +207,6 @@
222207 				  const struct sctp_bind_addr *bp,
223208 				  gfp_t gfp, int vparam_len)
224209 {
225
-	struct net *net = sock_net(asoc->base.sk);
226210 	struct sctp_supported_ext_param ext_param;
227211 	struct sctp_adaptation_ind_param aiparam;
228212 	struct sctp_paramhdr *auth_chunks = NULL;
....@@ -260,9 +244,11 @@
260244 
261245 	chunksize = sizeof(init) + addrs_len;
262246 	chunksize += SCTP_PAD4(SCTP_SAT_LEN(num_types));
263
-	chunksize += sizeof(ecap_param);
264247 
265
-	if (asoc->prsctp_enable)
248
+	if (asoc->ep->ecn_enable)
249
+		chunksize += sizeof(ecap_param);
250
+
251
+	if (asoc->ep->prsctp_enable)
266252 		chunksize += sizeof(prsctp_param);
267253 
268254 	/* ADDIP: Section 4.2.7:
....@@ -270,13 +256,13 @@
270256 	 *  the ASCONF,the ASCONF-ACK, and the AUTH  chunks in its INIT and
271257 	 *  INIT-ACK parameters.
272258 	 */
273
-	if (net->sctp.addip_enable) {
259
+	if (asoc->ep->asconf_enable) {
274260 		extensions[num_ext] = SCTP_CID_ASCONF;
275261 		extensions[num_ext+1] = SCTP_CID_ASCONF_ACK;
276262 		num_ext += 2;
277263 	}
278264 
279
-	if (asoc->reconf_enable) {
265
+	if (asoc->ep->reconf_enable) {
280266 		extensions[num_ext] = SCTP_CID_RECONF;
281267 		num_ext += 1;
282268 	}
....@@ -284,7 +270,7 @@
284270 	if (sp->adaptation_ind)
285271 		chunksize += sizeof(aiparam);
286272 
287
-	if (sp->strm_interleave) {
273
+	if (asoc->ep->intl_enable) {
288274 		extensions[num_ext] = SCTP_CID_I_DATA;
289275 		num_ext += 1;
290276 	}
....@@ -351,7 +337,8 @@
351337 	sctp_addto_chunk(retval, sizeof(sat), &sat);
352338 	sctp_addto_chunk(retval, num_types * sizeof(__u16), &types);
353339 
354
-	sctp_addto_chunk(retval, sizeof(ecap_param), &ecap_param);
340
+	if (asoc->ep->ecn_enable)
341
+		sctp_addto_chunk(retval, sizeof(ecap_param), &ecap_param);
355342 
356343 	/* Add the supported extensions parameter.  Be nice and add this
357344 	 * fist before addiding the parameters for the extensions themselves
....@@ -363,7 +350,7 @@
363350 		sctp_addto_param(retval, num_ext, extensions);
364351 	}
365352 
366
-	if (asoc->prsctp_enable)
353
+	if (asoc->ep->prsctp_enable)
367354 		sctp_addto_chunk(retval, sizeof(prsctp_param), &prsctp_param);
368355 
369356 	if (sp->adaptation_ind) {
....@@ -453,7 +440,7 @@
453440 	if (sp->adaptation_ind)
454441 		chunksize += sizeof(aiparam);
455442 
456
-	if (asoc->intl_enable) {
443
+	if (asoc->peer.intl_capable) {
457444 		extensions[num_ext] = SCTP_CID_I_DATA;
458445 		num_ext += 1;
459446 	}
....@@ -1248,7 +1235,7 @@
12481235 
12491236 /* Create an Operation Error chunk of a fixed size, specifically,
12501237  * min(asoc->pathmtu, SCTP_DEFAULT_MAXSEGMENT) - overheads.
1251
- * This is a helper function to allocate an error chunk for for those
1238
+ * This is a helper function to allocate an error chunk for those
12521239  * invalid parameter codes in which we may not want to report all the
12531240  * errors, if the incoming chunk is large. If it can't fit in a single
12541241  * packet, we ignore it.
