diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2017-07-18 13:48:10 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-07-18 17:55:11 +0200 |
| commit | 5051735221ba50cb5794b9194a8ad10a13368f2f (patch) | |
| tree | 002575b0085221e8b853c89da51c8044b28cfc9e | |
| parent | 7ad210ace5c1701421a4defa9d9e830a6f2ee56b (diff) | |
ALSA: pcxhr: fix string overflow warnings
With gcc-7, we get a warning about a possible string overflow:
sound/pci/pcxhr/pcxhr.c: In function 'pcxhr_probe':
sound/pci/pcxhr/pcxhr.c:1647:28: error: ' [PCM #' directive writing 7 bytes into a region of size between 1 and 32 [-Werror=format-overflow=]
The shortname can simply be removed, and the longname can
be changed into a shorter "name" string that is used in three
places. Making it a little shorter (40 bytes) avoids the risk of
overflowing completely, but I also use snprintf() here for
extra clarity.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/pci/pcxhr/pcxhr.c | 19 | ||||
| -rw-r--r-- | sound/pci/pcxhr/pcxhr.h | 3 |
2 files changed, 11 insertions, 11 deletions
diff --git a/sound/pci/pcxhr/pcxhr.c b/sound/pci/pcxhr/pcxhr.c index bb7eee9d0c2b..fa919f52e225 100644 --- a/sound/pci/pcxhr/pcxhr.c +++ b/sound/pci/pcxhr/pcxhr.c @@ -1165,7 +1165,7 @@ int pcxhr_create_pcm(struct snd_pcxhr *chip) struct snd_pcm *pcm; char name[32]; - sprintf(name, "pcxhr %d", chip->chip_idx); + snprintf(name, sizeof(name), "pcxhr %d", chip->chip_idx); if ((err = snd_pcm_new(chip->card, name, 0, chip->nb_streams_play, chip->nb_streams_capt, &pcm)) < 0) { @@ -1252,7 +1252,7 @@ static void pcxhr_proc_info(struct snd_info_entry *entry, struct snd_pcxhr *chip = entry->private_data; struct pcxhr_mgr *mgr = chip->mgr; - snd_iprintf(buffer, "\n%s\n", mgr->longname); + snd_iprintf(buffer, "\n%s\n", mgr->name); /* stats available when embedded DSP is running */ if (mgr->dsp_loaded & (1 << PCXHR_FIRMWARE_DSP_MAIN_INDEX)) { @@ -1339,7 +1339,7 @@ static void pcxhr_proc_sync(struct snd_info_entry *entry, max_clock = PCXHR_CLOCK_TYPE_MAX; } - snd_iprintf(buffer, "\n%s\n", mgr->longname); + snd_iprintf(buffer, "\n%s\n", mgr->name); snd_iprintf(buffer, "Current Sample Clock\t: %s\n", texts[mgr->cur_clock_type]); snd_iprintf(buffer, "Current Sample Rate\t= %d\n", @@ -1597,10 +1597,9 @@ static int pcxhr_probe(struct pci_dev *pci, } mgr->irq = pci->irq; - sprintf(mgr->shortname, "Digigram %s", card_name); - sprintf(mgr->longname, "%s at 0x%lx & 0x%lx, 0x%lx irq %i", - mgr->shortname, - mgr->port[0], mgr->port[1], mgr->port[2], mgr->irq); + snprintf(mgr->name, sizeof(mgr->name), + "Digigram at 0x%lx & 0x%lx, 0x%lx irq %i", + mgr->port[0], mgr->port[1], mgr->port[2], mgr->irq); /* ISR lock */ mutex_init(&mgr->lock); @@ -1644,8 +1643,10 @@ static int pcxhr_probe(struct pci_dev *pci, } strcpy(card->driver, DRIVER_NAME); - sprintf(card->shortname, "%s [PCM #%d]", mgr->shortname, i); - sprintf(card->longname, "%s [PCM #%d]", mgr->longname, i); + snprintf(card->shortname, sizeof(card->shortname), + "Digigram [PCM #%d]", i); + snprintf(card->longname, sizeof(card->longname), + "%s [PCM #%d]", mgr->name, i); if ((err = pcxhr_create(mgr, card, i)) < 0) { snd_card_free(card); diff --git a/sound/pci/pcxhr/pcxhr.h b/sound/pci/pcxhr/pcxhr.h index 9e39e509a3ef..d799cbd37301 100644 --- a/sound/pci/pcxhr/pcxhr.h +++ b/sound/pci/pcxhr/pcxhr.h @@ -75,8 +75,7 @@ struct pcxhr_mgr { unsigned long port[3]; /* share the name */ - char shortname[32]; /* short name of this soundcard */ - char longname[96]; /* name of this soundcard */ + char name[40]; /* name of this soundcard */ struct pcxhr_rmh *prmh; |