linux-cve-announce - CVE-2024-50240: phy: qcom: qmp-usb: fix NULL-deref on runtime suspend

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Message-ID: <2024110933-CVE-2024-50240-336d@gregkh>
Date: Sat,  9 Nov 2024 11:15:48 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-50240: phy: qcom: qmp-usb: fix NULL-deref on runtime suspend

Description
===========

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

phy: qcom: qmp-usb: fix NULL-deref on runtime suspend

Commit 413db06c05e7 ("phy: qcom-qmp-usb: clean up probe initialisation")
removed most users of the platform device driver data, but mistakenly
also removed the initialisation despite the data still being used in the
runtime PM callbacks.

Restore the driver data initialisation at probe to avoid a NULL-pointer
dereference on runtime suspend.

Apparently no one uses runtime PM, which currently needs to be enabled
manually through sysfs, with this driver.

The Linux kernel CVE team has assigned CVE-2024-50240 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.2 with commit 413db06c05e7 and fixed in 6.6.60 with commit 370814e9d512
	Issue introduced in 6.2 with commit 413db06c05e7 and fixed in 6.11.7 with commit 5ebde521fbb9
	Issue introduced in 6.2 with commit 413db06c05e7 and fixed in 6.12-rc6 with commit bd9e4d4a3b12

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2024-50240
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/phy/qualcomm/phy-qcom-qmp-usb.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/370814e9d512ba289612c3780890b80bf2605046
	https://git.kernel.org/stable/c/5ebde521fbb9a813b993d4436329a3ca0eeb6574
	https://git.kernel.org/stable/c/bd9e4d4a3b127686efc60096271b0a44c3100061