staging: speakup: avoid out-of-range access in synth_init()

Check that array index is in-bounds before accessing the synths[] array.

Signed-off-by: Nickolai Zeldovich <nickolai@csail.mit.edu>
Cc: stable <stable@vger.kernel.org>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/speakup/synth.c b/drivers/staging/speakup/synth.c
index df95337..b91d22b 100644 (file)
--- a/drivers/staging/speakup/synth.c
+++ b/drivers/staging/speakup/synth.c
@@ -342,7 +342,7 @@ int synth_init(char *synth_name)
 
        mutex_lock(&spk_mutex);
        /* First, check if we already have it loaded. */
-       for (i = 0; synths[i] != NULL && i < MAXSYNTHS; i++)
+       for (i = 0; i < MAXSYNTHS && synths[i] != NULL; i++)
                if (strcmp(synths[i]->name, synth_name) == 0)
                        synth = synths[i];