diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-08-23 20:46:52 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-31 18:15:20 +0300 |
| commit | 410c88314ce351c9c77ec68da1d37bd91ddd76a2 (patch) | |
| tree | 5db55247b076bee8845e430fd9dccc842e24ebd8 /net/core | |
| parent | 2c7dae6c45112ee7ead62155fed375cb2e7d7cf8 (diff) | |
| download | linux-410c88314ce351c9c77ec68da1d37bd91ddd76a2.tar.xz | |
net: Fix a data-race around sysctl_net_busy_read.
[ Upstream commit e59ef36f0795696ab229569c153936bfd068d21c ]
While reading sysctl_net_busy_read, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.
Fixes: 2d48d67fa8cd ("net: poll/select low latency socket support")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/sock.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index f01e71c98d5b..1bb6a003323b 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -3032,7 +3032,7 @@ void sock_init_data(struct socket *sock, struct sock *sk) #ifdef CONFIG_NET_RX_BUSY_POLL sk->sk_napi_id = 0; - sk->sk_ll_usec = sysctl_net_busy_read; + sk->sk_ll_usec = READ_ONCE(sysctl_net_busy_read); #endif sk->sk_max_pacing_rate = ~0UL; |