Patch "net/mlx5: Fix create autogroup prev initializer" has been added to the 4.9-stable tree

Patch "net/mlx5: Fix create autogroup prev initializer" has been added to the 4.9-stable tree

[gregkh]

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

    net/mlx5: Fix create autogroup prev initializer

to the 4.9-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-fix-create-autogroup-prev-initializer.patch
and it can be found in the queue-4.9 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 Mon Dec 18 14:12:34 CET 2017
From: Paul Blakey <paulb@mellanox.com>
Date: Fri, 10 Mar 2017 14:33:01 +0200
Subject: net/mlx5: Fix create autogroup prev initializer

From: Paul Blakey <paulb@mellanox.com>


[ Upstream commit af36370569eb37420e1e78a2e60c277b781fcd00 ]

The autogroups list is a list of non overlapping group boundaries
sorted by their start index. If the autogroups list wasn't empty
and an empty group slot was found at the start of the list,
the new group was added to the end of the list instead of the
beginning, as the prev initializer was incorrect.
When this was repeated, it caused multiple groups to have
overlapping boundaries.

Fixed that by correctly initializing the prev pointer to the
start of the list.

Fixes: eccec8da3b4e ('net/mlx5: Keep autogroups list ordered')
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/fs_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -1015,7 +1015,7 @@ static struct mlx5_flow_group *create_au
 						u32 *match_criteria)
 {
 	int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
-	struct list_head *prev = ft->node.children.prev;
+	struct list_head *prev = &ft->node.children;
 	unsigned int candidate_index = 0;
 	struct mlx5_flow_group *fg;
 	void *match_criteria_addr;


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

queue-4.9/net-mlx5-fix-create-autogroup-prev-initializer.patch