CVE-2024-50266

Summary

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

clk: qcom: videocc-sm8350: use HW_CTRL_TRIGGER for vcodec GDSCs

A recent change in the venus driver results in a stuck clock on the Lenovo ThinkPad X13s, for example, when streaming video in firefox:

video_cc_mvs0_clk status stuck at 'off'
WARNING: CPU: 6 PID: 2885 at drivers/clk/qcom/clk-branch.c:87 clk_branch_wait+0x144/0x15c
...
Call trace:
 clk_branch_wait+0x144/0x15c
 clk_branch2_enable+0x30/0x40
 clk_core_enable+0xd8/0x29c
 clk_enable+0x2c/0x4c
 vcodec_clks_enable.isra.0+0x94/0xd8 [venus_core]
 coreid_power_v4+0x464/0x628 [venus_core]
 vdec_start_streaming+0xc4/0x510 [venus_dec]
 vb2_start_streaming+0x6c/0x180 [videobuf2_common]
 vb2_core_streamon+0x120/0x1dc [videobuf2_common]
 vb2_streamon+0x1c/0x6c [videobuf2_v4l2]
 v4l2_m2m_ioctl_streamon+0x30/0x80 [v4l2_mem2mem]
 v4l_streamon+0x24/0x30 [videodev]

using the out-of-tree sm8350/sc8280xp venus support. [1]

Update also the sm8350/sc8280xp GDSC definitions so that the hw control mode can be changed at runtime as the venus driver now requires.

Affected Software

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://git.kernel.org/stable/c/d055f6f2bdfb8b9c9bc071f748c16bd3afb2db0f
• https://git.kernel.org/stable/c/f903663a8dcd6e1656e52856afbf706cc14cbe6d

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