diff --git a/poky/bitbake/lib/bb/cooker.py b/poky/bitbake/lib/bb/cooker.py
index 5442f7d..1f4cc1e 100644
--- a/poky/bitbake/lib/bb/cooker.py
+++ b/poky/bitbake/lib/bb/cooker.py
@@ -1679,7 +1679,8 @@
         if self.hashserv:
             self.hashserv.process.terminate()
             self.hashserv.process.join()
-        bb.event.fire(CookerExit(), self.data)
+        if hasattr(self, "data"):
+            bb.event.fire(CookerExit(), self.data)
 
     def shutdown(self, force = False):
         if force:
diff --git a/poky/bitbake/lib/bb/fetch2/__init__.py b/poky/bitbake/lib/bb/fetch2/__init__.py
index 7ec1fea..551bfb7 100644
--- a/poky/bitbake/lib/bb/fetch2/__init__.py
+++ b/poky/bitbake/lib/bb/fetch2/__init__.py
@@ -1520,7 +1520,7 @@
                     if urlpath.find("/") != -1:
                         destdir = urlpath.rsplit("/", 1)[0] + '/'
                         bb.utils.mkdirhier("%s/%s" % (unpackdir, destdir))
-                cmd = 'cp -fpPRH %s %s' % (file, destdir)
+                cmd = 'cp -fpPRH "%s" "%s"' % (file, destdir)
 
         if not cmd:
             return
diff --git a/poky/bitbake/lib/bb/fetch2/git.py b/poky/bitbake/lib/bb/fetch2/git.py
index 644ba92..07064c6 100644
--- a/poky/bitbake/lib/bb/fetch2/git.py
+++ b/poky/bitbake/lib/bb/fetch2/git.py
@@ -236,7 +236,7 @@
                     ud.unresolvedrev[name] = ud.revisions[name]
                 ud.revisions[name] = self.latest_revision(ud, d, name)
 
-        gitsrcname = '%s%s' % (ud.host.replace(':', '.'), ud.path.replace('/', '.').replace('*', '.'))
+        gitsrcname = '%s%s' % (ud.host.replace(':', '.'), ud.path.replace('/', '.').replace('*', '.').replace(' ','_'))
         if gitsrcname.startswith('.'):
             gitsrcname = gitsrcname[1:]
 
@@ -342,7 +342,7 @@
             # We do this since git will use a "-l" option automatically for local urls where possible
             if repourl.startswith("file://"):
                 repourl = repourl[7:]
-            clone_cmd = "LANG=C %s clone --bare --mirror %s %s --progress" % (ud.basecmd, repourl, ud.clonedir)
+            clone_cmd = "LANG=C %s clone --bare --mirror \"%s\" %s --progress" % (ud.basecmd, repourl, ud.clonedir)
             if ud.proto.lower() != 'file':
                 bb.fetch2.check_network_access(d, clone_cmd, ud.url)
             progresshandler = GitProgressHandler(d)
@@ -354,8 +354,8 @@
             if "origin" in output:
               runfetchcmd("%s remote rm origin" % ud.basecmd, d, workdir=ud.clonedir)
 
-            runfetchcmd("%s remote add --mirror=fetch origin %s" % (ud.basecmd, repourl), d, workdir=ud.clonedir)
-            fetch_cmd = "LANG=C %s fetch -f --progress %s refs/*:refs/*" % (ud.basecmd, repourl)
+            runfetchcmd("%s remote add --mirror=fetch origin \"%s\"" % (ud.basecmd, repourl), d, workdir=ud.clonedir)
+            fetch_cmd = "LANG=C %s fetch -f --progress \"%s\" refs/*:refs/*" % (ud.basecmd, repourl)
             if ud.proto.lower() != 'file':
                 bb.fetch2.check_network_access(d, fetch_cmd, ud.url)
             progresshandler = GitProgressHandler(d)
@@ -504,7 +504,7 @@
             raise bb.fetch2.UnpackError("No up to date source found: " + "; ".join(source_error), ud.url)
 
         repourl = self._get_repo_url(ud)
-        runfetchcmd("%s remote set-url origin %s" % (ud.basecmd, repourl), d, workdir=destdir)
+        runfetchcmd("%s remote set-url origin \"%s\"" % (ud.basecmd, repourl), d, workdir=destdir)
 
         if self._contains_lfs(ud, d, destdir):
             if need_lfs and not self._find_git_lfs(d):
@@ -623,7 +623,7 @@
         d.setVar('_BB_GIT_IN_LSREMOTE', '1')
         try:
             repourl = self._get_repo_url(ud)
-            cmd = "%s ls-remote %s %s" % \
+            cmd = "%s ls-remote \"%s\" %s" % \
                 (ud.basecmd, repourl, search)
             if ud.proto.lower() != 'file':
                 bb.fetch2.check_network_access(d, cmd, repourl)
diff --git a/poky/bitbake/lib/bb/siggen.py b/poky/bitbake/lib/bb/siggen.py
index ad49d1e..86e0e16 100644
--- a/poky/bitbake/lib/bb/siggen.py
+++ b/poky/bitbake/lib/bb/siggen.py
@@ -358,7 +358,8 @@
         else:
             sigfile = stampbase + "." + task + ".sigbasedata" + "." + self.basehash[tid]
 
