ratelimit: Fix data-races in ___ratelimit().
authorKuniyuki Iwashima <kuniyu@amazon.com>
Tue, 23 Aug 2022 17:46:48 +0000 (10:46 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 31 Aug 2022 15:16:43 +0000 (17:16 +0200)
commit0db9ce822f13634e8042405684870da75747005f
tree54ff57167f4051191d4e514b45668685df539139
parentcd755a7e40622e4f376ec8d652ba3b54d95cfa56
ratelimit: Fix data-races in ___ratelimit().

[ Upstream commit 6bae8ceb90ba76cdba39496db936164fa672b9be ]

While reading rs->interval and rs->burst, they can be changed
concurrently via sysctl (e.g. net_ratelimit_state).  Thus, we
need to add READ_ONCE() to their readers.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
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>
lib/ratelimit.c