* [PATCH] xen/arm: domain_vgic_init: Avoid double free on shared_irqs
@ 2014-07-25 14:17 Julien Grall
2014-09-08 20:47 ` Julien Grall
0 siblings, 1 reply; 6+ messages in thread
From: Julien Grall @ 2014-07-25 14:17 UTC (permalink / raw)
To: xen-devel; +Cc: stefano.stabellini, Julien Grall, tim, ian.campbell
When the function domain_vgic_init is failing to initialize pending_irqs,
it will free shared_irqs. Few call later, domain_vgic_free will be called
an try to free a second time the same variable. This will result to a double
free.
Remove the free in domain_vgic_init and rely on domain_vgic_free to correctly
release the memory.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
---
This patch should be backported to Xen 4.4.
---
xen/arch/arm/vgic.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index aba613b..edbb71a 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -84,10 +84,7 @@ int domain_vgic_init(struct domain *d, unsigned int nr_spis)
d->arch.vgic.pending_irqs =
xzalloc_array(struct pending_irq, d->arch.vgic.nr_spis);
if ( d->arch.vgic.pending_irqs == NULL )
- {
- xfree(d->arch.vgic.shared_irqs);
return -ENOMEM;
- }
for (i=0; i<d->arch.vgic.nr_spis; i++)
{
--
1.7.10.4
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH] xen/arm: domain_vgic_init: Avoid double free on shared_irqs
2014-07-25 14:17 [PATCH] xen/arm: domain_vgic_init: Avoid double free on shared_irqs Julien Grall
@ 2014-09-08 20:47 ` Julien Grall
2014-09-09 11:13 ` Ian Campbell
0 siblings, 1 reply; 6+ messages in thread
From: Julien Grall @ 2014-09-08 20:47 UTC (permalink / raw)
To: xen-devel; +Cc: stefano.stabellini, tim, ian.campbell
Hi Ian and Stefano,
Ping?
On 25/07/14 07:17, Julien Grall wrote:
> When the function domain_vgic_init is failing to initialize pending_irqs,
> it will free shared_irqs. Few call later, domain_vgic_free will be called
> an try to free a second time the same variable. This will result to a double
> free.
>
> Remove the free in domain_vgic_init and rely on domain_vgic_free to correctly
> release the memory.
>
> Signed-off-by: Julien Grall <julien.grall@linaro.org>
>
> ---
>
> This patch should be backported to Xen 4.4.
> ---
> xen/arch/arm/vgic.c | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
> index aba613b..edbb71a 100644
> --- a/xen/arch/arm/vgic.c
> +++ b/xen/arch/arm/vgic.c
> @@ -84,10 +84,7 @@ int domain_vgic_init(struct domain *d, unsigned int nr_spis)
> d->arch.vgic.pending_irqs =
> xzalloc_array(struct pending_irq, d->arch.vgic.nr_spis);
> if ( d->arch.vgic.pending_irqs == NULL )
> - {
> - xfree(d->arch.vgic.shared_irqs);
> return -ENOMEM;
> - }
>
> for (i=0; i<d->arch.vgic.nr_spis; i++)
> {
>
--
Julien Grall
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] xen/arm: domain_vgic_init: Avoid double free on shared_irqs
2014-09-08 20:47 ` Julien Grall
@ 2014-09-09 11:13 ` Ian Campbell
2014-09-09 18:51 ` Julien Grall
0 siblings, 1 reply; 6+ messages in thread
From: Ian Campbell @ 2014-09-09 11:13 UTC (permalink / raw)
To: Julien Grall; +Cc: xen-devel, tim, stefano.stabellini
Sorry, this one wasn't in my queue foirld for some reason. Acked +
applied.
On Mon, 2014-09-08 at 13:47 -0700, Julien Grall wrote:
> Hi Ian and Stefano,
>
> Ping?
>
> On 25/07/14 07:17, Julien Grall wrote:
> > When the function domain_vgic_init is failing to initialize pending_irqs,
> > it will free shared_irqs. Few call later, domain_vgic_free will be called
> > an try to free a second time the same variable. This will result to a double
> > free.
