Messages in this thread | | | Subject | Re: [Xen-devel] [PATCH] pvcalls-front: fixes incorrect error handling | From | Boris Ostrovsky <> | Date | Mon, 26 Nov 2018 15:31:39 -0500 |
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On 11/21/18 9:07 PM, Pan Bian wrote: > kfree() is incorrectly used to release the pages allocated by > __get_free_page() and __get_free_pages(). Use the matching deallocators > i.e., free_page() and free_pages(), respectively. > > Signed-off-by: Pan Bian <bianpan2016@163.com> > --- > drivers/xen/pvcalls-front.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c > index 2f11ca7..77224d8 100644 > --- a/drivers/xen/pvcalls-front.c > +++ b/drivers/xen/pvcalls-front.c > @@ -385,8 +385,8 @@ static int create_active(struct sock_mapping *map, int *evtchn) > out_error: > if (*evtchn >= 0) > xenbus_free_evtchn(pvcalls_front_dev, *evtchn); > - kfree(map->active.data.in); > - kfree(map->active.ring); > + free_pages((unsigned long)map->active.data.in, PVCALLS_RING_ORDER);
Is map->active.data.in guaranteed to be NULL when entering this routine?
-boris
> + free_page((unsigned long)map->active.ring); > return ret; > } >
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