linux-cve-announce - CVE-2024-50149: drm/xe: Don't free job in TDR

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Message-ID: <2024110744-CVE-2024-50149-8ac4@gregkh>
Date: Thu,  7 Nov 2024 10:34:49 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-50149: drm/xe: Don't free job in TDR

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

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

drm/xe: Don't free job in TDR

Freeing job in TDR is not safe as TDR can pass the run_job thread
resulting in UAF. It is only safe for free job to naturally be called by
the scheduler. Rather free job in TDR, add to pending list.

(cherry picked from commit ea2f6a77d0c40d97f4a4dc93fee4afe15d94926d)

The Linux kernel CVE team has assigned CVE-2024-50149 to this issue.


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

	Issue introduced in 6.10 with commit e275d61c5f3f and fixed in 6.11.6 with commit be8fe75e57f8
	Issue introduced in 6.10 with commit e275d61c5f3f and fixed in 6.12-rc4 with commit 82926f52d7a0

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-2024-50149
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/gpu/drm/xe/xe_guc_submit.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/be8fe75e57f8fa3f87e3b1c283cc7cd9f9b80867
	https://git.kernel.org/stable/c/82926f52d7a09c65d916c0ef8d4305fc95d68c0c