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Date: Mon, 25 Mar 2024 10:16:41 +0100
From: Greg Kroah-Hartman <>
Cc: Greg Kroah-Hartman <>
Subject: CVE-2021-47165: drm/meson: fix shutdown crash when component not probed


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

drm/meson: fix shutdown crash when component not probed

When main component is not probed, by example when the dw-hdmi module is
not loaded yet or in probe defer, the following crash appears on shutdown:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000038
pc : meson_drv_shutdown+0x24/0x50
lr : platform_drv_shutdown+0x20/0x30
Call trace:

Simply check if the priv struct has been allocated before using it.

The Linux kernel CVE team has assigned CVE-2021-47165 to this issue.

Affected and fixed versions

	Issue introduced in 4.14.226 with commit 8a5160cc8488 and fixed in 4.14.235 with commit b4298d33c1fc
	Issue introduced in 4.19.181 with commit 8fbbf2b38494 and fixed in 4.19.193 with commit e256a0eb43e1
	Issue introduced in 5.4.106 with commit d2100ef32a8c and fixed in 5.4.124 with commit 4ce2bf20b4a6
	Issue introduced in 5.10.24 with commit d4ec1ffbdaa8 and fixed in 5.10.42 with commit d66083c0d6f5
	Issue introduced in 5.12 with commit fa0c16caf3d7 and fixed in 5.12.9 with commit b4b91033a0b1
	Issue introduced in 5.12 with commit fa0c16caf3d7 and fixed in 5.13 with commit 7cfc4ea78fc1

Please see 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
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:


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:

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