On 11/9/20 1:07 PM, Xia, Chenbo wrote:
> Hi Maxime,
>
>> -----Original Message-----
>> From: Maxime Coquelin <maxime.coque...@redhat.com>
>> Sent: Monday, November 9, 2020 7:26 PM
>> To: dev@dpdk.org; Ding, Xuan <xuan.d...@intel.com>;
>> step...@networkplumber.org; tho...@monjalon.net; sta...@dpdk.org; Xia,
>> Chenbo <chenbo....@intel.com>
>> Cc: Maxime Coquelin <maxime.coque...@redhat.com>
>> Subject: [PATCH v2 2/3] vhost: fix fd leak in dirty logging setup
>>
>> 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..e4ad5f6baf 100644
>> --- a/lib/librte_vhost/vhost_user.c
>> +++ b/lib/librte_vhost/vhost_user.c
>> @@ -2076,7 +2076,7 @@ vhost_user_set_log_base(struct virtio_net **pdev,
>> struct VhostUserMsg *msg,
>>
>> if (fd < 0) {
>> VHOST_LOG_CONFIG(ERR, "invalid log fd: %d\n", fd);
>> - return RTE_VHOST_MSG_RESULT_ERR;
>> + goto close_msg_fds;
>
> I remember we have agreed on simply return here? As I look back to v1, I think
> you may modify the wrong place. Because I see another 'goto close_msg_fds' is
> deleted compared with v1 😊.
>
> if (msg->size != sizeof(VhostUserLog)) {
> 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;
... I need more coffee it seems! Of course you are right, I reverted the
wrong line. Thanks for catching it.
v3 on its way.
Thanks,
Maxime
> Thanks!
> Chenbo
>
>> }
>>
>> if (msg->size != sizeof(VhostUserLog)) {
>> @@ -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
>
