jrsmroz / zsh Goto Github PK

Cylance antivirus crashes Zsh.

Example of stack trace:
Thread 1 Crashed:
0 libsystem_kernel.dylib 0x00007fff8a843f06 __pthread_kill + 10
1 libsystem_pthread.dylib 0x00007fff903c44ec pthread_kill + 90
2 libsystem_c.dylib 0x00007fff8ac5d6df abort + 129
3 libsystem_malloc.dylib 0x00007fff8c1a3041 free + 425
4 zle.so 0x0000000107476e12 0x107465000 + 73234
5 zle.so 0x0000000107476ba5 resetvideo + 138
6 zle.so 0x00000001074775f2 zrefresh + 1839
7 zle.so 0x000000010746ff09 0x107465000 + 44809
8 zsh 0x00000001071099a8 zleentry + 473
9 zsh 0x00000001071366a9 zhandler + 589
10 libsystem_platform.dylib 0x00007fff9d82f52a _sigtramp + 26
11 ??? 000000000000000000 0 + 0
12 CyMemDef.dylib 0x00000001071fbc97 ac_thread_proc + 1003
13 libsystem_pthread.dylib 0x00007fff903c199d _pthread_body + 131
14 libsystem_pthread.dylib 0x00007fff903c191a _pthread_start + 168
15 libsystem_pthread.dylib 0x00007fff903bf351 thread_start + 13

It seems that cylance antivirus is "somtimes?" catching and duplicating signals in separate thread. Unfortunately zsh is using signals to handle window resizing. As a result resizing procedure, that involves memory deallocation and allocation is called from two separate threads at the same time. The unexpected race condition crashes zsh.