Patch "net/mlx5: E-Switch, Unload the representors in the correct order" has been added to the 4.12-stable tree

Patch "net/mlx5: E-Switch, Unload the representors in the correct order" has been added to the 4.12-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    net/mlx5: E-Switch, Unload the representors in the correct order

to the 4.12-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-mlx5-e-switch-unload-the-representors-in-the-correct-order.patch
and it can be found in the queue-4.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Sep 14 23:20:23 PDT 2017
From: Shahar Klein <shahark@mellanox.com>
Date: Tue, 1 Aug 2017 15:29:55 +0300
Subject: net/mlx5: E-Switch, Unload the representors in the correct order

From: Shahar Klein <shahark@mellanox.com>


[ Upstream commit 191220396db840822fc818edf03c49f0c02eb237 ]

When changing from switchdev to legacy mode, all the representor port
devices (uplink nic and reps) are cleaned up. Part of this cleaning
process is removing the neigh entries and the hash table containing them.
However, a representor neigh entry might be linked to the uplink port
hash table and if the uplink nic is cleaned first the cleaning of the
representor will end up in null deref.
Fix that by unloading the representors in the opposite order of load.

Fixes: cb67b832921c ("net/mlx5e: Introduce SRIOV VF representors")
Signed-off-by: Shahar Klein <shahark@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -818,7 +818,7 @@ void esw_offloads_cleanup(struct mlx5_es
 	struct mlx5_eswitch_rep *rep;
 	int vport;
 
-	for (vport = 0; vport < nvports; vport++) {
+	for (vport = nvports - 1; vport >= 0; vport--) {
 		rep = &esw->offloads.vport_reps[vport];
 		if (!rep->valid)
 			continue;


Patches currently in stable-queue which might be from shahark@mellanox.com are

queue-4.12/net-mlx5-e-switch-unload-the-representors-in-the-correct-order.patch