ALSA: emu10k1: Fix card shortname string buffer overflow

Some models provide too long string for the shortname that has 32bytes
including the terminator, and it results in a non-terminated string
exposed to the user-space.  This isn't too critical, though, as the
string is stopped at the succeeding longname string.

This patch fixes such entries by dropping "SB" prefix (it's enough to
fit within 32 bytes, so far).  Meanwhile, it also changes strcpy()
with strlcpy() to make sure that this kind of problem won't happen in
future, too.

Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/emu10k1/emu10k1.c b/sound/pci/emu10k1/emu10k1.c
index 37d0220..db7a2e5 100644 (file)
--- a/sound/pci/emu10k1/emu10k1.c
+++ b/sound/pci/emu10k1/emu10k1.c
@@ -183,8 +183,10 @@ static int snd_card_emu10k1_probe(struct pci_dev *pci,
        }
 #endif
  
-       strcpy(card->driver, emu->card_capabilities->driver);
-       strcpy(card->shortname, emu->card_capabilities->name);
+       strlcpy(card->driver, emu->card_capabilities->driver,
+               sizeof(card->driver));
+       strlcpy(card->shortname, emu->card_capabilities->name,
+               sizeof(card->shortname));
        snprintf(card->longname, sizeof(card->longname),
                 "%s (rev.%d, serial:0x%x) at 0x%lx, irq %i",
                 card->shortname, emu->revision, emu->serial, emu->port, emu->irq);

diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c
index 54079f5..4f8cf5e 100644 (file)
--- a/sound/pci/emu10k1/emu10k1_main.c
+++ b/sound/pci/emu10k1/emu10k1_main.c
@@ -1446,7 +1446,7 @@ static struct snd_emu_chip_details emu_chip_details[] = {
         *
         */
        {.vendor = 0x1102, .device = 0x0008, .subsystem = 0x20011102,
-        .driver = "Audigy2", .name = "SB Audigy 2 ZS Notebook [SB0530]",
+        .driver = "Audigy2", .name = "Audigy 2 ZS Notebook [SB0530]",
         .id = "Audigy2",
         .emu10k2_chip = 1,
         .ca0108_chip = 1,
@@ -1596,7 +1596,7 @@ static struct snd_emu_chip_details emu_chip_details[] = {
         .adc_1361t = 1,  /* 24 bit capture instead of 16bit */
         .ac97_chip = 1} ,
        {.vendor = 0x1102, .device = 0x0004, .subsystem = 0x10051102,
-        .driver = "Audigy2", .name = "SB Audigy 2 Platinum EX [SB0280]",
+        .driver = "Audigy2", .name = "Audigy 2 Platinum EX [SB0280]",
         .id = "Audigy2",
         .emu10k2_chip = 1,
         .ca0102_chip = 1,