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Posted to commits@guacamole.apache.org by "Tony Gale (JIRA)" <ji...@apache.org> on 2018/10/01 10:36:00 UTC

[jira] [Commented] (GUACAMOLE-637) Compile error: 'strncpy' output may be truncated copying 7 bytes from a string of length 7

    [ https://issues.apache.org/jira/browse/GUACAMOLE-637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16633835#comment-16633835 ] 

Tony Gale commented on GUACAMOLE-637:
-------------------------------------

Possible patch for consideration:

--- svc_service.c	2018-09-28 02:25:30.000000000 +0100
+++ svc_service.c	2018-10-01 11:32:34.839596780 +0100
@@ -55,6 +55,8 @@
     /* Init channel def */
     strncpy(svc_plugin->plugin.channel_def.name, svc->name,
             GUAC_RDP_SVC_MAX_LENGTH);
+    svc_plugin->plugin.channel_def.name[GUAC_RDP_SVC_MAX_LENGTH] = '\0';
+
     svc_plugin->plugin.channel_def.options = 
           CHANNEL_OPTION_INITIALIZED
         | CHANNEL_OPTION_ENCRYPT_RDP


> Compile error: 'strncpy' output may be truncated copying 7 bytes from a string of length 7
> ------------------------------------------------------------------------------------------
>
>                 Key: GUACAMOLE-637
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-637
>             Project: Guacamole
>          Issue Type: Bug
>          Components: guacamole-server
>    Affects Versions: 1.0.0
>         Environment: Fedora 28
>            Reporter: Tony Gale
>            Priority: Major
>
> Build error on Fedora 28:
> CC guac_svc/guacsvc_client_la-svc_service.lo
> guac_svc/svc_service.c: In function 'VirtualChannelEntry':
> guac_svc/svc_service.c:56:5: error: 'strncpy' output may be truncated copying 7 bytes from a string of length 7 [-Werror=stringop-truncation]
>  strncpy(svc_plugin->plugin.channel_def.name, svc->name,
>  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>  GUAC_RDP_SVC_MAX_LENGTH);
>  ~~~~~~~~~~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors



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