1 files changed, 78 insertions, 0 deletions
diff --git a/t/t7415-submodule-names.sh b/t/t7415-submodule-names.sh
index 75fa071c6d..a770d92a55 100755
--- a/t/t7415-submodule-names.sh
+++ b/t/t7415-submodule-names.sh
@@ -6,6 +6,7 @@ Exercise the name-checking function on a variety of names, and then give a
 real-world setup that confirms we catch this in practice.
 '
 . ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-pack.sh
 
 test_expect_success 'check names' '
 	cat >expect <<-\EOF &&
@@ -73,4 +74,81 @@ test_expect_success 'clone evil superproject' '
 	! grep "RUNNING POST CHECKOUT" output
 '
 
+test_expect_success 'fsck detects evil superproject' '
+	test_must_fail git fsck
+'
+
+test_expect_success 'transfer.fsckObjects detects evil superproject (unpack)' '
+	rm -rf dst.git &&
+	git init --bare dst.git &&
+	git -C dst.git config transfer.fsckObjects true &&
+	test_must_fail git push dst.git HEAD
+'
+
+test_expect_success 'transfer.fsckObjects detects evil superproject (index)' '
+	rm -rf dst.git &&
+	git init --bare dst.git &&
+	git -C dst.git config transfer.fsckObjects true &&
+	git -C dst.git config transfer.unpackLimit 1 &&
+	test_must_fail git push dst.git HEAD
+'
+
+# Normally our packs contain commits followed by trees followed by blobs. This
+# reverses the order, which requires backtracking to find the context of a
+# blob. We'll start with a fresh gitmodules-only tree to make it simpler.
+test_expect_success 'create oddly ordered pack' '
+	git checkout --orphan odd &&
+	git rm -rf --cached . &&
+	git add .gitmodules &&
+	git commit -m odd &&
+	{
+		pack_header 3 &&
+		pack_obj $(git rev-parse HEAD:.gitmodules) &&
+		pack_obj $(git rev-parse HEAD^{tree}) &&
+		pack_obj $(git rev-parse HEAD)
+	} >odd.pack &&
+	pack_trailer odd.pack
+'
+
+test_expect_success 'transfer.fsckObjects handles odd pack (unpack)' '
+	rm -rf dst.git &&
+	git init --bare dst.git &&
+	test_must_fail git -C dst.git unpack-objects --strict <odd.pack
+'
+
+test_expect_success 'transfer.fsckObjects handles odd pack (index)' '
+	rm -rf dst.git &&
+	git init --bare dst.git &&
+	test_must_fail git -C dst.git index-pack --strict --stdin <odd.pack
+'
+
+test_expect_success 'fsck detects symlinked .gitmodules file' '
+	git init symlink &&
+	(
+		cd symlink &&
+
+		# Make the tree directly to avoid index restrictions.
+		#
+		# Because symlinks store the target as a blob, choose
+		# a pathname that could be parsed as a .gitmodules file
+		# to trick naive non-symlink-aware checking.
+		tricky="[foo]bar=true" &&
+		content=$(git hash-object -w ../.gitmodules) &&
+		target=$(printf "$tricky" | git hash-object -w --stdin) &&
+		tree=$(
+			{
+				printf "100644 blob $content\t$tricky\n" &&
+				printf "120000 blob $target\t.gitmodules\n"
+			} | git mktree
+		) &&
+		commit=$(git commit-tree $tree) &&
+
+		# Check not only that we fail, but that it is due to the
+		# symlink detector; this grep string comes from the config
+		# variable name and will not be translated.
+		test_must_fail git fsck 2>output &&
+		grep gitmodulesSymlink output
+	)
+'
+
 test_done