ALSA: emu10k1: Fix card shortname string buffer overflow

commit d02260824e2cad626fb2a9d62e27006d34b6dedc upstream.

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.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/pci/emu10k1/emu10k1.c b/sound/pci/emu10k1/emu10k1.c
index 37d0220a094cb55451cff620c5e455f83d8a894d..db7a2e5e4a14ee6d7d110206aa94d7d71002066a 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 b4458a630a7c260cce0e211bbd5ef9310a126605..ddaba4d09df7fe666cbdfd8e946538feefe0036c 100644 (file)
--- a/sound/pci/emu10k1/emu10k1_main.c
+++ b/sound/pci/emu10k1/emu10k1_main.c
@@ -1421,7 +1421,7 @@ 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,
@@ -1571,7 +1571,7 @@ 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,