Filling the rawmidi name and substream name can be truncated, and this leads to spurious compiler warnings due to -Wformat-truncation. Although the truncation is the expected behavior, it'd be better to truncate the string within "(...)"
This patch puts the precision specifies to each %s for fitting the words within the size-limited strings.
Fixes: 5f11dd938fe7 ("ALSA: usb-audio: Attach legacy rawmidi after probing all UMP EPs") Reported-by: kernel test robot lkp@intel.com Closes: https://lore.kernel.org/oe-kbuild-all/202308251844.1FuQYsql-lkp@intel.com/ Signed-off-by: Takashi Iwai tiwai@suse.de --- v1->v2: change the precision to fit better
sound/core/ump.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/core/ump.c b/sound/core/ump.c index cd192bec227a..3bef1944e955 100644 --- a/sound/core/ump.c +++ b/sound/core/ump.c @@ -1157,7 +1157,7 @@ static void fill_substream_names(struct snd_ump_endpoint *ump, struct snd_rawmidi_substream *s;
list_for_each_entry(s, &rmidi->streams[dir].substreams, list) - snprintf(s->name, sizeof(s->name), "Group %d (%s)", + snprintf(s->name, sizeof(s->name), "Group %d (%.16s)", ump->legacy_mapping[s->number] + 1, ump->info.name); }
@@ -1191,7 +1191,7 @@ int snd_ump_attach_legacy_rawmidi(struct snd_ump_endpoint *ump, if (output) snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_ump_legacy_output_ops); - snprintf(rmidi->name, sizeof(rmidi->name), "%s (MIDI 1.0)", + snprintf(rmidi->name, sizeof(rmidi->name), "%.68s (MIDI 1.0)", ump->info.name); rmidi->info_flags = ump->core.info_flags & ~SNDRV_RAWMIDI_INFO_UMP; rmidi->ops = &snd_ump_legacy_ops;