Messages in this thread Patch in this message | | | From | Kuniyuki Iwashima <> | Subject | [PATCH v2 net 07/12] tcp: Fix a data-race around sysctl_tcp_max_orphans. | Date | Wed, 6 Jul 2022 16:39:58 -0700 |
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While reading sysctl_tcp_max_orphans, it can be changed concurrently. So, we need to add READ_ONCE() to avoid a data-race.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> --- net/ipv4/tcp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 028513d3e2a2..2222dfdde316 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2715,7 +2715,8 @@ static void tcp_orphan_update(struct timer_list *unused) static bool tcp_too_many_orphans(int shift) { - return READ_ONCE(tcp_orphan_cache) << shift > sysctl_tcp_max_orphans; + return READ_ONCE(tcp_orphan_cache) << shift > + READ_ONCE(sysctl_tcp_max_orphans); } bool tcp_check_oom(struct sock *sk, int shift) -- 2.30.2
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