aacraid: prevent invalid pointer dereference

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / scsi / aacraid / commctrl.c

diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index d85ac1a..fbcd48d 100644 (file)
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -511,7 +511,8 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
                goto cleanup;
        }
 
-       if (fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr))) {
+       if ((fibsize < (sizeof(struct user_aac_srb) - sizeof(struct user_sgentry))) ||
+           (fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr)))) {
                rcode = -EINVAL;
                goto cleanup;
        }