Check return result in recvmsg
Check return result in recvmsg

PiperOrigin-RevId: 333411798
Change-Id: I61986b5a1bffd79c0e1950013aa9de09cf4a5d61

google/asylo,google/asylo,google/asylo,google/asylo,google/asylo,google/asylo