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    Subject[PATCH 2/6] selftests/clone3: add a check for invalid exit_signal
    Check that the kernel fails calls with exit_signal with non-zero highest
    32 bits.

    * tools/testing/selftests/clone3/clone3.c (enum test_mode): Add
    CLONE3_ARGS_BIG_EXIT_SIGNAL.
    (call_clone3): Add args.exit_signal initialisation in case
    test_mode == CLONE3_ARGS_BIG_EXIT_SIGNAL.
    (main): Add test_clone3 clone check with
    test_mode == CLONE3_ARGS_BIG_EXIT_SIGNAL.

    Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>
    ---
    tools/testing/selftests/clone3/clone3.c | 9 +++++++++
    1 file changed, 9 insertions(+)

    diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
    index 7b65ee5..4f23a0c 100644
    --- a/tools/testing/selftests/clone3/clone3.c
    +++ b/tools/testing/selftests/clone3/clone3.c
    @@ -28,6 +28,7 @@ enum test_mode {
    CLONE3_ARGS_NO_TEST,
    CLONE3_ARGS_ALL_0,
    CLONE3_ARGS_ALL_1,
    + CLONE3_ARGS_BIG_EXIT_SIGNAL,
    };

    static pid_t raw_clone(struct clone_args *args, size_t size)
    @@ -72,6 +73,10 @@ static int call_clone3(int flags, size_t size, enum test_mode test_mode)
    args.tls = 1;
    args.set_tid = 1;
    break;
    +
    + case CLONE3_ARGS_BIG_EXIT_SIGNAL:
    + args.exit_signal = 0xbadc0ded00000000;
    + break;
    }

    pid = raw_clone(&args, size);
    @@ -146,6 +151,10 @@ int main(int argc, char *argv[])
    /* Do a clone3() with all members set to 1 */
    if (test_clone3(0, CLONE3_ARGS_SIZE_V0, -EINVAL, CLONE3_ARGS_ALL_1))
    goto on_error;
    + /* Do a clone3() with exit_signal having highest 32 bits non-zero */
    + if (test_clone3(0, CLONE3_ARGS_SIZE_V0, -EINVAL,
    + CLONE3_ARGS_BIG_EXIT_SIGNAL))
    + goto on_error;
    /*
    * Do a clone3() with sizeof(struct clone_args) + 8
    * and all members set to 0.
    --
    2.1.4
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