CVE-2025-21785: arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array

CKI Backport Botrequested to merge
redhat/red-hat-ci-tools/kernel/bot-branches/centos-stream/src/kernel/centos-stream-10:backport-RHEL-81669-centos-stream-10-main into main

JIRA: https://issues.redhat.com/browse/RHEL-81669
CVE: CVE-2025-21785

commit 875d742cf5327c93cba1f11e12b08d3cce7a88d2
Author: Radu Rendec <rrendec@redhat.com>
Date:   Thu Feb 6 12:44:20 2025 -0500

    arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array
    
    The loop that detects/populates cache information already has a bounds
    check on the array size but does not account for cache levels with
    separate data/instructions cache. Fix this by incrementing the index
    for any populated leaf (instead of any populated level).
    
    Fixes: 5d425c186537 ("arm64: kernel: add support for cpu cache information")
    
    Signed-off-by: Radu Rendec <rrendec@redhat.com>
    Link: https://lore.kernel.org/r/20250206174420.2178724-1-rrendec@redhat.com
    Signed-off-by: Will Deacon <will@kernel.org>```

Signed-off-by: CKI Backport Bot <cki-ci-bot+cki-gitlab-backport-bot@redhat.com>

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