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SubjectRe: [PATCH] staging/hv: Fix memory leak of storvsc_dev_add()
On Wed, 1 Jun 2011 12:28:40 +0000
KY Srinivasan <kys@microsoft.com> wrote:

>
>
> > -----Original Message-----
> > From: devel-bounces@linuxdriverproject.org [mailto:devel-
> > bounces@linuxdriverproject.org] On Behalf Of Andre Bartke
> > Sent: Tuesday, May 31, 2011 5:46 PM
> > To: gregkh@suse.de
> > Cc: devel@driverdev.osuosl.org; Andre Bartke; Haiyang Zhang; linux-
> > kernel@vger.kernel.org
> > Subject: [PATCH] staging/hv: Fix memory leak of storvsc_dev_add()
> >
> > stor_device is not freed in storvsc_dev_add()
> > causing a memory leak in case of an allocation error.
> >
> > Signed-off-by: Andre Bartke <andre.bartke@gmail.com>
> > ---
> > drivers/staging/hv/storvsc.c | 1 +
> > 1 files changed, 1 insertions(+), 0 deletions(-)
> >
> > diff --git a/drivers/staging/hv/storvsc.c
> > b/drivers/staging/hv/storvsc.c index 06cd327..92b44f4 100644
> > --- a/drivers/staging/hv/storvsc.c
> > +++ b/drivers/staging/hv/storvsc.c
> > @@ -414,6 +414,7 @@ int storvsc_dev_add(struct hv_device *device,
> > device_info->target_id = stor_device->target_id;
> >
> > cleanup:
> > + free_stor_device(stor_device);
> > return ret;
>
> Was this patch tested? Even the normal path falls through the cleanup
> label and obviously you should not be freeing the stor_device in that
> case. I have patches queued up to cleanup some of the unnecessary
> labels and meaningless return values that I will be sending soon.
>
> Regards,
>
> K. Y
>
>
>

Right, I really messed up there, here is how it was supposed to be

From 5fe8c601bae555b03257d0e7ea57e42a99c5e634 Mon Sep 17 00:00:00 2001
From: Andre Bartke <andre.bartke@gmail.com>
Date: Wed, 1 Jun 2011 18:18:58 +0200
Subject: [PATCH] staging/hv: Fix memory leak of storvsc_dev_add()

stor_device is not freed in storvsc_dev_add()
causing a memory leak in case of an allocation error.

Signed-off-by: Andre Bartke <andre.bartke@gmail.com>
---
drivers/staging/hv/storvsc.c | 12 ++++++++----
1 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/hv/storvsc.c b/drivers/staging/hv/storvsc.c
index 06cd327..3d77c82 100644
--- a/drivers/staging/hv/storvsc.c
+++ b/drivers/staging/hv/storvsc.c
@@ -392,10 +392,8 @@ int storvsc_dev_add(struct hv_device *device,

device_info = (struct storvsc_device_info *)additional_info;
stor_device = alloc_stor_device(device);
- if (!stor_device) {
- ret = -1;
- goto cleanup;
- }
+ if (!stor_device)
+ goto err;

/* Save the channel properties to our storvsc channel */

@@ -413,6 +411,12 @@ int storvsc_dev_add(struct hv_device *device,
device_info->path_id = stor_device->path_id;
device_info->target_id = stor_device->target_id;

+ goto cleanup;
+
+err:
+ ret = -1;
+ free_stor_device(stor_device);
+
cleanup:
return ret;
}
--
1.7.5.2


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