Merge branch 'linus' into x86/tracehook

4 files changed, 85 insertions, 25 deletions

diff --git a/net/sctp/auth.c b/net/sctp/auth.c
index 675a5c3e68a..52db5f60daa 100644
--- a/net/sctp/auth.c
+++ b/net/sctp/auth.c
@@ -80,6 +80,10 @@ static struct sctp_auth_bytes *sctp_auth_create_key(__u32 key_len, gfp_t gfp)
 {
 	struct sctp_auth_bytes *key;
 
+	/* Verify that we are not going to overflow INT_MAX */
+	if ((INT_MAX - key_len) < sizeof(struct sctp_auth_bytes))
+		return NULL;
+
 	/* Allocate the shared key */
 	key = kmalloc(sizeof(struct sctp_auth_bytes) + key_len, gfp);
 	if (!key)
@@ -782,6 +786,9 @@ int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep,
 	for (i = 0; i < hmacs->shmac_num_idents; i++) {
 		id = hmacs->shmac_idents[i];
 
+		if (id > SCTP_AUTH_HMAC_ID_MAX)
+			return -EOPNOTSUPP;
+
 		if (SCTP_AUTH_HMAC_ID_SHA1 == id)
 			has_sha1 = 1;
 
diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c
index e39a0cdef18..4c8d9f45ce0 100644
--- a/net/sctp/endpointola.c
+++ b/net/sctp/endpointola.c
@@ -103,6 +103,7 @@ static struct sctp_endpoint *sctp_endpoint_init(struct sctp_endpoint *ep,
 
 		/* Initialize the CHUNKS parameter */
 		auth_chunks->param_hdr.type = SCTP_PARAM_CHUNKS;
+		auth_chunks->param_hdr.length = htons(sizeof(sctp_paramhdr_t));
 
 		/* If the Add-IP functionality is enabled, we must
 		 * authenticate, ASCONF and ASCONF-ACK chunks
@@ -110,8 +111,7 @@ static struct sctp_endpoint *sctp_endpoint_init(struct sctp_endpoint *ep,
 		if (sctp_addip_enable) {
 			auth_chunks->chunks[0] = SCTP_CID_ASCONF;
 			auth_chunks->chunks[1] = SCTP_CID_ASCONF_ACK;
-			auth_chunks->param_hdr.length =
-					htons(sizeof(sctp_paramhdr_t) + 2);
+			auth_chunks->param_hdr.length += htons(2);
 		}
 	}
 
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 483a01d0740..47f91afa021 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -319,7 +319,8 @@ static void sctp_v6_get_saddr(struct sctp_sock *sk,
 			  __func__, asoc, dst, NIP6(daddr->v6.sin6_addr));
 
 	if (!asoc) {
-		ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL,
+		ipv6_dev_get_saddr(sock_net(sctp_opt2sk(sk)),
+				   dst ? ip6_dst_idev(dst)->dev : NULL,
 				   &daddr->v6.sin6_addr,
 				   inet6_sk(&sk->inet.sk)->srcprefs,
 				   &saddr->v6.sin6_addr);
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index dbb79adf8f3..5ffb9dec1c3 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3055,6 +3055,9 @@ static int sctp_setsockopt_auth_chunk(struct sock *sk,
 {
 	struct sctp_authchunk val;
 
+	if (!sctp_auth_enable)
+		return -EACCES;
+
 	if (optlen != sizeof(struct sctp_authchunk))
 		return -EINVAL;
 	if (copy_from_user(&val, optval, optlen))
@@ -3083,8 +3086,12 @@ static int sctp_setsockopt_hmac_ident(struct sock *sk,
 				    int optlen)
 {
 	struct sctp_hmacalgo *hmacs;
+	u32 idents;
 	int err;
 
+	if (!sctp_auth_enable)
+		return -EACCES;
+
 	if (optlen < sizeof(struct sctp_hmacalgo))
 		return -EINVAL;
 
