mainline inclusion
from mainline-5.17-rc1
commit 8cb12556
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=8cb125566c40b7141d8842c534f0ea5820ee3d5c

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glob_syms array wasn't freed on bpf_link__free(). Fix that.

Fixes: a4634922 ("libbpf: Add linker extern resolution support for functions and global variables")
Signed-off-by: NAndrii Nakryiko <andrii@kernel.org>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211124002325.1737739-6-andrii@kernel.org
(cherry picked from commit 8cb12556)
Signed-off-by: NWang Yufen <wangyufen@huawei.com>