Add EPERM and ENOMEM errno tests for mlock(2).
Signed-off-by: Zeng Linggang <[email protected]>
---
testcases/kernel/syscalls/mlock/mlock02.c | 82 ++++++++++++++++++++++++++++++-
1 file changed, 80 insertions(+), 2 deletions(-)
diff --git a/testcases/kernel/syscalls/mlock/mlock02.c
b/testcases/kernel/syscalls/mlock/mlock02.c
index 95c499d..bfed030 100644
--- a/testcases/kernel/syscalls/mlock/mlock02.c
+++ b/testcases/kernel/syscalls/mlock/mlock02.c
@@ -23,11 +23,20 @@
* 1. mlock() fails with -1 return value and sets errno to ENOMEM,
* if some of the specified address range does not correspond to
* mapped pages in the address space of the process.
+ * 2. mlock() fails with -1 return value and sets errno to ENOMEM,
+ * if (Linux 2.6.9 and later) the caller had a non-zero RLIMIT_MEMLOCK
+ * soft resource limit, but tried to lock more memory than the limit
+ * permitted. This limit is not enforced if the process is privileged
+ * (CAP_IPC_LOCK).
+ * 3. mlock() fails with -1 return value and sets errno to EPERM,
+ * if (Linux 2.6.9 and later) the caller was not privileged (CAP_IPC_LOCK)
+ * and its RLIMIT_MEMLOCK soft resource limit was 0.
*/
#include <errno.h>
#include <unistd.h>
#include <sys/mman.h>
+#include <pwd.h>
#include "test.h"
#include "usctest.h"
@@ -40,14 +49,18 @@ char *TCID = "mlock02";
static void setup(void);
static void cleanup(void);
static void test_enomem1(void);
+static void test_enomem2(void);
+static void test_eperm(void);
static void mlock_verify(const void *, const size_t, const int);
static size_t len;
+static struct rlimit original;
+static struct passwd *ltpuser;
-static void (*test_func[])(void) = { test_enomem1 };
+static void (*test_func[])(void) = { test_enomem1, test_enomem2, test_eperm };
int TST_TOTAL = ARRAY_SIZE(test_func);
-static int exp_enos[] = { ENOMEM, 0 };
+static int exp_enos[] = { ENOMEM, EPERM, 0 };
int main(int ac, char **av)
{
@@ -73,11 +86,17 @@ int main(int ac, char **av)
static void setup(void)
{
+ tst_require_root(NULL);
+
tst_sig(NOFORK, DEF_HANDLER, cleanup);
TEST_PAUSE;
+ ltpuser = SAFE_GETPWNAM(cleanup, "nobody");
+
len = getpagesize();
+
+ SAFE_GETRLIMIT(cleanup, RLIMIT_MEMLOCK, &original);
}
static void test_enomem1(void)
@@ -111,6 +130,65 @@ static void test_enomem1(void)
mlock_verify(addr, len, ENOMEM);
}
+static void test_enomem2(void)
+{
+ void *addr;
+ struct rlimit rl;
+
+ if ((tst_kvercmp(2, 6, 9)) < 0) {
+ tst_resm(TCONF,
+ "ENOMEM error value test for this condition needs "
+ "kernel 2.6.9 or higher");
+ return;
+ }
+
+ rl.rlim_max = len - 1;
+ rl.rlim_cur = len - 1;
+ SAFE_SETRLIMIT(cleanup, RLIMIT_MEMLOCK, &rl);
+
+ addr = SAFE_MMAP(cleanup, NULL, len, PROT_READ,
+ MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
+
+ SAFE_SETEUID(cleanup, ltpuser->pw_uid);
+
+ mlock_verify(addr, len, ENOMEM);
+
+ SAFE_SETEUID(cleanup, 0);
+
+ SAFE_MUNMAP(cleanup, addr, len);
+
+ SAFE_SETRLIMIT(cleanup, RLIMIT_MEMLOCK, &original);
+}
+
+static void test_eperm(void)
+{
+ void *addr;
+ struct rlimit rl;
+
+ if ((tst_kvercmp(2, 6, 9)) < 0) {
+ tst_resm(TCONF,
+ "EPERM error value test needs kernel 2.6.9 or higher");
+ return;
+ }
+
+ rl.rlim_max = 0;
+ rl.rlim_cur = 0;
+ SAFE_SETRLIMIT(cleanup, RLIMIT_MEMLOCK, &rl);
+
+ addr = SAFE_MMAP(cleanup, NULL, len, PROT_READ,
+ MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
+
+ SAFE_SETEUID(cleanup, ltpuser->pw_uid);
+
+ mlock_verify(addr, len, EPERM);
+
+ SAFE_SETEUID(cleanup, 0);
+
+ SAFE_MUNMAP(cleanup, addr, len);
+
+ SAFE_SETRLIMIT(cleanup, RLIMIT_MEMLOCK, &original);
+}
+
static void mlock_verify(const void *addr, const size_t len, const int error)
{
TEST(mlock(addr, len));
--
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