[dpdk-stable] [dpdk-dev] [PATCH] vhost: fix unchecked return value
Jastrzebski, MichalX K
michalx.k.jastrzebski at intel.com
Mon Oct 2 16:18:05 CEST 2017
> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Kuba Kozak
> Sent: Friday, September 22, 2017 2:18 PM
> To: yliu at fridaylinux.org; maxime.coquelin at redhat.com
> Cc: dev at dpdk.org; Kozak, KubaX <kubax.kozak at intel.com>;
> jan.wickbom at ericsson.com; stable at dpdk.org
> Subject: [dpdk-dev] [PATCH] vhost: fix unchecked return value
>
> Add return value check for poll() call.
>
> Coverity issue: 140740
> Fixes: 59317cef249c ("vhost: allow many vhost-user ports")
> Cc: jan.wickbom at ericsson.com
> Cc: stable at dpdk.org
>
> Signed-off-by: Kuba Kozak <kubax.kozak at intel.com>
> ---
> lib/librte_vhost/fd_man.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/lib/librte_vhost/fd_man.c b/lib/librte_vhost/fd_man.c
> index 2ceacc9..4c6fed4 100644
> --- a/lib/librte_vhost/fd_man.c
> +++ b/lib/librte_vhost/fd_man.c
> @@ -222,6 +222,7 @@ fdset_event_dispatch(void *arg)
> int remove1, remove2;
> int need_shrink;
> struct fdset *pfdset = arg;
> + int val;
>
> if (pfdset == NULL)
> return NULL;
> @@ -239,7 +240,9 @@ fdset_event_dispatch(void *arg)
> numfds = pfdset->num;
> pthread_mutex_unlock(&pfdset->fd_mutex);
>
> - poll(pfdset->rwfds, numfds, 1000 /* millisecs */);
> + val = poll(pfdset->rwfds, numfds, 1000 /* millisecs */);
> + if (val < 0)
> + continue;
>
> need_shrink = 0;
> for (i = 0; i < numfds; i++) {
> --
> 2.7.4
Hi Yu / Maxime,
I would like to ask for a feedback regarding proposed fix.
If everything is ok with it, please send acked-by.
Best regards
Michal.
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