Inject fault while probing kunit-example-test.ko, the rule which
is allocated by kzalloc in vcap_alloc_rule(), the field which is
allocated by kzalloc in vcap_rule_add_action() and
vcap_rule_add_key() is not freed, and it cause the memory leaks
below. Use vcap_free_rule() to free them as other drivers do it.

And since the return rule of test_vcap_xn_rule_creator() is not
used, remove it and switch to void.

unreferenced object 0xffff058383334240 (size 192):
  comm "kunit_try_catch", pid 309, jiffies 4294894222 (age 639.800s)
  hex dump (first 32 bytes):
    10 27 00 00 04 00 00 00 14 00 00 00 90 01 00 00  .'..............
    00 00 00 00 00 00 00 00 00 81 93 84 83 05 ff ff  ................
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<00000000648fefae>] vcap_alloc_rule+0x17c/0x26c
    [<000000004da16164>] test_vcap_xn_rule_creator.constprop.43+0xac/0x328
    [<00000000231b1097>] vcap_api_rule_insert_in_order_test+0xcc/0x184
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20
unreferenced object 0xffff0583849380c0 (size 64):
  comm "kunit_try_catch", pid 309, jiffies 4294894222 (age 639.800s)
  hex dump (first 32 bytes):
    40 81 93 84 83 05 ff ff 68 42 33 83 83 05 ff ff  @.......hB3.....
    22 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00  "...............
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<00000000ee41df9e>] vcap_rule_add_action+0x104/0x178
    [<000000001cc1bb38>] test_vcap_xn_rule_creator.constprop.43+0xd8/0x328
    [<00000000231b1097>] vcap_api_rule_insert_in_order_test+0xcc/0x184
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20
unreferenced object 0xffff058384938100 (size 64):
  comm "kunit_try_catch", pid 309, jiffies 4294894222 (age 639.800s)
  hex dump (first 32 bytes):
    80 81 93 84 83 05 ff ff 58 42 33 83 83 05 ff ff  ........XB3.....
    7d 00 00 00 01 00 00 00 02 00 00 00 ff 00 00 00  }...............
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<0000000043c78991>] vcap_rule_add_key+0x104/0x180
    [<00000000ba73cfbe>] vcap_add_type_keyfield+0xfc/0x128
    [<000000002b00f7df>] vcap_val_rule+0x274/0x3e8
    [<00000000e67d2ff5>] test_vcap_xn_rule_creator.constprop.43+0xf0/0x328
    [<00000000231b1097>] vcap_api_rule_insert_in_order_test+0xcc/0x184
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20

unreferenced object 0xffff0583833b6240 (size 192):
  comm "kunit_try_catch", pid 311, jiffies 4294894225 (age 639.844s)
  hex dump (first 32 bytes):
    10 27 00 00 04 00 00 00 1e 00 00 00 2c 01 00 00  .'..........,...
    00 00 00 00 00 00 00 00 40 91 8f 84 83 05 ff ff  ........@.......
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<00000000648fefae>] vcap_alloc_rule+0x17c/0x26c
    [<000000004da16164>] test_vcap_xn_rule_creator.constprop.43+0xac/0x328
    [<00000000509de3f4>] vcap_api_rule_insert_reverse_order_test+0x10c/0x654
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20
unreferenced object 0xffff0583848f9100 (size 64):
  comm "kunit_try_catch", pid 311, jiffies 4294894225 (age 639.844s)
  hex dump (first 32 bytes):
    80 91 8f 84 83 05 ff ff 68 62 3b 83 83 05 ff ff  ........hb;.....
    22 00 00 00 01 00 00 00 00 00 00 00 a5 b4 ff ff  "...............
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<00000000ee41df9e>] vcap_rule_add_action+0x104/0x178
    [<000000001cc1bb38>] test_vcap_xn_rule_creator.constprop.43+0xd8/0x328
    [<00000000509de3f4>] vcap_api_rule_insert_reverse_order_test+0x10c/0x654
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20
unreferenced object 0xffff0583848f9140 (size 64):
  comm "kunit_try_catch", pid 311, jiffies 4294894225 (age 639.844s)
  hex dump (first 32 bytes):
    c0 91 8f 84 83 05 ff ff 58 62 3b 83 83 05 ff ff  ........Xb;.....
    7d 00 00 00 01 00 00 00 02 00 00 00 ff 00 00 00  }...............
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<0000000043c78991>] vcap_rule_add_key+0x104/0x180
    [<00000000ba73cfbe>] vcap_add_type_keyfield+0xfc/0x128
    [<000000002b00f7df>] vcap_val_rule+0x274/0x3e8
    [<00000000e67d2ff5>] test_vcap_xn_rule_creator.constprop.43+0xf0/0x328
    [<00000000509de3f4>] vcap_api_rule_insert_reverse_order_test+0x10c/0x654
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20