....@@ -1683,18 +1670,14 @@
16831670 	       ntohs(init_chunk->chunk_hdr->length), raw_addrs, addrs_len);
16841671 
16851672 	if (sctp_sk(ep->base.sk)->hmac) {
1686
-		SHASH_DESC_ON_STACK(desc, sctp_sk(ep->base.sk)->hmac);
1673
+		struct crypto_shash *tfm = sctp_sk(ep->base.sk)->hmac;
16871674 		int err;
16881675 
16891676 		/* Sign the message.  */
1690
-		desc->tfm = sctp_sk(ep->base.sk)->hmac;
1691
-		desc->flags = 0;
1692
-
1693
-		err = crypto_shash_setkey(desc->tfm, ep->secret_key,
1677
+		err = crypto_shash_setkey(tfm, ep->secret_key,
16941678 					  sizeof(ep->secret_key)) ?:
1695
-		      crypto_shash_digest(desc, (u8 *)&cookie->c, bodysize,
1696
-					  cookie->signature);
1697
-		shash_desc_zero(desc);
1679
+		      crypto_shash_tfm_digest(tfm, (u8 *)&cookie->c, bodysize,
1680
+					      cookie->signature);
16981681 		if (err)
16991682 			goto free_cookie;
17001683 	}
....@@ -1755,18 +1738,13 @@
17551738 
17561739 	/* Check the signature.  */
17571740 	{
1758
-		SHASH_DESC_ON_STACK(desc, sctp_sk(ep->base.sk)->hmac);
1741
+		struct crypto_shash *tfm = sctp_sk(ep->base.sk)->hmac;
17591742 		int err;
17601743 
1761
-		desc->tfm = sctp_sk(ep->base.sk)->hmac;
1762
-		desc->flags = 0;
1763
-
1764
-		err = crypto_shash_setkey(desc->tfm, ep->secret_key,
1744
+		err = crypto_shash_setkey(tfm, ep->secret_key,
17651745 					  sizeof(ep->secret_key)) ?:
1766
-		      crypto_shash_digest(desc, (u8 *)bear_cookie, bodysize,
1767
-					  digest);
1768
-		shash_desc_zero(desc);
1769
-
1746
+		      crypto_shash_tfm_digest(tfm, (u8 *)bear_cookie, bodysize,
1747
+					      digest);
17701748 		if (err) {
17711749 			*error = -SCTP_IERROR_NOMEM;
17721750 			goto fail;
....@@ -1802,7 +1780,7 @@
18021780 	 * for init collision case of lost COOKIE ACK.
18031781 	 * If skb has been timestamped, then use the stamp, otherwise
18041782 	 * use current time.  This introduces a small possibility that
1805
-	 * that a cookie may be considered expired, but his would only slow
1783
+	 * a cookie may be considered expired, but this would only slow
18061784 	 * down the new association establishment instead of every packet.
18071785 	 */
18081786 	if (sock_flag(ep->base.sk, SOCK_TIMESTAMP))
....@@ -1985,7 +1963,9 @@
19851963 	return 0;
19861964 }
19871965 
1988
-static int sctp_verify_ext_param(struct net *net, union sctp_params param)
1966
+static int sctp_verify_ext_param(struct net *net,
1967
+				 const struct sctp_endpoint *ep,
1968
+				 union sctp_params param)
19891969 {
19901970 	__u16 num_ext = ntohs(param.p->length) - sizeof(struct sctp_paramhdr);
19911971 	int have_asconf = 0;
....@@ -2012,7 +1992,7 @@
20121992 	if (net->sctp.addip_noauth)
20131993 		return 1;
20141994 
2015
-	if (net->sctp.addip_enable && !have_auth && have_asconf)
1995
+	if (ep->asconf_enable && !have_auth && have_asconf)
20161996 		return 0;
20171997 
20181998 	return 1;
....@@ -2022,18 +2002,16 @@
20222002 				   union sctp_params param)
20232003 {
20242004 	__u16 num_ext = ntohs(param.p->length) - sizeof(struct sctp_paramhdr);
2025
-	struct net *net = sock_net(asoc->base.sk);
20262005 	int i;
20272006 
20282007 	for (i = 0; i < num_ext; i++) {
20292008 		switch (param.ext->chunks[i]) {
20302009 		case SCTP_CID_RECONF:
2031
-			if (asoc->reconf_enable &&
2032
-			    !asoc->peer.reconf_capable)
2010
+			if (asoc->ep->reconf_enable)
20332011 				asoc->peer.reconf_capable = 1;
20342012 			break;
20352013 		case SCTP_CID_FWD_TSN:
2036
-			if (asoc->prsctp_enable && !asoc->peer.prsctp_capable)
2014
+			if (asoc->ep->prsctp_enable)
20372015 				asoc->peer.prsctp_capable = 1;
20382016 			break;
20392017 		case SCTP_CID_AUTH:
....@@ -2045,12 +2023,12 @@
20452023 			break;
20462024 		case SCTP_CID_ASCONF:
20472025 		case SCTP_CID_ASCONF_ACK:
2048
-			if (net->sctp.addip_enable)
2026
+			if (asoc->ep->asconf_enable)
20492027 				asoc->peer.asconf_capable = 1;
20502028 			break;
20512029 		case SCTP_CID_I_DATA:
2052
-			if (sctp_sk(asoc->base.sk)->strm_interleave)
2053
-				asoc->intl_enable = 1;
2030
+			if (asoc->ep->intl_enable)
2031
+				asoc->peer.intl_capable = 1;
20542032 			break;
20552033 		default:
20562034 			break;
....@@ -2099,7 +2077,7 @@
20992077 		break;
21002078 	case SCTP_PARAM_ACTION_DISCARD_ERR:
21012079 		retval =  SCTP_IERROR_ERROR;
2102
-		/* Fall through */
2080
+		fallthrough;
21032081 	case SCTP_PARAM_ACTION_SKIP_ERR:
21042082 		/* Make an ERROR chunk, preparing enough room for
21052083 		 * returning multiple unknown parameters.
