lsm: use 32-bit compatible data types in LSM syscalls

Change the size parameters in lsm_list_modules(), lsm_set_self_attr()
and lsm_get_self_attr() from size_t to u32. This avoids the need to
have different interfaces for 32 and 64 bit systems.

Cc: stable@vger.kernel.org
Fixes: a04a1198088a ("LSM: syscalls for current process attributes")
Fixes: ad4aff9ec25f ("LSM: Create lsm_list_modules system call")
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Reported-and-reviewed-by: Dmitry V. Levin <ldv@strace.io>
[PM: subject and metadata tweaks, syscall.h fixes]
Signed-off-by: Paul Moore <paul@paul-moore.com>

4 files changed, 15 insertions, 15 deletions

diff --git a/tools/testing/selftests/lsm/common.h b/tools/testing/selftests/lsm/common.h
index d404329e5eeb..06d12110d241 100644
--- a/tools/testing/selftests/lsm/common.h
+++ b/tools/testing/selftests/lsm/common.h
@@ -7,7 +7,7 @@
 
 #ifndef lsm_get_self_attr
 static inline int lsm_get_self_attr(unsigned int attr, struct lsm_ctx *ctx,
-				    size_t *size, __u32 flags)
+				    __u32 *size, __u32 flags)
 {
 	return syscall(__NR_lsm_get_self_attr, attr, ctx, size, flags);
 }
@@ -15,14 +15,14 @@ static inline int lsm_get_self_attr(unsigned int attr, struct lsm_ctx *ctx,
 
 #ifndef lsm_set_self_attr
 static inline int lsm_set_self_attr(unsigned int attr, struct lsm_ctx *ctx,
-				    size_t size, __u32 flags)
+				    __u32 size, __u32 flags)
 {
 	return syscall(__NR_lsm_set_self_attr, attr, ctx, size, flags);
 }
 #endif
 
 #ifndef lsm_list_modules
-static inline int lsm_list_modules(__u64 *ids, size_t *size, __u32 flags)
+static inline int lsm_list_modules(__u64 *ids, __u32 *size, __u32 flags)
 {
 	return syscall(__NR_lsm_list_modules, ids, size, flags);
 }
diff --git a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
index e0e313d9047a..df215e4aa63f 100644
--- a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
+++ b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
@@ -40,7 +40,7 @@ TEST(size_null_lsm_get_self_attr)
 TEST(ctx_null_lsm_get_self_attr)
 {
 	const long page_size = sysconf(_SC_PAGESIZE);
-	size_t size = page_size;
+	__u32 size = page_size;
 	int rc;
 
 	rc = lsm_get_self_attr(LSM_ATTR_CURRENT, NULL, &size, 0);
@@ -57,7 +57,7 @@ TEST(size_too_small_lsm_get_self_attr)
 {
 	const long page_size = sysconf(_SC_PAGESIZE);
 	struct lsm_ctx *ctx = calloc(page_size, 1);
-	size_t size = 1;
+	__u32 size = 1;
 
 	ASSERT_NE(NULL, ctx);
 	errno = 0;
@@ -77,7 +77,7 @@ TEST(flags_zero_lsm_get_self_attr)
 	const long page_size = sysconf(_SC_PAGESIZE);
 	struct lsm_ctx *ctx = calloc(page_size, 1);
 	__u64 *syscall_lsms = calloc(page_size, 1);
-	size_t size;
+	__u32 size;
 	int lsmcount;
 	int i;
 
@@ -117,7 +117,7 @@ TEST(flags_overset_lsm_get_self_attr)
 {
 	const long page_size = sysconf(_SC_PAGESIZE);
 	struct lsm_ctx *ctx = calloc(page_size, 1);
-	size_t size;
+	__u32 size;
 
 	ASSERT_NE(NULL, ctx);
 
@@ -140,7 +140,7 @@ TEST(flags_overset_lsm_get_self_attr)
 TEST(basic_lsm_get_self_attr)
 {
 	const long page_size = sysconf(_SC_PAGESIZE);
-	size_t size = page_size;
+	__u32 size = page_size;
 	struct lsm_ctx *ctx = calloc(page_size, 1);
 	struct lsm_ctx *tctx = NULL;
 	__u64 *syscall_lsms = calloc(page_size, 1);
diff --git a/tools/testing/selftests/lsm/lsm_list_modules_test.c b/tools/testing/selftests/lsm/lsm_list_modules_test.c
index 4d5d4cee2586..06d24d4679a6 100644
--- a/tools/testing/selftests/lsm/lsm_list_modules_test.c
+++ b/tools/testing/selftests/lsm/lsm_list_modules_test.c
@@ -31,7 +31,7 @@ TEST(size_null_lsm_list_modules)
 TEST(ids_null_lsm_list_modules)
 {
 	const long page_size = sysconf(_SC_PAGESIZE);
-	size_t size = page_size;
+	__u32 size = page_size;
 
 	errno = 0;
 	ASSERT_EQ(-1, lsm_list_modules(NULL, &size, 0));
@@ -43,7 +43,7 @@ TEST(size_too_small_lsm_list_modules)
 {
 	const long page_size = sysconf(_SC_PAGESIZE);
 	__u64 *syscall_lsms = calloc(page_size, 1);
-	size_t size = 1;
+	__u32 size = 1;
 
 	ASSERT_NE(NULL, syscall_lsms);
 	errno = 0;
@@ -58,7 +58,7 @@ TEST(flags_set_lsm_list_modules)
 {
 	const long page_size = sysconf(_SC_PAGESIZE);
 	__u64 *syscall_lsms = calloc(page_size, 1);
-	size_t size = page_size;
+	__u32 size = page_size;
 
 	ASSERT_NE(NULL, syscall_lsms);
 	errno = 0;
@@ -72,7 +72,7 @@ TEST(flags_set_lsm_list_modules)
 TEST(correct_lsm_list_modules)
 {
 	const long page_size = sysconf(_SC_PAGESIZE);
-	size_t size = page_size;
+	__u32 size = page_size;
 	__u64 *syscall_lsms = calloc(page_size, 1);
 	char *sysfs_lsms = calloc(page_size, 1);
 	char *name;
diff --git a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
index e9712c6cf596..66dec47e3ca3 100644
--- a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
+++ b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
@@ -25,7 +25,7 @@ TEST(size_too_small_lsm_set_self_attr)
 {
 	const long page_size = sysconf(_SC_PAGESIZE);
 	struct lsm_ctx *ctx = calloc(page_size, 1);
-	size_t size = page_size;
+	__u32 size = page_size;
 
 	ASSERT_NE(NULL, ctx);
 	if (attr_lsm_count()) {
@@ -41,7 +41,7 @@ TEST(flags_zero_lsm_set_self_attr)
 {
 	const long page_size = sysconf(_SC_PAGESIZE);
 	struct lsm_ctx *ctx = calloc(page_size, 1);
-	size_t size = page_size;
+	__u32 size = page_size;
 
 	ASSERT_NE(NULL, ctx);
 	if (attr_lsm_count()) {
@@ -57,7 +57,7 @@ TEST(flags_overset_lsm_set_self_attr)
 {
 	const long page_size = sysconf(_SC_PAGESIZE);
 	char *ctx = calloc(page_size, 1);
-	size_t size = page_size;
+	__u32 size = page_size;
 	struct lsm_ctx *tctx = (struct lsm_ctx *)ctx;
 
 	ASSERT_NE(NULL, ctx);