CVE-2022-49424 (GCVE-0-2022-49424)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:12 – Updated: 2025-05-04 12:44
VLAI?
Title
iommu/mediatek: Fix NULL pointer dereference when printing dev_name
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/mediatek: Fix NULL pointer dereference when printing dev_name When larbdev is NULL (in the case I hit, the node is incorrectly set iommus = <&iommu NUM>), it will cause device_link_add() fail and kernel crashes when we try to print dev_name(larbdev). Let's fail the probe if a larbdev is NULL to avoid invalid inputs from dts. It should work for normal correct setting and avoid the crash caused by my incorrect setting. Error log: [ 18.189042][ T301] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000050 ... [ 18.344519][ T301] pstate: a0400005 (NzCv daif +PAN -UAO) [ 18.345213][ T301] pc : mtk_iommu_probe_device+0xf8/0x118 [mtk_iommu] [ 18.346050][ T301] lr : mtk_iommu_probe_device+0xd0/0x118 [mtk_iommu] [ 18.346884][ T301] sp : ffffffc00a5635e0 [ 18.347392][ T301] x29: ffffffc00a5635e0 x28: ffffffd44a46c1d8 [ 18.348156][ T301] x27: ffffff80c39a8000 x26: ffffffd44a80cc38 [ 18.348917][ T301] x25: 0000000000000000 x24: ffffffd44a80cc38 [ 18.349677][ T301] x23: ffffffd44e4da4c6 x22: ffffffd44a80cc38 [ 18.350438][ T301] x21: ffffff80cecd1880 x20: 0000000000000000 [ 18.351198][ T301] x19: ffffff80c439f010 x18: ffffffc00a50d0c0 [ 18.351959][ T301] x17: ffffffffffffffff x16: 0000000000000004 [ 18.352719][ T301] x15: 0000000000000004 x14: ffffffd44eb5d420 [ 18.353480][ T301] x13: 0000000000000ad2 x12: 0000000000000003 [ 18.354241][ T301] x11: 00000000fffffad2 x10: c0000000fffffad2 [ 18.355003][ T301] x9 : a0d288d8d7142d00 x8 : a0d288d8d7142d00 [ 18.355763][ T301] x7 : ffffffd44c2bc640 x6 : 0000000000000000 [ 18.356524][ T301] x5 : 0000000000000080 x4 : 0000000000000001 [ 18.357284][ T301] x3 : 0000000000000000 x2 : 0000000000000005 [ 18.358045][ T301] x1 : 0000000000000000 x0 : 0000000000000000 [ 18.360208][ T301] Hardware name: MT6873 (DT) [ 18.360771][ T301] Call trace: [ 18.361168][ T301] dump_backtrace+0xf8/0x1f0 [ 18.361737][ T301] dump_stack_lvl+0xa8/0x11c [ 18.362305][ T301] dump_stack+0x1c/0x2c [ 18.362816][ T301] mrdump_common_die+0x184/0x40c [mrdump] [ 18.363575][ T301] ipanic_die+0x24/0x38 [mrdump] [ 18.364230][ T301] atomic_notifier_call_chain+0x128/0x2b8 [ 18.364937][ T301] die+0x16c/0x568 [ 18.365394][ T301] __do_kernel_fault+0x1e8/0x214 [ 18.365402][ T301] do_page_fault+0xb8/0x678 [ 18.366934][ T301] do_translation_fault+0x48/0x64 [ 18.368645][ T301] do_mem_abort+0x68/0x148 [ 18.368652][ T301] el1_abort+0x40/0x64 [ 18.368660][ T301] el1h_64_sync_handler+0x54/0x88 [ 18.368668][ T301] el1h_64_sync+0x68/0x6c [ 18.368673][ T301] mtk_iommu_probe_device+0xf8/0x118 [mtk_iommu] ...
