linux-kernel - [34-longterm 206/209] ALSA: caiaq - Fix possible string-buffer overflow

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Date:	Thu, 14 Apr 2011 13:56:04 -0400
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	stable@...nel.org, linux-kernel@...r.kernel.org
Cc:	stable-review@...nel.org, Takashi Iwai <tiwai@...e.de>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [34-longterm 206/209] ALSA: caiaq - Fix possible string-buffer overflow

From: Takashi Iwai <tiwai@...e.de>

  =====================================================================
  | This is a commit scheduled for the next v2.6.34 longterm release. |
  | If you see a problem with using this for longterm, please comment.|
  =====================================================================

commit eaae55dac6b64c0616046436b294e69fc5311581 upstream

Use strlcpy() to assure not to overflow the string array sizes by
too long USB device name string.

Reported-by: Rafa <rafa@...infosecurity.com>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 sound/usb/caiaq/audio.c |    2 +-
 sound/usb/caiaq/midi.c  |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/usb/caiaq/audio.c b/sound/usb/caiaq/audio.c
index 4328cad..a184e91 100644
--- a/sound/usb/caiaq/audio.c
+++ b/sound/usb/caiaq/audio.c
@@ -640,7 +640,7 @@ int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
 	}
 
 	dev->pcm->private_data = dev;
-	strcpy(dev->pcm->name, dev->product_name);
+	strlcpy(dev->pcm->name, dev->product_name, sizeof(dev->pcm->name));
 
 	memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
 	memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
diff --git a/sound/usb/caiaq/midi.c b/sound/usb/caiaq/midi.c
index 2f218c7..a1a4708 100644
--- a/sound/usb/caiaq/midi.c
+++ b/sound/usb/caiaq/midi.c
@@ -136,7 +136,7 @@ int snd_usb_caiaq_midi_init(struct snd_usb_caiaqdev *device)
 	if (ret < 0)
 		return ret;
 
-	strcpy(rmidi->name, device->product_name);
+	strlcpy(rmidi->name, device->product_name, sizeof(rmidi->name));
 
 	rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX;
 	rmidi->private_data = device;
-- 
1.7.4.4

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