[PATCH 0/4] ASoC: Validate written enum values in custom controls

[HyeongJun An]

Some custom ASoC kcontrol put() handlers use the written enum value
(ucontrol->value.enumerated.item[0]) to index a table or compute a bit
shift before validating that the value is within the control's enum range.
An out-of-range value written from userspace is therefore consumed before
it is rejected.

This is the same class addressed for the Meson codecs in commit
1e001206804b ("ASoC: meson: g12a-tohdmitx: Validate written enum values")
and commit 3150b70e944e ("ASoC: meson: g12a-toacodec: Validate written
enum values").

Fix four more instances:
 - hdac_hdmi reads e->texts[item] before validation.
 - aiu converts the item before validating it.
 - fsl_audmix converts the item and uses the result before validation.
 - tegra210_ahub reads e->values[item] before validation.

HyeongJun An (4):
  ASoC: codecs: hdac_hdmi: Validate written enum value
  ASoC: meson: aiu: Validate written enum values
  ASoC: fsl: fsl_audmix: Validate written enum values
  ASoC: tegra: tegra210_ahub: Validate written enum value

 sound/soc/codecs/hdac_hdmi.c      | 4 +++-
 sound/soc/fsl/fsl_audmix.c        | 6 ++++++
 sound/soc/meson/aiu-acodec-ctrl.c | 3 +++
 sound/soc/meson/aiu-codec-ctrl.c  | 3 +++
 sound/soc/tegra/tegra210_ahub.c   | 4 +++-
 5 files changed, 18 insertions(+), 2 deletions(-)

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2.43.0