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 77fbe028d5a3f7fc6060c4454ead9510533acd1e , < c3c2734e28d7fac50228c4d2b8896e8695adf304 (git)
Affected: 18ea450ed1b60c1bb336f5efe874f61909ce7bec , < e9c63c0f73a1bbfd02624f5eae7e881df8b6830f (git)
Affected: 635319a4a7444ca97124d781cd96deb277ff4d40 , < 8837c2682b9b2eed83e6212bcf79850c593a6fee (git)
Affected: 635319a4a7444ca97124d781cd96deb277ff4d40 , < de78657e16f41417da9332f09c2d67d100096939 (git)
Affected: b7bf68272b6ae7c469854e2e054db1db1d158999 (git)
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    Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 5.15.46 , ≤ 5.15.* (semver)
Unaffected: 5.17.14 , ≤ 5.17.* (semver)
Unaffected: 5.18.3 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/mtk_iommu.c",
            "drivers/iommu/mtk_iommu_v1.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c3c2734e28d7fac50228c4d2b8896e8695adf304",
              "status": "affected",
              "version": "77fbe028d5a3f7fc6060c4454ead9510533acd1e",
              "versionType": "git"
            },
            {
              "lessThan": "e9c63c0f73a1bbfd02624f5eae7e881df8b6830f",
              "status": "affected",
              "version": "18ea450ed1b60c1bb336f5efe874f61909ce7bec",
              "versionType": "git"
            },
            {
              "lessThan": "8837c2682b9b2eed83e6212bcf79850c593a6fee",
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              "version": "635319a4a7444ca97124d781cd96deb277ff4d40",
              "versionType": "git"
            },
            {
              "lessThan": "de78657e16f41417da9332f09c2d67d100096939",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b7bf68272b6ae7c469854e2e054db1db1d158999",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/mtk_iommu.c",
            "drivers/iommu/mtk_iommu_v1.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.46",
                  "versionStartIncluding": "5.15.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.14",
                  "versionStartIncluding": "5.17.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.3",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.16.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/mediatek: Fix NULL pointer dereference when printing dev_name\n\nWhen larbdev is NULL (in the case I hit, the node is incorrectly set\niommus = \u003c\u0026iommu NUM\u003e), it will cause device_link_add() fail and\nkernel crashes when we try to print dev_name(larbdev).\n\nLet\u0027s fail the probe if a larbdev is NULL to avoid invalid inputs from\ndts.\n\nIt should work for normal correct setting and avoid the crash caused\nby my incorrect setting.\n\nError log:\n[   18.189042][  T301] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000050\n...\n[   18.344519][  T301] pstate: a0400005 (NzCv daif +PAN -UAO)\n[   18.345213][  T301] pc : mtk_iommu_probe_device+0xf8/0x118 [mtk_iommu]\n[   18.346050][  T301] lr : mtk_iommu_probe_device+0xd0/0x118 [mtk_iommu]\n[   18.346884][  T301] sp : ffffffc00a5635e0\n[   18.347392][  T301] x29: ffffffc00a5635e0 x28: ffffffd44a46c1d8\n[   18.348156][  T301] x27: ffffff80c39a8000 x26: ffffffd44a80cc38\n[   18.348917][  T301] x25: 0000000000000000 x24: ffffffd44a80cc38\n[   18.349677][  T301] x23: ffffffd44e4da4c6 x22: ffffffd44a80cc38\n[   18.350438][  T301] x21: ffffff80cecd1880 x20: 0000000000000000\n[   18.351198][  T301] x19: ffffff80c439f010 x18: ffffffc00a50d0c0\n[   18.351959][  T301] x17: ffffffffffffffff x16: 0000000000000004\n[   18.352719][  T301] x15: 0000000000000004 x14: ffffffd44eb5d420\n[   18.353480][  T301] x13: 0000000000000ad2 x12: 0000000000000003\n[   18.354241][  T301] x11: 00000000fffffad2 x10: c0000000fffffad2\n[   18.355003][  T301] x9 : a0d288d8d7142d00 x8 : a0d288d8d7142d00\n[   18.355763][  T301] x7 : ffffffd44c2bc640 x6 : 0000000000000000\n[   18.356524][  T301] x5 : 0000000000000080 x4 : 0000000000000001\n[   18.357284][  T301] x3 : 0000000000000000 x2 : 0000000000000005\n[   18.358045][  T301] x1 : 0000000000000000 x0 : 0000000000000000\n[   18.360208][  T301] Hardware name: MT6873 (DT)\n[   18.360771][  T301] Call trace:\n[   18.361168][  T301]  dump_backtrace+0xf8/0x1f0\n[   18.361737][  T301]  dump_stack_lvl+0xa8/0x11c\n[   18.362305][  T301]  dump_stack+0x1c/0x2c\n[   18.362816][  T301]  mrdump_common_die+0x184/0x40c [mrdump]\n[   18.363575][  T301]  ipanic_die+0x24/0x38 [mrdump]\n[   18.364230][  T301]  atomic_notifier_call_chain+0x128/0x2b8\n[   18.364937][  T301]  die+0x16c/0x568\n[   18.365394][  T301]  __do_kernel_fault+0x1e8/0x214\n[   18.365402][  T301]  do_page_fault+0xb8/0x678\n[   18.366934][  T301]  do_translation_fault+0x48/0x64\n[   18.368645][  T301]  do_mem_abort+0x68/0x148\n[   18.368652][  T301]  el1_abort+0x40/0x64\n[   18.368660][  T301]  el1h_64_sync_handler+0x54/0x88\n[   18.368668][  T301]  el1h_64_sync+0x68/0x6c\n[   18.368673][  T301]  mtk_iommu_probe_device+0xf8/0x118 [mtk_iommu]\n..."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T12:44:40.498Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c3c2734e28d7fac50228c4d2b8896e8695adf304"
        },
        {
          "url": "https://git.kernel.org/stable/c/e9c63c0f73a1bbfd02624f5eae7e881df8b6830f"
        },
        {
          "url": "https://git.kernel.org/stable/c/8837c2682b9b2eed83e6212bcf79850c593a6fee"
        },
        {
          "url": "https://git.kernel.org/stable/c/de78657e16f41417da9332f09c2d67d100096939"
        }
      ],
      "title": "iommu/mediatek: Fix NULL pointer dereference when printing dev_name",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49424",
    "datePublished": "2025-02-26T02:12:46.209Z",
    "dateReserved": "2025-02-26T02:08:31.569Z",
    "dateUpdated": "2025-05-04T12:44:40.498Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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Sightings

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.