powerpc/pseries: Fix scv instruction crash with kexec
kexec on pseries disables AIL (reloc_on_exc), required for scv
instruction support, before other CPUs have been shut down. This means
they can execute scv instructions after AIL is disabled, which causes an
interrupt at an unexpected entry location that crashes the kernel.
Change the kexec sequence to disable AIL after other CPUs have been
brought down.
As a refresher, the real-mode scv interrupt vector is 0x17000, and the
fixed-location head code probably couldn't easily deal with implementing
such high addresses so it was just decided not to support that interrupt
at all.
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Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Wed, 16 Jul 2025 13:45:00 +0000
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Tue, 05 Nov 2024 10:15:00 +0000
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Wed, 11 Sep 2024 18:30:00 +0000
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Wed, 11 Sep 2024 13:30:00 +0000
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Fri, 16 Aug 2024 18:45:00 +0000
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Weaknesses | CWE-99 |
Thu, 08 Aug 2024 23:00:00 +0000
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Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2025-05-04T09:24:38.574Z
Reserved: 2024-07-30T07:40:12.250Z
Link: CVE-2024-42230

Updated: 2024-08-02T04:54:32.571Z

Status : Modified
Published: 2024-07-30T08:15:08.193
Modified: 2024-11-21T09:33:46.033
Link: CVE-2024-42230


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