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tcp: Fix a data-race around sysctl_tcp_comp_sack_slack_ns.
While reading sysctl_tcp_comp_sack_slack_ns, it can be changed
concurrently. Thus, we need to add READ_ONCE() to its reader.
Fixes: a70437cc09
("tcp: add hrtimer slack to sack compression")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 1 additions and 1 deletions
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@ -5547,7 +5547,7 @@ static void __tcp_ack_snd_check(struct sock *sk, int ofo_possible)
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rtt * (NSEC_PER_USEC >> 3)/20);
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sock_hold(sk);
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hrtimer_start_range_ns(&tp->compressed_ack_timer, ns_to_ktime(delay),
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sock_net(sk)->ipv4.sysctl_tcp_comp_sack_slack_ns,
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READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_comp_sack_slack_ns),
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HRTIMER_MODE_REL_PINNED_SOFT);
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}
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