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(parent: 6f44667) | patch
tcp: Fix a data-race around sysctl_tcp_invalid_ratelimit.
authorKuniyuki Iwashima <kuniyu@amazon.com>
Wed, 20 Jul 2022 16:50:26 +0000 (09:50 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 3 Aug 2022 10:03:49 +0000 (12:03 +0200)
commitdac5644a823ef52d5abdeb3db88d49e98e4a0f29
tree4989ea36b18a438fa85cf661c4b631c363b82651tree | snapshot
parent6f446677ebb34665a631ad408155f6cf1bd02b09commit | diff
tcp: Fix a data-race around sysctl_tcp_invalid_ratelimit.

[ Upstream commit 2afdbe7b8de84c28e219073a6661080e1b3ded48 ]

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

Fixes: 032ee4236954 ("tcp: helpers to mitigate ACK loops by rate-limiting out-of-window dupacks")
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>
net/ipv4/tcp_input.c diff | blob | history
Domain: System / Kernel;