....@@ -2167,13 +2145,13 @@
21672145 		break;
21682146 
21692147 	case SCTP_PARAM_SUPPORTED_EXT:
2170
-		if (!sctp_verify_ext_param(net, param))
2148
+		if (!sctp_verify_ext_param(net, ep, param))
21712149 			return SCTP_IERROR_ABORT;
21722150 		break;
21732151 
21742152 	case SCTP_PARAM_SET_PRIMARY:
2175
-		if (!net->sctp.addip_enable)
2176
-			goto fallthrough;
2153
+		if (!ep->asconf_enable)
2154
+			goto unhandled;
21772155 
21782156 		if (ntohs(param.p->length) < sizeof(struct sctp_addip_param) +
21792157 					     sizeof(struct sctp_paramhdr)) {
....@@ -2192,11 +2170,11 @@
21922170 	case SCTP_PARAM_FWD_TSN_SUPPORT:
21932171 		if (ep->prsctp_enable)
21942172 			break;
2195
-		goto fallthrough;
2173
+		goto unhandled;
21962174 
21972175 	case SCTP_PARAM_RANDOM:
21982176 		if (!ep->auth_enable)
2199
-			goto fallthrough;
2177
+			goto unhandled;
22002178 
22012179 		/* SCTP-AUTH: Secion 6.1
22022180 		 * If the random number is not 32 byte long the association
....@@ -2213,7 +2191,7 @@
22132191 
22142192 	case SCTP_PARAM_CHUNKS:
22152193 		if (!ep->auth_enable)
2216
-			goto fallthrough;
2194
+			goto unhandled;
22172195 
22182196 		/* SCTP-AUTH: Section 3.2
22192197 		 * The CHUNKS parameter MUST be included once in the INIT or
....@@ -2229,7 +2207,7 @@
22292207 
22302208 	case SCTP_PARAM_HMAC_ALGO:
22312209 		if (!ep->auth_enable)
2232
-			goto fallthrough;
2210
+			goto unhandled;
22332211 
22342212 		hmacs = (struct sctp_hmac_algo_param *)param.p;
22352213 		n_elt = (ntohs(param.p->length) -
....@@ -2252,7 +2230,7 @@
22522230 			retval = SCTP_IERROR_ABORT;
22532231 		}
22542232 		break;
2255
-fallthrough:
2233
+unhandled:
22562234 	default:
22572235 		pr_debug("%s: unrecognized param:%d for chunk:%d\n",
22582236 			 __func__, ntohs(param.p->type), cid);
....@@ -2333,7 +2311,6 @@
23332311 		      const union sctp_addr *peer_addr,
23342312 		      struct sctp_init_chunk *peer_init, gfp_t gfp)
23352313 {
2336
-	struct net *net = sock_net(asoc->base.sk);
23372314 	struct sctp_transport *transport;
23382315 	struct list_head *pos, *temp;
23392316 	union sctp_params param;
....@@ -2349,7 +2326,7 @@
23492326 
23502327 	/* This implementation defaults to making the first transport
23512328 	 * added as the primary transport.  The source address seems to
2352
-	 * be a a better choice than any of the embedded addresses.
2329
+	 * be a better choice than any of the embedded addresses.
23532330 	 */
23542331 	if (!sctp_assoc_add_peer(asoc, peer_addr, gfp, SCTP_ACTIVE))
23552332 		goto nomem;
....@@ -2391,8 +2368,8 @@
23912368 	 * also give us an option to silently ignore the packet, which
23922369 	 * is what we'll do here.
