CVE-2024-57791 net/smc: check return value of sock_recvmsg when draining clc data

In the Linux kernel, the following vulnerability has been resolved: net/smc: check return value of sockrecvmsg when draining clc data When receiving clc msg, the field length in smcclcmsghdr indicates the length of msg should be received from network and the value should not be fully trusted as i...