@@ -3097,8 +3104,9 @@ static int sctp_setsockopt_hmac_ident(struct sock *sk,
 		goto out;
 	}
 
-	if (hmacs->shmac_num_idents == 0 ||
-	    hmacs->shmac_num_idents > SCTP_AUTH_NUM_HMACS) {
+	idents = hmacs->shmac_num_idents;
+	if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS ||
+	    (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo))) {
 		err = -EINVAL;
 		goto out;
 	}
@@ -3123,6 +3131,9 @@ static int sctp_setsockopt_auth_key(struct sock *sk,
 	struct sctp_association *asoc;
 	int ret;
 
+	if (!sctp_auth_enable)
+		return -EACCES;
+
 	if (optlen <= sizeof(struct sctp_authkey))
 		return -EINVAL;
 
@@ -3135,6 +3146,11 @@ static int sctp_setsockopt_auth_key(struct sock *sk,
 		goto out;
 	}
 
+	if (authkey->sca_keylength > optlen - sizeof(struct sctp_authkey)) {
+		ret = -EINVAL;
+		goto out;
+	}
+
 	asoc = sctp_id2assoc(sk, authkey->sca_assoc_id);
 	if (!asoc && authkey->sca_assoc_id && sctp_style(sk, UDP)) {
 		ret = -EINVAL;
@@ -3160,6 +3176,9 @@ static int sctp_setsockopt_active_key(struct sock *sk,
 	struct sctp_authkeyid val;
 	struct sctp_association *asoc;
 
+	if (!sctp_auth_enable)
+		return -EACCES;
+
 	if (optlen != sizeof(struct sctp_authkeyid))
 		return -EINVAL;
 	if (copy_from_user(&val, optval, optlen))
@@ -3185,6 +3204,9 @@ static int sctp_setsockopt_del_key(struct sock *sk,
 	struct sctp_authkeyid val;
 	struct sctp_association *asoc;
 
+	if (!sctp_auth_enable)
+		return -EACCES;
+
 	if (optlen != sizeof(struct sctp_authkeyid))
 		return -EINVAL;
 	if (copy_from_user(&val, optval, optlen))
@@ -5197,19 +5219,29 @@ static int sctp_getsockopt_maxburst(struct sock *sk, int len,
 static int sctp_getsockopt_hmac_ident(struct sock *sk, int len,
 				    char __user *optval, int __user *optlen)
 {
+	struct sctp_hmacalgo  __user *p = (void __user *)optval;
 	struct sctp_hmac_algo_param *hmacs;
-	__u16 param_len;
+	__u16 data_len = 0;
+	u32 num_idents;
+
+	if (!sctp_auth_enable)
+		return -EACCES;
 
 	hmacs = sctp_sk(sk)->ep->auth_hmacs_list;
-	param_len = ntohs(hmacs->param_hdr.length);
+	data_len = ntohs(hmacs->param_hdr.length) - sizeof(sctp_paramhdr_t);
 
-	if (len < param_len)
+	if (len < sizeof(struct sctp_hmacalgo) + data_len)
 		return -EINVAL;
+
+	len = sizeof(struct sctp_hmacalgo) + data_len;
+	num_idents = data_len / sizeof(u16);
+
 	if (put_user(len, optlen))
 		return -EFAULT;
-	if (copy_to_user(optval, hmacs->hmac_ids, len))
+	if (put_user(num_idents, &p->shmac_num_idents))
+		return -EFAULT;
+	if (copy_to_user(p->shmac_idents, hmacs->hmac_ids, data_len))
 		return -EFAULT;
-
 	return 0;
 }
 
@@ -5219,6 +5251,9 @@ static int sctp_getsockopt_active_key(struct sock *sk, int len,
 	struct sctp_authkeyid val;
 	struct sctp_association *asoc;
 
