[Bug string/33056] Power 10 strcmp clobbers nonvolatile vector registers (CVE-2025-5702)

[carlos at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=33056

--- Comment #8 from Carlos O'Donell <carlos at redhat dot com> ---
Reviewed by Siddhesh Poyarekar. Still needs fixing on 2.41, 2.40, and 2.39.

commit 15808c77b35319e67ee0dc8f984a9a1a434701bc
Author: Carlos O'Donell <carlos@redhat.com>
Date:   Mon Jun 16 13:09:57 2025 -0400

    ppc64le: Revert "powerpc: Optimized strcmp for power10" (CVE-2025-5702)

    This reverts commit 3367d8e180848030d1646f088759f02b8dfe0d6f

    Reason for revert: Power10 strcmp clobbers non-volatile vector
    registers (Bug 33056)

    Tested on ppc64le without regression.

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