sound: oss/pas2: Fix possible access out of array

Added a fix for hardware dependence bug where a sound card failure
should not result in reading beyond array memory index.

Signed-off-by: Asim Kadav <kadav@cs.wisc.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/sound/oss/pas2_card.c b/sound/oss/pas2_card.c
index dabf8a871dcc..7004e24d209f 100644
--- a/sound/oss/pas2_card.c
+++ b/sound/oss/pas2_card.c
@@ -333,6 +333,11 @@ static void __init attach_pas_card(struct address_info *hw_config)
                 {
                         char            temp[100];
 
+                        if (pas_model < 0 ||
+                            pas_model >= ARRAY_SIZE(pas_model_names)) {
+                                printk(KERN_ERR "pas2 unrecognized model.\n");
+                                return;
+                        }
                         sprintf(temp,
                             "%s rev %d", pas_model_names[(int) pas_model],
                                     pas_read(0x2789));