From: Menglong Dong Date: Sun, 20 Feb 2022 07:06:30 +0000 (+0800) Subject: net: tcp: add skb drop reasons to tcp_v4_rcv() X-Git-Tag: microblaze-v5.19~142^2~292^2~7 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=255f9034d3050fb1d0691226712c6b7f1ca674cd;p=linux-2.6-microblaze.git net: tcp: add skb drop reasons to tcp_v4_rcv() Use kfree_skb_reason() for some path in tcp_v4_rcv() that missed before, including: SKB_DROP_REASON_SOCKET_FILTER SKB_DROP_REASON_XFRM_POLICY Reviewed-by: Mengen Sun Reviewed-by: Hao Peng Signed-off-by: Menglong Dong Reviewed-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller --- diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 6873f46fc8ba..a3beab01e9a7 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -2057,6 +2057,8 @@ process: iph = ip_hdr(skb); tcp_v4_fill_cb(skb, iph, th); nsk = tcp_check_req(sk, skb, req, false, &req_stolen); + } else { + drop_reason = SKB_DROP_REASON_SOCKET_FILTER; } if (!nsk) { reqsk_put(req); @@ -2092,8 +2094,10 @@ process: } } - if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) + if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) { + drop_reason = SKB_DROP_REASON_XFRM_POLICY; goto discard_and_relse; + } if (tcp_v4_inbound_md5_hash(sk, skb, dif, sdif)) goto discard_and_relse; @@ -2166,6 +2170,7 @@ discard_and_relse: do_time_wait: if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) { + drop_reason = SKB_DROP_REASON_XFRM_POLICY; inet_twsk_put(inet_twsk(sk)); goto discard_it; }