* [LTP] RFC:[PATCH v1] Added test case to test mmap with MAP_SHARED_VALIDATE flag
@ 2020-10-05 8:55 Paulson Raja L
2020-10-14 9:33 ` Cyril Hrubis
0 siblings, 1 reply; 2+ messages in thread
From: Paulson Raja L @ 2020-10-05 8:55 UTC (permalink / raw)
To: ltp
This patch adds a new test case for the mmap syscall. It tests the
MAP_SHARED_VALIDATE flag of mmap. The code checks if MAP_SHARED_VALIDATE
returns EOPNOTSUPP when mapped with an invalid flag value. It does so by
setting the unused bits of the flag argument.
Git Hub Issue link - https://github.com/linux-test-project/ltp/issues/298
Signed-off-by: Paulson Raja L. <paulson@zilogic.com>
Reviewed-by: Vijay Kumar B. <vijaykumar@zilogic.com>
---
testcases/kernel/syscalls/mmap/mmap18.c | 66 +++++++++++++++++++++++++
1 file changed, 66 insertions(+)
create mode 100644 testcases/kernel/syscalls/mmap/mmap18.c
diff --git a/testcases/kernel/syscalls/mmap/mmap18.c b/testcases/kernel/syscalls/mmap/mmap18.c
new file mode 100644
index 000000000..e9ed4dfa6
--- /dev/null
+++ b/testcases/kernel/syscalls/mmap/mmap18.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) Zilogic Systems Pvt. Ltd., 2020
+ * Email: code@zilogic.com
+ */
+
+/*
+ * Test mmap with MAP_SHARED_VALIDATE flag
+ *
+ * We are testing the MAP_SHARED_VALIDATE flag of mmap() syscall. To check
+ * if there is an invalid flag value, the MAP_SHARED_VALIDATE returns
+ * EOPNOTSUPP.The unused bits in the MAP_SHARED_VALIDATE is found,
+ * and by setting the unused bits of the flag argument the flag value
+ * becomes invalid and the error EOPNOTSUPP is produced as expected.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <linux/mman.h>
+#include <errno.h>
+#include "tst_test.h"
+
+#define TEST_FILE "file_to_mmap"
+#define TEST_FILE_SIZE 1024
+#define TEST_FILE_MODE 0600
+
+static int fd_file;
+static void *mapped_address;
+
+static void setup(void)
+{
+ fd_file = SAFE_OPEN(TEST_FILE, O_CREAT | O_RDWR, TEST_FILE_MODE);
+ if (tst_fill_file(TEST_FILE, 'a', TEST_FILE_SIZE, 1))
+ tst_brk(TBROK, "Could not fill Testfile !");
+}
+
+static void cleanup(void)
+{
+ if (fd_file > 0)
+ SAFE_CLOSE(fd_file);
+ if (mapped_address != MAP_FAILED && mapped_address != NULL)
+ SAFE_MUNMAP(mapped_address, TEST_FILE_SIZE);
+}
+
+static void test_mmap(void)
+{
+ mapped_address = mmap(NULL, TEST_FILE_SIZE, PROT_READ | PROT_WRITE,
+ (1 << 7) | (1 << 9) | MAP_SHARED_VALIDATE, fd_file, 0);
+ if (mapped_address != MAP_FAILED)
+ tst_res(TFAIL | TERRNO, "mmap() is successful,but it should have failed");
+ else if (errno == EOPNOTSUPP)
+ tst_res(TPASS, "mmap() failed with errno set to EOPNOTSUPP");
+ else
+ tst_res(TFAIL | TERRNO, "mmap() failed with the unexpected error");
+}
+
+static struct tst_test test = {
+ .setup = setup,
+ .cleanup = cleanup,
+ .test_all = test_mmap,
+ .min_kver = "4.15",
+ .needs_tmpdir = 1,
+};
--
2.20.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [LTP] RFC:[PATCH v1] Added test case to test mmap with MAP_SHARED_VALIDATE flag
2020-10-05 8:55 [LTP] RFC:[PATCH v1] Added test case to test mmap with MAP_SHARED_VALIDATE flag Paulson Raja L
@ 2020-10-14 9:33 ` Cyril Hrubis
0 siblings, 0 replies; 2+ messages in thread
From: Cyril Hrubis @ 2020-10-14 9:33 UTC (permalink / raw)
To: ltp
Hi!
