So far the vmaster code has been tolerant about the input values and accepts any values by correcting internally. But now our own selftest starts complaining about this behavior, so let's be picky and change the behavior to return -EINVAL for invalid input values instead.
Reported-by: Paul Menzel pmenzel@molgen.mpg.de Closes: https://lore.kernel.org/r/1d44be36-9bb9-4d82-8953-5ae2a4f09405@molgen.mpg.de Reviewed-by: Jaroslav Kysela perex@perex.cz Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/core/vmaster.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/sound/core/vmaster.c b/sound/core/vmaster.c index 04a57f7be6ea..c657659b236c 100644 --- a/sound/core/vmaster.c +++ b/sound/core/vmaster.c @@ -198,6 +198,12 @@ static int follower_put(struct snd_kcontrol *kcontrol, err = follower_init(follower); if (err < 0) return err; + for (ch = 0; ch < follower->info.count; ch++) { + if (ucontrol->value.integer.value[ch] < follower->info.min_val || + ucontrol->value.integer.value[ch] > follower->info.max_val) + return -EINVAL; + } + for (ch = 0; ch < follower->info.count; ch++) { if (follower->vals[ch] != ucontrol->value.integer.value[ch]) { changed = 1; @@ -365,6 +371,8 @@ static int master_put(struct snd_kcontrol *kcontrol, new_val = ucontrol->value.integer.value[0]; if (new_val == old_val) return 0; + if (new_val < master->info.min_val || new_val > master->info.max_val) + return -EINVAL;
err = sync_followers(master, old_val, new_val); if (err < 0)