Date: Sun, 4 Jan 2009 16:23:29 +0100 (CET) From: Stefan Richter Subject: firewire: cdev: extend transaction payload size check Make the size check of ioctl_send_request and ioctl_send_broadcast_request speed dependent. Also change the error return code from -EINVAL to -EIO to distinguish this from other errors concerning the ioctl parameters. Another payload size limit for which we don't check here though is the remote node's Bus_Info_Block.max_rec. Signed-off-by: Stefan Richter --- drivers/firewire/fw-cdev.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) Index: linux/drivers/firewire/fw-cdev.c =================================================================== --- linux.orig/drivers/firewire/fw-cdev.c +++ linux/drivers/firewire/fw-cdev.c @@ -525,9 +525,8 @@ static int init_request(struct client *c struct outbound_transaction_event *e; int ret; - /* What is the biggest size we'll accept, really? */ - if (request->length > 4096) - return -EINVAL; + if (request->length > 4096 || request->length > 512 << speed) + return -EIO; e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); if (e == NULL)