cve-2024-42230
Vulnerability from cvelistv5
Published
2024-07-30 07:47
Modified
2024-12-19 09:14
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: 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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/21a741eb75f80397e5f7d3739e24d7d75e619011Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c6506616386ce37e59b2745fc481c6713fae4f3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c550679d604798d9fed8a5b2bb5693448a25407cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d10e3c39001e9194b9a1bfd6979bd3fa19dccdc5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/21a741eb75f80397e5f7d3739e24d7d75e619011Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8c6506616386ce37e59b2745fc481c6713fae4f3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c550679d604798d9fed8a5b2bb5693448a25407cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d10e3c39001e9194b9a1bfd6979bd3fa19dccdc5Patch
Impacted products
Vendor Product Version
Linux Linux Version: 7fa95f9adaee7e5cbb195d3359741120829e488b
Version: 7fa95f9adaee7e5cbb195d3359741120829e488b
Version: 7fa95f9adaee7e5cbb195d3359741120829e488b
Version: 7fa95f9adaee7e5cbb195d3359741120829e488b
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   Linux Linux Version: 5.9
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