@@ -245,6 +245,65 @@ TEST_F(enclave, unclobbered_vdso)
EXPECT_EQ(self->run.user_data, 0);
}
+static bool sysfs_get_ulong(const char *path, unsigned long *value)
+{
+ struct stat sbuf;
+ char buf[128];
+ ssize_t ret;
+ int fd;
+
+ ret = stat(path, &sbuf);
+ if (ret)
+ return false;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return false;
+
+ ret = read(fd, buf, sizeof(buf));
+ if (ret < 0) {
+ close(fd);
+ return false;
+ }
+
+ errno = 0;
+ *value = strtoul(buf, NULL, 0);
+
+ close(fd);
+
+ return errno ? false : true;
+}
+
+TEST_F(enclave, unclobbered_vdso_oversubscribed)
+{
+ unsigned long total_mem;
+ struct encl_op op;
+
+ ASSERT_TRUE(sysfs_get_ulong(SGX_TOTAL_MEM_PATH, &total_mem));
+ ASSERT_TRUE(setup_test_encl(total_mem, &self->encl, _metadata));
+
+ memset(&self->run, 0, sizeof(self->run));
+ self->run.tcs = self->encl.encl_base;
+
+ op.type = ENCL_OP_PUT;
+ op.buffer = MAGIC;
+
+ EXPECT_EQ(ENCL_CALL(&op, &self->run, false), 0);
+
+ EXPECT_EEXIT(&self->run);
+ EXPECT_EQ(self->run.user_data, 0);
+
+ op.type = ENCL_OP_GET;
+ op.buffer = 0;
+
+ EXPECT_EQ(ENCL_CALL(&op, &self->run, false), 0);
+
+ EXPECT_EQ(op.buffer, MAGIC);
+ EXPECT_EEXIT(&self->run);
+ EXPECT_EQ(self->run.user_data, 0);
+
+}
+
TEST_F(enclave, clobbered_vdso)
{
struct encl_op op;
@@ -7,6 +7,7 @@
#define MAIN_H
#define ENCL_HEAP_SIZE_DEFAULT 4096
+#define SGX_TOTAL_MEM_PATH "/sys/kernel/debug/x86/sgx_total_mem"
struct encl_segment {
void *src;
Add a variation of the unclobbered_vdso test. In the new test, create a heap for the test enclave, which has the same size as all available Enclave Page Cache (EPC) pages in the system. This will guarantee that all test_encl.elf pages *and* SGX Enclave Control Structure (SECS) have been swapped out by the page reclaimer during the load time.. This test will trigger both the page reclaimer and the page fault handler. The page reclaimer triggered, while the heap is being created during the load time. The page fault handler is triggered for all the required pages, while the test case is executing. Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org> --- v4: * Wrap setup_test_encl() and get_sysfs_long() with ASSERT_TRUE(). tools/testing/selftests/sgx/main.c | 59 ++++++++++++++++++++++++++++++ tools/testing/selftests/sgx/main.h | 1 + 2 files changed, 60 insertions(+)