testsuite: Add test to check if modprobe explodes on bogus config

Put this one /etc/modprobe.d/bougs.conf:

alias psmouse deaddood

`modprobe --show-depends --quiet psmouse` explodes in an assertion
(unless you have a module named deaddood). Some people and initrd's use
"alias psmouse off" to disable a module instead of blacklisting it or
adding a install rule.

Add a test with expected_fail == true before fixing this.

14 files changed, 36 insertions, 0 deletions

diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/correct-psmouse.txt b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/correct-psmouse.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/correct-psmouse.txt
diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/etc/modprobe.d/bogus.conf b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/etc/modprobe.d/bogus.conf
new file mode 100644
index 0000000..14bed0b
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/etc/modprobe.d/bogus.conf
@@ -0,0 +1 @@
+alias psmouse deaddood
diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/kernel/drivers/input/mouse/psmouse.ko b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/kernel/drivers/input/mouse/psmouse.ko
new file mode 100644
index 0000000..4eac2a3
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/kernel/drivers/input/mouse/psmouse.ko
diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.alias b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.alias
new file mode 100644
index 0000000..a4e7677
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.alias
@@ -0,0 +1,3 @@
+# Aliases extracted from modules themselves.
+alias serio:ty05pr*id*ex* psmouse
+alias serio:ty01pr*id*ex* psmouse
diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.alias.bin b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.alias.bin
new file mode 100644
index 0000000..0b13537
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.alias.bin
diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.builtin.bin b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.builtin.bin
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.builtin.bin
diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.dep b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.dep
new file mode 100644
index 0000000..7ba5711
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.dep
@@ -0,0 +1 @@
+kernel/drivers/input/mouse/psmouse.ko:
diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.dep.bin b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.dep.bin
new file mode 100644
index 0000000..bdd0eb5
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.dep.bin
diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.devname b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.devname
new file mode 100644
index 0000000..58f6d6d
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.devname
@@ -0,0 +1 @@
+# Device nodes to trigger on-demand module loading.
diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.softdep b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.softdep
new file mode 100644
index 0000000..3cc0512
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.softdep
@@ -0,0 +1,2 @@
+# Soft dependencies extracted from modules themselves.
+# Copy, with a .conf extension, to /etc/modprobe.d to use it with modprobe.
diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.symbols b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.symbols
new file mode 100644
index 0000000..618c345
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.symbols
@@ -0,0 +1 @@
+# Aliases for symbols, used by symbol_request().
diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.symbols.bin b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.symbols.bin
new file mode 100644
index 0000000..7075435
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/lib/modules/4.4.4/modules.symbols.bin
diff --git a/testsuite/rootfs-pristine/test-modprobe/alias-to-none/proc/modules b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/proc/modules
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modprobe/alias-to-none/proc/modules
diff --git a/testsuite/test-modprobe.c b/testsuite/test-modprobe.c
index d598cfd..775a995 100644
--- a/testsuite/test-modprobe.c
+++ b/testsuite/test-modprobe.c
@@ -70,6 +70,31 @@ static DEFINE_TEST(modprobe_show_depends2,
 		.stdout = TESTSUITE_ROOTFS "test-modprobe/show-depends/correct-psmouse.txt",
 	});
 
+
+static __noreturn int modprobe_show_alias_to_none(const struct test *t)
+{
+	const char *progname = ABS_TOP_BUILDDIR "/tools/modprobe";
+	const char *const args[] = {
+		progname,
+		"--show-depends", "--ignore-install", "--quiet", "psmouse",
+		NULL,
+	};
+
+	test_spawn_prog(progname, args);
+	exit(EXIT_FAILURE);
+}
+static DEFINE_TEST(modprobe_show_alias_to_none,
+	.description = "check if modprobe --show-depends doesn't explode with an alias to nothing",
+	.expected_fail = true,
+	.config = {
+		[TC_UNAME_R] = "4.4.4",
+		[TC_ROOTFS] = TESTSUITE_ROOTFS "test-modprobe/alias-to-none",
+	},
+	.output = {
+		.stdout = TESTSUITE_ROOTFS "test-modprobe/show-depends/correct-psmouse.txt",
+	});
+
+
 static __noreturn int modprobe_builtin(const struct test *t)
 {
 	const char *progname = ABS_TOP_BUILDDIR "/tools/modprobe";
@@ -134,9 +159,11 @@ static DEFINE_TEST(modprobe_install_cmd_loop,
 		},
 	);
 
+
 static const struct test *tests[] = {
 	&smodprobe_show_depends,
 	&smodprobe_show_depends2,
+	&smodprobe_show_alias_to_none,
 	&smodprobe_builtin,
 	&smodprobe_softdep_loop,
 	&smodprobe_install_cmd_loop,