net/mlx4_en: Fix mixed PFC and Global pause user control requests

[pandora-kernel.git] / net / compat.c

diff --git a/net/compat.c b/net/compat.c
index 3139ef2..f06994d 100644 (file)
--- a/net/compat.c
+++ b/net/compat.c
@@ -71,8 +71,15 @@ int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
            __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
            __get_user(kmsg->msg_flags, &umsg->msg_flags))
                return -EFAULT;
-       if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
+
+       if (!tmp1)
+               kmsg->msg_namelen = 0;
+
+       if (kmsg->msg_namelen < 0)
                return -EINVAL;
+
+       if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
+               kmsg->msg_namelen = sizeof(struct sockaddr_storage);
        kmsg->msg_name = compat_ptr(tmp1);
        kmsg->msg_iov = compat_ptr(tmp2);
        kmsg->msg_control = compat_ptr(tmp3);
@@ -85,7 +92,7 @@ int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
 {
        int tot_len;
 
-       if (kern_msg->msg_namelen) {
+       if (kern_msg->msg_name && kern_msg->msg_namelen) {
                if (mode == VERIFY_READ) {
                        int err = move_addr_to_kernel(kern_msg->msg_name,
                                                      kern_msg->msg_namelen,
@@ -94,8 +101,10 @@ int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
                                return err;
                }
                kern_msg->msg_name = kern_address;
-       } else
+       } else {
                kern_msg->msg_name = NULL;
+               kern_msg->msg_namelen = 0;
+       }
 
        tot_len = iov_from_user_compat_to_kern(kern_iov,
                                          (struct compat_iovec __user *)kern_msg->msg_iov,
@@ -735,24 +744,18 @@ static unsigned char nas[21] = {
 
 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
 {
-       if (flags & MSG_CMSG_COMPAT)
-               return -EINVAL;
        return __sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
 }
 
 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
                                    unsigned vlen, unsigned int flags)
 {
-       if (flags & MSG_CMSG_COMPAT)
-               return -EINVAL;
        return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
                              flags | MSG_CMSG_COMPAT);
 }
 
 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
 {
-       if (flags & MSG_CMSG_COMPAT)
-               return -EINVAL;
        return __sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
 }
 
@@ -775,9 +778,6 @@ asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
        int datagrams;
        struct timespec ktspec;
 
-       if (flags & MSG_CMSG_COMPAT)
-               return -EINVAL;
-
        if (timeout == NULL)
                return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
                                      flags | MSG_CMSG_COMPAT, NULL);