mainline inclusion
from mainline-5.17-rc1
commit 78c1f8d0
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5EUVD
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=78c1f8d0634cc35da613d844eda7c849fc50f643

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

Reduce bpf_core_apply_relo_insn() stack usage and bump
BPF_CORE_SPEC_MAX_LEN limit back to 64.

Fixes: 29db4bea ("bpf: Prepare relo_core.c for kernel duty.")
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Signed-off-by: NAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211203182836.16646-1-alexei.starovoitov@gmail.com
(cherry picked from commit 78c1f8d0)
Signed-off-by: NWang Yufen <wangyufen@huawei.com>