[dpdk-dev] [PATCH] net/virtio-user: check fd flags getting failure

[Yunjian Wang]

The function fcntl() could return errors,
the return value need to be checked.

Fixes: 6a84c37e3975 ("net/virtio-user: add vhost-user adapter layer")
Cc: stable at dpdk.org

Signed-off-by: Yunjian Wang <wangyunjian at huawei.com>
---
 drivers/net/virtio/virtio_user/vhost_user.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/virtio/virtio_user/vhost_user.c b/drivers/net/virtio/virtio_user/vhost_user.c
index cc830a660f..0a39393c45 100644
--- a/drivers/net/virtio/virtio_user/vhost_user.c
+++ b/drivers/net/virtio/virtio_user/vhost_user.c
@@ -840,8 +840,10 @@ vhost_user_setup(struct virtio_user_dev *dev)
 	}
 
 	flag = fcntl(fd, F_GETFD);
-	if (fcntl(fd, F_SETFD, flag | FD_CLOEXEC) < 0)
-		PMD_DRV_LOG(WARNING, "fcntl failed, %s", strerror(errno));
+	if (flag == -1)
+		PMD_DRV_LOG(WARNING, "fcntl get fd failed, %s", strerror(errno));
+	else if (fcntl(fd, F_SETFD, flag | FD_CLOEXEC) < 0)
+		PMD_DRV_LOG(WARNING, "fcntl set fd failed, %s", strerror(errno));
 
 	memset(&un, 0, sizeof(un));
 	un.sun_family = AF_UNIX;
-- 
2.27.0