net: fix uninitialized variable issue

msg_iocb needs to be initialized on the recv/recvfrom path. Otherwise afalg will wrongly interpret it as an async call. Cc: [email protected] Reported-by: Harald Freudenberger <[email protected]> Signed-off-by: Tadeusz Struk <[email protected]> Signed-off-by: David S. Miller <[email protected]>
mrcsosa · Dec 15, 2015 · 130ed5d · 130ed5d
1 parent 5233252
commit 130ed5d
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/net/socket.c b/net/socket.c
@@ -1695,6 +1695,7 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
 	msg.msg_name = addr ? (struct sockaddr *)&address : NULL;
 	/* We assume all kernel code knows the size of sockaddr_storage */
 	msg.msg_namelen = 0;
+	msg.msg_iocb = NULL;
 	if (sock->file->f_flags & O_NONBLOCK)
 		flags |= MSG_DONTWAIT;
 	err = sock_recvmsg(sock, &msg, iov_iter_count(&msg.msg_iter), flags);