glibc : Fix CVE-2021-3999

Upstream-Status: Backport [https://sourceware.org/git/?p=glibc.git;a=commit;h=8c8a71c85f2ed5cc90d08d82ce645513fc907cb6]
Upstream-Status: Backport [https://sourceware.org/git/?p=glibc.git;a=commit;h=472e799a5f2102bc0c3206dbd5a801765fceb39c

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Signed-off-by: pgowda <pgowda.cve@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>