Vulnerability CVE-2024-46675
Published: 2024-09-13

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

usb: dwc3: core: Prevent USB core invalid event buffer address access

This commit addresses an issue where the USB core could access an
invalid event buffer address during runtime suspend, potentially causing
SMMU faults and other memory issues in Exynos platforms. The problem
arises from the following sequence.
1. In dwc3_gadget_suspend, there is a chance of a timeout when
moving the USB core to the halt state after clearing the
run/stop bit by software.
2. In dwc3_core_exit, the event buffer is cleared regardless of
the USB core's status, which may lead to an SMMU faults and
other memory issues. if the USB core tries to access the event
buffer address.

To prevent this hardware quirk on Exynos platforms, this commit ensures
that the event buffer address is not cleared by software when the USB
core is active during runtime suspend by checking its status before
clearing the buffer address.

 References:
https://git.kernel.org/stable/c/eca3f543f817da87c00d1a5697b473efb548204f
https://git.kernel.org/stable/c/d2afc2bffec77316b90d530b07695e3f534df914
https://git.kernel.org/stable/c/b72da4d89b97da71e056cc4d1429b2bc426a9c2f
https://git.kernel.org/stable/c/111277b881def3153335acfe0d1f43e6cd83ac93
https://git.kernel.org/stable/c/2189fd13c577d7881f94affc09c950a795064c4b
https://git.kernel.org/stable/c/7bb11a75dd4d3612378b90e2a4aa49bdccea28ab
https://git.kernel.org/stable/c/e23f6ad8d110bf632f7471482e10b43dc174fb72
https://git.kernel.org/stable/c/14e497183df28c006603cc67fd3797a537eef7b9
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