[dpdk-dev] [PATCH 3/4] net/mlx5: fix PMD crash after tunnel offload match rule destruction

[Slava Ovsiienko]

> -----Original Message-----
> From: Gregory Etelson <getelson at nvidia.com>
> Sent: Wednesday, November 11, 2020 9:14
> To: dev at dpdk.org
> Cc: Gregory Etelson <getelson at nvidia.com>; Matan Azrad
> <matan at nvidia.com>; Raslan Darawsheh <rasland at nvidia.com>; Shahaf
> Shuler <shahafs at nvidia.com>; Slava Ovsiienko <viacheslavo at nvidia.com>;
> Xueming(Steven) Li <xuemingl at nvidia.com>
> Subject: [PATCH 3/4] net/mlx5: fix PMD crash after tunnel offload match rule
> destruction
> 
> The new flow table resource management API triggered a PMD crash in tunnel
> offload mode, when tunnel match flow rule was inserted before tunnel set
> rule.
> 
> Reason for the crash was double flow table registration. The table was
> registered by the tunnel offload code for the first time and once more by PMD
> code, as part of general table processing. The table counter was decremented
> only once during the rule destruction and caused a resource leak that triggered
> the crash.
> 
> The patch updates PMD registration with tunnel offload parameters and
> removes table registration in tunnel related code.
> 
> Fixes: 663ad57dabb2 ("net/mlx5: make flow table cache thread safe")
> 
> Signed-off-by: Gregory Etelson <getelson at nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>