From: Oliver Neukum <oliver@xxxxxxxxxx>
This patch fixes a memory leak in devio.c::processcompl
If writing to user space fails the packet must be discarded, as it
already has been removed from the queue of completed packets.
Signed-off-by: Oliver Neukum <oliver@xxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/core/devio.c | 16 ++++++++++------
1 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 3086090..706f181 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1231,22 +1231,22 @@ static int processcompl(struct async *as, void __user * __user *arg)
if (as->userbuffer)
if (copy_to_user(as->userbuffer, urb->transfer_buffer,
urb->transfer_buffer_length))
- return -EFAULT;
+ goto err_out;
if (put_user(as->status, &userurb->status))
- return -EFAULT;
+ goto err_out;
if (put_user(urb->actual_length, &userurb->actual_length))
- return -EFAULT;
+ goto err_out;
if (put_user(urb->error_count, &userurb->error_count))
- return -EFAULT;
+ goto err_out;
if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
for (i = 0; i < urb->number_of_packets; i++) {
if (put_user(urb->iso_frame_desc[i].actual_length,
&userurb->iso_frame_desc[i].actual_length))
- return -EFAULT;
+ goto err_out;
if (put_user(urb->iso_frame_desc[i].status,
&userurb->iso_frame_desc[i].status))
- return -EFAULT;
+ goto err_out;
}
}
@@ -1255,6 +1255,10 @@ static int processcompl(struct async *as, void __user * __user *arg)
if (put_user(addr, (void __user * __user *)arg))
return -EFAULT;
return 0;
+
+err_out:
+ free_async(as);
+ return -EFAULT;
}
static struct async *reap_as(struct dev_state *ps)
--
1.6.3.2
--
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