1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c
index d8ac0ce2d6bf..f7559bfeaba3 100644
--- a/drivers/firewire/core-cdev.c
+++ b/drivers/firewire/core-cdev.c
@@ -563,6 +563,10 @@ static int init_request(struct client *client,
             (request->length > 4096 || request->length > 512 << speed))
                 return -EIO;
 
+        if (request->tcode == TCODE_WRITE_QUADLET_REQUEST &&
+            request->length < 4)
+                return -EINVAL;
+
         e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL);
         if (e == NULL)
                 return -ENOMEM;