From: Kuniyuki Iwashima kuniyu@amazon.com
[ 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 --- include/net/ip.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/net/ip.h b/include/net/ip.h index c762fd047ef4..f0e13a256582 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -283,7 +283,7 @@ 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) {