netdev - [PATCH] netfilter: nf_sockopt_find() should return ERESTARTSYS

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Message-ID: <1406155995.3363.19.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Thu, 24 Jul 2014 00:53:15 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Pablo Neira Ayuso <pablo@...filter.org>,
	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>, netfilter-devel@...r.kernel.org
Subject: [PATCH] netfilter: nf_sockopt_find() should return ERESTARTSYS

From: Eric Dumazet <edumazet@...gle.com>

getsockopt() or setsockopt() sometimes returns -EINTR instead of
-ENOPROTOOPT, causing headaches to application developers.

This is because unsupported commands might go through nf_sockopt_find()
and this function returns -EINTR instead of -ERESTARTSYS if
a signal is pending.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 net/netfilter/nf_sockopt.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nf_sockopt.c b/net/netfilter/nf_sockopt.c
index f042ae521557..37181447715b 100644
--- a/net/netfilter/nf_sockopt.c
+++ b/net/netfilter/nf_sockopt.c
@@ -66,7 +66,7 @@ static struct nf_sockopt_ops *nf_sockopt_find(struct sock *sk, u_int8_t pf,
 	struct nf_sockopt_ops *ops;
 
 	if (mutex_lock_interruptible(&nf_sockopt_mutex) != 0)
-		return ERR_PTR(-EINTR);
+		return ERR_PTR(-ERESTARTSYS);
 
 	list_for_each_entry(ops, &nf_sockopts, list) {
 		if (ops->pf == pf) {


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