[LTP] fs/acl: Add ACL_USER_OBJ permission test

[linuxtestproject.agent@gmail.com]

Hi Sachin,

On Mon, 15 Jun 2026, Sachin Sant wrote:
> fs/acl: Add ACL_USER_OBJ permission test

--- [PATCH 5/8] ---

> +static void test_chown_acl(void)
> +{
> ...
> +	if (acl_set_file(TESTFILE, ACL_TYPE_ACCESS, acl) < 0) {
> +		acl_free(acl);
> +		cleanup_testfile();
> +		if (errno == EOPNOTSUPP)
> +			tst_brk(TCONF | TERRNO, "ACL not supported");
> +		tst_brk(TBROK | TERRNO, "acl_set_file failed");
> +	}

The errno check for EOPNOTSUPP happens after acl_free() and
cleanup_testfile(). cleanup_testfile() calls unlink() internally,
and POSIX does not guarantee that errno is preserved after a
successful syscall. If unlink() clobbers errno, the EOPNOTSUPP
check silently fails and the test reports TBROK instead of TCONF.

test_chmod_acl() in the same file checks errno first:

    if (acl_set_file(...) < 0) {
        if (errno == EOPNOTSUPP) {
            acl_free(acl);
            cleanup_testfile();
            tst_brk(TCONF | TERRNO, ...);
        }
        acl_free(acl);
        cleanup_testfile();
        tst_brk(TBROK | TERRNO, ...);
    }

Could test_chown_acl() use the same pattern?

Verdict - Needs revision

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