CVE-2026-98743: ASoC: codecs: rt1017-sdca-sdw: fix uninitialized stream_config->type

CVE-2026-98743: ASoC: codecs: rt1017-sdca-sdw: fix uninitialized stream_config->type

[Greg Kroah-Hartman]

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

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

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

ASoC: codecs: rt1017-sdca-sdw: fix uninitialized stream_config->type

stream_config is not initialized before being passed to
sdw_stream_add_slave().  The type field may contain garbage and is
later copied to stream->type by sdw_config_stream().

Zero-initialize stream_config so type defaults to SDW_STREAM_PCM.

While at it, use snd_sdw_params_to_config() helper instead of
open-coding the same logic.

The Linux kernel CVE team has assigned CVE-2026-98743 to this issue.


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

	Issue introduced in 6.6 with commit 2b7aecd58528551e6e3da58091ff7ceb4718e6be and fixed in 6.12.113 with commit 4e337c24c0a97fcdb394f954208971de5d372066
	Issue introduced in 6.6 with commit 2b7aecd58528551e6e3da58091ff7ceb4718e6be and fixed in 6.18.56 with commit d195c8c763fdd0a7f74a34973f8946215a708f1e
	Issue introduced in 6.6 with commit 2b7aecd58528551e6e3da58091ff7ceb4718e6be and fixed in 7.2.10 with commit 7791ebf56eb4ab6b7a20252757a3029bc8068715
	Issue introduced in 6.6 with commit 2b7aecd58528551e6e3da58091ff7ceb4718e6be and fixed in 7.3-rc6 with commit 174d160884199cad97413f33fe1b56027dc0d3e1

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-2026-98743
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/codecs/rt1017-sdca-sdw.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/4e337c24c0a97fcdb394f954208971de5d372066
	https://git.kernel.org/stable/c/d195c8c763fdd0a7f74a34973f8946215a708f1e
	https://git.kernel.org/stable/c/7791ebf56eb4ab6b7a20252757a3029bc8068715
	https://git.kernel.org/stable/c/174d160884199cad97413f33fe1b56027dc0d3e1