linux-cve-announce - CVE-2024-53126: vdpa: solidrun: Fix UB bug with devres

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Message-ID: <2024120448-CVE-2024-53126-0282@gregkh>
Date: Wed,  4 Dec 2024 15:20:49 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-53126: vdpa: solidrun: Fix UB bug with devres

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

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

vdpa: solidrun: Fix UB bug with devres

In psnet_open_pf_bar() and snet_open_vf_bar() a string later passed to
pcim_iomap_regions() is placed on the stack. Neither
pcim_iomap_regions() nor the functions it calls copy that string.

Should the string later ever be used, this, consequently, causes
undefined behavior since the stack frame will by then have disappeared.

Fix the bug by allocating the strings on the heap through
devm_kasprintf().

The Linux kernel CVE team has assigned CVE-2024-53126 to this issue.


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

	Issue introduced in 6.3 with commit 51a8f9d7f587 and fixed in 6.6.63 with commit d372dd09cfbf
	Issue introduced in 6.3 with commit 51a8f9d7f587 and fixed in 6.11.10 with commit 5bb287da2d2d
	Issue introduced in 6.3 with commit 51a8f9d7f587 and fixed in 6.12 with commit 0b364cf53b20

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-2024-53126
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/vdpa/solidrun/snet_main.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/d372dd09cfbf1324f54cbffd81fcaf6cdf3e608e
	https://git.kernel.org/stable/c/5bb287da2d2d5bb8f7376e223b02edb16998982e
	https://git.kernel.org/stable/c/0b364cf53b20204e92bac7c6ebd1ee7d3ec62931