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Fix Segfault When Syntax Of A Line Under [applicationmap] Is Invalid

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When processing the lines under the [applicationmap] context in features.conf, a
segfault occurs from attempting to process a line with an invalid syntax
(basically missing most of the arguments).

Example:
[applicationmap]
automon=*6

* This patch moves the checking for empty arguments to before they are accessed.

* Also, checked the "todo" comment and removed it.  Some applications do not
  require arguments.

(closes issue ASTERISK-22416)
Reported by: CGI.NET
Tested by: CGI.NET
Patches:
    asterisk-22416-check-syntax-first_v2.diff by Michael L. Young (license 5026)

Review: https://reviewboard.asterisk.org/r/2803


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@399304 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Michael L. Young
2013-09-18 01:32:36 +00:00
parent d847fec0cc
commit da09847884
1 changed files with 10 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
main/features.c
View File

@@ -5733,19 +5733,9 @@ static void process_applicationmap_line(struct ast_variable *var)
);
AST_STANDARD_APP_ARGS(args, tmp_val);
if ((new_syn = strchr(args.app, '('))) {
/* New syntax */
args.moh_class = args.app_args;
args.app_args = new_syn;
*args.app_args++ = '\0';
if (args.app_args[strlen(args.app_args) - 1] == ')') {
args.app_args[strlen(args.app_args) - 1] = '\0';
}
}
activateon = strsep(&args.activatedby, "/");
/*! \todo XXX var_name or app_args ? */
if (ast_strlen_zero(args.app)
|| ast_strlen_zero(args.exten)
|| ast_strlen_zero(activateon)
@@ -5756,6 +5746,16 @@ static void process_applicationmap_line(struct ast_variable *var)
return;
}
if ((new_syn = strchr(args.app, '('))) {
/* New syntax */
args.moh_class = args.app_args;
args.app_args = new_syn;
*args.app_args++ = '\0';
if (args.app_args[strlen(args.app_args) - 1] == ')') {
args.app_args[strlen(args.app_args) - 1] = '\0';
}
}
AST_RWLIST_RDLOCK(&feature_list);
if (find_dynamic_feature(var->name)) {
AST_RWLIST_UNLOCK(&feature_list);