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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/net/xfrm/xfrm_user.c
..
..
@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
1
2
 /* xfrm_user.c: User interface to configure xfrm engine.
2
3
  *
3
4
  * Copyright (C) 2002 David S. Miller (davem@redhat.com)
..
..
@@ -521,7 +522,7 @@
521
522
 	struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
522
523
 	struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
523
524
 
524
-	if (re) {
525
+	if (re && x->replay_esn && x->preplay_esn) {
525
526
 		struct xfrm_replay_state_esn *replay_esn;
526
527
 		replay_esn = nla_data(re);
527
528
 		memcpy(x->replay_esn, replay_esn,
..
..
@@ -620,13 +621,8 @@
620
621
 
621
622
 	xfrm_smark_init(attrs, &x->props.smark);
622
623
 
623
-	if (attrs[XFRMA_IF_ID]) {
624
+	if (attrs[XFRMA_IF_ID])
624
625
 		x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
625
-		if (!x->if_id) {
626
-			err = -EINVAL;
627
-			goto error;
628
-		}
629
-	}
630
626
 
631
627
 	err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
632
628
 	if (err)
..
..
@@ -1043,8 +1039,8 @@
1043
1039
 		u8 proto = 0;
1044
1040
 		int err;
1045
1041
 
1046
-		err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, xfrma_policy,
1047
-				  NULL);
1042
+		err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX,
1043
+					     xfrma_policy, cb->extack);
1048
1044
 		if (err < 0)
1049
1045
 			return err;
1050
1046
 
..
..
@@ -1053,6 +1049,15 @@
1053
1049
 					 sizeof(*filter), GFP_KERNEL);
1054
1050
 			if (filter == NULL)
1055
1051
 				return -ENOMEM;
1052
+
1053
+			/* see addr_match(), (prefix length >> 5) << 2
1054
+			 * will be used to compare xfrm_address_t
1055
+			 */
1056
+			if (filter->splen > (sizeof(xfrm_address_t) << 3) ||
1057
+			    filter->dplen > (sizeof(xfrm_address_t) << 3)) {
1058
+				kfree(filter);
1059
+				return -EINVAL;
1060
+			}
1056
1061
 		}
1057
1062
 
1058
1063
 		if (attrs[XFRMA_PROTO])
..
..
@@ -1357,13 +1362,8 @@
1357
1362
 
1358
1363
 	mark = xfrm_mark_get(attrs, &m);
1359
1364
 
1360
-	if (attrs[XFRMA_IF_ID]) {
1365
+	if (attrs[XFRMA_IF_ID])
1361
1366
 		if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1362
-		if (!if_id) {
1363
-			err = -EINVAL;
1364
-			goto out_noput;
1365
-		}
1366
-	}
1367
1367
 
1368
1368
 	if (p->info.seq) {
1369
1369
 		x = xfrm_find_acq_byseq(net, mark, p->info.seq);
..
..
@@ -1676,13 +1676,8 @@
1676
1676
 
1677
1677
 	xfrm_mark_get(attrs, &xp->mark);
1678
1678
 
1679
-	if (attrs[XFRMA_IF_ID]) {
1679
+	if (attrs[XFRMA_IF_ID])
1680
1680
 		xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1681
-		if (!xp->if_id) {
1682
-			err = -EINVAL;
1683
-			goto error;
1684
-		}
1685
-	}
1686
1681
 
1687
1682
 	return xp;
1688
1683
  error:
..
..
@@ -1926,7 +1921,6 @@
1926
1921
 	struct km_event c;
1927
1922
 	int delete;
1928
1923
 	struct xfrm_mark m;
1929
-	u32 mark = xfrm_mark_get(attrs, &m);
1930
1924
 	u32 if_id = 0;
1931
1925
 
1932
1926
 	p = nlmsg_data(nlh);
..
..
@@ -1943,8 +1937,11 @@
1943
1937
 	if (attrs[XFRMA_IF_ID])
1944
1938
 		if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1945
1939
 
1940
+	xfrm_mark_get(attrs, &m);
1941
+
1946
1942
 	if (p->index)
1947
-		xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, delete, &err);
1943
+		xp = xfrm_policy_byid(net, &m, if_id, type, p->dir,
1944
+				      p->index, delete, &err);
1948
1945
 	else {
1949
1946
 		struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1950
1947
 		struct xfrm_sec_ctx *ctx;
..
..
@@ -1961,8 +1958,8 @@
1961
1958
 			if (err)
1962
1959
 				return err;
1963
1960
 		}
1964
-		xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir, &p->sel,
1965
-					   ctx, delete, &err);
1961
+		xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir,
1962
+					   &p->sel, ctx, delete, &err);
1966
1963
 		security_xfrm_policy_free(ctx);
1967
1964
 	}
1968
1965
 	if (xp == NULL)
..
..
@@ -2229,7 +2226,6 @@
2229
2226
 	u8 type = XFRM_POLICY_TYPE_MAIN;
2230
2227
 	int err = -ENOENT;
2231
2228
 	struct xfrm_mark m;
2232
-	u32 mark = xfrm_mark_get(attrs, &m);
2233
2229
 	u32 if_id = 0;
2234
2230
 
