[asterisk-bugs] [JIRA] (ASTERISK-26226) Asterisk crash on AMI action "ShowDialplan" when there's a circular dependency between contexts

[Etienne Lessard (JIRA)]

Etienne Lessard created ASTERISK-26226:
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             Summary: Asterisk crash on AMI action "ShowDialplan" when there's a circular dependency between contexts
                 Key: ASTERISK-26226
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26226
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Core/PBX
    Affects Versions: 13.10.0, 13.9.1
            Reporter: Etienne Lessard


Given I have the following extensions.conf:
{noformat}
[C1]
include = C2
exten = 100,1,Hangup()

[C2]
include = C1
exten = 101,1,Hangup()
{noformat}
Given I have the following manager.conf:
{noformat}
[general]
enabled = yes
port = 5038

[foo]
secret = foo
write = all
deny = 0.0.0.0/0.0.0.0
permit = 127.0.0.1/255.255.255.0
{noformat}
When the AMI action "ShowDialplan" is requested with a Context and Extension argument, e.g.:
{noformat}
$ netcat 127.0.0.1 5038
Action: Login
Username: foo
Secret: foo

Action: ShowDialplan
Context: C1
Extension: 100

{noformat}
Then asterisk crash (it segfaults, caused by an "infinite" recursion)

I know circular dependencies between contexts are far from being recommended, but sometimes they exist, and I feel like asterisk should handle the case more gracefully than just crashing.

Note that the problem doesn't show up when doing a similar action via the CLI "dialplan show" command: instead, a warning "pbx.c:5442 show_dialplan_helper: Avoiding circular include of C2 within C1" is displayed



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