unreferenced object 0xffff05838264e0c0 (size 192):
  comm "kunit_try_catch", pid 313, jiffies 4294894230 (age 639.864s)
  hex dump (first 32 bytes):
    10 27 00 00 04 00 00 00 0a 00 00 00 f4 01 00 00  .'..............
    00 00 00 00 00 00 00 00 40 3a 97 84 83 05 ff ff  ........@:......
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<00000000648fefae>] vcap_alloc_rule+0x17c/0x26c
    [<000000004da16164>] test_vcap_xn_rule_creator.constprop.43+0xac/0x328
    [<00000000a29794d8>] vcap_api_rule_remove_at_end_test+0xbc/0xb48
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20
unreferenced object 0xffff058384973a80 (size 64):
  comm "kunit_try_catch", pid 313, jiffies 4294894230 (age 639.864s)
  hex dump (first 32 bytes):
    e8 e0 64 82 83 05 ff ff e8 e0 64 82 83 05 ff ff  ..d.......d.....
    22 00 00 00 01 00 00 00 00 00 00 00 00 80 ff ff  "...............
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<00000000ee41df9e>] vcap_rule_add_action+0x104/0x178
    [<000000001cc1bb38>] test_vcap_xn_rule_creator.constprop.43+0xd8/0x328
    [<00000000a29794d8>] vcap_api_rule_remove_at_end_test+0xbc/0xb48
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20
unreferenced object 0xffff058384973a40 (size 64):
  comm "kunit_try_catch", pid 313, jiffies 4294894230 (age 639.880s)
  hex dump (first 32 bytes):
    80 39 97 84 83 05 ff ff d8 e0 64 82 83 05 ff ff  .9........d.....
    7d 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00  }...............
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<0000000043c78991>] vcap_rule_add_key+0x104/0x180
    [<0000000094335477>] vcap_add_type_keyfield+0xbc/0x128
    [<000000002b00f7df>] vcap_val_rule+0x274/0x3e8
    [<00000000e67d2ff5>] test_vcap_xn_rule_creator.constprop.43+0xf0/0x328
    [<00000000a29794d8>] vcap_api_rule_remove_at_end_test+0xbc/0xb48
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20

