github - ghsa-mm8h-h7mm-pwwr

ghsa-mm8h-h7mm-pwwr

Vulnerability from github

Published

2024-07-29 15:30

Modified

2024-08-12 15:30

Details

In the Linux kernel, the following vulnerability has been resolved:

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-41021"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-29T14:15:03Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/mm: Fix VM_FAULT_HWPOISON handling in do_exception()\n\nThere is no support for HWPOISON, MEMORY_FAILURE, or ARCH_HAS_COPY_MC on\ns390. Therefore we do not expect to see VM_FAULT_HWPOISON in\ndo_exception().\n\nHowever, since commit af19487f00f3 (\"mm: make PTE_MARKER_SWAPIN_ERROR more\ngeneral\"), it is possible to see VM_FAULT_HWPOISON in combination with\nPTE_MARKER_POISONED, even on architectures that do not support HWPOISON\notherwise. In this case, we will end up on the BUG() in do_exception().\n\nFix this by treating VM_FAULT_HWPOISON the same as VM_FAULT_SIGBUS, similar\nto x86 when MEMORY_FAILURE is not configured. Also print unexpected fault\nflags, for easier debugging.\n\nNote that VM_FAULT_HWPOISON_LARGE is not expected, because s390 cannot\nsupport swap entries on other levels than PTE level.",
  "id": "GHSA-mm8h-h7mm-pwwr",
  "modified": "2024-08-12T15:30:48Z",
  "published": "2024-07-29T15:30:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-41021"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/73a9260b7366d2906ec011e100319359fe2277d0"
    },
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e13767ccefdc4f8aa92514b592b60f6b54882ff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3aefb871222a9880602d1a44a558177b4143e3b"
    },
    {
      "type": "WEB",
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  "schema_version": "1.4.0",
  "severity": []
}

cve-2024-41021

Vulnerability from cvelistv5

Published

2024-07-29 13:34

Modified

2024-12-19 09:10

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: 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.

References

▼	URL	Tags
	https://git.kernel.org/stable/c/73a9260b7366d2906ec011e100319359fe2277d0
	https://git.kernel.org/stable/c/9e13767ccefdc4f8aa92514b592b60f6b54882ff
	https://git.kernel.org/stable/c/a3aefb871222a9880602d1a44a558177b4143e3b
	https://git.kernel.org/stable/c/df39038cd89525d465c2c8827eb64116873f141a

Impacted products

Vendor

Product

Version

▼

Linux

Version: af19487f00f34ff8643921d7909dbb3fedc7e329
Version: af19487f00f34ff8643921d7909dbb3fedc7e329
Version: af19487f00f34ff8643921d7909dbb3fedc7e329
Version: af19487f00f34ff8643921d7909dbb3fedc7e329

Linux

Version: 6.6

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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