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ip: Fix a data-race around sysctl_fwmark_reflect.
[ Upstream commit85d0b4dbd7
] While reading sysctl_fwmark_reflect, it can be changed concurrently. Thus, we need to add READ_ONCE() to its reader. Fixes:e110861f86
("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>
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@ -305,7 +305,7 @@ void ipfrag_init(void);
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void ip_static_sysctl_init(void);
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#define IP4_REPLY_MARK(net, mark) \
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((net)->ipv4.sysctl_fwmark_reflect ? (mark) : 0)
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(READ_ONCE((net)->ipv4.sysctl_fwmark_reflect) ? (mark) : 0)
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static inline bool ip_is_fragment(const struct iphdr *iph)
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{
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