U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Vulnerability Change Records for CVE-2024-49985

Change History

New CVE Received by NIST 10/21/2024 2:15:18 PM

Action Type Old Value New Value
Added 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.
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/048bbbdbf85e5e00258dfb12f5e368f908801d7b [No types assigned]
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/1883cad2cc629ded4a3556c0bbb8b42533ad8764 [No types assigned]
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/22a1f8a5b56ba93d3e8b7a1dafa24e01c8bb48ba [No types assigned]
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/894cd5f5fd9061983445bbd1fa3d81be43095344 [No types assigned]
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/9b8bc33ad64192f54142396470cc34ce539a8940 [No types assigned]
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/c2024b1a583ab9176c797ea1e5f57baf8d5e2682 [No types assigned]
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/fac3c9f7784e8184c0338e9f0877b81e55d3ef1c [No types assigned]