stk: Fix crash seen in stk_alpha_id_unset

If there is no default agent, then current agent also will
be NULL. So, call stk_agent_request_cancel only when there is a valid
current agent.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/stk.c b/src/stk.c
index 4df23b55..e8ffb42b 100644
--- a/src/stk.c
+++ b/src/stk.c
@@ -529,7 +529,12 @@ static void stk_alpha_id_set(struct ofono_stk *stk,
 
 static void stk_alpha_id_unset(struct ofono_stk *stk)
 {
-	stk_agent_request_cancel(stk->current_agent);
+	/*
+	 * If there is no default agent, then current agent also will be NULL.
+	 * So, call request cancel only when there is a valid current agent.
+	 */
+	if (stk->current_agent)
+		stk_agent_request_cancel(stk->current_agent);
 }
 
 static int duration_to_msecs(const struct stk_duration *duration)