Inject fault while probing kunit-example-test.ko, the duprule which
is allocated by kzalloc in vcap_dup_rule() of
test_vcap_xn_rule_creator() is not freed, and it cause the memory leaks
below. Use vcap_del_rule() to free them as other functions do it.

unreferenced object 0xffff6eb4846f6180 (size 192):
  comm "kunit_try_catch", pid 405, jiffies 4294895522 (age 880.004s)
  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 98 61 6f 84 b4 6e ff ff  .........ao..n..
  backtrace:
    [<00000000f1b5b86e>] slab_post_alloc_hook+0xb8/0x368
    [<00000000c56cdd9a>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000046ef1b64>] kmalloc_trace+0x40/0x164
    [<000000008565145b>] vcap_dup_rule+0x38/0x210
    [<00000000bd9e1f12>] vcap_add_rule+0x29c/0x32c
    [<0000000070a539b1>] test_vcap_xn_rule_creator.constprop.43+0x120/0x330
    [<00000000d2ac4ccb>] vcap_api_rule_insert_in_order_test+0xa4/0x114
    [<000000000f88f9cb>] kunit_try_run_case+0x50/0xac
    [<00000000e848de5a>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<0000000058a88b6b>] kthread+0x124/0x130
    [<00000000891cf28a>] ret_from_fork+0x10/0x20
unreferenced object 0xffff6eb4846f6240 (size 192):
  comm "kunit_try_catch", pid 405, jiffies 4294895524 (age 879.996s)
  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 58 62 6f 84 b4 6e ff ff  ........Xbo..n..
  backtrace:
    [<00000000f1b5b86e>] slab_post_alloc_hook+0xb8/0x368
    [<00000000c56cdd9a>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000046ef1b64>] kmalloc_trace+0x40/0x164
    [<000000008565145b>] vcap_dup_rule+0x38/0x210
    [<00000000bd9e1f12>] vcap_add_rule+0x29c/0x32c
    [<0000000070a539b1>] test_vcap_xn_rule_creator.constprop.43+0x120/0x330
    [<0000000052e6ad35>] vcap_api_rule_insert_in_order_test+0xbc/0x114
    [<000000000f88f9cb>] kunit_try_run_case+0x50/0xac
    [<00000000e848de5a>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<0000000058a88b6b>] kthread+0x124/0x130
    [<00000000891cf28a>] ret_from_fork+0x10/0x20
unreferenced object 0xffff6eb4846f6300 (size 192):
  comm "kunit_try_catch", pid 405, jiffies 4294895524 (age 879.996s)
  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 18 63 6f 84 b4 6e ff ff  .........co..n..
  backtrace:
    [<00000000f1b5b86e>] slab_post_alloc_hook+0xb8/0x368
    [<00000000c56cdd9a>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000046ef1b64>] kmalloc_trace+0x40/0x164
    [<000000008565145b>] vcap_dup_rule+0x38/0x210
    [<00000000bd9e1f12>] vcap_add_rule+0x29c/0x32c
    [<0000000070a539b1>] test_vcap_xn_rule_creator.constprop.43+0x120/0x330
    [<000000001b0895d4>] vcap_api_rule_insert_in_order_test+0xd4/0x114
    [<000000000f88f9cb>] kunit_try_run_case+0x50/0xac
    [<00000000e848de5a>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<0000000058a88b6b>] kthread+0x124/0x130
    [<00000000891cf28a>] ret_from_fork+0x10/0x20
unreferenced object 0xffff6eb4846f63c0 (size 192):
  comm "kunit_try_catch", pid 405, jiffies 4294895524 (age 880.012s)
  hex dump (first 32 bytes):
    10 27 00 00 04 00 00 00 28 00 00 00 c8 00 00 00  .'......(.......
