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| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-08-23 10:46:52 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-05 10:26:31 +0200 |
| commit | d908fd060927cf23bae5b2975140c7ed81bd4013 (patch) | |
| tree | 4c2a87c334917000bf9aab0738f86e1f8e792104 | |
| parent | da89cab514b3ec7fdedb378617160c47fe3b60a9 (diff) | |
| download | linux-d908fd060927cf23bae5b2975140c7ed81bd4013.tar.gz linux-d908fd060927cf23bae5b2975140c7ed81bd4013.tar.bz2 linux-d908fd060927cf23bae5b2975140c7ed81bd4013.zip | |
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>
| -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 79f085df52ce..cd23a8e4556c 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -2856,7 +2856,7 @@ 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 = ~0U; |