Re: [PATCH] virtfs-proxy-helper: Fix a resource leak in main()

[Alex Chen]

On 2020/11/26 18:50, Li Qiang wrote:
> Alex Chen <alex.chen@huawei.com>
>>
>> Only one of the options -s and -f can be used. When -f is used,
>> the fd is created externally and does not need to be closed.
>> When -s is used, a new socket fd is created, and this socket fd
>> needs to be closed at the end of main().
>>
>> Reported-by: Euler Robot <euler.robot@huawei.com>
>> Signed-off-by: Alex Chen <alex.chen@huawei.com>
>> ---
>>  fsdev/virtfs-proxy-helper.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/fsdev/virtfs-proxy-helper.c b/fsdev/virtfs-proxy-helper.c
>> index 15c0e79b06..339d477169 100644
>> --- a/fsdev/virtfs-proxy-helper.c
>> +++ b/fsdev/virtfs-proxy-helper.c
>> @@ -1154,6 +1154,9 @@ int main(int argc, char **argv)
>>      process_requests(sock);
>>  error:
>>      g_free(rpath);
>> +    if (sock_name) {
>> +        close(sock);
>> +    }
> 
> If 'proxy_socket' failed, you call close(-1).
> 
> Maybe following is better?
> 
> if (sock >= 0) {
>     close(sock);
> }
> 

Hi Qiang,

Thanks for your review.
The 'sock' need to be closed only when option -s is used, that is when 
'sock_name' is not NULL.
So maybe the following is better?

diff --git a/fsdev/virtfs-proxy-helper.c b/fsdev/virtfs-proxy-helper.c
index 15c0e79b06..3ba68d9878 100644
--- a/fsdev/virtfs-proxy-helper.c
+++ b/fsdev/virtfs-proxy-helper.c
@@ -1154,6 +1154,9 @@ int main(int argc, char **argv)
     process_requests(sock);
 error:
     g_free(rpath);
+    if (sock_name && (sock >= 0)) {
+        close(sock);
+    }
     g_free(sock_name);
     do_log(LOG_INFO, "Done\n");
     closelog();

Thanks,
Alex