mainline inclusion
from mainline-5.13-rc1
commit 7e72aad3
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5Q927
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e72aad3a15c06e40e3ccd2352e5010e978f1acf

-------------------------------------------------

Test the good variants as well as the potential malformed ones.
Signed-off-by: NIlya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NYonghong Song <yhs@fb.com>
Acked-by: NAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210226202256.116518-8-iii@linux.ibm.com
(cherry picked from commit 7e72aad3)
Signed-off-by: NWang Yufen <wangyufen@huawei.com>