From c33402b056de61104b6146dedbe138ca8d7ec62b Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 24 Jan 2022 15:32:52 +0000 Subject: ASoC: ops: Reject out of bounds values in snd_soc_put_volsw_sx() commit 4f1e50d6a9cf9c1b8c859d449b5031cacfa8404e 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 Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20220124153253.3548853-3-broonie@kernel.org Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- sound/soc/soc-ops.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'sound/soc/soc-ops.c') diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c index ee1c87904d5b..3980b1727c49 100644 --- a/sound/soc/soc-ops.c +++ b/sound/soc/soc-ops.c @@ -436,8 +436,15 @@ int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol, int err = 0; unsigned int val, val_mask, val2 = 0; + val = ucontrol->value.integer.value[0]; + if (mc->platform_max && val > mc->platform_max) + return -EINVAL; + if (val > max - min) + return -EINVAL; + if (val < 0) + return -EINVAL; val_mask = mask << shift; - val = (ucontrol->value.integer.value[0] + min) & mask; + val = (val + min) & mask; val = val << shift; err = snd_soc_component_update_bits(component, reg, val_mask, val); -- cgit v1.2.3