-        bb.utils.mkdirhier(os.path.dirname(sigfile))
+        with bb.utils.umask(0o002):
+            bb.utils.mkdirhier(os.path.dirname(sigfile))
 
         data = {}
         data['task'] = task
@@ -746,16 +747,26 @@
             ret.append(item)
     return '[%s]' % (', '.join(ret))
 
-def clean_basepath(a):
-    mc = None
-    if a.startswith("mc:"):
-        _, mc, a = a.split(":", 2)
-    b = a.rsplit("/", 2)[1] + '/' + a.rsplit("/", 2)[2]
-    if a.startswith("virtual:"):
-        b = b + ":" + a.rsplit(":", 2)[0]
-    if mc:
-        b = b + ":mc:" + mc
-    return b
+def clean_basepath(basepath):
+    basepath, dir, recipe_task = basepath.rsplit("/", 2)
+    cleaned = dir + '/' + recipe_task
+
+    if basepath[0] == '/':
+        return cleaned
+
+    if basepath.startswith("mc:"):
+        mc, mc_name, basepath = basepath.split(":", 2)
+        mc_suffix = ':mc:' + mc_name
+    else:
+        mc_suffix = ''
+
+    # mc stuff now removed from basepath. Whatever was next, if present will be the first
+    # suffix. ':/', recipe path start, marks the end of this. Something like
+    # 'virtual:a[:b[:c]]:/path...' (b and c being optional)
+    if basepath[0] != '/':
+        cleaned += ':' + basepath.split(':/', 1)[0]
+
+    return cleaned + mc_suffix
 
 def clean_basepaths(a):
     b = {}
diff --git a/poky/bitbake/lib/bb/tests/fetch.py b/poky/bitbake/lib/bb/tests/fetch.py
index 0ecf044..5a4db9c 100644
--- a/poky/bitbake/lib/bb/tests/fetch.py
+++ b/poky/bitbake/lib/bb/tests/fetch.py
@@ -223,6 +223,21 @@
             'query': {},
             'relative': False
         },
+        "git://tfs-example.org:22/tfs/example%20path/example.git": {
+            'uri': 'git://tfs-example.org:22/tfs/example%20path/example.git',
+            'scheme': 'git',
+            'hostname': 'tfs-example.org',
+            'port': 22,
+            'hostport': 'tfs-example.org:22',
+            'path': '/tfs/example path/example.git',
+            'userinfo': '',
+            'userinfo': '',
+            'username': '',
+            'password': '',
+            'params': {},
+            'query': {},
+            'relative': False
+        },
         "http://somesite.net;someparam=1": {
             'uri': 'http://somesite.net;someparam=1',
             'scheme': 'http',
@@ -584,6 +599,7 @@
         touch(os.path.join(self.localsrcdir, 'dir', 'd'))
         os.makedirs(os.path.join(self.localsrcdir, 'dir', 'subdir'))
         touch(os.path.join(self.localsrcdir, 'dir', 'subdir', 'e'))
+        touch(os.path.join(self.localsrcdir, r'backslash\x2dsystemd-unit.device'))
         self.d.setVar("FILESPATH", self.localsrcdir)
 
     def fetchUnpack(self, uris):
@@ -601,6 +617,10 @@
         tree = self.fetchUnpack(['file://a', 'file://dir/c'])
         self.assertEqual(tree, ['a', 'dir/c'])
 
+    def test_local_backslash(self):
+        tree = self.fetchUnpack([r'file://backslash\x2dsystemd-unit.device'])
+        self.assertEqual(tree, [r'backslash\x2dsystemd-unit.device'])
+
     def test_local_wildcard(self):
         with self.assertRaises(bb.fetch2.ParameterError):
             tree = self.fetchUnpack(['file://a', 'file://dir/*'])
@@ -2080,6 +2100,38 @@
         shutil.rmtree(self.gitdir, ignore_errors=True)
         fetcher.unpack(self.d.getVar('WORKDIR'))
 
