[DPDK/ethdev Bug 1554] Use after free in cnxk_ethdev

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=1554

            Bug ID: 1554
           Summary: Use after free in cnxk_ethdev
           Product: DPDK
           Version: 24.11
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: major
          Priority: Normal
         Component: ethdev
          Assignee: dev at dpdk.org
          Reporter: stephen at networkplumber.org
  Target Milestone: ---

If GCC malloc function tracing attributes are added, the the following error is
detected at compile time:

../drivers/net/cnxk/cnxk_ethdev_sec.c: In function
‘cnxk_nix_inl_custom_meta_pool_cb’:
../drivers/common/cnxk/roc_platform.h:196:32: warning: pointer ‘hp’ used after
‘rte_mempool_free’ [-Wuse-after-free]
  196 | #define plt_free               rte_free
../drivers/net/cnxk/cnxk_ethdev_sec.c:140:17: note: in expansion of macro
‘plt_free’
  140 |                 plt_free(hp->pool_config);
      |                 ^~~~~~~~
../drivers/net/cnxk/cnxk_ethdev_sec.c:139:17: note: call to ‘rte_mempool_free’
here
  139 |                 rte_mempool_free(hp);
      |                 ^~~~~~~~~~~~~~~~~~~~

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