CVE-2022-50173 (GCVE-0-2022-50173)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:03 – Updated: 2025-06-18 11:03
VLAI?
Title
drm/msm/mdp5: Fix global state lock backoff
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/msm/mdp5: Fix global state lock backoff We need to grab the lock after the early return for !hwpipe case. Otherwise, we could have hit contention yet still returned 0. Fixes an issue that the new CONFIG_DRM_DEBUG_MODESET_LOCK stuff flagged in CI: WARNING: CPU: 0 PID: 282 at drivers/gpu/drm/drm_modeset_lock.c:296 drm_modeset_lock+0xf8/0x154 Modules linked in: CPU: 0 PID: 282 Comm: kms_cursor_lega Tainted: G W 5.19.0-rc2-15930-g875cc8bc536a #1 Hardware name: Qualcomm Technologies, Inc. DB820c (DT) pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : drm_modeset_lock+0xf8/0x154 lr : drm_atomic_get_private_obj_state+0x84/0x170 sp : ffff80000cfab6a0 x29: ffff80000cfab6a0 x28: 0000000000000000 x27: ffff000083bc4d00 x26: 0000000000000038 x25: 0000000000000000 x24: ffff80000957ca58 x23: 0000000000000000 x22: ffff000081ace080 x21: 0000000000000001 x20: ffff000081acec18 x19: ffff80000cfabb80 x18: 0000000000000038 x17: 0000000000000000 x16: 0000000000000000 x15: fffffffffffea0d0 x14: 0000000000000000 x13: 284e4f5f4e524157 x12: 5f534b434f4c5f47 x11: ffff80000a386aa8 x10: 0000000000000029 x9 : ffff80000cfab610 x8 : 0000000000000029 x7 : 0000000000000014 x6 : 0000000000000000 x5 : 0000000000000001 x4 : ffff8000081ad904 x3 : 0000000000000029 x2 : ffff0000801db4c0 x1 : ffff80000cfabb80 x0 : ffff000081aceb58 Call trace: drm_modeset_lock+0xf8/0x154 drm_atomic_get_private_obj_state+0x84/0x170 mdp5_get_global_state+0x54/0x6c mdp5_pipe_release+0x2c/0xd4 mdp5_plane_atomic_check+0x2ec/0x414 drm_atomic_helper_check_planes+0xd8/0x210 drm_atomic_helper_check+0x54/0xb0 ... ---[ end trace 0000000000000000 ]--- drm_modeset_lock attempting to lock a contended lock without backoff: drm_modeset_lock+0x148/0x154 mdp5_get_global_state+0x30/0x6c mdp5_pipe_release+0x2c/0xd4 mdp5_plane_atomic_check+0x290/0x414 drm_atomic_helper_check_planes+0xd8/0x210 drm_atomic_helper_check+0x54/0xb0 drm_atomic_check_only+0x4b0/0x8f4 drm_atomic_commit+0x68/0xe0 Patchwork: https://patchwork.freedesktop.org/patch/492701/
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 776f5c58bfe16cf322d71eeed3c5dda1eeac7e6b , < 247f2934324f9a18d18df24ea4bfcc7d4631d0ef (git)
Affected: b2aa2c4efe93e2580d6a8774b04fe2b99756a322 , < 2e34d6c8180a398de6448a93df25068bf3062042 (git)
Affected: 49dc28b4b2e28ef7564e355c91487996c1cbebd7 , < bf386c955f35a0a01bef482b6035d40ff2f6cc75 (git)
Affected: 04bef5f1ba8ea6d7c1c8f5f65e0395c62db59cb8 , < f4e3a8c7e890049e7ba2b49ad0315dae841dfa55 (git)
Affected: 33dc5aac46e0fad8f5eb193e5906ed0eb6b66ceb , < 2fdf5a54ef9376ff69149a48c5616f1141008c9f (git)
Affected: d59be579fa932c46b908f37509f319cbd4ca9a68 , < 0b07f28c23ff50a7fa5dbc3f6b3b6bd53ac9fc70 (git)
Affected: d59be579fa932c46b908f37509f319cbd4ca9a68 , < 92ef86ab513593c6329d04146e61f9a670e72fc5 (git)
Affected: 19964dfb39bda4d7716a71009488f0668ecbcf52 (git)
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    Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 4.19.256 , ≤ 4.19.* (semver)
Unaffected: 5.4.211 , ≤ 5.4.* (semver)
Unaffected: 5.10.137 , ≤ 5.10.* (semver)
Unaffected: 5.15.61 , ≤ 5.15.* (semver)
Unaffected: 5.18.18 , ≤ 5.18.* (semver)
Unaffected: 5.19.2 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/msm/disp/mdp5/mdp5_pipe.c"
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              "version": "5.10.137",
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              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.61",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.18",
