[syzbot] [afs?] [net?] KCSAN: data-race in rxrpc_peer_keepalive_worker / rxrpc_send_data_packet

[David Howells]

Eric Dumazet <edumazet at google.com> wrote:

> LGTM, but potential load and store tearing should be avoided, using
> READ_ONCE() and WRITE_ONCE().

Fair point.

> last_tx_at being time64_t, this would still be racy on 32bit arches.
> 
> last_tx_at could probably be an "unsigned long" (in jiffies units)...

I've tried avoiding jiffies where possible.  We have way too many different
clocks with different granularities and uses in the kernel, but you might be
right.

David