> >
> > Remove the free in domain_vgic_init and rely on domain_vgic_free to correctly
> > release the memory.
> >
> > Signed-off-by: Julien Grall <julien.grall@linaro.org>
> >
> > ---
> >
> > This patch should be backported to Xen 4.4.
> > ---
> > xen/arch/arm/vgic.c | 3 ---
> > 1 file changed, 3 deletions(-)
> >
> > diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
> > index aba613b..edbb71a 100644
> > --- a/xen/arch/arm/vgic.c
> > +++ b/xen/arch/arm/vgic.c
> > @@ -84,10 +84,7 @@ int domain_vgic_init(struct domain *d, unsigned int nr_spis)
> > d->arch.vgic.pending_irqs =
> > xzalloc_array(struct pending_irq, d->arch.vgic.nr_spis);
> > if ( d->arch.vgic.pending_irqs == NULL )
> > - {
> > - xfree(d->arch.vgic.shared_irqs);
> > return -ENOMEM;
> > - }
> >
> > for (i=0; i<d->arch.vgic.nr_spis; i++)
> > {
> >
>
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] xen/arm: domain_vgic_init: Avoid double free on shared_irqs
2014-09-09 11:13 ` Ian Campbell
@ 2014-09-09 18:51 ` Julien Grall
2014-09-10 9:27 ` Ian Campbell
0 siblings, 1 reply; 6+ messages in thread
From: Julien Grall @ 2014-09-09 18:51 UTC (permalink / raw)
To: Ian Campbell; +Cc: xen-devel, Tim Deegan, Stefano.Stabellini@citrix.com
On 9 September 2014 04:13, Ian Campbell <Ian.Campbell@citrix.com> wrote:
> Sorry, this one wasn't in my queue foirld for some reason. Acked +
> applied.
Thanks! The double free is also present on Xen 4.4. Can you put it on
your backport list?
Regards,
--
Julien Grall
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] xen/arm: domain_vgic_init: Avoid double free on shared_irqs
2014-09-09 18:51 ` Julien Grall
@ 2014-09-10 9:27 ` Ian Campbell
2014-09-10 19:04 ` Julien Grall
0 siblings, 1 reply; 6+ messages in thread
From: Ian Campbell @ 2014-09-10 9:27 UTC (permalink / raw)
To: Julien Grall; +Cc: xen-devel, Tim Deegan, Stefano.Stabellini@citrix.com
On Tue, 2014-09-09 at 11:51 -0700, Julien Grall wrote:
> On 9 September 2014 04:13, Ian Campbell <Ian.Campbell@citrix.com> wrote:
> > Sorry, this one wasn't in my queue foirld for some reason. Acked +
> > applied.
>
> Thanks! The double free is also present on Xen 4.4. Can you put it on
> your backport list?
It's already there, I should have said.
Ian.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] xen/arm: domain_vgic_init: Avoid double free on shared_irqs
2014-09-10 9:27 ` Ian Campbell
@ 2014-09-10 19:04 ` Julien Grall
0 siblings, 0 replies; 6+ messages in thread
From: Julien Grall @ 2014-09-10 19:04 UTC (permalink / raw)
To: Ian Campbell; +Cc: xen-devel, Tim Deegan, Stefano.Stabellini@citrix.com
On 10/09/14 02:27, Ian Campbell wrote:
> On Tue, 2014-09-09 at 11:51 -0700, Julien Grall wrote:
>> On 9 September 2014 04:13, Ian Campbell <Ian.Campbell@citrix.com> wrote:
>>> Sorry, this one wasn't in my queue foirld for some reason. Acked +
>>> applied.
>>
>> Thanks! The double free is also present on Xen 4.4. Can you put it on
>> your backport list?
>
> It's already there, I should have said.
Thanks!
--
Julien Grall
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-09-10 19:04 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2014-07-25 14:17 [PATCH] xen/arm: domain_vgic_init: Avoid double free on shared_irqs Julien Grall
2014-09-08 20:47 ` Julien Grall
2014-09-09 11:13 ` Ian Campbell
2014-09-09 18:51 ` Julien Grall
2014-09-10 9:27 ` Ian Campbell
2014-09-10 19:04 ` Julien Grall
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