Crashes on macOS 11.3 beta with Packet filter

Question

Created Feb ’21

Replies 2

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Hi,
After upgrading OS to 11.3 beta, we are seeing Network Extension crashes. When removing PacketFilter from the extension, crashes stop.

Crash logs suggests issue is in the beta OS rather than on the extension itself:

Code Block Thread 2 Crashed:: Dispatch queue: com.apple.network.connections
0   libdispatch.dylib             	0x00007fff203c92e0 dispatch_async + 153
1   libnetwork.dylib              	0x00007fff2436fd51 nw_queue_context_async + 81
2   libnetwork.dylib              	0x00007fff24795fd4 nw_interpose_handle_path_update_locked + 372
3   libnetwork.dylib              	0x00007fff24795e3c __nw_interpose_start_block_invoke.3 + 108
4   libdispatch.dylib             	0x00007fff203c4673 _dispatch_call_block_and_release + 12
5   libdispatch.dylib             	0x00007fff203c5856 _dispatch_client_callout + 8
6   libdispatch.dylib             	0x00007fff203cd4cc _dispatch_workloop_invoke + 2140
7   libdispatch.dylib             	0x00007fff203d5c5d _dispatch_workloop_worker_thread + 811
8   libsystem_pthread.dylib       	0x00007fff2056c4c0 _pthread_wqthread + 314
9   libsystem_pthread.dylib       	0x00007fff2056b493 start_wqthread + 15

Is this a known issue?

We have also opened a ticket FB8995139

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Answer 1

fredrik136 OP

Feb ’21

We are seeing similar issue, reported as FB8996394.

Code Block context_is_inline called with null context, dumping backtrace:    [x86_64] libnetcore-2288.100.93
  0 libnetwork.dylib          0x00007fff247b10d8 nw_create_backtrace_string + 120
  1 libnetwork.dylib          0x00007fff243f5004 nw_context_is_inline + 276
  2 libnetwork.dylib          0x00007fff24358d2e nw_queue_context_async + 46
  3 libnetwork.dylib          0x00007fff2477efd4 nw_interpose_handle_path_update_locked + 372
  4 libnetwork.dylib          0x00007fff2477ee3c nw_interpose_start_block_invoke.3 + 108
  5 libdispatch.dylib         0x00007fff203ad673 _dispatch_call_block_and_release + 12
  6 libdispatch.dylib         0x00007fff203ae856 _dispatch_client_callout + 8
  7 libdispatch.dylib         0x00007fff203b64cc _dispatch_workloop_invoke + 2140
  8 libdispatch.dylib         0x00007fff203bec5d _dispatch_workloop_worker_thread + 811
  9 libsystem_pthread.dylib      0x00007fff205554c0 _<…>

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Answer 2

DTS Engineer OP

Apple

Feb ’21

The bug reported by obenshalom (FB8995139) was classified as a duplicate of bug reported internally (r. 73960881). We think we understand what’s causing the crash, although there’s no fix in the currently seeded 11.3 beta (20E5172i). Please re-test on future betas as they are seeded.

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