audit: bugfix for infinite loop when flush the hold queue

hulk inclusion
category: bugfix
bugzilla: 186133 https://gitee.com/openeuler/kernel/issues/I4RGWS?from=project-issue


CVE: NA

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When we add "audit=1" to the cmdline, if we keep the audit_hold_queue
non-empty, flush the hold queue will fall into an infinite loop. So we
need to fix it by stoping flush the hold queue when netlink abnormal.

Fixes: bd8698d8 ("audit: improve robustness of the audit queue handling")
Signed-off-by: Cui GaoSheng <cuigaosheng1@huawei.com>
Reviewed-by: weiyang wang <wangweiyang2@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>