From: Chuck Lever <chuck.lever@oracle.com>
Date: Mon, 10 Dec 2007 19:57:45 +0000 (-0500)
Subject: NFS: Verify IPv6 addresses properly
X-Git-Tag: v2.6.25-rc1~1146^2~51
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=cdcd7f9abc8c95524376835fbe8e11c5f7bf588e;p=linux-2.6-omap-h63xx.git

NFS: Verify IPv6 addresses properly

Add support to nfs_verify_server_address for recognizing AF_INET6
addresses.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index c3d8fcf3852..038b20b38b2 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -600,16 +600,21 @@ static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
 }
 
 /*
- * Sanity-check a server address provided by the mount command
+ * Sanity-check a server address provided by the mount command.
+ *
+ * Address family must be initialized, and address must not be
+ * the ANY address for that family.
  */
 static int nfs_verify_server_address(struct sockaddr *addr)
 {
 	switch (addr->sa_family) {
 	case AF_INET: {
-		struct sockaddr_in *sa = (struct sockaddr_in *) addr;
-		if (sa->sin_addr.s_addr != INADDR_ANY)
-			return 1;
-		break;
+		struct sockaddr_in *sa = (struct sockaddr_in *)addr;
+		return sa->sin_addr.s_addr != INADDR_ANY;
+	}
+	case AF_INET6: {
+		struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr;
+		return !ipv6_addr_any(sa);
 	}
 	}