From b0fb75ad5c8ca205396d7a493c9be5a5da802747 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Fri, 14 May 2010 16:48:28 +0200 Subject: [PATCH] ALSA: es1688: add pedantic range checks Smatch complains that if (dev == SNDRV_CARDS) we're one past the end of the array. That's unlikely to happen in real life, I suppose. Also smatch complains about "strcpy(card->shortname, pcm->name);" The "pcm->name" buffer is 80 characters and "card->shortname" is 32 characters. If you follow the call paths it turns out we never actually use more than 16 characters so it's not a problem. But anyway, let's make it easy for people auditing this in the future. Signed-off-by: Dan Carpenter Signed-off-by: Takashi Iwai --- sound/isa/es1688/es1688.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/sound/isa/es1688/es1688.c b/sound/isa/es1688/es1688.c index fdcce31..0cde813 100644 --- a/sound/isa/es1688/es1688.c +++ b/sound/isa/es1688/es1688.c @@ -149,10 +149,11 @@ static int __devinit snd_es1688_probe(struct snd_card *card, unsigned int n) if (error < 0) return error; - strcpy(card->driver, "ES1688"); - strcpy(card->shortname, pcm->name); - sprintf(card->longname, "%s at 0x%lx, irq %i, dma %i", pcm->name, - chip->port, chip->irq, chip->dma8); + strlcpy(card->driver, "ES1688", sizeof(card->driver)); + strlcpy(card->shortname, pcm->name, sizeof(card->shortname)); + snprintf(card->longname, sizeof(card->longname), + "%s at 0x%lx, irq %i, dma %i", pcm->name, chip->port, + chip->irq, chip->dma8); if (fm_port[n] == SNDRV_AUTO_PORT) fm_port[n] = port[n]; /* share the same port */ @@ -271,6 +272,8 @@ static int __devinit snd_es968_pnp_detect(struct pnp_card_link *pcard, if (enable[dev] && isapnp[dev]) break; } + if (dev == SNDRV_CARDS) + return -ENODEV; error = snd_card_create(index[dev], id[dev], THIS_MODULE, sizeof(struct snd_es1688), &card); -- 1.8.2.3