s390/mm: Fix VM_FAULT_HWPOISON handling in do_exception()
There is no support for HWPOISON, MEMORY_FAILURE, or ARCH_HAS_COPY_MC on
s390. Therefore we do not expect to see VM_FAULT_HWPOISON in
do_exception().
However, since commit af19487f00f3 ("mm: make PTE_MARKER_SWAPIN_ERROR more
general"), it is possible to see VM_FAULT_HWPOISON in combination with
PTE_MARKER_POISONED, even on architectures that do not support HWPOISON
otherwise. In this case, we will end up on the BUG() in do_exception().
Fix this by treating VM_FAULT_HWPOISON the same as VM_FAULT_SIGBUS, similar
to x86 when MEMORY_FAILURE is not configured. Also print unexpected fault
flags, for easier debugging.
Note that VM_FAULT_HWPOISON_LARGE is not expected, because s390 cannot
support swap entries on other levels than PTE level.
Metrics
Affected Vendors & Products
Fri, 20 Dec 2024 20:15:00 +0000
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ssvc
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Sun, 15 Sep 2024 18:30:00 +0000
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ssvc
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Wed, 11 Sep 2024 13:30:00 +0000
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ssvc
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Fri, 06 Sep 2024 13:45:00 +0000
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Weaknesses | CWE-119 CWE-388 |
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cvssV3_1
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cvssV3_1
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Sun, 11 Aug 2024 13:00:00 +0000
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References |
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Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2025-05-04T09:20:16.757Z
Reserved: 2024-07-12T12:17:45.613Z
Link: CVE-2024-41021

Updated: 2024-08-02T04:39:56.086Z

Status : Awaiting Analysis
Published: 2024-07-29T14:15:03.870
Modified: 2024-11-21T09:32:04.980
Link: CVE-2024-41021


Updated: 2025-07-12T22:23:25Z