res_pjsip_exten_state: PJSIPShowSubscriptionsInbound causes crash
Currently, it is possible for some subscriptions to get into a NULL state. When this occurs and the PJSIPShowSubscriptionsInbound ami action is issued and a device is subscribed for extension state then the associated subscription state object can't be located. The code then attempts to dereference a NULL object. Added a NULL check to avoid the problem. Reported by: John Bigelow ........ Merged revisions 426779 from http://svn.asterisk.org/svn/asterisk/branches/12 ........ Merged revisions 426780 from http://svn.asterisk.org/svn/asterisk/branches/13 git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@426781 65c4cc65-6c06-0410-ace0-fbb531ad65f3
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@ -457,6 +457,10 @@ static void to_ami(struct ast_sip_subscription *sub,
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struct exten_state_subscription *exten_state_sub =
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get_exten_state_sub(sub);
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if (!exten_state_sub) {
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return;
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}
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ast_str_append(buf, 0, "SubscriptionType: extension_state\r\n"
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"Extension: %s\r\nExtensionStates: %s\r\n",
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exten_state_sub->exten, ast_extension_state2str(
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