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Re: [Qemu-trivial] [PATCH] filter-mirror: segfault when specifying non e
From: |
Eduardo Otubo |
Subject: |
Re: [Qemu-trivial] [PATCH] filter-mirror: segfault when specifying non existent device |
Date: |
Thu, 7 Sep 2017 10:27:49 +0200 |
User-agent: |
Mutt/1.8.3+47 (5f034395e53d) (2017-05-23) |
On Tue, Aug 22, 2017 at 09:19:20AM +0800, Zhang Chen wrote:
>
>
> On 08/21/2017 11:50 PM, Eduardo Otubo wrote:
> > When using filter-mirror like the example below where the interface
> > 'ndev0' does not exist on the host, QEMU crashes into segmentation
> > fault.
> >
> > $ qemu-system-x86_64 -S -machine pc -netdev user,id=ndev0 -object
> > filter-mirror,id=test-object,netdev=ndev0
> >
> > This happens because the function filter_mirror_setup() does not checks
> > if the device actually exists and still keep on processing calling
> > qemu_chr_find(). This patch fixes this issue.
> >
> > Signed-off-by: Eduardo Otubo <address@hidden>
>
> Looks good for me.
>
> Reviewed-by: Zhang Chen<address@hidden>
Ping.
>
> Thanks
> Zhang Chen
>
> > ---
> > net/filter-mirror.c | 14 +++++++++++---
> > 1 file changed, 11 insertions(+), 3 deletions(-)
> >
> > diff --git a/net/filter-mirror.c b/net/filter-mirror.c
> > index 90e2c92337..e18a4b16a0 100644
> > --- a/net/filter-mirror.c
> > +++ b/net/filter-mirror.c
> > @@ -213,14 +213,22 @@ static void filter_mirror_setup(NetFilterState *nf,
> > Error **errp)
> > MirrorState *s = FILTER_MIRROR(nf);
> > Chardev *chr;
> > + if (s->outdev == NULL) {
> > + goto err;
> > + }
> > +
> > chr = qemu_chr_find(s->outdev);
> > +
> > if (chr == NULL) {
> > - error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
> > - "Device '%s' not found", s->outdev);
> > - return;
> > + goto err;
> > }
> > qemu_chr_fe_init(&s->chr_out, chr, errp);
> > +
> > +err:
> > + error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, "Device '%s' not found",
> > + nf->netdev_id);
> > + return;
> > }
> > static void redirector_rs_finalize(SocketReadState *rs)
>
> --
> Thanks
> Zhang Chen
>
>
>
>
--
Eduardo Otubo
Senior Software Engineer @ RedHat
- Re: [Qemu-trivial] [PATCH] filter-mirror: segfault when specifying non existent device,
Eduardo Otubo <=