From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roland Dreier Subject: [PATCH 3.19 and earlier] fib_rules: Fix dump_rules() not to exit early Date: Mon, 5 Oct 2015 10:29:28 -0700 Message-ID: <1444066168-5566-1-git-send-email-roland@kernel.org> Cc: Roland Dreier To: netdev@vger.kernel.org, stable@vger.kernel.org Return-path: Sender: stable-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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 --- Hi, this is needed for all stable trees earlier than 4.0 that have picked up 41fc014332d9; so far looks like at least 3.10.y and 3.14.y have made such releases. 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 627e517077e4..84340a2605ed 100644 --- a/net/core/fib_rules.c +++ b/net/core/fib_rules.c @@ -606,7 +606,7 @@ 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++; -- 2.5.0