diff options
Diffstat (limited to 'target/linux')
2 files changed, 143 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/781-v5.18-1-net-dsa-Move-VLAN-filtering-syncing-out-of-dsa_switc.patch b/target/linux/generic/backport-5.4/781-v5.18-1-net-dsa-Move-VLAN-filtering-syncing-out-of-dsa_switc.patch new file mode 100644 index 0000000000..e710ed591b --- /dev/null +++ b/target/linux/generic/backport-5.4/781-v5.18-1-net-dsa-Move-VLAN-filtering-syncing-out-of-dsa_switc.patch @@ -0,0 +1,80 @@ +From dee0f71c39afdaa30af7b94af420ca1d5c0f0349 Mon Sep 17 00:00:00 2001 +From: Tobias Waldekranz <tobias@waldekranz.com> +Date: Mon, 24 Jan 2022 22:09:43 +0100 +Subject: [PATCH 5.4 1/2] net: dsa: Move VLAN filtering syncing out of + dsa_switch_bridge_leave +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +commit 381a730182f1d174e1950cd4e63e885b1c302051 upstream. + +Most of dsa_switch_bridge_leave was, in fact, dealing with the syncing +of VLAN filtering for switches on which that is a global +setting. Separate the two phases to prepare for the cross-chip related +bugfix in the following commit. + +Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com> +Reviewed-by: Vladimir Oltean <olteanv@gmail.com> +Signed-off-by: David S. Miller <davem@davemloft.net> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + net/dsa/switch.c | 31 ++++++++++++++++++++++--------- + 1 file changed, 22 insertions(+), 9 deletions(-) + +diff --git a/net/dsa/switch.c b/net/dsa/switch.c +index 6a9607518823..dd71e3301b27 100644 +--- a/net/dsa/switch.c ++++ b/net/dsa/switch.c +@@ -65,19 +65,12 @@ static int dsa_switch_bridge_join(struct dsa_switch *ds, + return 0; + } + +-static int dsa_switch_bridge_leave(struct dsa_switch *ds, +- struct dsa_notifier_bridge_info *info) ++static int dsa_switch_sync_vlan_filtering(struct dsa_switch *ds, ++ struct dsa_notifier_bridge_info *info) + { + bool unset_vlan_filtering = br_vlan_enabled(info->br); + int err, i; + +- if (ds->index == info->sw_index && ds->ops->port_bridge_leave) +- ds->ops->port_bridge_leave(ds, info->port, info->br); +- +- if (ds->index != info->sw_index && ds->ops->crosschip_bridge_leave) +- ds->ops->crosschip_bridge_leave(ds, info->sw_index, info->port, +- info->br); +- + /* If the bridge was vlan_filtering, the bridge core doesn't trigger an + * event for changing vlan_filtering setting upon slave ports leaving + * it. That is a good thing, because that lets us handle it and also +@@ -103,6 +96,26 @@ static int dsa_switch_bridge_leave(struct dsa_switch *ds, + if (err && err != EOPNOTSUPP) + return err; + } ++ ++ return 0; ++} ++ ++static int dsa_switch_bridge_leave(struct dsa_switch *ds, ++ struct dsa_notifier_bridge_info *info) ++{ ++ int err; ++ ++ if (ds->index == info->sw_index && ds->ops->port_bridge_leave) ++ ds->ops->port_bridge_leave(ds, info->port, info->br); ++ ++ if (ds->index != info->sw_index && ds->ops->crosschip_bridge_leave) ++ ds->ops->crosschip_bridge_leave(ds, info->sw_index, info->port, ++ info->br); ++ ++ err = dsa_switch_sync_vlan_filtering(ds, info); ++ if (err) ++ return err; ++ + return 0; + } + +-- +2.34.1 + diff --git a/target/linux/generic/backport-5.4/781-v5.18-2-net-dsa-Avoid-cross-chip-syncing-of-VLAN-filtering.patch b/target/linux/generic/backport-5.4/781-v5.18-2-net-dsa-Avoid-cross-chip-syncing-of-VLAN-filtering.patch new file mode 100644 index 0000000000..a5f37457c7 --- /dev/null +++ b/target/linux/generic/backport-5.4/781-v5.18-2-net-dsa-Avoid-cross-chip-syncing-of-VLAN-filtering.patch @@ -0,0 +1,63 @@ +From f6edb463510bd936f143907468fc0bf0762b87bf Mon Sep 17 00:00:00 2001 +From: Tobias Waldekranz <tobias@waldekranz.com> +Date: Mon, 24 Jan 2022 22:09:44 +0100 +Subject: [PATCH 5.4 2/2] net: dsa: Avoid cross-chip syncing of VLAN filtering +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +commit 108dc8741c203e9d6ce4e973367f1bac20c7192b upstream. + +Changes to VLAN filtering are not applicable to cross-chip +notifications. + +On a system like this: + +.-----. .-----. .-----. +| sw1 +---+ sw2 +---+ sw3 | +'-1-2-' '-1-2-' '-1-2-' + +Before this change, upon sw1p1 leaving a bridge, a call to +dsa_port_vlan_filtering would also be made to sw2p1 and sw3p1. + +In this scenario: + +.---------. .-----. .-----. +| sw1 +---+ sw2 +---+ sw3 | +'-1-2-3-4-' '-1-2-' '-1-2-' + +When sw1p4 would leave a bridge, dsa_port_vlan_filtering would be +called for sw2 and sw3 with a non-existing port - leading to array +out-of-bounds accesses and crashes on mv88e6xxx. + +Fixes: d371b7c92d19 ("net: dsa: Unset vlan_filtering when ports leave the bridge") +Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com> +Reviewed-by: Vladimir Oltean <olteanv@gmail.com> +Signed-off-by: David S. Miller <davem@davemloft.net> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + net/dsa/switch.c | 8 +++++--- + 1 file changed, 5 insertions(+), 3 deletions(-) + +diff --git a/net/dsa/switch.c b/net/dsa/switch.c +index dd71e3301b27..f517d6d7efa2 100644 +--- a/net/dsa/switch.c ++++ b/net/dsa/switch.c +@@ -112,9 +112,11 @@ static int dsa_switch_bridge_leave(struct dsa_switch *ds, + ds->ops->crosschip_bridge_leave(ds, info->sw_index, info->port, + info->br); + +- err = dsa_switch_sync_vlan_filtering(ds, info); +- if (err) +- return err; ++ if (ds->index == info->sw_index) { ++ err = dsa_switch_sync_vlan_filtering(ds, info); ++ if (err) ++ return err; ++ } + + return 0; + } +-- +2.34.1 + |