+	if (!sctp_auth_enable)
+		return -EACCES;
+
 	if (len < sizeof(struct sctp_authkeyid))
 		return -EINVAL;
 	if (copy_from_user(&val, optval, sizeof(struct sctp_authkeyid)))
@@ -5233,6 +5268,12 @@ static int sctp_getsockopt_active_key(struct sock *sk, int len,
 	else
 		val.scact_keynumber = sctp_sk(sk)->ep->active_key_id;
 
+	len = sizeof(struct sctp_authkeyid);
+	if (put_user(len, optlen))
+		return -EFAULT;
+	if (copy_to_user(optval, &val, len))
+		return -EFAULT;
+
 	return 0;
 }
 
@@ -5243,13 +5284,16 @@ static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len,
 	struct sctp_authchunks val;
 	struct sctp_association *asoc;
 	struct sctp_chunks_param *ch;
-	u32    num_chunks;
+	u32    num_chunks = 0;
 	char __user *to;
 
-	if (len <= sizeof(struct sctp_authchunks))
+	if (!sctp_auth_enable)
+		return -EACCES;
+
+	if (len < sizeof(struct sctp_authchunks))
 		return -EINVAL;
 
-	if (copy_from_user(&val, p, sizeof(struct sctp_authchunks)))
+	if (copy_from_user(&val, optval, sizeof(struct sctp_authchunks)))
 		return -EFAULT;
 
 	to = p->gauth_chunks;
@@ -5258,20 +5302,21 @@ static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len,
 		return -EINVAL;
 
 	ch = asoc->peer.peer_chunks;
+	if (!ch)
+		goto num;
 
 	/* See if the user provided enough room for all the data */
 	num_chunks = ntohs(ch->param_hdr.length) - sizeof(sctp_paramhdr_t);
 	if (len < num_chunks)
 		return -EINVAL;
 
-	len = num_chunks;
-	if (put_user(len, optlen))
+	if (copy_to_user(to, ch->chunks, num_chunks))
 		return -EFAULT;
+num:
+	len = sizeof(struct sctp_authchunks) + num_chunks;
+	if (put_user(len, optlen)) return -EFAULT;
 	if (put_user(num_chunks, &p->gauth_number_of_chunks))
 		return -EFAULT;
-	if (copy_to_user(to, ch->chunks, len))
-		return -EFAULT;
-
 	return 0;
 }
 
@@ -5282,13 +5327,16 @@ static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len,
 	struct sctp_authchunks val;
 	struct sctp_association *asoc;
 	struct sctp_chunks_param *ch;
-	u32    num_chunks;
+	u32    num_chunks = 0;
 	char __user *to;
 
-	if (len <= sizeof(struct sctp_authchunks))
+	if (!sctp_auth_enable)
+		return -EACCES;
+
+	if (len < sizeof(struct sctp_authchunks))
 		return -EINVAL;
 
-	if (copy_from_user(&val, p, sizeof(struct sctp_authchunks)))
+	if (copy_from_user(&val, optval, sizeof(struct sctp_authchunks)))
 		return -EFAULT;
 
 	to = p->gauth_chunks;
@@ -5301,17 +5349,21 @@ static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len,
 	else
 		ch = sctp_sk(sk)->ep->auth_chunk_list;
 
+	if (!ch)
+		goto num;
+
 	num_chunks = ntohs(ch->param_hdr.length) - sizeof(sctp_paramhdr_t);
-	if (len < num_chunks)
+	if (len < sizeof(struct sctp_authchunks) + num_chunks)
 		return -EINVAL;
 
-	len = num_chunks;
+	if (copy_to_user(to, ch->chunks, num_chunks))
+		return -EFAULT;
+num:
+	len = sizeof(struct sctp_authchunks) + num_chunks;
 	if (put_user(len, optlen))
 		return -EFAULT;
 	if (put_user(num_chunks, &p->gauth_number_of_chunks))
 		return -EFAULT;
-	if (copy_to_user(to, ch->chunks, len))
-		return -EFAULT;
 
 	return 0;
 }