    00 00 00 00 00 00 00 00 d8 63 6f 84 b4 6e ff ff  .........co..n..
  backtrace:
    [<00000000f1b5b86e>] slab_post_alloc_hook+0xb8/0x368
    [<00000000c56cdd9a>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000046ef1b64>] kmalloc_trace+0x40/0x164
    [<000000008565145b>] vcap_dup_rule+0x38/0x210
    [<00000000bd9e1f12>] vcap_add_rule+0x29c/0x32c
    [<0000000070a539b1>] test_vcap_xn_rule_creator.constprop.43+0x120/0x330
    [<00000000134c151f>] vcap_api_rule_insert_in_order_test+0xec/0x114
    [<000000000f88f9cb>] kunit_try_run_case+0x50/0xac
    [<00000000e848de5a>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<0000000058a88b6b>] kthread+0x124/0x130
    [<00000000891cf28a>] ret_from_fork+0x10/0x20
unreferenced object 0xffff6eb4845fc180 (size 192):
  comm "kunit_try_catch", pid 407, jiffies 4294895527 (age 880.000s)
  hex dump (first 32 bytes):
    10 27 00 00 04 00 00 00 14 00 00 00 c8 00 00 00  .'..............
    00 00 00 00 00 00 00 00 98 c1 5f 84 b4 6e ff ff  .........._..n..
  backtrace:
    [<00000000f1b5b86e>] slab_post_alloc_hook+0xb8/0x368
    [<00000000c56cdd9a>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000046ef1b64>] kmalloc_trace+0x40/0x164
    [<000000008565145b>] vcap_dup_rule+0x38/0x210
    [<00000000bd9e1f12>] vcap_add_rule+0x29c/0x32c
    [<0000000070a539b1>] test_vcap_xn_rule_creator.constprop.43+0x120/0x330
    [<00000000fa5f64d3>] vcap_api_rule_insert_reverse_order_test+0xc8/0x600
    [<000000000f88f9cb>] kunit_try_run_case+0x50/0xac
    [<00000000e848de5a>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<0000000058a88b6b>] kthread+0x124/0x130
    [<00000000891cf28a>] ret_from_fork+0x10/0x20
unreferenced object 0xffff6eb4845fc240 (size 192):
  comm "kunit_try_catch", pid 407, jiffies 4294895527 (age 880.000s)
  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 58 c2 5f 84 b4 6e ff ff  ........X._..n..
  backtrace:
    [<00000000f1b5b86e>] slab_post_alloc_hook+0xb8/0x368
    [<00000000c56cdd9a>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000046ef1b64>] kmalloc_trace+0x40/0x164
    [<000000008565145b>] vcap_dup_rule+0x38/0x210
    [<00000000453dcd80>] vcap_add_rule+0x134/0x32c
    [<0000000070a539b1>] test_vcap_xn_rule_creator.constprop.43+0x120/0x330
    [<00000000a7db42de>] vcap_api_rule_insert_reverse_order_test+0x108/0x600
    [<000000000f88f9cb>] kunit_try_run_case+0x50/0xac
    [<00000000e848de5a>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<0000000058a88b6b>] kthread+0x124/0x130
    [<00000000891cf28a>] ret_from_fork+0x10/0x20
unreferenced object 0xffff6eb4845fc300 (size 192):
  comm "kunit_try_catch", pid 407, jiffies 4294895527 (age 880.000s)
  hex dump (first 32 bytes):
    10 27 00 00 04 00 00 00 28 00 00 00 90 01 00 00  .'......(.......
    00 00 00 00 00 00 00 00 18 c3 5f 84 b4 6e ff ff  .........._..n..
  backtrace:
    [<00000000f1b5b86e>] slab_post_alloc_hook+0xb8/0x368
    [<00000000c56cdd9a>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000046ef1b64>] kmalloc_trace+0x40/0x164
    [<000000008565145b>] vcap_dup_rule+0x38/0x210
    [<00000000453dcd80>] vcap_add_rule+0x134/0x32c
    [<0000000070a539b1>] test_vcap_xn_rule_creator.constprop.43+0x120/0x330
    [<00000000ea416c94>] vcap_api_rule_insert_reverse_order_test+0x150/0x600
    [<000000000f88f9cb>] kunit_try_run_case+0x50/0xac
    [<00000000e848de5a>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<0000000058a88b6b>] kthread+0x124/0x130
    [<00000000891cf28a>] ret_from_fork+0x10/0x20
unreferenced object 0xffff6eb4845fc3c0 (size 192):
  comm "kunit_try_catch", pid 407, jiffies 4294895527 (age 880.020s)
  hex dump (first 32 bytes):
    10 27 00 00 04 00 00 00 32 00 00 00 f4 01 00 00  .'......2.......