23932370 	 */
2394
-	if (!net->sctp.addip_noauth &&
2395
-	     (asoc->peer.asconf_capable && !asoc->peer.auth_capable)) {
2371
+	if (!asoc->base.net->sctp.addip_noauth &&
2372
+	    (asoc->peer.asconf_capable && !asoc->peer.auth_capable)) {
23962373 		asoc->peer.addip_disabled_mask |= (SCTP_PARAM_ADD_IP |
23972374 						  SCTP_PARAM_DEL_IP |
23982375 						  SCTP_PARAM_SET_PRIMARY);
....@@ -2519,9 +2496,9 @@
25192496 			      const union sctp_addr *peer_addr,
25202497 			      gfp_t gfp)
25212498 {
2522
-	struct net *net = sock_net(asoc->base.sk);
25232499 	struct sctp_endpoint *ep = asoc->ep;
25242500 	union sctp_addr_param *addr_param;
2501
+	struct net *net = asoc->base.net;
25252502 	struct sctp_transport *t;
25262503 	enum sctp_scope scope;
25272504 	union sctp_addr addr;
....@@ -2614,8 +2591,7 @@
26142591 	case SCTP_PARAM_STATE_COOKIE:
26152592 		asoc->peer.cookie_len =
26162593 			ntohs(param.p->length) - sizeof(struct sctp_paramhdr);
2617
-		if (asoc->peer.cookie)
2618
-			kfree(asoc->peer.cookie);
2594
+		kfree(asoc->peer.cookie);
26192595 		asoc->peer.cookie = kmemdup(param.cookie->body, asoc->peer.cookie_len, gfp);
26202596 		if (!asoc->peer.cookie)
26212597 			retval = 0;
....@@ -2630,15 +2606,20 @@
26302606 		break;
26312607 
26322608 	case SCTP_PARAM_ECN_CAPABLE:
2633
-		asoc->peer.ecn_capable = 1;
2634
-		break;
2609
+		if (asoc->ep->ecn_enable) {
2610
+			asoc->peer.ecn_capable = 1;
2611
+			break;
2612
+		}
2613
+		/* Fall Through */
2614
+		goto fall_through;
2615
+
26352616 
26362617 	case SCTP_PARAM_ADAPTATION_LAYER_IND:
26372618 		asoc->peer.adaptation_ind = ntohl(param.aind->adaptation_ind);
26382619 		break;
26392620 
26402621 	case SCTP_PARAM_SET_PRIMARY:
2641
-		if (!net->sctp.addip_enable)
2622
+		if (!ep->asconf_enable)
26422623 			goto fall_through;
26432624 
26442625 		addr_param = param.v + sizeof(struct sctp_addip_param);
....@@ -2666,7 +2647,7 @@
26662647 		break;
26672648 
26682649 	case SCTP_PARAM_FWD_TSN_SUPPORT:
2669
-		if (asoc->prsctp_enable) {
2650
+		if (asoc->ep->prsctp_enable) {
26702651 			asoc->peer.prsctp_capable = 1;
26712652 			break;
26722653 		}
....@@ -2678,8 +2659,7 @@
26782659 			goto fall_through;
26792660 
26802661 		/* Save peer's random parameter */
2681
-		if (asoc->peer.peer_random)
2682
-			kfree(asoc->peer.peer_random);
2662
+		kfree(asoc->peer.peer_random);
26832663 		asoc->peer.peer_random = kmemdup(param.p,
26842664 					    ntohs(param.p->length), gfp);
26852665 		if (!asoc->peer.peer_random) {
....@@ -2693,8 +2673,7 @@
26932673 			goto fall_through;
26942674 
26952675 		/* Save peer's HMAC list */
2696
-		if (asoc->peer.peer_hmacs)
2697
-			kfree(asoc->peer.peer_hmacs);
2676
+		kfree(asoc->peer.peer_hmacs);
26982677 		asoc->peer.peer_hmacs = kmemdup(param.p,
26992678 					    ntohs(param.p->length), gfp);
27002679 		if (!asoc->peer.peer_hmacs) {
....@@ -2710,8 +2689,7 @@
27102689 		if (!ep->auth_enable)
27112690 			goto fall_through;
27122691 
2713
-		if (asoc->peer.peer_chunks)
2714
-			kfree(asoc->peer.peer_chunks);
2692
+		kfree(asoc->peer.peer_chunks);
27152693 		asoc->peer.peer_chunks = kmemdup(param.p,
27162694 					    ntohs(param.p->length), gfp);
27172695 		if (!asoc->peer.peer_chunks)