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| author |   Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-13 13:51:57 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2022-07-15 11:49:55 +0100 |
| commit | 85d0b4dbd74b95cc492b1f4e34497d3f894f5d9a (patch) | |
| tree | 473cbabb0ef1250f586ab45b70f0993ff607e9c1 /include/net/ip.h | |
| parent | ip: Fix a data-race around sysctl_ip_autobind_reuse. (diff) | |
| download | linux-dev-85d0b4dbd74b95cc492b1f4e34497d3f894f5d9a.tar.xz linux-dev-85d0b4dbd74b95cc492b1f4e34497d3f894f5d9a.zip | |
ip: Fix a data-race around sysctl_fwmark_reflect.
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>
Diffstat (limited to '')
| -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 05fe313f72fa..4a15b6bcb4b8 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -384,7 +384,7 @@ 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) { |