V4L/DVB (3568b): saa7111: Prevent array overrun
Explicitely state the number of registers the SAA7111 has, and use that
defined value where relevant. This should prevent any future array overrun
like the one I just fixed in the saa7110 driver.
This patch also saves 8 bytes of memory as a side effect, as the register
cache was larger than needed.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/saa7111.c b/drivers/media/video/saa7111.c
index 8c06592..a2e1ccb 100644
--- a/drivers/media/video/saa7111.c
+++ b/drivers/media/video/saa7111.c
@@ -70,8 +70,10 @@
/* ----------------------------------------------------------------------- */
+#define SAA7111_NR_REG 0x18
+
struct saa7111 {
- unsigned char reg[32];
+ unsigned char reg[SAA7111_NR_REG];
int norm;
int input;
@@ -227,11 +229,11 @@
{
int i;
- for (i = 0; i < 32; i += 16) {
+ for (i = 0; i < SAA7111_NR_REG; i += 16) {
int j;
printk(KERN_DEBUG "%s: %03x", I2C_NAME(client), i);
- for (j = 0; j < 16; ++j) {
+ for (j = 0; j < 16 && i + j < SAA7111_NR_REG; ++j) {
printk(" %02x",
saa7111_read(client, i + j));
}