From: David S. Miller <davem@davemloft.net>
Date: Mon, 24 Nov 2008 01:34:03 +0000 (-0800)
Subject: net: Make sure BHs are disabled in sock_prot_inuse_add()
X-Git-Tag: firefly_0821_release~16481^2~528
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6f756a8c36bf54d0afb1d457082b3e3033d951a7;p=firefly-linux-kernel-4.4.55.git

net: Make sure BHs are disabled in sock_prot_inuse_add()

The rule of calling sock_prot_inuse_add() is that BHs must
be disabled.  Some new calls were added where this was not
true and this tiggers warnings as reported by Ilpo.

Fix this by adding explicit BH disabling around those call sites.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index a2071dcfe9e8..c7d76579bf3c 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -452,7 +452,10 @@ static int netlink_create(struct net *net, struct socket *sock, int protocol)
 	if (err < 0)
 		goto out_module;
 
+	local_bh_disable();
 	sock_prot_inuse_add(net, &netlink_proto, 1);
+	local_bh_enable();
+
 	nlk = nlk_sk(sock->sk);
 	nlk->module = module;
 out:
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 0c70eff0b757..f03af84edf63 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3614,7 +3614,11 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
 
 	SCTP_DBG_OBJCNT_INC(sock);
 	atomic_inc(&sctp_sockets_allocated);
+
+	local_bh_disable();
 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
+	local_bh_enable();
+
 	return 0;
 }
 
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index e1ca8f744ca5..a45a9f7369ed 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -361,7 +361,9 @@ static void unix_sock_destructor(struct sock *sk)
 		unix_release_addr(u->addr);
 
 	atomic_dec(&unix_nr_socks);
+	local_bh_disable();
 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
+	local_bh_enable();
 #ifdef UNIX_REFCNT_DEBUG
 	printk(KERN_DEBUG "UNIX %p is destroyed, %d are still alive.\n", sk,
 		atomic_read(&unix_nr_socks));