nexthop: Fix data-races around nexthop_compat_mode.
authorKuniyuki Iwashima <kuniyu@amazon.com>
Tue, 12 Jul 2022 00:15:33 +0000 (17:15 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 21 Jul 2022 19:24:28 +0000 (21:24 +0200)
commit0d17723afea3ae8c9f245c9bbd2ba5945b77e812
treecd9b6827ee62dbf0c53ea5d85e656d829461bd2b
parent6b26fb2fe227317f6afdc8ffbdbe7819aecce643
nexthop: Fix data-races around nexthop_compat_mode.

[ Upstream commit bdf00bf24bef9be1ca641a6390fd5487873e0d2e ]

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

Fixes: 4f80116d3df3 ("net: ipv4: add sysctl for nexthop api compatibility mode")
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/fib_semantics.c
net/ipv4/nexthop.c
net/ipv6/route.c