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Fix RA flood (#1739797)

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Upstream commit introduced serious regression, taking a lot of cycles
and filling journal. Its benefits are not too high. Revert it until
proper fix is found.

http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=18547163b15bbbcb5ed5113360440387d89d0e15
This commit is contained in:
Petr Menšík 2019-08-28 19:33:58 +02:00
parent de32b088a8
commit 70d1413570
2 changed files with 38 additions and 1 deletions
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32
dnsmasq-2.80-rh1739797.patch Normal file
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@ -0,0 +1,32 @@
From 18547163b15bbbcb5ed5113360440387d89d0e15 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Men=C5=A1=C3=ADk?= <pemensik@redhat.com>
Date: Wed, 28 Aug 2019 19:28:02 +0200
Subject: [PATCH] Revert "Do unsolicited RAs for interfaces which appear after
dnsmasq startup."
This reverts commit 0a496f059c1e9d75c33cce4c1211d58422ba4f62.
---
src/dhcp6.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/src/dhcp6.c b/src/dhcp6.c
index 5badc46..454193e 100644
--- a/src/dhcp6.c
+++ b/src/dhcp6.c
@@ -679,13 +679,6 @@ static int construct_worker(struct in6_addr *local, int prefix,
is_same_net6(local, &template->start6, template->prefix) &&
is_same_net6(local, &template->end6, template->prefix))
{
- /* First time found, do fast RA. */
- if (template->if_index != if_index || !IN6_ARE_ADDR_EQUAL(&template->local6, local))
- {
- ra_start_unsolicited(param->now, template);
- param->newone = 1;
- }
-
template->if_index = if_index;
template->local6 = *local;
}
--
2.20.1

7
dnsmasq.spec
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@ -13,7 +13,7 @@
Name: dnsmasq
Version: 2.80
Release: 9%{?extraversion:.%{extraversion}}%{?dist}
Release: 10%{?extraversion:.%{extraversion}}%{?dist}
Summary: A lightweight DHCP/caching DNS server
License: GPLv2 or GPLv3
@ -33,6 +33,8 @@ Patch7: dnsmasq-2.80-rh1728701.patch
# https://bugzilla.redhat.com/show_bug.cgi?id=1735096
Patch8: dnsmasq-2.80-nettle.patch
Patch9: dnsmasq-2.80-SIOCGSTAMP.patch
# https://bugzilla.redhat.com/show_bug.cgi?id=1739797
Patch10: dnsmasq-2.80-rh1739797.patch
# This is workaround to nettle bug #1549190
# https://bugzilla.redhat.com/show_bug.cgi?id=1549190
@ -165,6 +167,9 @@ install -Dpm 644 %{SOURCE2} %{buildroot}%{_sysusersdir}/%{name}.conf
%{_mandir}/man1/dhcp_*
%changelog
* Wed Aug 28 2019 Petr Menšík <pemensik@redhat.com> - 2.80-10
- Fix CPU intensive RA flood (#1739797)
* Fri Aug 09 2019 Petr Menšík <pemensik@redhat.com> - 2.80-9
- Remove SO_TIMESTAMP support, DHCP was broken (#1739081)