In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix data-race warning and potential load/store tearing Fix the following: BUG: KCSAN: data-race in rxrpcpeerkeepaliveworker / rxrpcsenddatapacket which is reporting an issue with the reads and writes to ->lasttxat in: conn->peer->lasttxat = ktimegetseconds(); and: keepaliveat = peer->lasttxat + RXRPCKEEPALIVETIME; The lockless accesses to these to values aren't actually a problem as the read only needs an approximate time of last transmission for the purposes of deciding whether or not the transmission of a keepalive packet is warranted yet. Also, as ->lasttxat is a 64-bit value, tearing can occur on a 32-bit arch. Fix both of these by switching to an unsigned int for ->lasttxat and only storing the LSW of the time64t. It can then be reconstructed at need provided no more than 68 years has elapsed since the last transmission.