From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Thu, 07 Jul 2016 08:20:28 +0000
Subject: [patch -next] mlxsw: spectrum_router: fix a use after free
Message-Id: <20160707082027.GB16742@mwanda>
List-Id: <kernel-janitors.vger.kernel.org>
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To: Jiri Pirko <jiri@mellanox.com>
Cc: Ido Schimmel <idosch@mellanox.com>, netdev@vger.kernel.org, kernel-janitors@vger.kernel.org

mlxsw_sp_fib_entry_destroy() frees "fib_entry" but we dereference it on
the next line.

Fixes: 61c503f976b5 ('mlxsw: spectrum_router: Implement fib4 add/del switchdev obj ops')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index e084ea5..adb481a 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -1652,8 +1652,8 @@ static void mlxsw_sp_router_fib4_add_info_destroy(void const *data)
 	struct mlxsw_sp_fib_entry *fib_entry = info->fib_entry;
 	struct mlxsw_sp *mlxsw_sp = info->mlxsw_sp;
 
-	mlxsw_sp_fib_entry_destroy(fib_entry);
 	mlxsw_sp_vr_put(mlxsw_sp, fib_entry->vr);
+	mlxsw_sp_fib_entry_destroy(fib_entry);
 	kfree(info);
 }