ASoC: max9759: fix underflow in speaker_gain_control_put()

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commit 4c907bcd9d upstream.

Check for negative values of "priv->gain" to prevent an out of bounds
access.  The concern is that these might come from the user via:
  -> snd_ctl_elem_write_user()
    -> snd_ctl_elem_write()
      -> kctl->put()

Fixes: fa8d915172 ("ASoC: max9759: Add Amplifier Driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20220119123101.GA9509@kili
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Dan Carpenter 2022-01-19 15:31:01 +03:00 • committed by Greg Kroah-Hartman

parent 263b947aa4

commit baead410e5

1 changed files with 2 additions and 1 deletions

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sound/soc/codecs/max9759.c

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