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    Subject[PATCH -next 5/5] mm/kmemleak-test: Add a test case for alloc_percpu
    Date
    After insmod kmemleak-test.ko, a leaking for alloc_percpu will be
    reported as below:

    kmemleak: alloc_percpu(sizeof(*elem)) = 00007dfdd26a2c40
    :
    :
    unreferenced object 0x7dfdd26a2c40 (size 8):
    comm "insmod", pid 183, jiffies 4294905864 (age 40.520s)
    hex dump (first 8 bytes):
    00 00 00 00 00 00 00 00 ........
    backtrace:
    [<(____ptrval____)>] pcpu_alloc+0x3ec/0x8c8
    [<(____ptrval____)>] __alloc_percpu+0x18/0x28
    [<(____ptrval____)>] 0xffff800008df525c
    [<(____ptrval____)>] do_one_initcall+0x60/0x1d8
    [<(____ptrval____)>] do_init_module+0x58/0x1d0
    [<(____ptrval____)>] load_module+0x1d8c/0x23d0
    [<(____ptrval____)>] __do_sys_finit_module+0xdc/0xf8
    [<(____ptrval____)>] __arm64_sys_finit_module+0x20/0x30
    [<(____ptrval____)>] el0_svc_common.constprop.3+0x68/0x170
    [<(____ptrval____)>] do_el0_svc+0x24/0x90
    [<(____ptrval____)>] el0_sync_handler+0x13c/0x1a8
    [<(____ptrval____)>] el0_sync+0x158/0x180

    Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
    Signed-off-by: Chen Jun <chenjun102@huawei.com>
    ---
    mm/kmemleak-test.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/mm/kmemleak-test.c b/mm/kmemleak-test.c
    index 75fe1b8c3226..8f3e4a60166b 100644
    --- a/mm/kmemleak-test.c
    +++ b/mm/kmemleak-test.c
    @@ -79,6 +79,9 @@ static int __init kmemleak_test_init(void)
    per_cpu(kmemleak_test_pointer, i));
    }

    + pr_info("alloc_percpu(sizeof(*elem)) = %px\n",
    + alloc_percpu(sizeof(*elem)));
    +
    return 0;
    }
    module_init(kmemleak_test_init);
    --
    2.25.0
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