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authorVladimir Oltean <vladimir.oltean@nxp.com>2021-08-10 14:50:24 +0300
committerJakub Kicinski <kuba@kernel.org>2021-08-10 23:22:57 +0300
commitc35b57ceff906856dd85af2d6709dab18fbca81f (patch)
treea96656f74efb2533a6f11f38ed59b62693e141e9 /net/dsa
parent45a687879b31caae4032abd1c2402e289d2b8083 (diff)
downloadlinux-c35b57ceff906856dd85af2d6709dab18fbca81f.tar.xz
net: switchdev: zero-initialize struct switchdev_notifier_fdb_info emitted by drivers towards the bridge
The blamed commit added a new field to struct switchdev_notifier_fdb_info, but did not make sure that all call paths set it to something valid. For example, a switchdev driver may emit a SWITCHDEV_FDB_ADD_TO_BRIDGE notifier, and since the 'is_local' flag is not set, it contains junk from the stack, so the bridge might interpret those notifications as being for local FDB entries when that was not intended. To avoid that now and in the future, zero-initialize all switchdev_notifier_fdb_info structures created by drivers such that all newly added fields to not need to touch drivers again. Fixes: 2c4eca3ef716 ("net: bridge: switchdev: include local flag in FDB notifications") Reported-by: Ido Schimmel <idosch@idosch.org> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Tested-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Reviewed-by: Karsten Graul <kgraul@linux.ibm.com> Link: https://lore.kernel.org/r/20210810115024.1629983-1-vladimir.oltean@nxp.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/dsa')
-rw-r--r--net/dsa/slave.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 532085da8d8f..23be8e01026b 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -2291,8 +2291,8 @@ static int dsa_slave_netdevice_event(struct notifier_block *nb,
static void
dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
{
+ struct switchdev_notifier_fdb_info info = {};
struct dsa_switch *ds = switchdev_work->ds;
- struct switchdev_notifier_fdb_info info;
struct dsa_port *dp;
if (!dsa_is_user_port(ds, switchdev_work->port))