CVE-2022-50173
Analyzed Analyzed - Analysis Complete
BaseFortify

Publication date: 2025-06-18

Last updated on: 2025-11-28

Assigner: kernel.org

Description
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/
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Meta Information
Published
2025-06-18
Last Modified
2025-11-28
Generated
2026-05-07
AI Q&A
2025-06-18
EPSS Evaluated
2026-05-05
NVD
Affected Vendors & Products
Showing 7 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 4.19.247 (inc) to 4.19.256 (exc)
linux linux_kernel From 5.4.198 (inc) to 5.4.211 (exc)
linux linux_kernel From 5.10.121 (inc) to 5.10.137 (exc)
linux linux_kernel From 5.15.46 (inc) to 5.15.61 (exc)
linux linux_kernel From 5.17.14 (inc) to 5.18 (exc)
linux linux_kernel From 5.18.3 (inc) to 5.18.18 (exc)
linux linux_kernel From 5.19 (inc) to 5.19.2 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-667 The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a flaw in the Linux kernel's drm/msm/mdp5 driver related to locking mechanisms. Specifically, the code failed to properly acquire a global state lock after an early return condition, which could lead to contention issues where the lock is not held correctly even though contention occurs. This was flagged by the CONFIG_DRM_DEBUG_MODESET_LOCK feature, indicating a problem with how the drm_modeset_lock function handles locking under certain conditions.


How can this vulnerability impact me? :

The vulnerability could cause contention on the drm_modeset_lock, potentially leading to race conditions or inconsistent state in the graphics subsystem of the Linux kernel. This might result in instability or unexpected behavior in graphics rendering or display management on affected devices using the msm/mdp5 driver.


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