gh-128116: Skip test_socket VSOCK testStream() on PermissionError

[vstinner]

• Issue: [PPC64LE buildbots] test_socket: VSOCK testStream(): recv fails with EACCES on Fedora 41 #128116

[vstinner]

!buildbot PPC64LE Fedora Stable PR

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @vstinner for commit e587ce5 🤖

The command will test the builders whose names match following regular expression: PPC64LE Fedora Stable PR

The builders matched are:

• PPC64LE Fedora Stable PR

[vstinner]

I only found two lines in Linux net/vmw_vsock/ using EACCES, both in "bind" operations:

• https://github.com/torvalds/linux/blob/8faabc041a001140564f718dabe37753e88b37fa/net/vmw_vsock/af_vsock.c#L665
• https://github.com/torvalds/linux/blob/8faabc041a001140564f718dabe37753e88b37fa/net/vmw_vsock/vmci_transport.c#L1677C11-L1677C17

Example:

	if (port <= LAST_RESERVED_PORT && !capable(CAP_NET_BIND_SERVICE))
		return -EACCES;

But the Python test uses port 1234 which is greater than LAST_RESERVED_PORT (1023).

[miss-islington-app]

Thanks @vstinner for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13.
🐍🍒⛏🤖

[bedevere-app]

GH-128123 is a backport of this pull request to the 3.13 branch.

[miss-islington-app]

Thanks @vstinner for the PR 🌮🎉.. I'm working now to backport this PR to: 3.12.
🐍🍒⛏🤖

[bedevere-app]

GH-128124 is a backport of this pull request to the 3.12 branch.