+class GitURLWithSpacesTest(FetcherTest):
+    test_git_urls = {
+        "git://tfs-example.org:22/tfs/example%20path/example.git" : {
+            'url': 'git://tfs-example.org:22/tfs/example%20path/example.git',
+            'gitsrcname': 'tfs-example.org.22.tfs.example_path.example.git',
+            'path': '/tfs/example path/example.git'
+        },
+        "git://tfs-example.org:22/tfs/example%20path/example%20repo.git" : {
+            'url': 'git://tfs-example.org:22/tfs/example%20path/example%20repo.git',
+            'gitsrcname': 'tfs-example.org.22.tfs.example_path.example_repo.git',
+            'path': '/tfs/example path/example repo.git'
+        }
+    }
+
+    def test_urls(self):
+
+        # Set fake SRCREV to stop git fetcher from trying to contact non-existent git repo
+        self.d.setVar('SRCREV', '82ea737a0b42a8b53e11c9cde141e9e9c0bd8c40')
+
+        for test_git_url, ref in self.test_git_urls.items():
+
+            fetcher = bb.fetch.Fetch([test_git_url], self.d)
+            ud = fetcher.ud[fetcher.urls[0]]
+
+            self.assertEqual(ud.url, ref['url'])
+            self.assertEqual(ud.path, ref['path'])
+            self.assertEqual(ud.localfile, os.path.join(self.dldir, "git2", ref['gitsrcname']))
+            self.assertEqual(ud.localpath, os.path.join(self.dldir, "git2", ref['gitsrcname']))
+            self.assertEqual(ud.lockfile, os.path.join(self.dldir, "git2", ref['gitsrcname'] + '.lock'))
+            self.assertEqual(ud.clonedir, os.path.join(self.dldir, "git2", ref['gitsrcname']))
+            self.assertEqual(ud.fullmirror, os.path.join(self.dldir, "git2_" + ref['gitsrcname'] + '.tar.gz'))
+
 class NPMTest(FetcherTest):
     def skipIfNoNpm():
         import shutil
diff --git a/poky/bitbake/lib/bb/tests/siggen.py b/poky/bitbake/lib/bb/tests/siggen.py
new file mode 100644
index 0000000..c21ab4e
--- /dev/null
+++ b/poky/bitbake/lib/bb/tests/siggen.py
@@ -0,0 +1,91 @@
+#
+# BitBake Test for lib/bb/siggen.py
+#
+# Copyright (C) 2020 Jean-François Dagenais
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import unittest
+import logging
+import bb
+import time
+
+logger = logging.getLogger('BitBake.TestSiggen')
+
+import bb.siggen
+
+class SiggenTest(unittest.TestCase):
+
+    def test_clean_basepath_simple_target_basepath(self):
+        basepath = '/full/path/to/poky/meta/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask'
+        expected_cleaned = 'helloworld/helloworld_1.2.3.bb:do_sometask'
+
+        actual_cleaned = bb.siggen.clean_basepath(basepath)
+
+        self.assertEqual(actual_cleaned, expected_cleaned)
+
+    def test_clean_basepath_basic_virtual_basepath(self):
+        basepath = 'virtual:something:/full/path/to/poky/meta/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask'
+        expected_cleaned = 'helloworld/helloworld_1.2.3.bb:do_sometask:virtual:something'
+
+        actual_cleaned = bb.siggen.clean_basepath(basepath)
+
+        self.assertEqual(actual_cleaned, expected_cleaned)
+
+    def test_clean_basepath_mc_basepath(self):
+        basepath = 'mc:somemachine:/full/path/to/poky/meta/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask'
+        expected_cleaned = 'helloworld/helloworld_1.2.3.bb:do_sometask:mc:somemachine'
+
+        actual_cleaned = bb.siggen.clean_basepath(basepath)
+
+        self.assertEqual(actual_cleaned, expected_cleaned)
+
+    def test_clean_basepath_virtual_long_prefix_basepath(self):
+        basepath = 'virtual:something:A:B:C:/full/path/to/poky/meta/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask'
+        expected_cleaned = 'helloworld/helloworld_1.2.3.bb:do_sometask:virtual:something:A:B:C'
+
+        actual_cleaned = bb.siggen.clean_basepath(basepath)
+
+        self.assertEqual(actual_cleaned, expected_cleaned)
+
+    def test_clean_basepath_mc_virtual_basepath(self):
+        basepath = 'mc:somemachine:virtual:something:/full/path/to/poky/meta/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask'
+        expected_cleaned = 'helloworld/helloworld_1.2.3.bb:do_sometask:virtual:something:mc:somemachine'
+
+        actual_cleaned = bb.siggen.clean_basepath(basepath)