unreferenced object 0xffff0583832fa240 (size 192):
  comm "kunit_try_catch", pid 315, jiffies 4294894233 (age 639.920s)
  hex dump (first 32 bytes):
    10 27 00 00 04 00 00 00 14 00 00 00 90 01 00 00  .'..............
    00 00 00 00 00 00 00 00 00 a1 8b 84 83 05 ff ff  ................
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<00000000648fefae>] vcap_alloc_rule+0x17c/0x26c
    [<000000004da16164>] test_vcap_xn_rule_creator.constprop.43+0xac/0x328
    [<00000000be638a45>] vcap_api_rule_remove_in_middle_test+0xc4/0xb80
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20
unreferenced object 0xffff0583848ba0c0 (size 64):
  comm "kunit_try_catch", pid 315, jiffies 4294894233 (age 639.920s)
  hex dump (first 32 bytes):
    40 a1 8b 84 83 05 ff ff 68 a2 2f 83 83 05 ff ff  @.......h./.....
    22 00 00 00 01 00 00 00 00 00 00 00 00 80 ff ff  "...............
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<00000000ee41df9e>] vcap_rule_add_action+0x104/0x178
    [<000000001cc1bb38>] test_vcap_xn_rule_creator.constprop.43+0xd8/0x328
    [<00000000be638a45>] vcap_api_rule_remove_in_middle_test+0xc4/0xb80
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20
unreferenced object 0xffff0583848ba100 (size 64):
  comm "kunit_try_catch", pid 315, jiffies 4294894233 (age 639.920s)
  hex dump (first 32 bytes):
    80 a1 8b 84 83 05 ff ff 58 a2 2f 83 83 05 ff ff  ........X./.....
    7d 00 00 00 01 00 00 00 02 00 00 00 ff 00 00 00  }...............
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<0000000043c78991>] vcap_rule_add_key+0x104/0x180
    [<00000000ba73cfbe>] vcap_add_type_keyfield+0xfc/0x128
    [<000000002b00f7df>] vcap_val_rule+0x274/0x3e8
    [<00000000e67d2ff5>] test_vcap_xn_rule_creator.constprop.43+0xf0/0x328
    [<00000000be638a45>] vcap_api_rule_remove_in_middle_test+0xc4/0xb80
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20

unreferenced object 0xffff0583827d2180 (size 192):
  comm "kunit_try_catch", pid 317, jiffies 4294894238 (age 639.956s)
  hex dump (first 32 bytes):
    10 27 00 00 04 00 00 00 14 00 00 00 90 01 00 00  .'..............
    00 00 00 00 00 00 00 00 00 e1 06 83 83 05 ff ff  ................
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<00000000648fefae>] vcap_alloc_rule+0x17c/0x26c
    [<000000004da16164>] test_vcap_xn_rule_creator.constprop.43+0xac/0x328
    [<00000000e1ed8350>] vcap_api_rule_remove_in_front_test+0x144/0x6c0
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20
unreferenced object 0xffff05838306e0c0 (size 64):
  comm "kunit_try_catch", pid 317, jiffies 4294894238 (age 639.956s)
  hex dump (first 32 bytes):
    40 e1 06 83 83 05 ff ff a8 21 7d 82 83 05 ff ff  @........!}.....
    22 00 00 00 01 00 00 00 00 00 00 00 00 80 ff ff  "...............
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<00000000ee41df9e>] vcap_rule_add_action+0x104/0x178
    [<000000001cc1bb38>] test_vcap_xn_rule_creator.constprop.43+0xd8/0x328
    [<00000000e1ed8350>] vcap_api_rule_remove_in_front_test+0x144/0x6c0
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20
unreferenced object 0xffff05838306e180 (size 64):
  comm "kunit_try_catch", pid 317, jiffies 4294894238 (age 639.968s)
  hex dump (first 32 bytes):
    98 21 7d 82 83 05 ff ff 00 e1 06 83 83 05 ff ff  .!}.............
    67 00 00 00 00 00 00 00 01 01 00 00 ff 00 00 00  g...............
  backtrace:
    [<000000008585a8f7>] slab_post_alloc_hook+0xb8/0x368
    [<00000000795eba12>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000061886991>] kmalloc_trace+0x40/0x164
    [<0000000043c78991>] vcap_rule_add_key+0x104/0x180
    [<000000006ce4945d>] test_add_def_fields+0x84/0x8c
    [<00000000507e0ab6>] vcap_val_rule+0x294/0x3e8
    [<00000000e67d2ff5>] test_vcap_xn_rule_creator.constprop.43+0xf0/0x328
    [<00000000e1ed8350>] vcap_api_rule_remove_in_front_test+0x144/0x6c0
    [<00000000548b559e>] kunit_try_run_case+0x50/0xac
    [<00000000663f0105>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<00000000e646f120>] kthread+0x124/0x130
    [<000000005257599e>] ret_from_fork+0x10/0x20

Fixes: dccc30cc ("net: microchip: sparx5: Add KUNIT test of counters and sorted rules")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202309090950.uOTEKQq3-lkp@intel.com/Signed-off-by: David S. Miller <davem@davemloft.net>