[PATCH] net/mlx5: fix the Rx queue control management

[Raslan Darawsheh]

Hi,

From: Bing Zhao <bingz at nvidia.com>
Sent: Monday, November 4, 2024 6:15 PM
To: Dariusz Sosnowski; Slava Ovsiienko; dev at dpdk.org; Raslan Darawsheh
Cc: Ori Kam; Suanming Mou; Matan Azrad; stable at dpdk.org
Subject: [PATCH] net/mlx5: fix the Rx queue control management

With the shared Rx queue feature introduced, the control and private
Rx queue structures are decoupled, each control structure can be
shared for multiple queue for all representors inside a domain.

So it should be only managed by the shared context instead of any
private data of each device. The previous workaround is using a flag
to check the owner (allocator) of the structure and handle it only
on that device closing stage.

A proper formal solution is to add a reference count for each control
structure and only free the structure when there is no reference to
it to get rid of the UAF issue.

Fixes: f957ac996435 ("net/mlx5: workaround list management of Rx queue control")
Fixes: bcc220cb57d7 ("net/mlx5: fix shared Rx queue list management")
CC: stable at dpdk.org

Signed-off-by: Bing Zhao <bingz at nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>
Acked-by: Dariusz Sosnowski <dsosnowski at nvidia.com>

Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh