[LTP] [PATCH 8/8] Add setxattrat02 test

[Andrea Cervesato]

From: Andrea Cervesato <andrea.cervesato@suse.com>

Test if setxattrat() syscall is correctly raising errors when giving
invalid inputs.

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
 testcases/kernel/syscalls/setxattrat/.gitignore    |   1 +
 .../kernel/syscalls/setxattrat/setxattrat02.c      | 126 +++++++++++++++++++++
 2 files changed, 127 insertions(+)

diff --git a/testcases/kernel/syscalls/setxattrat/.gitignore b/testcases/kernel/syscalls/setxattrat/.gitignore
index e636401d7ac3ed58c5f9a24ad31291f0dc1c9ae7..9d007a44dfca6e06cdb5b368201921461c68684d 100644
--- a/testcases/kernel/syscalls/setxattrat/.gitignore
+++ b/testcases/kernel/syscalls/setxattrat/.gitignore
@@ -1 +1,2 @@
 setxattrat01
+setxattrat02
diff --git a/testcases/kernel/syscalls/setxattrat/setxattrat02.c b/testcases/kernel/syscalls/setxattrat/setxattrat02.c
new file mode 100644
index 0000000000000000000000000000000000000000..7891dc9e5f7c051c8413cfea677417d7edd8bef5
--- /dev/null
+++ b/testcases/kernel/syscalls/setxattrat/setxattrat02.c
@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2025 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Test if setxattrat() syscall is correctly raising errors when giving invalid
+ * inputs.
+ */
+
+#include <sys/xattr.h>
+
+#include "tst_test.h"
+#include "lapi/xattr.h"
+#include "lapi/syscalls.h"
+
+#define FNAME "ltp_file"
+#define XATTR_TEST_KEY "trusted.ltptestkey"
+#define XATTR_TEST_VALUE "ltprulez"
+#define XATTR_TEST_VALUE_SIZE 8
+
+static struct xattr_args *args;
+static struct xattr_args *null_args;
+static int invalid_fd = -1;
+static int tmpdir_fd = -1;
+
+static struct tcase {
+	int *dfd;
+	int at_flags;
+	struct xattr_args **args;
+	size_t args_size;
+	int exp_errno;
+	char *reason;
+} tcases[] = {
+	{
+		.dfd = &invalid_fd,
+		.args = &args,
+		.args_size = sizeof(struct xattr_args),
+		.exp_errno = EBADF,
+		.reason = "Invalid directory file descriptor",
+	},
+	{
+		.dfd = &tmpdir_fd,
+		.at_flags = -1,
+		.args = &args,
+		.args_size = sizeof(struct xattr_args),
+		.exp_errno = EINVAL,
+		.reason = "Invalid AT flags",
+	},
+	{
+		.dfd = &tmpdir_fd,
+		.at_flags = AT_SYMLINK_NOFOLLOW + 1,
+		.args = &args,
+		.args_size = sizeof(struct xattr_args),
+		.exp_errno = EINVAL,
+		.reason = "Out of bound AT flags",
+	},
+	{
+		.dfd = &tmpdir_fd,
+		.args = &null_args,
+		.args_size = sizeof(struct xattr_args),
+		.exp_errno = EINVAL,
+		.reason = "Invalid arguments",
+	},
+	{
+		.dfd = &tmpdir_fd,
+		.args = &args,
+		.args_size = SIZE_MAX,
+		.exp_errno = E2BIG,
+		.reason = "Arguments size is too big",
+	},
+	{
+		.dfd = &tmpdir_fd,
+		.args = &args,
+		.args_size = sizeof(struct xattr_args) - 1,
+		.exp_errno = EINVAL,
+		.reason = "Invalid arguments size",
+	},
+};
+
+static void run(unsigned int i)
+{
+	struct tcase *tc = &tcases[i];
+
+	args->flags = XATTR_CREATE;
+	args->value = XATTR_TEST_VALUE;
+	args->size = XATTR_TEST_VALUE_SIZE;
+
+	TST_EXP_FAIL(tst_syscall(__NR_setxattrat,
+		tc->dfd, FNAME, tc->at_flags, XATTR_TEST_KEY,
+		tc->args, tc->args_size),
+		tc->exp_errno, "%s", tc->reason);
+}
+
+static void setup(void)
+{
+	char *tmpdir;
+
+	tmpdir = tst_tmpdir_path();
+	tmpdir_fd = SAFE_OPEN(tmpdir, O_DIRECTORY);
+
+	SAFE_TOUCH(FNAME, 0777, NULL);
+}
+
+static void cleanup(void)
+{
+	if (tmpdir_fd != -1)
+		SAFE_CLOSE(tmpdir_fd);
+
+	SAFE_UNLINK(FNAME);
+}
+
+static struct tst_test test = {
+	.test = run,
+	.setup = setup,
+	.cleanup = cleanup,
+	.tcnt = ARRAY_SIZE(tcases),
+	.needs_root = 1,
+	.needs_tmpdir = 1,
+	.bufs = (struct tst_buffers []) {
+		{&args, .size = sizeof(struct xattr_args)},
+		{},
+	}
+};

-- 
2.43.0