+
+        self.assertEqual(actual_cleaned, expected_cleaned)
+
+    def test_clean_basepath_mc_virtual_long_prefix_basepath(self):
+        basepath = 'mc:X:virtual:something:C:B:A:/full/path/to/poky/meta/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask'
+        expected_cleaned = 'helloworld/helloworld_1.2.3.bb:do_sometask:virtual:something:C:B:A:mc:X'
+
+        actual_cleaned = bb.siggen.clean_basepath(basepath)
+
+        self.assertEqual(actual_cleaned, expected_cleaned)
+
+
+    # def test_clean_basepath_performance(self):
+    #     input_basepaths = [
+    #         'mc:X:/full/path/to/poky/meta/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask',
+    #         'mc:X:virtual:something:C:B:A:/full/path/to/poky/meta/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask',
+    #         'virtual:something:C:B:A:/different/path/to/poky/meta/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask',
+    #         'virtual:something:A:/full/path/to/poky/meta/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask',
+    #         '/this/is/most/common/input/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask',
+    #         '/and/should/be/tested/with/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask',
+    #         '/more/weight/recipes-whatever/helloworld/helloworld_1.2.3.bb:do_sometask',
+    #     ]
+
+    #     time_start = time.time()
+
+    #     i = 2000000
+    #     while i >= 0:
+    #         for basepath in input_basepaths:
+    #             bb.siggen.clean_basepath(basepath)
+    #         i -= 1
+
+    #     elapsed = time.time() - time_start
+    #     print('{} ({}s)'.format(self.id(), round(elapsed, 3)))
+
+    #     self.assertTrue(False)
diff --git a/poky/bitbake/lib/bb/ui/taskexp.py b/poky/bitbake/lib/bb/ui/taskexp.py
index 05e3233..2b24671 100644
--- a/poky/bitbake/lib/bb/ui/taskexp.py
+++ b/poky/bitbake/lib/bb/ui/taskexp.py
@@ -58,7 +58,12 @@
         self.current = None
         self.filter_model = model.filter_new()
         self.filter_model.set_visible_func(self._filter)
-        self.sort_model = self.filter_model.sort_new_with_model()
+        # The introspected API was fixed but we can't rely on a pygobject that hides this.
+        # https://gitlab.gnome.org/GNOME/pygobject/-/commit/9cdbc56fbac4db2de78dc080934b8f0a7efc892a
+        if hasattr(Gtk.TreeModelSort, "new_with_model"):
+            self.sort_model = Gtk.TreeModelSort.new_with_model(self.filter_model)
+        else:
+            self.sort_model = self.filter_model.sort_new_with_model()
         self.sort_model.set_sort_column_id(COL_DEP_PARENT, Gtk.SortType.ASCENDING)
         self.set_model(self.sort_model)
         self.append_column(Gtk.TreeViewColumn(label, Gtk.CellRendererText(), text=COL_DEP_PARENT))
diff --git a/poky/bitbake/lib/bb/utils.py b/poky/bitbake/lib/bb/utils.py
index 0b79f92..f73d31f 100644
--- a/poky/bitbake/lib/bb/utils.py
+++ b/poky/bitbake/lib/bb/utils.py
@@ -944,6 +944,17 @@
         return "", hist
     return ""
 
+@contextmanager
+def umask(new_mask):
+    """
+    Context manager to set the umask to a specific mask, and restore it afterwards.
+    """
+    current_mask = os.umask(new_mask)
+    try:
+        yield
+    finally:
+        os.umask(current_mask)
+
 def to_boolean(string, default=None):
     if not string:
         return default
diff --git a/poky/bitbake/lib/hashserv/tests.py b/poky/bitbake/lib/hashserv/tests.py
index b34c436..4566f24 100644
--- a/poky/bitbake/lib/hashserv/tests.py
+++ b/poky/bitbake/lib/hashserv/tests.py
@@ -14,6 +14,7 @@
 import tempfile
 import threading
 import unittest
+import socket
 
 
 class TestHashEquivalenceServer(object):
@@ -163,4 +164,8 @@
 
 class TestHashEquivalenceTCPServer(TestHashEquivalenceServer, unittest.TestCase):
     def get_server_addr(self):
-        return "localhost:0"
+        # Some hosts cause asyncio module to misbehave, when IPv6 is not enabled.
+        # If IPv6 is enabled, it should be safe to use localhost directly, in general
+        # case it is more reliable to resolve the IP address explicitly.
+        return socket.gethostbyname("localhost") + ":0"
+