Fix crash that can occur if CLI registration fails for an aliased command.

A recent memory leak fix in main/cli.c causes an ast_cli_entry's command
field to be freed and NULLed if ast_cli_register() fails. res_clialiases
was ignoring the return value of ast_cli_register() and was then passing
the NULL command off to a a hash function. This resulted in a crash.

The fix is not to ignore the erroneous return value. If ast_cli_register()
fails, then we do not continue trying to process the current alias.
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Merged revisions 377840 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 377842 from http://svn.asterisk.org/svn/asterisk/branches/10
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Merged revisions 377843 from http://svn.asterisk.org/svn/asterisk/branches/11

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@377844 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/res/res_clialiases.c b/res/res_clialiases.c
index d9c4088bc8343ea3da8be367c2ca180f09d34ecb..17a847648e9576d2968c44d5b025b104a532ca4c 100644 (file)
--- a/res/res_clialiases.c
+++ b/res/res_clialiases.c
@@ -218,7 +218,10 @@ static void load_config(int reload)
                        alias->cli_entry.command = alias->alias;
                        alias->cli_entry.usage = "Aliased CLI Command\n";
 
-                       ast_cli_register(&alias->cli_entry);
+                       if (ast_cli_register(&alias->cli_entry)) {
+                               ao2_ref(alias, -1);
+                               continue;
+                       }
                        ao2_link(cli_aliases, alias);
                        ast_verb(2, "Aliased CLI command '%s' to '%s'\n", v1->name, v1->value);
                        ao2_ref(alias, -1);