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              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.2",
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            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm/mdp5: Fix global state lock backoff\n\nWe need to grab the lock after the early return for !hwpipe case.\nOtherwise, we could have hit contention yet still returned 0.\n\nFixes an issue that the new CONFIG_DRM_DEBUG_MODESET_LOCK stuff flagged\nin CI:\n\n   WARNING: CPU: 0 PID: 282 at drivers/gpu/drm/drm_modeset_lock.c:296 drm_modeset_lock+0xf8/0x154\n   Modules linked in:\n   CPU: 0 PID: 282 Comm: kms_cursor_lega Tainted: G        W         5.19.0-rc2-15930-g875cc8bc536a #1\n   Hardware name: Qualcomm Technologies, Inc. DB820c (DT)\n   pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n   pc : drm_modeset_lock+0xf8/0x154\n   lr : drm_atomic_get_private_obj_state+0x84/0x170\n   sp : ffff80000cfab6a0\n   x29: ffff80000cfab6a0 x28: 0000000000000000 x27: ffff000083bc4d00\n   x26: 0000000000000038 x25: 0000000000000000 x24: ffff80000957ca58\n   x23: 0000000000000000 x22: ffff000081ace080 x21: 0000000000000001\n   x20: ffff000081acec18 x19: ffff80000cfabb80 x18: 0000000000000038\n   x17: 0000000000000000 x16: 0000000000000000 x15: fffffffffffea0d0\n   x14: 0000000000000000 x13: 284e4f5f4e524157 x12: 5f534b434f4c5f47\n   x11: ffff80000a386aa8 x10: 0000000000000029 x9 : ffff80000cfab610\n   x8 : 0000000000000029 x7 : 0000000000000014 x6 : 0000000000000000\n   x5 : 0000000000000001 x4 : ffff8000081ad904 x3 : 0000000000000029\n   x2 : ffff0000801db4c0 x1 : ffff80000cfabb80 x0 : ffff000081aceb58\n   Call trace:\n    drm_modeset_lock+0xf8/0x154\n    drm_atomic_get_private_obj_state+0x84/0x170\n    mdp5_get_global_state+0x54/0x6c\n    mdp5_pipe_release+0x2c/0xd4\n    mdp5_plane_atomic_check+0x2ec/0x414\n    drm_atomic_helper_check_planes+0xd8/0x210\n    drm_atomic_helper_check+0x54/0xb0\n    ...\n   ---[ end trace 0000000000000000 ]---\n   drm_modeset_lock attempting to lock a contended lock without backoff:\n      drm_modeset_lock+0x148/0x154\n      mdp5_get_global_state+0x30/0x6c\n      mdp5_pipe_release+0x2c/0xd4\n      mdp5_plane_atomic_check+0x290/0x414\n      drm_atomic_helper_check_planes+0xd8/0x210\n      drm_atomic_helper_check+0x54/0xb0\n      drm_atomic_check_only+0x4b0/0x8f4\n      drm_atomic_commit+0x68/0xe0\n\nPatchwork: https://patchwork.freedesktop.org/patch/492701/"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:03:25.017Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/247f2934324f9a18d18df24ea4bfcc7d4631d0ef"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e34d6c8180a398de6448a93df25068bf3062042"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf386c955f35a0a01bef482b6035d40ff2f6cc75"
        },
        {
          "url": "https://git.kernel.org/stable/c/f4e3a8c7e890049e7ba2b49ad0315dae841dfa55"
        },
        {
          "url": "https://git.kernel.org/stable/c/2fdf5a54ef9376ff69149a48c5616f1141008c9f"
        },
        {
          "url": "https://git.kernel.org/stable/c/0b07f28c23ff50a7fa5dbc3f6b3b6bd53ac9fc70"
        },
        {
          "url": "https://git.kernel.org/stable/c/92ef86ab513593c6329d04146e61f9a670e72fc5"
        }
      ],
      "title": "drm/msm/mdp5: Fix global state lock backoff",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50173",
    "datePublished": "2025-06-18T11:03:25.017Z",
    "dateReserved": "2025-06-18T10:57:27.427Z",
    "dateUpdated": "2025-06-18T11:03:25.017Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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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.



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