Vulnerability CVE-2024-36887


Published: 2024-05-30

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

e1000e: change usleep_range to udelay in PHY mdic access

This is a partial revert of commit 6dbdd4de0362 ("e1000e: Workaround
for sporadic MDI error on Meteor Lake systems"). The referenced commit
used usleep_range inside the PHY access routines, which are sometimes
called from an atomic context. This can lead to a kernel panic in some
scenarios, such as cable disconnection and reconnection on vPro systems.

Solve this by changing the usleep_range calls back to udelay.

 References:
https://git.kernel.org/stable/c/f8a139656c95db893a543159873c57a470d7376d
https://git.kernel.org/stable/c/950d5226cd6bb83ba720961a8d4d5cf79e6afd57
https://git.kernel.org/stable/c/387f295cb2150ed164905b648d76dfcbd3621778

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