> This patch adds a new test case for the mmap syscall. It tests the
> MAP_SHARED_VALIDATE flag of mmap. The code checks if MAP_SHARED_VALIDATE
> returns EOPNOTSUPP when mapped with an invalid flag value. It does so by
> setting the unused bits of the flag argument.
> Git Hub Issue link - https://github.com/linux-test-project/ltp/issues/298
>
> Signed-off-by: Paulson Raja L. <paulson@zilogic.com>
> Reviewed-by: Vijay Kumar B. <vijaykumar@zilogic.com>
>
> ---
> testcases/kernel/syscalls/mmap/mmap18.c | 66 +++++++++++++++++++++++++
> 1 file changed, 66 insertions(+)
> create mode 100644 testcases/kernel/syscalls/mmap/mmap18.c
>
> diff --git a/testcases/kernel/syscalls/mmap/mmap18.c b/testcases/kernel/syscalls/mmap/mmap18.c
> new file mode 100644
> index 000000000..e9ed4dfa6
> --- /dev/null
> +++ b/testcases/kernel/syscalls/mmap/mmap18.c
> @@ -0,0 +1,66 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (c) Zilogic Systems Pvt. Ltd., 2020
> + * Email: code@zilogic.com
> + */
> +
> +/*
> + * Test mmap with MAP_SHARED_VALIDATE flag
> + *
> + * We are testing the MAP_SHARED_VALIDATE flag of mmap() syscall. To check
> + * if there is an invalid flag value, the MAP_SHARED_VALIDATE returns
> + * EOPNOTSUPP.The unused bits in the MAP_SHARED_VALIDATE is found,
> + * and by setting the unused bits of the flag argument the flag value
> + * becomes invalid and the error EOPNOTSUPP is produced as expected.
> + */
> +
> +#include <sys/types.h>
> +#include <sys/stat.h>
> +#include <fcntl.h>
> +#include <unistd.h>
> +#include <sys/mman.h>
> +#include <linux/mman.h>
> +#include <errno.h>
> +#include "tst_test.h"
> +
> +#define TEST_FILE "file_to_mmap"
> +#define TEST_FILE_SIZE 1024
> +#define TEST_FILE_MODE 0600
> +
> +static int fd_file;
> +static void *mapped_address;
> +
> +static void setup(void)
> +{
> + fd_file = SAFE_OPEN(TEST_FILE, O_CREAT | O_RDWR, TEST_FILE_MODE);
> + if (tst_fill_file(TEST_FILE, 'a', TEST_FILE_SIZE, 1))
> + tst_brk(TBROK, "Could not fill Testfile !");
> +}
> +
> +static void cleanup(void)
> +{
> + if (fd_file > 0)
> + SAFE_CLOSE(fd_file);
> + if (mapped_address != MAP_FAILED && mapped_address != NULL)
> + SAFE_MUNMAP(mapped_address, TEST_FILE_SIZE);
> +}
> +
> +static void test_mmap(void)
> +{
> + mapped_address = mmap(NULL, TEST_FILE_SIZE, PROT_READ | PROT_WRITE,
> + (1 << 7) | (1 << 9) | MAP_SHARED_VALIDATE, fd_file, 0);
Can't we just pass MAP_ANONYMOUS here instead of having a backing file
for the mapping?
> + if (mapped_address != MAP_FAILED)
> + tst_res(TFAIL | TERRNO, "mmap() is successful,but it should have failed");
> + else if (errno == EOPNOTSUPP)
> + tst_res(TPASS, "mmap() failed with errno set to EOPNOTSUPP");
> + else
> + tst_res(TFAIL | TERRNO, "mmap() failed with the unexpected error");
> +}
> +
> +static struct tst_test test = {
> + .setup = setup,
> + .cleanup = cleanup,
> + .test_all = test_mmap,
> + .min_kver = "4.15",
> + .needs_tmpdir = 1,
> +};
> --
> 2.20.1
>
>
> --
> Mailing list info: https://lists.linux.it/listinfo/ltp
--
Cyril Hrubis
chrubis@suse.cz
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2020-10-05 8:55 [LTP] RFC:[PATCH v1] Added test case to test mmap with MAP_SHARED_VALIDATE flag Paulson Raja L
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