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Re: [Qemu-devel] [PATCH] monitor: properly handle invalid fd/vhostfd fro
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH] monitor: properly handle invalid fd/vhostfd from command line |
Date: |
Tue, 28 Sep 2010 16:57:44 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Tue, Sep 28, 2010 at 11:53:43AM -0300, Luiz Capitulino wrote:
> On Mon, 27 Sep 2010 15:52:44 +0800
> Jason Wang <address@hidden> wrote:
>
> > monitor_get_fd() may also be used to parse fd or vhostfd from command line,
> > so
> > we need to check whether the pointer of mon is NULL to avoid segmentation
> > fault
> > when user pass invalid name of fd or vhostfd.
>
> Invalid fdname is handled just fine, I have the impression this patch fixes
> something else.
>
> Could you elaborate on the real problem here and/or show to reproduce?
Try pasing fd= (no value) as a parameter, and see what happens.
> > Signed-off-by: Jason Wang <address@hidden>
> > ---
> > monitor.c | 4 ++++
> > 1 files changed, 4 insertions(+), 0 deletions(-)
> >
> > diff --git a/monitor.c b/monitor.c
> > index e602480..5bb4ff0 100644
> > --- a/monitor.c
> > +++ b/monitor.c
> > @@ -2345,6 +2345,10 @@ int monitor_get_fd(Monitor *mon, const char *fdname)
> > {
> > mon_fd_t *monfd;
> >
> > + if (mon == NULL) {
> > + return -1;
> > + }
> > +
> > QLIST_FOREACH(monfd, &mon->fds, next) {
> > int fd;
> >
> >
> >