oeqa/selftest: add test for git working correctly inside pseudo

The fix for CVE-2022-24765 in git[1] breaks any use of git inside
pseudo. Add a simple test case to oe-selftest to verify that at least
basic uses of git work fine under pseudo.

[1] https://github.com/git/git/commit/8959555cee7ec045958f9b6dd62e541affb7e7d9

(From OE-Core rev: 46822268040a23dbb81f71fe35aee8c2663a31f6)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-selftest/recipes-test/git-submodule-test/git-submodule-test.bb

@@ -7,3 +7,18 @@ INHIBIT_DEFAULT_DEPS = "1"
 
 SRC_URI = "gitsm://git.yoctoproject.org/git-submodule-test;branch=master"
 SRCREV = "a2885dd7d25380d23627e7544b7bbb55014b16ee"
+
+S = "${WORKDIR}/git"
+
+do_test_git_as_user() {
+    cd ${S}
+    git status
+}
+addtask test_git_as_user after do_unpack
+
+fakeroot do_test_git_as_root() {
+    cd ${S}
+    git status
+}
+do_test_git_as_root[depends] += "virtual/fakeroot-native:do_populate_sysroot"
+addtask test_git_as_root after do_unpack

meta/lib/oeqa/selftest/cases/git.py

@@ -0,0 +1,15 @@
+from oeqa.selftest.case import OESelftestTestCase
+from oeqa.utils.commands import bitbake
+
+class GitCheck(OESelftestTestCase):
+    def test_git_intercept(self):
+        """
+        Git binaries with CVE-2022-24765 fixed will refuse to operate on a
+        repository which is owned by a different user. This breaks our
+        do_install task as that runs inside pseudo, so the git repository is
+        owned by the build user but git is running as (fake)root.
+
+        We have an intercept which disables pseudo, so verify that it works.
+        """
+        bitbake("git-submodule-test -c test_git_as_user")
+        bitbake("git-submodule-test -c test_git_as_root")