linux-kernel - [PATCH 4.14 09/31] net: __pskb_pull_tail() & pskb_carve_frag_list() drop

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Date:   Mon, 28 Feb 2022 18:24:05 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 4.14 09/31] net: __pskb_pull_tail() & pskb_carve_frag_list() drop_monitor friends

From: Eric Dumazet <edumazet@...gle.com>

commit ef527f968ae05c6717c39f49c8709a7e2c19183a upstream.

Whenever one of these functions pull all data from an skb in a frag_list,
use consume_skb() instead of kfree_skb() to avoid polluting drop
monitoring.

Fixes: 6fa01ccd8830 ("skbuff: Add pskb_extract() helper function")
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Link: https://lore.kernel.org/r/20220220154052.1308469-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/core/skbuff.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1974,7 +1974,7 @@ void *__pskb_pull_tail(struct sk_buff *s
 		/* Free pulled out fragments. */
 		while ((list = skb_shinfo(skb)->frag_list) != insp) {
 			skb_shinfo(skb)->frag_list = list->next;
-			kfree_skb(list);
+			consume_skb(list);
 		}
 		/* And insert new clone at head. */
 		if (clone) {
@@ -5408,7 +5408,7 @@ static int pskb_carve_frag_list(struct s
 	/* Free pulled out fragments. */
 	while ((list = shinfo->frag_list) != insp) {
 		shinfo->frag_list = list->next;
-		kfree_skb(list);
+		consume_skb(list);
 	}
 	/* And insert new clone at head. */
 	if (clone) {