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authorIdo Schimmel <idosch@mellanox.com>2017-07-12 09:12:55 +0200
committerDavid S. Miller <davem@davemloft.net>2017-07-12 08:15:52 -0700
commit6f497930af73863b32e8c73947a52d1003af31e2 (patch)
treeac244ff50fadeadd355f6bd436f45b37f2c5c24e /drivers
parenta9265b804dfdfca4e2ce3730fe0528da9c01dbf7 (diff)
mlxsw: spectrum_switchdev: Check status of memory allocation
We can't rely on kzalloc() always succeeding, so check its return value. Suppresses the following smatch error: mlxsw_sp_switchdev_event() error: potential null dereference 'switchdev_work->fdb_info.addr'. (kzalloc returns null) Fixes: af061378924f ("mlxsw: spectrum_switchdev: Add support for learning FDB through notification") Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
index 4733fe918315..656b2d3f1bee 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
@@ -1916,6 +1916,8 @@ static int mlxsw_sp_switchdev_event(struct notifier_block *unused,
memcpy(&switchdev_work->fdb_info, ptr,
sizeof(switchdev_work->fdb_info));
switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
+ if (!switchdev_work->fdb_info.addr)
+ goto err_addr_alloc;
ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
fdb_info->addr);
/* Take a reference on the device. This can be either
@@ -1932,6 +1934,10 @@ static int mlxsw_sp_switchdev_event(struct notifier_block *unused,
mlxsw_core_schedule_work(&switchdev_work->work);
return NOTIFY_DONE;
+
+err_addr_alloc:
+ kfree(switchdev_work);
+ return NOTIFY_BAD;
}
static struct notifier_block mlxsw_sp_switchdev_notifier = {