CVE-2024-41055 kernel: mm: prevent derefencing NULL ptr in pfn_section_valid()

Audra Mitchellrequested to merge
aubaker/centos-stream-9:rhel51138 into main

JIRA: https://issues.redhat.com/browse/RHEL-51138
CVE: CVE-2024-41055

Backporting two fixes to resolve CVE-2024-41055.

Signed-off-by: Audra Mitchell audra@redhat.com

Edited by Audra Mitchell

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