syzkaller reported a KMSAN splat in __unix_walk_scc() while backtracking
edge_stack after finalising SCC.
Let's add a test case exercising the path.
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Shigeru Yoshida <syoshida@redhat.com>
Link: https://patch.msgid.link/20240702160428.10153-2-syoshida@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
FIXTURE(scm_rights)
{
- int fd[16];
+ int fd[32];
};
FIXTURE_VARIANT(scm_rights)
{
- char name[16];
+ char name[32];
int type;
int flags;
bool test_listener;
const FIXTURE_VARIANT(scm_rights) *variant,
int n)
{
+ ASSERT_LE(n * 2, sizeof(self->fd) / sizeof(self->fd[0]));
+
if (variant->test_listener)
create_listeners(_metadata, self, n);
else
close_sockets(8);
}
+TEST_F(scm_rights, backtrack_from_scc)
+{
+ create_sockets(10);
+
+ send_fd(0, 1);
+ send_fd(0, 4);
+ send_fd(1, 2);
+ send_fd(2, 3);
+ send_fd(3, 1);
+
+ send_fd(5, 6);
+ send_fd(5, 9);
+ send_fd(6, 7);
+ send_fd(7, 8);
+ send_fd(8, 6);
+
+ close_sockets(10);
+}
+
TEST_HARNESS_MAIN