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From 28419bdc2fd093bcbc68b629b9c7b8c295260c57 Mon Sep 17 00:00:00 2001
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From: Szymon Janc <szymon.janc@gmail.com>
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Date: Mon, 9 Dec 2013 20:20:55 +0100
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Subject: [PATCH 5/5] core: Fix crash due to agent callback freeing the agent
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Similar fix was provided for simple_agent_reply in a2f5d438 but missed
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pincode_reply case.
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Fix following:
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src/agent.c:agent_disconnect() Agent :1.48 disconnected
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src/agent.c:set_default_agent() Default agent cleared
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src/agent.c:agent_destroy() agent :1.48
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src/agent.c:agent_unref() 0x4701c68: ref=1
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Agent /org/bluez/agent replied with an error:
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org.freedesktop.DBus.Error.NoReply, Message did not receive a reply
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(timeout by message bus)
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src/adapter.c:btd_adapter_pincode_reply() hci0 addr 6C:0E:0D:DB:D1:16
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pinlen 0
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src/agent.c:agent_unref() 0x4701c68: ref=0
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src/adapter.c:btd_adapter_pincode_reply() hci0 addr 6C:0E:0D:DB:D1:16
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pinlen 0
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src/agent.c:agent_unref() 0x4701c68: ref=-1
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src/adapter.c:btd_adapter_pincode_reply() hci0 addr 6C:0E:0D:DB:D1:16
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pinlen 0
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src/agent.c:agent_unref() 0x4701c68: ref=-2
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...
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---
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src/agent.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/src/agent.c b/src/agent.c
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index b292881..2ec3183 100644
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--- a/src/agent.c
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+++ b/src/agent.c
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@@ -428,6 +428,9 @@ static void pincode_reply(DBusPendingCall *call, void *user_data)
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* is only called after a reply has been received */
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message = dbus_pending_call_steal_reply(call);
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+ /* Protect from the callback freeing the agent */
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+ agent_ref(agent);
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+
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dbus_error_init(&err;;
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if (dbus_set_error_from_message(&err, message)) {
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error("Agent %s replied with an error: %s, %s",
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@@ -467,6 +470,7 @@ done:
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dbus_pending_call_cancel(req->call);
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agent->request = NULL;
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agent_request_free(req, TRUE);
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+ agent_unref(agent);
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}
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static int pincode_request_new(struct agent_request *req, const char *device_path,
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--
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1.8.4.2
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