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app_followme.c: Grab reference on nativeformats before using it
Fixes a crash due to a lack of proper reference on the nativeformats object before passing it into ast_request(). Also found potentially similar use case bugs in app_chanisavail.c, bridge.c, and bridge_basic.c Fixes: #388
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@@ -3288,10 +3288,17 @@ static struct ast_channel *dial_transfer(struct ast_channel *caller, const char
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{
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struct ast_channel *chan;
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int cause;
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struct ast_format_cap *caps;
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ast_channel_lock(caller);
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caps = ao2_bump(ast_channel_nativeformats(caller));
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ast_channel_unlock(caller);
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/* Now we request a local channel to prepare to call the destination */
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chan = ast_request("Local", ast_channel_nativeformats(caller), NULL, caller, destination,
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&cause);
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chan = ast_request("Local", caps, NULL, caller, destination, &cause);
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ao2_cleanup(caps);
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if (!chan) {
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return NULL;
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}
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