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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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5
net/core/sock.c
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@@ -327,7 +327,10 @@ int __sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)
BUG_ON(!sock_flag(sk, SOCK_MEMALLOC));
noreclaim_flag = memalloc_noreclaim_save();
ret = sk->sk_backlog_rcv(sk, skb);
ret = INDIRECT_CALL_INET(sk->sk_backlog_rcv,
tcp_v6_do_rcv,
tcp_v4_do_rcv,
sk, skb);
memalloc_noreclaim_restore(noreclaim_flag);
return ret;