CVE-2022-49506 (GCVE-0-2022-49506)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:13 – Updated: 2025-05-04 08:39
VLAI?
Title
drm/mediatek: Add vblank register/unregister callback functions
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Add vblank register/unregister callback functions We encountered a kernel panic issue that callback data will be NULL when it's using in ovl irq handler. There is a timing issue between mtk_disp_ovl_irq_handler() and mtk_ovl_disable_vblank(). To resolve this issue, we use the flow to register/unregister vblank cb: - Register callback function and callback data when crtc creates. - Unregister callback function and callback data when crtc destroies. With this solution, we can assure callback data will not be NULL when vblank is disable.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9b0704988b151824a51133dc4c921f4273c5d839 , < 8a2dbdeccef6de47565638abdf3c25f41cdffc37 (git)
Affected: 9b0704988b151824a51133dc4c921f4273c5d839 , < 8a265d9838bc3c63579002d55c2b2c655c4f8f26 (git)
Affected: 9b0704988b151824a51133dc4c921f4273c5d839 , < 3a4027b5971fe2a94e32754f007d9d3c12c68ad1 (git)
Affected: 9b0704988b151824a51133dc4c921f4273c5d839 , < b74d921b900b6ce38c6247c0a1c86be9f3746493 (git)
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    Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.15.54 , ≤ 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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{
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          "programFiles": [
            "drivers/gpu/drm/mediatek/mtk_disp_drv.h",
            "drivers/gpu/drm/mediatek/mtk_disp_ovl.c",
            "drivers/gpu/drm/mediatek/mtk_disp_rdma.c",
            "drivers/gpu/drm/mediatek/mtk_drm_crtc.c",
            "drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c",
            "drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h"
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            "drivers/gpu/drm/mediatek/mtk_disp_rdma.c",
            "drivers/gpu/drm/mediatek/mtk_drm_crtc.c",
            "drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c",
            "drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: Add vblank register/unregister callback functions\n\nWe encountered a kernel panic issue that callback data will be NULL when\nit\u0027s using in ovl irq handler. There is a timing issue between\nmtk_disp_ovl_irq_handler() and mtk_ovl_disable_vblank().\n\nTo resolve this issue, we use the flow to register/unregister vblank cb:\n- Register callback function and callback data when crtc creates.\n- Unregister callback function and callback data when crtc destroies.\n\nWith this solution, we can assure callback data will not be NULL when\nvblank is disable."
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      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:39:24.277Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/b74d921b900b6ce38c6247c0a1c86be9f3746493"
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      "title": "drm/mediatek: Add vblank register/unregister callback functions",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49506",
    "datePublished": "2025-02-26T02:13:38.168Z",
    "dateReserved": "2025-02-26T02:08:31.586Z",
    "dateUpdated": "2025-05-04T08:39:24.277Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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