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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: xkernel.wang@foxmail.com, nsaenz@kernel.org,
	bcm-kernel-feedback-list@broadcom.com,
	linux-rpi-kernel@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] staging: mmal-vchiq: add a check for the return of vmalloc()
Date: Tue, 15 Mar 2022 18:53:14 +0300	[thread overview]
Message-ID: <20220315155314.GQ3293@kadam> (raw)
In-Reply-To: <YjCwagaijyA2oO8r@kroah.com>

On Tue, Mar 15, 2022 at 04:27:38PM +0100, Greg KH wrote:
> On Tue, Mar 15, 2022 at 10:42:07PM +0800, xkernel.wang@foxmail.com wrote:
> > From: Xiaoke Wang <xkernel.wang@foxmail.com>
> > 
> > vmalloc() is a memory allocation API which can return NULL when some
> > internal memory errors happen. So it is better to check the return
> > value of it to catch the error in time.
> > 
> > Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
> > ---
> > ChangeLog:
> > v1->v2  jump to the proper location and remove redundant instruction.
> >  drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
> > index 76d3f03..ff4b484 100644
> > --- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
> > +++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
> > @@ -1909,6 +1909,10 @@ int vchiq_mmal_init(struct vchiq_mmal_instance **out_instance)
> >  	mutex_init(&instance->vchiq_mutex);
> >  
> >  	instance->bulk_scratch = vmalloc(PAGE_SIZE);
> > +	if (!instance->bulk_scratch) {

Is ->bulk_scratch even used anywhere?

regards,
dan carpenter


WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: xkernel.wang@foxmail.com, nsaenz@kernel.org,
	bcm-kernel-feedback-list@broadcom.com,
	linux-rpi-kernel@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] staging: mmal-vchiq: add a check for the return of vmalloc()
Date: Tue, 15 Mar 2022 18:53:14 +0300	[thread overview]
Message-ID: <20220315155314.GQ3293@kadam> (raw)
In-Reply-To: <YjCwagaijyA2oO8r@kroah.com>

On Tue, Mar 15, 2022 at 04:27:38PM +0100, Greg KH wrote:
> On Tue, Mar 15, 2022 at 10:42:07PM +0800, xkernel.wang@foxmail.com wrote:
> > From: Xiaoke Wang <xkernel.wang@foxmail.com>
> > 
> > vmalloc() is a memory allocation API which can return NULL when some
> > internal memory errors happen. So it is better to check the return
> > value of it to catch the error in time.
> > 
> > Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
> > ---
> > ChangeLog:
> > v1->v2  jump to the proper location and remove redundant instruction.
> >  drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
> > index 76d3f03..ff4b484 100644
> > --- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
> > +++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
> > @@ -1909,6 +1909,10 @@ int vchiq_mmal_init(struct vchiq_mmal_instance **out_instance)
> >  	mutex_init(&instance->vchiq_mutex);
> >  
> >  	instance->bulk_scratch = vmalloc(PAGE_SIZE);
> > +	if (!instance->bulk_scratch) {

Is ->bulk_scratch even used anywhere?

regards,
dan carpenter


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  reply	other threads:[~2022-03-15 15:53 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-15 14:42 [PATCH v2] staging: mmal-vchiq: add a check for the return of vmalloc() xkernel.wang
2022-03-15 14:42 ` xkernel.wang
2022-03-15 15:27 ` Greg KH
2022-03-15 15:27   ` Greg KH
2022-03-15 15:53   ` Dan Carpenter [this message]
2022-03-15 15:53     ` Dan Carpenter
2022-03-15 16:23   ` Xiaoke Wang
2022-03-15 16:23     ` Xiaoke Wang
2022-03-16 14:08     ` gregkh
2022-03-16 14:08       ` gregkh

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