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| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-11 17:15:33 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-21 21:24:28 +0200 |
| commit | 0d17723afea3ae8c9f245c9bbd2ba5945b77e812 (patch) | |
| tree | cd9b6827ee62dbf0c53ea5d85e656d829461bd2b /net/ipv6 | |
| parent | 6b26fb2fe227317f6afdc8ffbdbe7819aecce643 (diff) | |
| download | linux-stable-0d17723afea3ae8c9f245c9bbd2ba5945b77e812.tar.gz linux-stable-0d17723afea3ae8c9f245c9bbd2ba5945b77e812.tar.bz2 linux-stable-0d17723afea3ae8c9f245c9bbd2ba5945b77e812.zip | |
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>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/route.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 4ca754c360a3..27274fc3619a 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -5756,7 +5756,7 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb, if (nexthop_is_blackhole(rt->nh)) rtm->rtm_type = RTN_BLACKHOLE; - if (net->ipv4.sysctl_nexthop_compat_mode && + if (READ_ONCE(net->ipv4.sysctl_nexthop_compat_mode) && rt6_fill_node_nexthop(skb, rt->nh, &nh_flags) < 0) goto nla_put_failure; |