1 files changed, 154 insertions, 0 deletions
diff --git a/t/t4122-apply-symlink-inside.sh b/t/t4122-apply-symlink-inside.sh
new file mode 100755
index 0000000000..4acb3f336e
--- /dev/null
+++ b/t/t4122-apply-symlink-inside.sh
@@ -0,0 +1,154 @@
+#!/bin/sh
+
+test_description='apply to deeper directory without getting fooled with symlink'
+. ./test-lib.sh
+
+test_expect_success setup '
+
+	mkdir -p arch/i386/boot arch/x86_64 &&
+	test_write_lines 1 2 3 4 5 >arch/i386/boot/Makefile &&
+	test_ln_s_add ../i386/boot arch/x86_64/boot &&
+	git add . &&
+	test_tick &&
+	git commit -m initial &&
+	git branch test &&
+
+	rm arch/x86_64/boot &&
+	mkdir arch/x86_64/boot &&
+	test_write_lines 2 3 4 5 6 >arch/x86_64/boot/Makefile &&
+	git add . &&
+	test_tick &&
+	git commit -a -m second &&
+
+	git format-patch --binary -1 --stdout >test.patch
+
+'
+
+test_expect_success apply '
+
+	git checkout test &&
+	git diff --exit-code test &&
+	git diff --exit-code --cached test &&
+	git apply --index test.patch
+
+'
+
+test_expect_success 'check result' '
+
+	git diff --exit-code master &&
+	git diff --exit-code --cached master &&
+	test_tick &&
+	git commit -m replay &&
+	T1=$(git rev-parse "master^{tree}") &&
+	T2=$(git rev-parse "HEAD^{tree}") &&
+	test "z$T1" = "z$T2"
+
+'
+
+test_expect_success SYMLINKS 'do not read from beyond symbolic link' '
+	git reset --hard &&
+	mkdir -p arch/x86_64/dir &&
+	>arch/x86_64/dir/file &&
+	git add arch/x86_64/dir/file &&
+	echo line >arch/x86_64/dir/file &&
+	git diff >patch &&
+	git reset --hard &&
+
+	mkdir arch/i386/dir &&
+	>arch/i386/dir/file &&
+	ln -s ../i386/dir arch/x86_64/dir &&
+
+	test_must_fail git apply patch &&
+	test_must_fail git apply --cached patch &&
+	test_must_fail git apply --index patch
+
+'
+
+test_expect_success SYMLINKS 'do not follow symbolic link (setup)' '
+
+	rm -rf arch/i386/dir arch/x86_64/dir &&
+	git reset --hard &&
+	ln -s ../i386/dir arch/x86_64/dir &&
+	git add arch/x86_64/dir &&
+	git diff HEAD >add_symlink.patch &&
+	git reset --hard &&
+
+	mkdir arch/x86_64/dir &&
+	>arch/x86_64/dir/file &&
+	git add arch/x86_64/dir/file &&
+	git diff HEAD >add_file.patch &&
+	git diff -R HEAD >del_file.patch &&
+	git reset --hard &&
+	rm -fr arch/x86_64/dir &&
+
+	cat add_symlink.patch add_file.patch >patch &&
+	cat add_symlink.patch del_file.patch >tricky_del &&
+
+	mkdir arch/i386/dir
+'
+
+test_expect_success SYMLINKS 'do not follow symbolic link (same input)' '
+
+	# same input creates a confusing symbolic link
+	test_must_fail git apply patch 2>error-wt &&
+	test_i18ngrep "beyond a symbolic link" error-wt &&
+	test_path_is_missing arch/x86_64/dir &&
+	test_path_is_missing arch/i386/dir/file &&
+
+	test_must_fail git apply --index patch 2>error-ix &&
+	test_i18ngrep "beyond a symbolic link" error-ix &&
+	test_path_is_missing arch/x86_64/dir &&
+	test_path_is_missing arch/i386/dir/file &&
+	test_must_fail git ls-files --error-unmatch arch/x86_64/dir &&
+	test_must_fail git ls-files --error-unmatch arch/i386/dir &&
+
+	test_must_fail git apply --cached patch 2>error-ct &&
+	test_i18ngrep "beyond a symbolic link" error-ct &&
+	test_must_fail git ls-files --error-unmatch arch/x86_64/dir &&
+	test_must_fail git ls-files --error-unmatch arch/i386/dir &&
+
+	>arch/i386/dir/file &&
+	git add arch/i386/dir/file &&
+
+	test_must_fail git apply tricky_del &&
+	test_path_is_file arch/i386/dir/file &&
+
+	test_must_fail git apply --index tricky_del &&
+	test_path_is_file arch/i386/dir/file &&
+	test_must_fail git ls-files --error-unmatch arch/x86_64/dir &&
+	git ls-files --error-unmatch arch/i386/dir &&
+
+	test_must_fail git apply --cached tricky_del &&
+	test_must_fail git ls-files --error-unmatch arch/x86_64/dir &&
+	git ls-files --error-unmatch arch/i386/dir
+'
+
+test_expect_success SYMLINKS 'do not follow symbolic link (existing)' '
+
+	# existing symbolic link
+	git reset --hard &&
+	ln -s ../i386/dir arch/x86_64/dir &&
+	git add arch/x86_64/dir &&
+
+	test_must_fail git apply add_file.patch 2>error-wt-add &&
+	test_i18ngrep "beyond a symbolic link" error-wt-add &&
+	test_path_is_missing arch/i386/dir/file &&
+
+	mkdir arch/i386/dir &&
+	>arch/i386/dir/file &&
+	test_must_fail git apply del_file.patch 2>error-wt-del &&
+	test_i18ngrep "beyond a symbolic link" error-wt-del &&
+	test_path_is_file arch/i386/dir/file &&
+	rm arch/i386/dir/file &&
+
+	test_must_fail git apply --index add_file.patch 2>error-ix-add &&
+	test_i18ngrep "beyond a symbolic link" error-ix-add &&
+	test_path_is_missing arch/i386/dir/file &&
+	test_must_fail git ls-files --error-unmatch arch/i386/dir &&
+
+	test_must_fail git apply --cached add_file.patch 2>error-ct-file &&
+	test_i18ngrep "beyond a symbolic link" error-ct-file &&
+	test_must_fail git ls-files --error-unmatch arch/i386/dir
+'
+
+test_done