lkml.org 
[lkml]   [2019]   [Sep]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] media: meson: Add NULL check after the call to kmalloc()
2019년 9월 4일 (수) 오후 5:45, Greg KH <gregkh@linuxfoundation.org>님이 작성:
>
> On Wed, Sep 04, 2019 at 05:22:32PM +0900, Austin Kim wrote:
> > If the kmalloc() return NULL, the NULL pointer dereference will occur.
> > new_ts->ts = ts;
> >
> > Add exception check after the call to kmalloc() is made.
> >
> > Signed-off-by: Austin Kim <austindh.kim@gmail.com>
> > ---
> > drivers/staging/media/meson/vdec/vdec_helpers.c | 4 ++++
> > 1 file changed, 4 insertions(+)
> >
> > diff --git a/drivers/staging/media/meson/vdec/vdec_helpers.c b/drivers/staging/media/meson/vdec/vdec_helpers.c
> > index f16948b..e7e56d5 100644
> > --- a/drivers/staging/media/meson/vdec/vdec_helpers.c
> > +++ b/drivers/staging/media/meson/vdec/vdec_helpers.c
> > @@ -206,6 +206,10 @@ void amvdec_add_ts_reorder(struct amvdec_session *sess, u64 ts, u32 offset)
> > unsigned long flags;
> >
> > new_ts = kmalloc(sizeof(*new_ts), GFP_KERNEL);
> > + if (!new_ts) {
> > + dev_err(sess->core->dev, "Failed to kmalloc()\n");
>
> Did you run this through checkpatch? I think it will say that this line
> is not ok.
>
> > + return;
>
> Shouldn't you return an -ENOMEM error somehow?

I agreed with your feedback.
Let me take a look at the code more and then resend the patch if necessary.

Thanks,
Austin Kim
>
> thanks,
>
> greg k-h

\
 
 \ /
  Last update: 2019-09-05 00:40    [W:0.047 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site