objtool: Handle __sanitize_cov*() tail calls

stable inclusion
from stable-v5.10.133
commit acc0be56b4152046aac56b48a70729925036b187
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5PTAS
CVE: CVE-2022-29900,CVE-2022-23816,CVE-2022-29901

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=acc0be56b4152046aac56b48a70729925036b187



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

commit f56dae88 upstream.

Turns out the compilers also generate tail calls to __sanitize_cov*(),
make sure to also patch those out in noinstr code.

Fixes: 0f1441b4 ("objtool: Fix noinstr vs KCOV")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/20210624095147.818783799@infradead.org


Signed-off-by: Sasha Levin <sashal@kernel.org>
[bwh: Backported to 5.10:
 - objtool doesn't have any mcount handling
 - Write the NOPs as hex literals since we can't use <asm/nops.h>]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Lin Yujun <linyujun809@huawei.com>
Reviewed-by: Zhang Jianhua <chris.zjh@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>