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Commit 86c8f9d1 authored by Herbert Xu's avatar Herbert Xu Committed by David S. Miller
Browse files

[IPV4] Fix EPROTONOSUPPORT error in inet_create 



There is a coding error in inet_create that causes it to always return
ESOCKTNOSUPPORT.  It should return EPROTONOSUPPORT when there are
protocols registered for a given socket type but none of them match
the requested protocol.

This is based on a patch by Jayachandran C.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 24c69275

net/ipv4/af_inet.c

+3 −4
Original line number Diff line number Diff line
@@ -228,13 +228,14 @@ static int inet_create(struct socket *sock, int protocol) 
	unsigned char answer_flags;

	char answer_no_check;

	int try_loading_module = 0;

	int err = -ESOCKTNOSUPPORT;

	int err;



	sock->state = SS_UNCONNECTED;



	/* Look for the requested type/protocol pair. */

	answer = NULL;

lookup_protocol:

	err = -ESOCKTNOSUPPORT;

	rcu_read_lock();

	list_for_each_rcu(p, &inetsw[sock->type]) {

		answer = list_entry(p, struct inet_protosw, list);
@@ -252,6 +253,7 @@ lookup_protocol: 
			if (IPPROTO_IP == answer->protocol)

				break;

		}

		err = -EPROTONOSUPPORT;

		answer = NULL;

	}
@@ -280,9 +282,6 @@ lookup_protocol: 
	err = -EPERM;

	if (answer->capability > 0 && !capable(answer->capability))

		goto out_rcu_unlock;

	err = -EPROTONOSUPPORT;

	if (!protocol)

		goto out_rcu_unlock;



	sock->ops = answer->ops;

	answer_prot = answer->prot;