KERN_INVALID_ADDRESS crash in [currentRunLoop runMode]

[esilverberg]

I just ported my application to CocoaAsyncSocket, and now my number 1 crashing bug is one in CocoaAsyncSocket: GCDAsyncSocket-CFStream

Crashed: GCDAsyncSocket-CFStream
EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000000000000

Here is the thread

0
libsystem_pthread.dylib	
pthread_mutex_lock + 1330
1	CoreFoundation	
CFRunLoopSourceSignal + 64
2	Foundation	
performQueueDequeue + 468
3	Foundation	
__NSThreadPerformPerform + 136
4	CoreFoundation	
__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
5	CoreFoundation	
__CFRunLoopDoSources0 + 388
6	CoreFoundation	
__CFRunLoopRun + 744
7	CoreFoundation	
CFRunLoopRunSpecific + 424
8
Foundation	
-[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304
9	CocoaAsyncSocket	
GCDAsyncSocket.m line 7533
+[GCDAsyncSocket cfstreamThread]
10
Foundation	
__NSThread__start__ + 996
11	libsystem_pthread.dylib	
_pthread_body + 240
12	libsystem_pthread.dylib	
_pthread_body + 282
13
libsystem_pthread.dylib	
thread_start + 4

I also can see that I have 2 other threads running the following code:

0
libsystem_kernel.dylib	
__psynch_cvwait + 8
1	libsystem_pthread.dylib	
_pthread_cond_wait + 640
2	Foundation	
-[NSCondition wait] + 240
3	Foundation	
-[NSObject(NSThreadPerformAdditions) performSelector:onThread:withObject:waitUntilDone:modes:] + 764
4
Foundation	
-[NSObject(NSThreadPerformAdditions) performSelector:onThread:withObject:waitUntilDone:] + 128
5	CocoaAsyncSocket	
GCDAsyncSocket.m line 7816
-[GCDAsyncSocket addStreamsToRunLoop]
6	CocoaAsyncSocket	
GCDAsyncSocket.m line 2916
__29-[GCDAsyncSocket didConnect:]_block_invoke.408
7	CocoaAsyncSocket	
GCDAsyncSocket.m line 2944
__29-[GCDAsyncSocket didConnect:]_block_invoke_2
8
libdispatch.dylib	
_dispatch_call_block_and_release + 24
9	libdispatch.dylib	
_dispatch_client_callout + 16
10	libdispatch.dylib	
_dispatch_queue_serial_drain + 928
11	libdispatch.dylib	
_dispatch_queue_invoke + 884
12	libdispatch.dylib	
_dispatch_queue_override_invoke + 344
13	libdispatch.dylib	
_dispatch_root_queue_drain + 540
14	libdispatch.dylib	
_dispatch_worker_thread3 + 124
15	libsystem_pthread.dylib	
_pthread_wqthread + 1096
16
libsystem_pthread.dylib	
start_wqthread + 4

and

0
libsystem_kernel.dylib	
__psynch_cvwait + 8
1	libsystem_pthread.dylib	
_pthread_cond_wait + 640
2	Foundation	
-[NSCondition wait] + 240
3	Foundation	
-[NSObject(NSThreadPerformAdditions) performSelector:onThread:withObject:waitUntilDone:modes:] + 764
4
Foundation	
-[NSObject(NSThreadPerformAdditions) performSelector:onThread:withObject:waitUntilDone:] + 128
5	CocoaAsyncSocket	
GCDAsyncSocket.m line 7816
-[GCDAsyncSocket addStreamsToRunLoop]
6	CocoaAsyncSocket	
GCDAsyncSocket.m line 2916
__29-[GCDAsyncSocket didConnect:]_block_invoke.408
7	CocoaAsyncSocket	
GCDAsyncSocket.m line 2944
__29-[GCDAsyncSocket didConnect:]_block_invoke_2
8
libdispatch.dylib	
_dispatch_call_block_and_release + 24
9	libdispatch.dylib	
_dispatch_client_callout + 16
10	libdispatch.dylib	
_dispatch_queue_serial_drain + 928
11	libdispatch.dylib	
_dispatch_queue_invoke + 884
12	libdispatch.dylib	
_dispatch_queue_override_invoke + 344
13	libdispatch.dylib	
_dispatch_root_queue_drain + 540
14	libdispatch.dylib	
_dispatch_worker_thread3 + 124
15	libsystem_pthread.dylib	
_pthread_wqthread + 1096
16
libsystem_pthread.dylib	
start_wqthread + 4

The crashing line is in this static method:

+ (void)cfstreamThread { @autoreleasepool
{
	[[NSThread currentThread] setName:GCDAsyncSocketThreadName];
	
	LogInfo(@"CFStreamThread: Started");
	
	// We can't run the run loop unless it has an associated input source or a timer.
	// So we'll just create a timer that will never fire - unless the server runs for decades.
	[NSTimer scheduledTimerWithTimeInterval:[[NSDate distantFuture] timeIntervalSinceNow]
	                                 target:self
	                               selector:@selector(ignore:)
	                               userInfo:nil
	                                repeats:YES];
	
	NSThread *currentThread = [NSThread currentThread];
	NSRunLoop *currentRunLoop = [NSRunLoop currentRunLoop];
	
	BOOL isCancelled = [currentThread isCancelled];
	
	while (!isCancelled && [currentRunLoop runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]])
	{
		isCancelled = [currentThread isCancelled];
	}
	
	LogInfo(@"CFStreamThread: Stopped");
}}

and is specifically this line:

[currentRunLoop runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]

Can anyone suggest why this method could be triggering an invalid nil address exception in CocoaAsyncSocket?

Thanks!

[mttirnavali]

I'm also getting same crash, waiting for any fix/progress, thanks

@chrisballinger , does this commit fix the issue?

Crashed: GCDAsyncSocket-CFStream
0 libsystem_pthread.dylib 0x19027b2bc pthread_mutex_lock + 1330
1 CoreFoundation 0x191095a48 CFRunLoopSourceSignal + 64
2 Foundation 0x191bc5370 performQueueDequeue + 468
3 Foundation 0x191cae3f0 __NSThreadPerformPerform + 136
4 CoreFoundation 0x191169424 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 24
5 CoreFoundation 0x191168cfc __CFRunLoopDoSources0 + 388
6 CoreFoundation 0x1911669a0 __CFRunLoopRun + 744
7 CoreFoundation 0x191096d94 CFRunLoopRunSpecific + 424
8 Foundation 0x191bb0d64 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304
9 CocoaAsyncSocket 0x10031cc6c +[GCDAsyncSocket cfstreamThread] (GCDAsyncSocket.m:7529)
10 Foundation 0x191cae2c8 NSThread__start + 996
11 libsystem_pthread.dylib 0x19027d75c _pthread_body + 240
12 libsystem_pthread.dylib 0x19027d66c _pthread_body + 282
13 libsystem_pthread.dylib 0x19027ad84 thread_start + 4

[github-actions]

This issue has been marked as stale, it will be closed automatically if there is no further activity.

[HamzaYasin5]

i'm also getting the GCDAsyncSocket-CFStream (14): EXC_BAD_ACCESS (code=1, address=0x50) while asyncSocket deallocating.

[lifrancis]

I have encountered the same problem. May I ask how this problem was resolved later