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Commit 37f7f421 authored by David S. Miller's avatar David S. Miller
Browse files

[NET]: Do not leak MSG_CMSG_COMPAT into userspace. 



Noticed by Sridhar Samudrala.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 065d9cac

net/socket.c

+2 −1
Original line number Diff line number Diff line
@@ -1862,7 +1862,8 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, unsigned int flag 
		if (err < 0)

			goto out_freeiov;

	}

	err = __put_user(msg_sys.msg_flags, COMPAT_FLAGS(msg));

	err = __put_user((msg_sys.msg_flags & ~MSG_CMSG_COMPAT),

			 COMPAT_FLAGS(msg));

	if (err)

		goto out_freeiov;

	if (MSG_CMSG_COMPAT & flags)