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CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-49985

i2c: stm32f7: Do not prepare/unprepare clock during runtime suspend/resume

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: i2c: stm32f7: Do not prepare/unprepare clock during runtime suspend/resume In case there is any sort of clock controller attached to this I2C bus controller, for example Versaclock or even an AIC32x4 I2C codec, then an I2C transfer triggered from the clock controller clk_ops .prepare callback may trigger a deadlock on drivers/clk/clk.c prepare_lock mutex. This is because the clock controller first grabs the prepare_lock mutex and then performs the prepare operation, including its I2C access. The I2C access resumes this I2C bus controller via .runtime_resume callback, which calls clk_prepare_enable(), which attempts to grab the prepare_lock mutex again and deadlocks. Since the clock are already prepared since probe() and unprepared in remove(), use simple clk_enable()/clk_disable() calls to enable and disable the clock on runtime suspend and resume, to avoid hitting the prepare_lock mutex.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 4e7bca6fc07bf9526d797b9787dcb21e40cd10cf to < d6f1250a4d5773f447740b9fe37b8692105796d4affected
  • 4e7bca6fc07bf9526d797b9787dcb21e40cd10cf to < 9b8bc33ad64192f54142396470cc34ce539a8940affected
  • 4e7bca6fc07bf9526d797b9787dcb21e40cd10cf to < 1883cad2cc629ded4a3556c0bbb8b42533ad8764affected
  • 4e7bca6fc07bf9526d797b9787dcb21e40cd10cf to < c2024b1a583ab9176c797ea1e5f57baf8d5e2682affected
  • 4e7bca6fc07bf9526d797b9787dcb21e40cd10cf to < 22a1f8a5b56ba93d3e8b7a1dafa24e01c8bb48baaffected
  • 4e7bca6fc07bf9526d797b9787dcb21e40cd10cf to < fac3c9f7784e8184c0338e9f0877b81e55d3ef1caffected
  • 4e7bca6fc07bf9526d797b9787dcb21e40cd10cf to < 894cd5f5fd9061983445bbd1fa3d81be43095344affected
  • 4e7bca6fc07bf9526d797b9787dcb21e40cd10cf to < 048bbbdbf85e5e00258dfb12f5e368f908801d7baffected

Linux Linux

Default version status: affected

  • 5.0affected
  • 0 to < 5.0unaffected
  • 5.4.285 to ≤ 5.4.*unaffected
  • 5.10.227 to ≤ 5.10.*unaffected
  • 5.15.168 to ≤ 5.15.*unaffected
  • 6.1.113 to ≤ 6.1.*unaffected
  • 6.6.55 to ≤ 6.6.*unaffected
  • 6.10.14 to ≤ 6.10.*unaffected
  • 6.11.3 to ≤ 6.11.*unaffected
  • 6.12 to ≤ *unaffected

References