CVE - CVE-2024-49985

CVE-ID
CVE-2024-49985	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/048bbbdbf85e5e00258dfb12f5e368f908801d7b URL:https://git.kernel.org/stable/c/048bbbdbf85e5e00258dfb12f5e368f908801d7b MISC:https://git.kernel.org/stable/c/1883cad2cc629ded4a3556c0bbb8b42533ad8764 URL:https://git.kernel.org/stable/c/1883cad2cc629ded4a3556c0bbb8b42533ad8764 MISC:https://git.kernel.org/stable/c/22a1f8a5b56ba93d3e8b7a1dafa24e01c8bb48ba URL:https://git.kernel.org/stable/c/22a1f8a5b56ba93d3e8b7a1dafa24e01c8bb48ba MISC:https://git.kernel.org/stable/c/894cd5f5fd9061983445bbd1fa3d81be43095344 URL:https://git.kernel.org/stable/c/894cd5f5fd9061983445bbd1fa3d81be43095344 MISC:https://git.kernel.org/stable/c/9b8bc33ad64192f54142396470cc34ce539a8940 URL:https://git.kernel.org/stable/c/9b8bc33ad64192f54142396470cc34ce539a8940 MISC:https://git.kernel.org/stable/c/c2024b1a583ab9176c797ea1e5f57baf8d5e2682 URL:https://git.kernel.org/stable/c/c2024b1a583ab9176c797ea1e5f57baf8d5e2682 MISC:https://git.kernel.org/stable/c/d6f1250a4d5773f447740b9fe37b8692105796d4 URL:https://git.kernel.org/stable/c/d6f1250a4d5773f447740b9fe37b8692105796d4 MISC:https://git.kernel.org/stable/c/fac3c9f7784e8184c0338e9f0877b81e55d3ef1c URL:https://git.kernel.org/stable/c/fac3c9f7784e8184c0338e9f0877b81e55d3ef1c
Assigning CNA
kernel.org
Date Record Created
20241021	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241021)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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