ALSA: control: Warn if too long string is passed to snd_ctl_enum_info()

This allows us to catch the bugs in drivers easily.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/sound/core/control.c b/sound/core/control.c
index b9611344ff9e..f95df84437e1 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -1747,6 +1747,9 @@ int snd_ctl_enum_info(struct snd_ctl_elem_info *info, unsigned int channels,
         info->value.enumerated.items = items;
         if (info->value.enumerated.item >= items)
                 info->value.enumerated.item = items - 1;
+        WARN(strlen(names[info->value.enumerated.item]) >= sizeof(info->value.enumerated.name),
+             "ALSA: too long item name '%s'\n",
+             names[info->value.enumerated.item]);
         strlcpy(info->value.enumerated.name,
                 names[info->value.enumerated.item],
                 sizeof(info->value.enumerated.name));