site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=me.com; s=4d515a; t=1494574711; bh=puA+PKC5WR4q/r88qW4WCxcyjUHCeFedTJSLGkGB5lA=; h=Content-type:MIME-version:Subject:From:Date:Message-id:To; b=e2o3ggvwsbO7Og2Ud5px9HuYsUYNZ+W6BbNtWSBr/VvggfgARUOEVwqep7WOwadZn A74oxo3Bz9zo56EX2bUQmMb7xqVcymtDMFgHxp5pPWwz549TRF5ppVLAKmBo+pP8zL dQ1gkJ70k9K+mSAHdVjKXw0jcrucPK7NfbAFqKkPpHjoG8RCqzVvSmqCHU1SBufgCT erjRcWJlA6Qzf+wEivGyRZUMf4GT5SdSMTVdchUiGXgKi79BPy/tY+Q333ZvRmSME6 3Z4w6beUOcbQuD/+aloYFu0lyqh3JeoX9JpU5uEnQ8mJi8eyB+OJJO+eW7nic1edzr iQbHoHJCEXdeA== You can't find the string in xnu source because it's actually in libxpc. The string reads: `Kernel bug: The kernel cannot allocate memory needed for the pseudo-receive.' This indeed seems to be xnu bug (you can read osfmk/man/mach_msg for description of mach_msg pseudo-receive operation). It's probably a good idea to submit a radar along with a reproducer.

On 12 May 2017, at 09:13, Hasselqvist Anders <h-anders@unext.jp> wrote:

Hi all,

I’m sorry if this is the wrong place to post this question. I believe it is kernel related, but maybe not…

Our app (a video streaming app) has started receiving many crash reports from end users that we can’t really understand the root cause of. 99% of the reports are coming from iPads.

The call stack is like this:

---------------------- Crashed: Kernel bug: The kernel cannot allocate memory needed for the ps 0 libxpc.dylib 0x182820984 _xpc_connection_handle_sent_event + 576 1 libxpc.dylib 0x182820984 _xpc_connection_handle_sent_event + 576 2 libdispatch.dylib 0x1825ce28c _dispatch_client_callout4 + 16 3 libdispatch.dylib 0x1825d1d80 _dispatch_mach_msg_invoke + 328 4 libdispatch.dylib 0x1825dc210 _dispatch_queue_serial_drain + 468 5 libdispatch.dylib 0x1825d11e0 _dispatch_mach_invoke + 652 6 libdispatch.dylib 0x1825dc210 _dispatch_queue_serial_drain + 468 7 libdispatch.dylib 0x1825d19a4 _dispatch_queue_invoke + 652 8 libdispatch.dylib 0x1825dc8d8 _dispatch_queue_override_invoke + 360 9 libdispatch.dylib 0x1825de34c _dispatch_root_queue_drain + 572 10 libdispatch.dylib 0x1825de0ac _dispatch_worker_thread3 + 124 11 libsystem_pthread.dylib 0x1827d72a0 _pthread_wqthread + 1288 12 libsystem_pthread.dylib 0x1827d6d8c start_wqthread + 4 ----------------------

Does some one here have any advice on what “The kernel cannot allocate memory needed for the ps” actually means?

I checked the xnu open source archive but the string is not there.

Thanks, Anders

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