diff options
Diffstat (limited to 'drivers/usb/core/devio.c')
| -rw-r--r-- | drivers/usb/core/devio.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 3beb6a862e80..f6ce6e26e0d4 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -238,6 +238,9 @@ static int usbdev_mmap(struct file *file, struct vm_area_struct *vma) dma_addr_t dma_handle = DMA_MAPPING_ERROR; int ret; + if (!(file->f_mode & FMODE_WRITE)) + return -EPERM; + ret = usbfs_increase_memory_usage(size + sizeof(struct usb_memory)); if (ret) goto error; @@ -1295,7 +1298,7 @@ static int do_proc_bulk(struct usb_dev_state *ps, return ret; len1 = bulk->len; - if (len1 < 0 || len1 >= (INT_MAX - sizeof(struct urb))) + if (len1 >= (INT_MAX - sizeof(struct urb))) return -EINVAL; if (bulk->ep & USB_DIR_IN) |