ASoC: ops: Reject out of bounds values in snd_soc_put_xr_sx()

commit 4cf28e9ae6e2e11a044be1bcbcfa1b0d8675fe4d upstream.

We don't currently validate that the values being set are within the range
we advertised to userspace as being valid, do so and reject any values
that are out of range.

Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220124153253.3548853-4-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c
index 22e5ac662457fd28d1f126c54022e1da04e6b835..e1c897ad0fe5ffba665a618faf6844c9a862ac7d 100644 (file)
--- a/sound/soc/soc-ops.c
+++ b/sound/soc/soc-ops.c
@@ -915,6 +915,8 @@ int snd_soc_put_xr_sx(struct snd_kcontrol *kcontrol,
        unsigned int i, regval, regmask;
        int err;
 
+       if (val < mc->min || val > mc->max)
+               return -EINVAL;
        if (invert)
                val = max - val;
        val &= mask;