linux-cve-announce - CVE-2025-38299: ASoC: mediatek: mt8195: Set ETDM1/2 IN/OUT to COMP

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Message-ID: <2025071013-CVE-2025-38299-c973@gregkh>
Date: Thu, 10 Jul 2025 09:42:40 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38299: ASoC: mediatek: mt8195: Set ETDM1/2 IN/OUT to COMP_DUMMY()

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

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

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

ASoC: mediatek: mt8195: Set ETDM1/2 IN/OUT to COMP_DUMMY()

ETDM2_IN_BE and ETDM1_OUT_BE are defined as COMP_EMPTY(),
in the case the codec dai_name will be null.

Avoid a crash if the device tree is not assigning a codec
to these links.

[    1.179936] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[    1.181065] Mem abort info:
[    1.181420]   ESR = 0x0000000096000004
[    1.181892]   EC = 0x25: DABT (current EL), IL = 32 bits
[    1.182576]   SET = 0, FnV = 0
[    1.182964]   EA = 0, S1PTW = 0
[    1.183367]   FSC = 0x04: level 0 translation fault
[    1.183983] Data abort info:
[    1.184406]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
[    1.185097]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
[    1.185766]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[    1.186439] [0000000000000000] user address but active_mm is swapper
[    1.187239] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
[    1.188029] Modules linked in:
[    1.188420] CPU: 7 UID: 0 PID: 70 Comm: kworker/u32:1 Not tainted 6.14.0-rc4-next-20250226+ #85
[    1.189515] Hardware name: Radxa NIO 12L (DT)
[    1.190065] Workqueue: events_unbound deferred_probe_work_func
[    1.190808] pstate: 40400009 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[    1.191683] pc : __pi_strcmp+0x24/0x140
[    1.192170] lr : mt8195_mt6359_soc_card_probe+0x224/0x7b0
[    1.192854] sp : ffff800083473970
[    1.193271] x29: ffff800083473a10 x28: 0000000000001008 x27: 0000000000000002
[    1.194168] x26: ffff800082408960 x25: ffff800082417db0 x24: ffff800082417d88
[    1.195065] x23: 000000000000001e x22: ffff800082dbf480 x21: ffff800082dc07b8
[    1.195961] x20: 0000000000000000 x19: 0000000000000013 x18: 00000000ffffffff
[    1.196858] x17: 000000040044ffff x16: 005000f2b5503510 x15: 0000000000000006
[    1.197755] x14: ffff800082407af0 x13: 6e6f69737265766e x12: 692d6b636f6c6374
[    1.198651] x11: 0000000000000002 x10: ffff80008240b920 x9 : 0000000000000018
[    1.199547] x8 : 0101010101010101 x7 : 0000000000000000 x6 : 0000000000000000
[    1.200443] x5 : 0000000000000000 x4 : 8080808080000000 x3 : 303933383978616d
[    1.201339] x2 : 0000000000000000 x1 : ffff80008240b920 x0 : 0000000000000000
[    1.202236] Call trace:
[    1.202545]  __pi_strcmp+0x24/0x140 (P)
[    1.203029]  mtk_soundcard_common_probe+0x3bc/0x5b8
[    1.203644]  platform_probe+0x70/0xe8
[    1.204106]  really_probe+0xc8/0x3a0
[    1.204556]  __driver_probe_device+0x84/0x160
[    1.205104]  driver_probe_device+0x44/0x130
[    1.205630]  __device_attach_driver+0xc4/0x170
[    1.206189]  bus_for_each_drv+0x8c/0xf8
[    1.206672]  __device_attach+0xa8/0x1c8
[    1.207155]  device_initial_probe+0x1c/0x30
[    1.207681]  bus_probe_device+0xb0/0xc0
[    1.208165]  deferred_probe_work_func+0xa4/0x100
[    1.208747]  process_one_work+0x158/0x3e0
[    1.209254]  worker_thread+0x2c4/0x3e8
[    1.209727]  kthread+0x134/0x1f0
[    1.210136]  ret_from_fork+0x10/0x20
[    1.210589] Code: 54000401 b50002c6 d503201f f86a6803 (f8408402)
[    1.211355] ---[ end trace 0000000000000000 ]---

The Linux kernel CVE team has assigned CVE-2025-38299 to this issue.


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

	Issue introduced in 6.8 with commit e70b8dd26711704b1ff1f1b4eb3d048ba69e29da and fixed in 6.12.34 with commit 87dbfe2b392df9621f6e522e5fa6fb8849ca92ab
	Issue introduced in 6.8 with commit e70b8dd26711704b1ff1f1b4eb3d048ba69e29da and fixed in 6.15.3 with commit 183e7329d41d7a8e298f48b6b0eb81102a8654de
	Issue introduced in 6.8 with commit e70b8dd26711704b1ff1f1b4eb3d048ba69e29da and fixed in 6.16-rc1 with commit 7af317f7faaab09d5a78f24605057d11f5955115

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-2025-38299
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:
	sound/soc/mediatek/mt8195/mt8195-mt6359.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/87dbfe2b392df9621f6e522e5fa6fb8849ca92ab
	https://git.kernel.org/stable/c/183e7329d41d7a8e298f48b6b0eb81102a8654de
	https://git.kernel.org/stable/c/7af317f7faaab09d5a78f24605057d11f5955115