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(parent: 4f06f60) | patch
tcp: Fix a data-race around sysctl_tcp_challenge_ack_limit.
authorKuniyuki Iwashima <kuniyu@amazon.com>
Wed, 20 Jul 2022 16:50:21 +0000 (09:50 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 3 Aug 2022 10:03:46 +0000 (12:03 +0200)
commit6a22e7922d1a326167bb5b6c160b15eb1a8a7e9f
tree0241fd11a49603d51335b853d452b86883bf891ctree | snapshot
parent4f06f60cd4e33d1a78c1124d573c1b8b3c4fa02ecommit | diff
tcp: Fix a data-race around sysctl_tcp_challenge_ack_limit.

commit a30eb41d36f05b4a53c9626157865b6f986fc89f upstream.

While reading sysctl_tcp_challenge_ack_limit, it can be changed
concurrently.  Thus, we need to add READ_ONCE() to its reader.

Fixes: dbe400804f0b ("tcp: implement RFC 5961 3.2")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/ipv4/tcp_input.c diff | blob | history
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