[SPARC64]: Fix cmsg length checks in Solaris emulation layer.

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

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/sparc64/solaris/socket.c b/arch/sparc64/solaris/socket.c
index ec8e074c4eac..06740582717e 100644
--- a/arch/sparc64/solaris/socket.c
+++ b/arch/sparc64/solaris/socket.c
@@ -317,8 +317,10 @@ asmlinkage int solaris_sendmsg(int fd, struct sol_nmsghdr __user *user_msg, unsi
                 unsigned long *kcmsg;
                 compat_size_t cmlen;
 
-                if(kern_msg.msg_controllen > sizeof(ctl) &&
-                   kern_msg.msg_controllen <= 256) {
+                if (kern_msg.msg_controllen <= sizeof(compat_size_t))
+                        return -EINVAL;
+
+                if(kern_msg.msg_controllen > sizeof(ctl)) {
                         err = -ENOBUFS;
                         ctl_buf = kmalloc(kern_msg.msg_controllen, GFP_KERNEL);
                         if(!ctl_buf)