Package: release.debian.org
Severity: normal
Tags: buster
User: release.debian@packages.debian.org
Usertags: pu
Corosync upstream called my attention to an issue worth a stable update.
A potentially serious problem with a simple fix, which I backported to
the buster package:
$ debdiff corosync_3.0.1-2.dsc corosync_3.0.1-2+deb10u1.dsc
diff -Nru corosync-3.0.1/debian/changelog corosync-3.0.1/debian/changelog
--- corosync-3.0.1/debian/changelog 2019-02-04 00:31:24.0 +0100
+++ corosync-3.0.1/debian/changelog 2020-02-02 12:32:26.0 +0100
@@ -1,3 +1,11 @@
+corosync (3.0.1-2+deb10u1) buster; urgency=medium
+
+ * [f826af9] This branch is for buster updates
+ * [bfbfd3e] New patch: totemsrp: Reduce MTU to left room second mcast.
+Thanks to Jan Friesse (Closes: #950476)
+
+ -- Ferenc Wágner Sun, 02 Feb 2020 12:32:26 +0100
+
corosync (3.0.1-2) unstable; urgency=medium
* [70f53cb] Switch to Debhelper level 12.
diff -Nru corosync-3.0.1/debian/gbp.conf corosync-3.0.1/debian/gbp.conf
--- corosync-3.0.1/debian/gbp.conf 2019-02-03 11:42:36.0 +0100
+++ corosync-3.0.1/debian/gbp.conf 2020-02-01 08:45:41.0 +0100
@@ -1,5 +1,5 @@
[DEFAULT]
-debian-branch = debian/master
+debian-branch = debian/buster
upstream-branch = upstream/latest
[import-orig]
diff -Nru corosync-3.0.1/debian/patches/series
corosync-3.0.1/debian/patches/series
--- corosync-3.0.1/debian/patches/series2019-02-03 11:42:36.0
+0100
+++ corosync-3.0.1/debian/patches/series2020-02-02 12:31:51.0
+0100
@@ -6,3 +6,4 @@
AC_PROG_SED-is-already-present.patch
Use-the-SED-variable-provided-by-configure.patch
Use-the-AWK-variable-provided-by-configure.patch
+totemsrp-Reduce-MTU-to-left-room-second-mcast.patch
diff -Nru
corosync-3.0.1/debian/patches/totemsrp-Reduce-MTU-to-left-room-second-mcast.patch
corosync-3.0.1/debian/patches/totemsrp-Reduce-MTU-to-left-room-second-mcast.patch
---
corosync-3.0.1/debian/patches/totemsrp-Reduce-MTU-to-left-room-second-mcast.patch
1970-01-01 01:00:00.0 +0100
+++
corosync-3.0.1/debian/patches/totemsrp-Reduce-MTU-to-left-room-second-mcast.patch
2020-02-02 12:31:51.0 +0100
@@ -0,0 +1,43 @@
+From: Jan Friesse
+Date: Mon, 7 Oct 2019 15:26:22 +0200
+Subject: totemsrp: Reduce MTU to left room second mcast
+
+Messages sent during recovery phase are encapsulated so such message has
+extra size of mcast structure. This is not so big problem for UDPU,
+because most of the switches are able to fragment and defragment packet
+but it is problem for knet, because totempg is using maximum packet size
+(65536 bytes) and when another header is added during retransmition,
+then packet is too large.
+
+Solution is to reduce mtu by 2 * sizeof (struct mcast).
+
+Signed-off-by: Jan Friesse
+Reviewed-by: Fabio M. Di Nitto
+
+Closes: #950476
+---
+ exec/totemsrp.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/exec/totemsrp.c b/exec/totemsrp.c
+index ab27924..d846a0f 100644
+--- a/exec/totemsrp.c
b/exec/totemsrp.c
+@@ -805,7 +805,7 @@ static void totempg_mtu_changed(void *context, int net_mtu)
+ {
+ struct totemsrp_instance *instance = context;
+
+- instance->totem_config->net_mtu = net_mtu - sizeof (struct mcast);
++ instance->totem_config->net_mtu = net_mtu - 2 * sizeof (struct mcast);
+
+ log_printf (instance->totemsrp_log_level_debug,
+ "Net MTU changed to %d, new value is %d",
+@@ -5093,7 +5093,7 @@ void main_iface_change_fn (
+ }
+
+ void totemsrp_net_mtu_adjust (struct totem_config *totem_config) {
+- totem_config->net_mtu -= sizeof (struct mcast);
++ totem_config->net_mtu -= 2 * sizeof (struct mcast);
+ }
+
+ void totemsrp_service_ready_register (
I'm ready to upload if you agree.
--
Thanks,
Feri.
