From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Roland Dreier , Luis Henriques Subject: [PATCH 3.16.y-ckt 063/104] fib_rules: Fix dump_rules() not to exit early Date: Mon, 26 Oct 2015 13:42:45 +0000 Message-Id: <1445867006-18048-64-git-send-email-luis.henriques@canonical.com> In-Reply-To: <1445867006-18048-1-git-send-email-luis.henriques@canonical.com> References: <1445867006-18048-1-git-send-email-luis.henriques@canonical.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.16.7-ckt19 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Roland Dreier Backports of 41fc014332d9 ("fib_rules: fix fib rule dumps across multiple skbs") introduced a regression in "ip rule show" - it ends up dumping the first rule over and over and never exiting, because 3.19 and earlier are missing commit 053c095a82cf ("netlink: make nlmsg_end() and genlmsg_end() void"), so fib_nl_fill_rule() ends up returning skb->len (i.e. > 0) in the success case. Fix this by checking the return code for < 0 instead of != 0. Signed-off-by: Roland Dreier Signed-off-by: Luis Henriques --- net/core/fib_rules.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c index aeedc3a961a1..99ae718b79be 100644 --- a/net/core/fib_rules.c +++ b/net/core/fib_rules.c @@ -631,7 +631,7 @@ static int dump_rules(struct sk_buff *skb, struct netlink_callback *cb, err = fib_nl_fill_rule(skb, rule, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, RTM_NEWRULE, NLM_F_MULTI, ops); - if (err) + if (err < 0) break; skip: idx++;