    00 00 00 00 00 00 00 00 d8 c3 5f 84 b4 6e ff ff  .........._..n..
  backtrace:
    [<00000000f1b5b86e>] slab_post_alloc_hook+0xb8/0x368
    [<00000000c56cdd9a>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000046ef1b64>] kmalloc_trace+0x40/0x164
    [<000000008565145b>] vcap_dup_rule+0x38/0x210
    [<00000000453dcd80>] vcap_add_rule+0x134/0x32c
    [<0000000070a539b1>] test_vcap_xn_rule_creator.constprop.43+0x120/0x330
    [<00000000764a39b4>] vcap_api_rule_insert_reverse_order_test+0x198/0x600
    [<000000000f88f9cb>] kunit_try_run_case+0x50/0xac
    [<00000000e848de5a>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<0000000058a88b6b>] kthread+0x124/0x130
    [<00000000891cf28a>] ret_from_fork+0x10/0x20
unreferenced object 0xffff6eb484cd4240 (size 192):
  comm "kunit_try_catch", pid 413, jiffies 4294895543 (age 879.956s)
  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 58 42 cd 84 b4 6e ff ff  ........XB...n..
  backtrace:
    [<00000000f1b5b86e>] slab_post_alloc_hook+0xb8/0x368
    [<00000000c56cdd9a>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000046ef1b64>] kmalloc_trace+0x40/0x164
    [<000000008565145b>] vcap_dup_rule+0x38/0x210
    [<00000000bd9e1f12>] vcap_add_rule+0x29c/0x32c
    [<0000000070a539b1>] test_vcap_xn_rule_creator.constprop.43+0x120/0x330
    [<0000000023976dd4>] vcap_api_rule_remove_in_front_test+0x158/0x658
    [<000000000f88f9cb>] kunit_try_run_case+0x50/0xac
    [<00000000e848de5a>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<0000000058a88b6b>] kthread+0x124/0x130
    [<00000000891cf28a>] ret_from_fork+0x10/0x20
unreferenced object 0xffff6eb484cd4300 (size 192):
  comm "kunit_try_catch", pid 413, jiffies 4294895543 (age 879.956s)
  hex dump (first 32 bytes):
    10 27 00 00 04 00 00 00 28 00 00 00 c8 00 00 00  .'......(.......
    00 00 00 00 00 00 00 00 18 43 cd 84 b4 6e ff ff  .........C...n..
  backtrace:
    [<00000000f1b5b86e>] slab_post_alloc_hook+0xb8/0x368
    [<00000000c56cdd9a>] __kmem_cache_alloc_node+0x174/0x290
    [<0000000046ef1b64>] kmalloc_trace+0x40/0x164
    [<000000008565145b>] vcap_dup_rule+0x38/0x210
    [<00000000bd9e1f12>] vcap_add_rule+0x29c/0x32c
    [<0000000070a539b1>] test_vcap_xn_rule_creator.constprop.43+0x120/0x330
    [<000000000b4760ff>] vcap_api_rule_remove_in_front_test+0x170/0x658
    [<000000000f88f9cb>] kunit_try_run_case+0x50/0xac
    [<00000000e848de5a>] kunit_generic_run_threadfn_adapter+0x20/0x2c
    [<0000000058a88b6b>] kthread+0x124/0x130
    [<00000000891cf28a>] 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>
Signed-off-by: David S. Miller <davem@davemloft.net>