USB: iowarrior.c: fix NULL dereference

Am Montag, 19. 2007 10:25 schrieb Adrian Bunk:
> The Coverity checker spotted the following NULL dereference:

And this fixes an oops upon allocation failures.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
index d69665c8de0..de97ed7b0b9 100644
--- a/drivers/usb/misc/iowarrior.c
+++ b/drivers/usb/misc/iowarrior.c
@@ -417,14 +417,14 @@ static ssize_t iowarrior_write(struct file *file,
                 if (!int_out_urb) {
                         retval = -ENOMEM;
                         dbg("%s Unable to allocate urb ", __func__);
-                        goto error;
+                        goto error_no_urb;
                 }
                 buf = usb_buffer_alloc(dev->udev, dev->report_size,
                                        GFP_KERNEL, &int_out_urb->transfer_dma);
                 if (!buf) {
                         retval = -ENOMEM;
                         dbg("%s Unable to allocate buffer ", __func__);
-                        goto error;
+                        goto error_no_buffer;
                 }
                 usb_fill_int_urb(int_out_urb, dev->udev,
                                  usb_sndintpipe(dev->udev,
@@ -459,7 +459,9 @@ static ssize_t iowarrior_write(struct file *file,
 error:
         usb_buffer_free(dev->udev, dev->report_size, buf,
                         int_out_urb->transfer_dma);
+error_no_buffer:
         usb_free_urb(int_out_urb);
+error_no_urb:
         atomic_dec(&dev->write_busy);
         wake_up_interruptible(&dev->write_wait);
 exit: