Shared folders: rmdir on open directory fails with ETXTBSY

[Anders Kaseorg]

In a shared folder mounted from a Windows 10 host (1903 build 18362.295) in an Ubuntu guest (I've tried 18.04 or 19.04) with Guest Additions 6.0.12 installed from the Guest Additions CD, the following unexpectedly fails:

root@osboxes:/mnt/test# mkdir foo
root@osboxes:/mnt/test# python3 -c 'import shutil; shutil.rmtree("foo")'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3.7/shutil.py", line 495, in rmtree
    onerror(os.rmdir, path, sys.exec_info())
  File "/usr/lib/python3.7/shutil.py", line 493, in rmtree
    os.rmdir(path)
OSError: [Errno 26] Text file busy: 'foo'

strace reveals that Python has kept an open fd for the directory being removed.

Alternate reproduction recipe:

root@osboxes:/mnt/test# mkdir foo
root@osboxes:/mnt/test# perl -e 'opendir D, "foo"; rmdir "foo" or die $!'
Text file busy at -e line 1.

[Anders Kaseorg]

VirtualBox log

[paulson]

Similar to ticket #19003, can you update the Guest Additions and then report back?

[Anders Kaseorg]

Similar to ticket #19003, if you look at the log lines for the most recent boot, you’ll see that I did update the Guest Additions. The problem occurs with Guest Additions 6.0.12.

https://www.virtualbox.org/attachment/ticket/19004/ubuntu-test-2019-10-11-21-38-28.log#L1555

00:12:12.843089 VMMDev: Guest Additions information report: Version 6.0.12 r133076 '6.0.12'

[paulson]

OK, thanks for confirming that. Similar to #19003, I can't reproduce this on a Debian 10 guest or a Centos 7.7-1908 guest with the latest VirtualBox bits so could you try installing one of Testbuilds and the Guest Additions from there to see if this is still occurs for you?

[Anders Kaseorg]

I can still reproduce with Guest Additions 6.0.13 r133740 on Ubuntu 19.04 on VirtualBox 6.0.13 r133800 on Windows 10 1903 build 18362.356.

[Anders Kaseorg]

VirtualBox log from test build

[Anders Kaseorg]

For completeness, I can also reproduce with a Debian 10 guest or a CentOS 7.7-1908 guest.

[babydanks]

I am running into this same issue with python "rmtree". It is causing headaches for our developers that use Windows 10 hosts with an Ubuntu 18.04 or 20.04 guest on VirtualBox version 6.0+. This renders the shared folder unusable for us, so we are contemplating a switch to docker or VMware. I hope this can get looked at soon! Thanks.

[Frank Batschulat (Oracle)]

duplicate of #19086