[NET]: Fix setsockopt locking bug

On Sparc, SO_DONTLINGER support resulted in sock_reset_flag being 
called without lock_sock().

Signed-off-by: Kyle Moffett <mrmacman_g4@mac.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 6 deletions

diff --git a/net/core/sock.c b/net/core/sock.c
index 8b35ccdc2b3b..12f6d9a2a522 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -206,13 +206,14 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
          */
 
 #ifdef SO_DONTLINGER            /* Compatibility item... */
-        switch (optname) {
-                case SO_DONTLINGER:
-                        sock_reset_flag(sk, SOCK_LINGER);
-                        return 0;
+        if (optname == SO_DONTLINGER) {
+                lock_sock(sk);
+                sock_reset_flag(sk, SOCK_LINGER);
+                release_sock(sk);
+                return 0;
         }
-#endif  
-                
+#endif
+        
         if(optlen<sizeof(int))
                 return(-EINVAL);