From: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Date: Wed, 11 Jun 2008 18:27:26 +0000 (+0900)
Subject: ipv6: Fail with appropriate error code when setting not-applicable sockopt.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1717699cd5130009b7cd6756e883d8582c1fe706;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

ipv6: Fail with appropriate error code when setting not-applicable sockopt.

IPV6_MULTICAST_HOPS, for example, is not valid for stream sockets.
Since they are virtually unavailable for stream sockets,
we should return ENOPROTOOPT instead of EINVAL.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
---

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 9a3697172d5e..c042ce19bd14 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -67,7 +67,7 @@ int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
 
 	/* RA packet may be delivered ONLY to IPPROTO_RAW socket */
 	if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
-		return -EINVAL;
+		return -ENOPROTOOPT;
 
 	new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
 
@@ -446,7 +446,7 @@ done:
 
 	case IPV6_MULTICAST_HOPS:
 		if (sk->sk_type == SOCK_STREAM)
-			goto e_inval;
+			break;
 		if (optlen < sizeof(int))
 			goto e_inval;
 		if (val > 255 || val < -1)
@@ -466,7 +466,7 @@ done:
 
 	case IPV6_MULTICAST_IF:
 		if (sk->sk_type == SOCK_STREAM)
-			goto e_inval;
+			break;
 		if (optlen < sizeof(int))
 			goto e_inval;
 
@@ -862,7 +862,7 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
 		if (sk->sk_protocol != IPPROTO_UDP &&
 		    sk->sk_protocol != IPPROTO_UDPLITE &&
 		    sk->sk_protocol != IPPROTO_TCP)
-			return -EINVAL;
+			return -ENOPROTOOPT;
 		if (sk->sk_state != TCP_ESTABLISHED)
 			return -ENOTCONN;
 		val = sk->sk_family;