[Bug 1366] mlx5 secondary testpmd process crash when calling rte_eth_stats_get

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=1366

            Bug ID: 1366
           Summary: mlx5 secondary testpmd process crash when calling
                    rte_eth_stats_get
           Product: DPDK
           Version: 22.11
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: Normal
         Component: eventdev
          Assignee: dev at dpdk.org
          Reporter: aidan at peralex.com
  Target Milestone: ---

Created attachment 271
  --> https://bugs.dpdk.org/attachment.cgi?id=271&action=edit
Secondary lldb process output

Linux:
AlmaLinux 9.3

Kernel:
5.14.0-362.8.1.el9_3.x86_64

Software version:
rdma-core-48.0-1.el9.x86_64
dpdk-v22.11(tested on git branch v23.11-rc4 as well)

Hardware:
Mellanox Technologies MT27800 Family [ConnectX-5]

Running two testpmd processes at the same time causes the secondary process to
crash with a segmentation fault from the libmlx5.so library. Two ports on a
Mellanox MT27800 card are configured to be used by both testpmd apps.
The two separate instances are launched:
1. dpdk-testpmd --proc-type=primary
2. dpdk-testpmd --proc-type=secondary

I am not sure if this is a rdma-core issue which contains the libmlx5.so
library where segmentation fault is thrown from. The primary dpdk process runs
without any issues and there are no segfaults. The rte_eth_stats_get function
only throws an error on the secondary process, not on the primary process. 
Attached is the lldb output when running a debug build secondary process with
lldb.

Running dmesg also shows that there is a segfault:
dpdk-testpmd[67695]: segfault at b077f90 ip 00007f1ae42069e4 sp
00007ffcd49903b8 error 4 in libmlx5.so.1.24.48.0[7f1ae41b5000+5a000] likely on
CPU 0 (core 0, socket 0)
Code: 77 90 0f b6 d2 48 8d 05 7a a3 00 00 44 0f be 24 10 e9 7c ff ff ff e8 fb
f3 fa ff 66 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa <48> 
8b 07 49 89 d2 4c 8d 0d 4f 88 01 00 48 8b 10 48 8b 92 98 02 00

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