diff options
| author | Eric Dumazet <edumazet@google.com> | 2019-11-04 21:38:43 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-12 19:18:47 +0100 |
| commit | 47598ed4ad3cbf2102fe685e516dba1d61ad252d (patch) | |
| tree | c175b3d057ded51a2192ae4e5db486b02af69ae1 /include/net/sock.h | |
| parent | 852a503230d9acc386a4c7b4e4b5c252f62c90c9 (diff) | |
net: prevent load/store tearing on sk->sk_stamp
[ Upstream commit f75359f3ac855940c5718af10ba089b8977bf339 ]
Add a couple of READ_ONCE() and WRITE_ONCE() to prevent
load-tearing and store-tearing in sock_read_timestamp()
and sock_write_timestamp()
This might prevent another KCSAN report.
Fixes: 3a0ed3e96197 ("sock: Make sock->sk_stamp thread-safe")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Acked-by: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/net/sock.h')
| -rw-r--r-- | include/net/sock.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index 7ec4d0bd8d12..780c6c0a86f0 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -2229,7 +2229,7 @@ static inline ktime_t sock_read_timestamp(struct sock *sk) return kt; #else - return sk->sk_stamp; + return READ_ONCE(sk->sk_stamp); #endif } @@ -2240,7 +2240,7 @@ static inline void sock_write_timestamp(struct sock *sk, ktime_t kt) sk->sk_stamp = kt; write_sequnlock(&sk->sk_stamp_seq); #else - sk->sk_stamp = kt; + WRITE_ONCE(sk->sk_stamp, kt); #endif } |