diff options
| author | Dan Carpenter <dan.carpenter@linaro.org> | 2025-09-30 15:25:01 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-10-03 10:20:20 -0700 |
| commit | 4f0d91ba72811fd5dd577bcdccd7fed649aae62c (patch) | |
| tree | e58e34d7dc53381aa58329bf633d36e81de509ab | |
| parent | 49bdb63ff64469a6de8ea901aef123c75be9bbe7 (diff) | |
net/mlx4: prevent potential use after free in mlx4_en_do_uc_filter()
Print "entry->mac" before freeing "entry". The "entry" pointer is
freed with kfree_rcu() so it's unlikely that we would trigger this
in real life, but it's safer to re-order it.
Fixes: cc5387f7346a ("net/mlx4_en: Add unicast MAC filtering")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/aNvMHX4g8RksFFvV@stanley.mountain
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index d2071aff7b8f..308b4458e0d4 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -1180,9 +1180,9 @@ static void mlx4_en_do_uc_filter(struct mlx4_en_priv *priv, mlx4_unregister_mac(mdev->dev, priv->port, mac); hlist_del_rcu(&entry->hlist); - kfree_rcu(entry, rcu); en_dbg(DRV, priv, "Removed MAC %pM on port:%d\n", entry->mac, priv->port); + kfree_rcu(entry, rcu); ++removed; } } |