lkml.org 
[lkml]   [2011]   [Aug]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch] xen-blkback: add missing return on error in xen_update_blkif_status()
On 08/05/11 16:18, Dan Carpenter wrote:
> We should return here after reporting the error. Otherwise we'd hit
> a NULL deref of blkif->xenblkd on the next line.
>
> Signed-off-by: Dan Carpenter<error27@gmail.com>
>
> diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
> index 32d4c3c..b750299 100644
> --- a/drivers/block/xen-blkback/xenbus.c
> +++ b/drivers/block/xen-blkback/xenbus.c
> @@ -107,6 +107,7 @@ static void xen_update_blkif_status(struct xen_blkif *blkif)
> err = PTR_ERR(blkif->xenblkd);
> blkif->xenblkd = NULL;
> xenbus_dev_error(blkif->be->dev, err, "start xenblkd");
> + return;
> }
>
> blkif->be->kthread_pid = blkif->xenblkd->pid;

In case somebody were asking for my opinion:

I think this block was the last block in the originally containing
function (update_blkif_status()?), thus the "return" wasn't needed
there. I guess the block got copied and then other code was added below it.

Acked-by: Laszlo Ersek <lersek@redhat.com>


\
 
 \ /
  Last update: 2011-08-05 17:07    [W:0.116 / U:0.080 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site