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ucounts: Handle wrapping in is_ucounts_overlimit
commit 0cbae9e upstream. While examining is_ucounts_overlimit and reading the various messages I realized that is_ucounts_overlimit fails to deal with counts that may have wrapped. Being wrapped should be a transitory state for counts and they should never be wrapped for long, but it can happen so handle it. Cc: stable@vger.kernel.org Fixes: 21d1c5e ("Reimplement RLIMIT_NPROC on top of ucounts") Link: https://lkml.kernel.org/r/20220216155832.680775-5-ebiederm@xmission.com Reviewed-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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