[PATCH 4/4] s390/dasd: fix possible buffer overflow in copy_pair_show

[Stefan Haberland <sth@xxxxxxxxxxxxx>]

dasd_copy_relation->entry[] array might be accessed out of bounds if the
loop does not break.

Fixes: a91ff09d39f9 ("s390/dasd: add copy pair setup")
Signed-off-by: Stefan Haberland <sth@xxxxxxxxxxxxx>
Reviewed-by: Jan Hoeppner <hoeppner@xxxxxxxxxxxxx>
---
 drivers/s390/block/dasd_devmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index cb83f81da416..df17f0f9cb0f 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -1954,7 +1954,7 @@ dasd_copy_pair_show(struct device *dev,
 			break;
 		}
 	}
-	if (!copy->entry[i].primary)
+	if (i == DASD_CP_ENTRIES)
 		goto out;
 
 	/* print all secondary */
-- 
2.34.1