From: Nikanth Karthikesan <[email-masked]>

If a table containing zero as stripe count is passed into stripe_ctr
the code attempts to divide by zero.

This patch changes DM_TABLE_LOAD to return -EINVAL if the stripe count
is zero.
 
We now get the following error messages:
  device-mapper: table: 253:0: striped: Invalid stripe count
  device-mapper: ioctl: error adding target to table

Signed-off-by: Nikanth Karthikesan <[email-masked]>
Cc: [email-masked]
Signed-off-by: Alasdair G Kergon <[email-masked]>

---
 drivers/md/dm-stripe.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.33-rc8/drivers/md/dm-stripe.c
===================================================================
--- linux-2.6.33-rc8.orig/drivers/md/dm-stripe.c
+++ linux-2.6.33-rc8/drivers/md/dm-stripe.c
@@ -110,7 +110,7 @@ static int stripe_ctr(struct dm_target *
 	}
 
 	stripes = simple_strtoul(argv[0], &end, 10);
-	if (*end) {
+	if (!stripes || *end) {
 		ti->error = "Invalid stripe count";
 		return -EINVAL;
 	}