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tcp: add RETPOLINE mitigation to sk_backlog_rcv

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Use INDIRECT_CALL_INET() to avoid an indirect call
when/if CONFIG_RETPOLINE=y

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2021-11-15 11:02:41 -08:00
committed by David S. Miller
parent 93afcfd1db
commit d2489c7b6d
3 changed files with 14 additions and 4 deletions
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8
include/net/sock.h
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@@ -1018,12 +1018,18 @@ static inline __must_check int sk_add_backlog(struct sock *sk, struct sk_buff *s
int __sk_backlog_rcv(struct sock *sk, struct sk_buff *skb);
INDIRECT_CALLABLE_DECLARE(int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb));
INDIRECT_CALLABLE_DECLARE(int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb));
static inline int sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)
{
if (sk_memalloc_socks() && skb_pfmemalloc(skb))
return __sk_backlog_rcv(sk, skb);
return sk->sk_backlog_rcv(sk, skb);
return INDIRECT_CALL_INET(sk->sk_backlog_rcv,
tcp_v6_do_rcv,
tcp_v4_do_rcv,
sk, skb);
}
static inline void sk_incoming_cpu_update(struct sock *sk)