2235
2231
 	err = copy_from_user_policy_type(&type, attrs);
..
..
@@ -2243,8 +2239,11 @@
2243
2239
 	if (attrs[XFRMA_IF_ID])
2244
2240
 		if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2245
2241
 
2242
+	xfrm_mark_get(attrs, &m);
2243
+
2246
2244
 	if (p->index)
2247
-		xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, 0, &err);
2245
+		xp = xfrm_policy_byid(net, &m, if_id, type, p->dir, p->index,
2246
+				      0, &err);
2248
2247
 	else {
2249
2248
 		struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2250
2249
 		struct xfrm_sec_ctx *ctx;
..
..
@@ -2261,7 +2260,7 @@
2261
2260
 			if (err)
2262
2261
 				return err;
2263
2262
 		}
2264
-		xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir,
2263
+		xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir,
2265
2264
 					   &p->sel, ctx, 0, &err);
2266
2265
 		security_xfrm_policy_free(ctx);
2267
2266
 	}
..
..
@@ -2433,6 +2432,7 @@
2433
2432
 	int n = 0;
2434
2433
 	struct net *net = sock_net(skb->sk);
2435
2434
 	struct xfrm_encap_tmpl  *encap = NULL;
2435
+	u32 if_id = 0;
2436
2436
 
2437
2437
 	if (attrs[XFRMA_MIGRATE] == NULL)
2438
2438
 		return -EINVAL;
..
..
@@ -2457,7 +2457,10 @@
2457
2457
 			return 0;
2458
2458
 	}
2459
2459
 
2460
-	err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2460
+	if (attrs[XFRMA_IF_ID])
2461
+		if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2462
+
2463
+	err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap, if_id);
2461
2464
 
2462
2465
 	kfree(encap);
2463
2466
 
..
..
@@ -2630,7 +2633,7 @@
2630
2633
 	[XFRMA_ALG_COMP]	= { .len = sizeof(struct xfrm_algo) },
2631
2634
 	[XFRMA_ENCAP]		= { .len = sizeof(struct xfrm_encap_tmpl) },
2632
2635
 	[XFRMA_TMPL]		= { .len = sizeof(struct xfrm_user_tmpl) },
2633
-	[XFRMA_SEC_CTX]		= { .len = sizeof(struct xfrm_sec_ctx) },
2636
+	[XFRMA_SEC_CTX]		= { .len = sizeof(struct xfrm_user_sec_ctx) },
2634
2637
 	[XFRMA_LTIME_VAL]	= { .len = sizeof(struct xfrm_lifetime_cur) },
2635
2638
 	[XFRMA_REPLAY_VAL]	= { .len = sizeof(struct xfrm_replay_state) },
2636
2639
 	[XFRMA_REPLAY_THRESH]	= { .type = NLA_U32 },
..
..
@@ -2751,9 +2754,9 @@
2751
2754
 		goto err;
2752
2755
 	}
2753
2756
 
2754
-	err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2755
-			  link->nla_max ? : XFRMA_MAX,
2756
-			  link->nla_pol ? : xfrma_policy, extack);
2757
+	err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs,
2758
+				     link->nla_max ? : XFRMA_MAX,
2759
+				     link->nla_pol ? : xfrma_policy, extack);
2757
2760
 	if (err < 0)
2758
2761
 		goto err;
2759
2762
 
..
..
@@ -2764,6 +2767,16 @@
2764
2767
 
2765
2768
 	err = link->doit(skb, nlh, attrs);
2766
2769
 
2770
+	/* We need to free skb allocated in xfrm_alloc_compat() before
2771
+	 * returning from this function, because consume_skb() won't take
2772
+	 * care of frag_list since netlink destructor sets
2773
+	 * sbk->head to NULL. (see netlink_skb_destructor())
2774
+	 */
2775
+	if (skb_has_frag_list(skb)) {
2776
+		kfree_skb(skb_shinfo(skb)->frag_list);
2777
+		skb_shinfo(skb)->frag_list = NULL;
2778
+	}
2779
+
2767
2780
 err:
2768
2781
 	kvfree(nlh64);
2769
2782
 	return err;