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Re: [Qemu-devel] [PULL 02/11] vhost-user: check unix_listen() return val
From: |
Marc-André Lureau |
Subject: |
Re: [Qemu-devel] [PULL 02/11] vhost-user: check unix_listen() return value |
Date: |
Wed, 26 Jun 2019 21:37:47 +0200 |
Hi
On Wed, Jun 26, 2019 at 7:56 PM Eric Blake <address@hidden> wrote:
>
> On 6/16/19 4:36 PM, Michael S. Tsirkin wrote:
> > From: Marc-André Lureau <address@hidden>
> >
> > This check shouldn't be necessary, since &error_fatal is given as
> > argument and will exit() on failure. However, this change should
> > silence coverity CID 1401761 & 1401705.
> >
> > Signed-off-by: Marc-André Lureau <address@hidden>
> > Message-Id: <address@hidden>
> > Reviewed-by: Michael S. Tsirkin <address@hidden>
> > Signed-off-by: Michael S. Tsirkin <address@hidden>
> > ---
> > contrib/vhost-user-gpu/main.c | 4 ++++
> > contrib/vhost-user-input/main.c | 4 ++++
> > 2 files changed, 8 insertions(+)
> >
> > diff --git a/contrib/vhost-user-gpu/main.c b/contrib/vhost-user-gpu/main.c
> > index 9614c9422c..e0b6df5b4d 100644
> > --- a/contrib/vhost-user-gpu/main.c
> > +++ b/contrib/vhost-user-gpu/main.c
> > @@ -1160,6 +1160,10 @@ main(int argc, char *argv[])
> >
> > if (opt_socket_path) {
> > int lsock = unix_listen(opt_socket_path, &error_fatal);
> > + if (lsock < 0) {
> > + g_printerr("Failed to listen on %s.\n", opt_socket_path);
> > + exit(EXIT_FAILURE);
> > + }
>
> 4 lines to appease Coverity; wouldn't the following one-liner also do
> the trick?
>
> int lsock = unix_listen(opt_socket_path, &error_fatal);
> assert (lsock >= 0);
Probably, I didn't think too much about it. However looking at it now,
it would be worthwhile to report the error to the user in a friendlier
way than what error_fatal do. So I guess a follow-up patch should
introduce a local Error.
>
> --
> Eric Blake, Principal Software Engineer
> Red Hat, Inc. +1-919-301-3226
> Virtualization: qemu.org | libvirt.org
>
--
Marc-André Lureau
- [Qemu-devel] [PATCH 0/5] Misc vhost-user fixes, Marc-André Lureau, 2019/06/05
- [Qemu-devel] [PATCH 1/5] vhost-user-gpu: do not send scanout update if no GPU socket, Marc-André Lureau, 2019/06/05
- [Qemu-devel] [PATCH 2/5] vhost-user: check unix_listen() return value, Marc-André Lureau, 2019/06/05
- [Qemu-devel] [PATCH 3/5] vhost-user: improve error report, Marc-André Lureau, 2019/06/05
- [Qemu-devel] [PATCH 4/5] vhost-user-input: check ioctl(EVIOCGNAME) return value, Marc-André Lureau, 2019/06/05
- [Qemu-devel] [PATCH 5/5] vhost-user-gpu: initialize msghdr & iov at declaration, Marc-André Lureau, 2019/06/05