Description
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 rxrpc_peer_keepalive_worker / rxrpc_send_data_packet which is reporting an issue with the reads and writes to ->last_tx_at in: conn->peer->last_tx_at = ktime_get_seconds(); and: keepalive_at = peer->last_tx_at + RXRPC_KEEPALIVE_TIME; 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 ->last_tx_at is a 64-bit value, tearing can occur on a 32-bit arch. Fix both of these by switching to an unsigned int for ->last_tx_at and only storing the LSW of the time64_t. It can then be reconstructed at need provided no more than 68 years has elapsed since the last transmission.
Product status
ace45bec6d77bc061c3c3d8ad99e298ea9800c2b (git) before c08cf314191cd0f8699089715efb9eff030f0086
ace45bec6d77bc061c3c3d8ad99e298ea9800c2b (git) before f8cf1368e0a5491b27189a695c36f64e48f3d19d
ace45bec6d77bc061c3c3d8ad99e298ea9800c2b (git) before 5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b
4.17
Any version before 4.17
6.12.69 (semver)
6.18.8 (semver)
6.19 (original_commit_for_fix)
References
git.kernel.org/...c/c08cf314191cd0f8699089715efb9eff030f0086
git.kernel.org/...c/f8cf1368e0a5491b27189a695c36f64e48f3d19d
git.kernel.org/...c/5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b