Vulnerability CVE-2024-46846
Published: 2024-09-27

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

spi: rockchip: Resolve unbalanced runtime PM / system PM handling

Commit e882575efc77 ("spi: rockchip: Suspend and resume the bus during
NOIRQ_SYSTEM_SLEEP_PM ops") stopped respecting runtime PM status and
simply disabled clocks unconditionally when suspending the system. This
causes problems when the device is already runtime suspended when we go
to sleep -- in which case we double-disable clocks and produce a
WARNing.

Switch back to pm_runtime_force_{suspend,resume}(), because that still
seems like the right thing to do, and the aforementioned commit makes no
explanation why it stopped using it.

Also, refactor some of the resume() error handling, because it's not
actually a good idea to re-disable clocks on failure.

 References:
https://git.kernel.org/stable/c/14f970a8d03d882b15b97beb83bd84ac8ba6298c
https://git.kernel.org/stable/c/d034bff62faea1a2219e0d2f3d17263265f24087
https://git.kernel.org/stable/c/0efbad8445fbba7896402500a1473450a299a08a
https://git.kernel.org/stable/c/be721b451affbecc4ba4eaac3b71cdbdcade1b1b
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