Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933911AbbBQLha (ORCPT ); Tue, 17 Feb 2015 06:37:30 -0500 Received: from ip4-83-240-67-251.cust.nbox.cz ([83.240.67.251]:39790 "EHLO ip4-83-240-18-248.cust.nbox.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757039AbbBQLfV (ORCPT ); Tue, 17 Feb 2015 06:35:21 -0500 From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Herbert Xu , "David S. Miller" , Jiri Slaby Subject: [PATCH 3.12 082/122] udp_diag: Fix socket skipping within chain Date: Tue, 17 Feb 2015 12:34:29 +0100 Message-Id: X-Mailer: git-send-email 2.2.2 In-Reply-To: <09e6fe32192a77f6e2e60cc0f4103e630c7ecf20.1424099973.git.jslaby@suse.cz> References: <09e6fe32192a77f6e2e60cc0f4103e630c7ecf20.1424099973.git.jslaby@suse.cz> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1693 Lines: 51 From: Herbert Xu 3.12-stable review patch. If anyone has any objections, please let me know. =============== [ Upstream commit 86f3cddbc3037882414c7308973530167906b7e9 ] While working on rhashtable walking I noticed that the UDP diag dumping code is buggy. In particular, the socket skipping within a chain never happens, even though we record the number of sockets that should be skipped. As this code was supposedly copied from TCP, this patch does what TCP does and resets num before we walk a chain. Signed-off-by: Herbert Xu Acked-by: Pavel Emelyanov Signed-off-by: David S. Miller Signed-off-by: Jiri Slaby --- net/ipv4/udp_diag.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c index 7927db0a9279..4a000f1dd757 100644 --- a/net/ipv4/udp_diag.c +++ b/net/ipv4/udp_diag.c @@ -99,11 +99,13 @@ static void udp_dump(struct udp_table *table, struct sk_buff *skb, struct netlin s_slot = cb->args[0]; num = s_num = cb->args[1]; - for (slot = s_slot; slot <= table->mask; num = s_num = 0, slot++) { + for (slot = s_slot; slot <= table->mask; s_num = 0, slot++) { struct sock *sk; struct hlist_nulls_node *node; struct udp_hslot *hslot = &table->hash[slot]; + num = 0; + if (hlist_nulls_empty(&hslot->head)) continue; -- 2.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/