CVE-2022-48761

usb: xhci-plat: fix crash when suspend if remote wake enable

Description

In the Linux kernel, the following vulnerability has been resolved: usb: xhci-plat: fix crash when suspend if remote wake enable Crashed at i.mx8qm platform when suspend if enable remote wakeup Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP Modules linked in: CPU: 2 PID: 244 Comm: kworker/u12:6 Not tainted 5.15.5-dirty #12 Hardware name: Freescale i.MX8QM MEK (DT) Workqueue: events_unbound async_run_entry_fn pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : xhci_disable_hub_port_wake.isra.62+0x60/0xf8 lr : xhci_disable_hub_port_wake.isra.62+0x34/0xf8 sp : ffff80001394bbf0 x29: ffff80001394bbf0 x28: 0000000000000000 x27: ffff00081193b578 x26: ffff00081193b570 x25: 0000000000000000 x24: 0000000000000000 x23: ffff00081193a29c x22: 0000000000020001 x21: 0000000000000001 x20: 0000000000000000 x19: ffff800014e90490 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000002 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000960 x9 : ffff80001394baa0 x8 : ffff0008145d1780 x7 : ffff0008f95b8e80 x6 : 000000001853b453 x5 : 0000000000000496 x4 : 0000000000000000 x3 : ffff00081193a29c x2 : 0000000000000001 x1 : 0000000000000000 x0 : ffff000814591620 Call trace: xhci_disable_hub_port_wake.isra.62+0x60/0xf8 xhci_suspend+0x58/0x510 xhci_plat_suspend+0x50/0x78 platform_pm_suspend+0x2c/0x78 dpm_run_callback.isra.25+0x50/0xe8 __device_suspend+0x108/0x3c0 The basic flow: 1. run time suspend call xhci_suspend, xhci parent devices gate the clock. 2. echo mem >/sys/power/state, system _device_suspend call xhci_suspend 3. xhci_suspend call xhci_disable_hub_port_wake, which access register, but clock already gated by run time suspend. This problem was hidden by power domain driver, which call run time resume before it. But the below commit remove it and make this issue happen. commit c1df456d0f06e ("PM: domains: Don't runtime resume devices at genpd_prepare()") This patch call run time resume before suspend to make sure clock is on before access register. Testeb-by: Abel Vesa <abel.vesa@nxp.com>

5.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.04%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/20c51a4c52208f98e27308c456a1951778f41fa5
https://git.kernel.org/stable/c/d5755832a1e47f5d8773f0776e211ecd4e02da72
https://git.kernel.org/stable/c/8b05ad29acb972850ad795fa850e814b2e758b83
https://git.kernel.org/stable/c/9df478463d9feb90dae24f183383961cf123a0ec

Frequently Asked Questions

What is the severity of CVE-2022-48761?
CVE-2022-48761 has been scored as a medium severity vulnerability.
How to fix CVE-2022-48761?
To fix CVE-2022-48761, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-48761 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-48761 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-48761?
CVE-2022-48761 affects Linux Linux, Linux Linux.
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