gevent.exceptions.LoopExit exception

[jhtshr]

*Describe the bug
When simulating the /bin/sh process, after the shell starts, the pwd command displays normally, but when the ls or id command is entered, it raises the gevent.exceptions.LoopExit exception.

Sample Code

from qiling import *
from qiling.const import QL_VERBOSE

def custom_geteuid32(ql, *args, **kwargs):
    return 0  

def my_sandbox(path, rootfs):
    # setup Qiling engine
    ql = Qiling(path, rootfs,verbose=QL_VERBOSE.DEBUG,console=True,multithread=True) # QL_VERBOSE.OFF QL_VERBOSE.DEBUG
    ql.os.set_syscall("geteuid32", custom_geteuid32) 
    ql.run()

if __name__ == "__main__":
    my_sandbox(["./rootfs/bin/sh"], "./rootfs/")

Expected behavior
all command in shell displays normally

Screenshots

[+] [Thread 2000]       Received interrupt: 0x2
[+] [Thread 294468]     Received interrupt: 0x2
[+] [Thread 294468]     0x901ca24c: futex(uaddr = 0x9021f034, op = 0x0, val = 0x2, timeout = 0x0, uaddr2 = 0x1, val3 = 0x9021f034) = 0x0
[+] [Thread 294468]     Suspended at 0x901ca24c
[+] [Thread 294468]     Saved context. c13_c0_3=0x902224a0
[+] [Thread 294468]     Call sched_cb: <function QlLinuxFutexManagement.futex_wait.<locals>._sched_wait_event at 0x7f800df500d0>
[+] [Thread 294468]     Wait for notifications.
Traceback (most recent call last):
  File "qiling_vigor.py", line 15, in <module>
    my_sandbox(["./rootfs/bin/sh"], "./rootfs/")
  File "qiling_vigor.py", line 12, in my_sandbox
    ql.run()
  File "/root/.local/lib/python3.8/site-packages/qiling/core.py", line 597, in run
    self.os.run()
  File "/root/.local/lib/python3.8/site-packages/qiling/os/linux/linux.py", line 164, in run
    thread_management.run()
  File "/root/.local/lib/python3.8/site-packages/qiling/os/linux/thread.py", line 618, in run
    gevent.joinall([self.main_thread], raise_error=True)
  File "src/gevent/greenlet.py", line 1065, in gevent._gevent_cgreenlet.joinall
  File "src/gevent/greenlet.py", line 1078, in gevent._gevent_cgreenlet.joinall
  File "src/gevent/_hub_primitives.py", line 185, in gevent._gevent_c_hub_primitives._WaitIterator.__next__
  File "src/gevent/_hub_primitives.py", line 176, in gevent._gevent_c_hub_primitives._WaitIterator.__next__
  File "src/gevent/_waiter.py", line 195, in gevent._gevent_c_waiter.MultipleWaiter.get
  File "src/gevent/_waiter.py", line 154, in gevent._gevent_c_waiter.Waiter.get
  File "src/gevent/_greenlet_primitives.py", line 61, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
  File "src/gevent/_greenlet_primitives.py", line 61, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
  File "src/gevent/_greenlet_primitives.py", line 65, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
  File "src/gevent/_gevent_c_greenlet_primitives.pxd", line 35, in gevent._gevent_c_greenlet_primitives._greenlet_switch
gevent.exceptions.LoopExit: This operation would block forever
        Hub: <Hub '' at 0x7f800e083810 epoll default pending=0 ref=0 fileno=3 thread_ident=0x7f805236a740>
        Handles:
[]
[+] [Thread 2000]       0x9018b1fc: wait4(pid = 0xffffffff, wstatus = 0x7ff3ca14, options = 0x0, rusage = 0x0) = 0x47e44
[+] [Thread 2000]       Received interrupt: 0x2
[+] [Thread 2000]       0x901b5b1c: ioctl(fd = 0x0, cmd = 0x5401, arg = 0x7ff3ba0c) = 0x0
[+] [Thread 2000]       Received interrupt: 0x2

Additional context

└─# python3 qiling_v.py


BusyBox v1.4.2 (2022-04-13 20:52:17 CST) Built-in shell (ash)
Enter 'help' for a list of built-in commands.

./rootfs/bin/sh: can't access tty; job control turned off
/ # pwd

/
/ # ls
ls
Traceback (most recent call last):
  File "qiling_vigor.py", line 15, in <module>
    my_sandbox(["./rootfs/bin/sh"], "./rootfs/")
  File "qiling_vigor.py", line 12, in my_sandbox
    ql.run()
  File "/root/.local/lib/python3.8/site-packages/qiling/core.py", line 597, in run
    self.os.run()
  File "/root/.local/lib/python3.8/site-packages/qiling/os/linux/linux.py", line 164, in run
    thread_management.run()
  File "/root/.local/lib/python3.8/site-packages/qiling/os/linux/thread.py", line 618, in run
    gevent.joinall([self.main_thread], raise_error=True)
  File "src/gevent/greenlet.py", line 1065, in gevent._gevent_cgreenlet.joinall
  File "src/gevent/greenlet.py", line 1078, in gevent._gevent_cgreenlet.joinall
  File "src/gevent/_hub_primitives.py", line 185, in gevent._gevent_c_hub_primitives._WaitIterator.__next__
  File "src/gevent/_hub_primitives.py", line 176, in gevent._gevent_c_hub_primitives._WaitIterator.__next__
  File "src/gevent/_waiter.py", line 195, in gevent._gevent_c_waiter.MultipleWaiter.get
  File "src/gevent/_waiter.py", line 154, in gevent._gevent_c_waiter.Waiter.get
  File "src/gevent/_greenlet_primitives.py", line 61, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
  File "src/gevent/_greenlet_primitives.py", line 61, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
  File "src/gevent/_greenlet_primitives.py", line 65, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
  File "src/gevent/_gevent_c_greenlet_primitives.pxd", line 35, in gevent._gevent_c_greenlet_primitives._greenlet_switch
gevent.exceptions.LoopExit: This operation would block forever
        Hub: <Hub '' at 0x7f735e5a4680 epoll default pending=0 ref=0 fileno=3 thread_ident=0x7f73a289b740>
        Handles:
[]
/ # 

[iMoD1998]

Did you ever find a fix? I'm getting this same issue.