prlimit: do_prlimit needs to have a speculation check

stable inclusion
from stable-v5.10.165
commit 9f8e45720e0e7edb661d0082422f662ed243d8d8
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6Z6SU?from=project-issue
CVE: CVE-2023-0458

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=9f8e45720e0e7edb661d0082422f662ed243d8d8



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[ Upstream commit 73979060 ]

do_prlimit() adds the user-controlled resource value to a pointer that
will subsequently be dereferenced.  In order to help prevent this
codepath from being used as a spectre "gadget" a barrier needs to be
added after checking the range.

Reported-by: Jordy Zomer <jordyzomer@google.com>
Tested-by: Jordy Zomer <jordyzomer@google.com>
Suggested-by: Linus Torvalds <torvalds@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Xia Fukun <xiafukun@huawei.com>
Reviewed-by: Zhang Qiao <zhangqiao22@huawei.com>
Reviewed-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>