diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-13 13:51:57 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-29 17:25:13 +0200 |
| commit | dccf8a67f30e18980d13f07006e5a536bbd1e136 (patch) | |
| tree | 82d9944b0bdcea1d578f04044179709978f84a37 | |
| parent | 87ceaa199a72c5856d49a030941fabcd5c3928d4 (diff) | |
| download | linux-stable-dccf8a67f30e18980d13f07006e5a536bbd1e136.tar.gz linux-stable-dccf8a67f30e18980d13f07006e5a536bbd1e136.tar.bz2 linux-stable-dccf8a67f30e18980d13f07006e5a536bbd1e136.zip | |
ip: Fix a data-race around sysctl_fwmark_reflect.
[ Upstream commit 85d0b4dbd74b95cc492b1f4e34497d3f894f5d9a ]
While reading sysctl_fwmark_reflect, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.
Fixes: e110861f8609 ("net: add a sysctl to reflect the fwmark on replies")
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>
| -rw-r--r-- | include/net/ip.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/ip.h b/include/net/ip.h index c69dd114f367..a0ac57af82dc 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -379,7 +379,7 @@ void ipfrag_init(void); void ip_static_sysctl_init(void); #define IP4_REPLY_MARK(net, mark) \ - ((net)->ipv4.sysctl_fwmark_reflect ? (mark) : 0) + (READ_ONCE((net)->ipv4.sysctl_fwmark_reflect) ? (mark) : 0) static inline bool ip_is_fragment(const struct iphdr *iph) { |