[dpdk-dev] [PATCH v3 2/3] vhost: fix fd leak in dirty logging setup

[Maxime Coquelin]

This patch fixes a file descriptor leak which happens
in the error path of vhost_user_set_log_base().

Fixes: 4796ad63ba1f ("examples/vhost: import userspace vhost application")
Cc: sta...@dpdk.org

Reported-by: Xuan Ding <xuan.d...@intel.com>
Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
---
 lib/librte_vhost/vhost_user.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 473fd778ca..94b066f0b9 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -2083,7 +2083,7 @@ vhost_user_set_log_base(struct virtio_net **pdev, struct 
VhostUserMsg *msg,
                VHOST_LOG_CONFIG(ERR,
                        "invalid log base msg size: %"PRId32" != %d\n",
                        msg->size, (int)sizeof(VhostUserLog));
-               return RTE_VHOST_MSG_RESULT_ERR;
+               goto close_msg_fds;
        }
 
        size = msg->payload.log.mmap_size;
@@ -2094,7 +2094,7 @@ vhost_user_set_log_base(struct virtio_net **pdev, struct 
VhostUserMsg *msg,
                VHOST_LOG_CONFIG(ERR,
                        "log offset %#"PRIx64" and log size %#"PRIx64" 
overflow\n",
                        off, size);
-               return RTE_VHOST_MSG_RESULT_ERR;
+               goto close_msg_fds;
        }
 
        VHOST_LOG_CONFIG(INFO,
@@ -2131,6 +2131,10 @@ vhost_user_set_log_base(struct virtio_net **pdev, struct 
VhostUserMsg *msg,
        msg->fd_num = 0;
 
        return RTE_VHOST_MSG_RESULT_REPLY;
+
+close_msg_fds:
+       close_msg_fds(msg);
+       return RTE_VHOST_MSG_RESULT_ERR;
 }
 
 static int vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
-- 
2.26.2