linux-cve-announce - CVE-2025-37764: drm/imagination: fix firmware memory leaks

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Message-ID: <2025050111-CVE-2025-37764-d81b@gregkh>
Date: Thu,  1 May 2025 15:07:12 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-37764: drm/imagination: fix firmware memory leaks

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

drm/imagination: fix firmware memory leaks

Free the memory used to hold the results of firmware image processing
when the module is unloaded.

Fix the related issue of the same memory being leaked if processing
of the firmware image fails during module load.

Ensure all firmware GEM objects are destroyed if firmware image
processing fails.

Fixes memory leaks on powervr module unload detected by Kmemleak:

unreferenced object 0xffff000042e20000 (size 94208):
  comm "modprobe", pid 470, jiffies 4295277154
  hex dump (first 32 bytes):
    02 ae 7f ed bf 45 84 00 3c 5b 1f ed 9f 45 45 05  .....E..<[...EE.
    d5 4f 5d 14 6c 00 3d 23 30 d0 3a 4a 66 0e 48 c8  .O].l.=#0.:Jf.H.
  backtrace (crc dd329dec):
    kmemleak_alloc+0x30/0x40
    ___kmalloc_large_node+0x140/0x188
    __kmalloc_large_node_noprof+0x2c/0x13c
    __kmalloc_noprof+0x48/0x4c0
    pvr_fw_init+0xaa4/0x1f50 [powervr]

unreferenced object 0xffff000042d20000 (size 20480):
  comm "modprobe", pid 470, jiffies 4295277154
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 09 00 00 00 0b 00 00 00  ................
    00 00 00 00 00 00 00 00 07 00 00 00 08 00 00 00  ................
  backtrace (crc 395b02e3):
    kmemleak_alloc+0x30/0x40
    ___kmalloc_large_node+0x140/0x188
    __kmalloc_large_node_noprof+0x2c/0x13c
    __kmalloc_noprof+0x48/0x4c0
    pvr_fw_init+0xb0c/0x1f50 [powervr]

The Linux kernel CVE team has assigned CVE-2025-37764 to this issue.


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

	Issue introduced in 6.8 with commit cc1aeedb98ad347c06ff59e991b2f94dfb4c565d and fixed in 6.12.25 with commit 490c30fd554597e78f66650044877e7defb5f83c
	Issue introduced in 6.8 with commit cc1aeedb98ad347c06ff59e991b2f94dfb4c565d and fixed in 6.14.4 with commit 891c12ba855ccb34c06a2e5da75c644683087036
	Issue introduced in 6.8 with commit cc1aeedb98ad347c06ff59e991b2f94dfb4c565d and fixed in 6.15-rc2 with commit a5b230e7f3a55bd8bd8d012eec75a4b7baa671d5

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-2025-37764
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/imagination/pvr_fw.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/490c30fd554597e78f66650044877e7defb5f83c
	https://git.kernel.org/stable/c/891c12ba855ccb34c06a2e5da75c644683087036
	https://git.kernel.org/stable/c/a5b230e7f3a55bd8bd8d012eec75a4b7baa671d5