Subject: CVE-2023-52850: media: hantro: Check whether reset op is defined before use

From: Greg Kroah-Hartman <[email-masked]>

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

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

media: hantro: Check whether reset op is defined before use

The i.MX8MM/N/P does not define the .reset op since reset of the VPU is
done by genpd. Check whether the .reset op is defined before calling it
to avoid NULL pointer dereference.

Note that the Fixes tag is set to the commit which removed the reset op
from i.MX8M Hantro G2 implementation, this is because before this commit
all the implementations did define the .reset op.

The Linux kernel CVE team has assigned CVE-2023-52850 to this issue.

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

	Issue introduced in 5.18 with commit 6971efb70ac3 and fixed in 6.1.63 with commit 64f55cebb433
	Issue introduced in 5.18 with commit 6971efb70ac3 and fixed in 6.5.12 with commit 66b4c5f980d7
	Issue introduced in 5.18 with commit 6971efb70ac3 and fixed in 6.6.2 with commit 24c06295f283
	Issue introduced in 5.18 with commit 6971efb70ac3 and fixed in 6.7 with commit 88d4b23a629e

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-2023-52850
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/media/platform/verisilicon/hantro_drv.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/64f55cebb4339ae771e9e7f3f42bee2489e2fa00
	https://git.kernel.org/stable/c/66b4c5f980d741f3a47e4b65eeaf2797f2d59294
	https://git.kernel.org/stable/c/24c06295f28335ced3aad53dd4b0a0bae7b9b100
	https://git.kernel.org/stable/c/88d4b23a629ebd34f682f770cb6c2116c851f7b8