CFNetwork _handleTLSEvent crash

App & System Services Networking
Jarosan OP
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As suggested earlier in https://forums.developer.apple.com/thread/76987 opening a new thread.

We are experiencing a CFNetwork TCPIOConnection::_handleTLSEvent crash. Full crash report here: https://gist.github.com/jarosan/af09485be31123bb6ebb9395ba9382f8


Thanks in advance!

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DTS Engineer OP
Apple

Thanks for opening a new thread about this. It is a different crash from the ones on that other thread. Alas, it seems to have a similar cause, namely a state error within CFNetwork. The specific cause of the crash is frame 5 of thread 8:

Thread 8 name:
Thread 8 Crashed:
0  … __pthread_kill + 8
1  … pthread_kill$VARIANT$mp + 396 (pthread.c:1484)
2  … __abort + 152 (abort.c:128)
3  … abort + 152 (abort.c:99)
4  … __assert_rtn + 316 (assert.c:91)
5  … TCPIOConnection::_handleTLSEvent(nw_tls_context*, tls_handshake_message_t, void () block_pointer, bool) + 772 (TCPIOConnection.cpp:4628)
6  … __tcp_connection_set_tls_message_handler_on_nw_connection_block_invoke + 168 (tcp_connection.m:1799)
7  … __boringssl_session_trigger_callback_block_invoke + 136 (boringssl_session.c:2770)
8  … _dispatch_call_block_and_release + 24 (init.c:994)
9  … _dispatch_client_callout + 16 (object.m:502)
10 … _dispatch_queue_serial_drain$VARIANT$mp + 528 (inline_internal.h:2500)
11 … _dispatch_queue_invoke$VARIANT$mp + 340 (queue.c:5302)
12 … _dispatch_queue_serial_drain$VARIANT$mp + 200 (inline_internal.h:2539)
13 … _dispatch_queue_invoke$VARIANT$mp + 340 (queue.c:5302)
14 … _dispatch_root_queue_drain_deferred_wlh$VARIANT$mp + 404 (queue.c:5920)
15 … _dispatch_workloop_worker_thread$VARIANT$mp + 644 (source.c:2529)
16 … _pthread_wqthread + 932 (pthread.c:2207)
17 … start_wqthread + 4
TCPIOConnection
is a C++ class internal to CFNetwork that manages a TCP connection. It has determined that it’s in an erroneous state and that’s tripped an assert.

We are tracking this problem internally (r. 33367468) but I can’t give you any estimate as to when it might be fixed.

I can assure you that this is very unlikely to be a problem in your code. This problem is affecting lots of different apps along with various system processes.

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tuckerfromaustin OP

Is there an update on a fix?

icon090 OP

Is there an update on a fix?