ALSA: hda: Fix possible null-ptr-deref when assigning a stream

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[ Upstream commit f93dc90c2e ]

While AudioDSP drivers assign streams exclusively of HOST or LINK type,
nothing blocks a user to attempt to assign a COUPLED stream. As
supplied substream instance may be a stub, what is the case when
code-loading, such scenario ends with null-ptr-deref.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20231006102857.749143-2-cezary.rojewski@intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Cezary Rojewski 2023-10-06 12:28:55 +02:00 • committed by Greg Kroah-Hartman

parent fa7abd3c5c

commit 43b91df291

1 changed files with 4 additions and 2 deletions

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sound/hda/hdac_stream.c

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