Test that anonymous inodes cannot be chown()ed.
Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx>
---
tools/testing/selftests/filesystems/.gitignore | 1 +
tools/testing/selftests/filesystems/Makefile | 2 +-
.../selftests/filesystems/anon_inode_test.c | 26 ++++++++++++++++++++++
3 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/filesystems/.gitignore b/tools/testing/selftests/filesystems/.gitignore
index 828b66a10c63..7afa58e2bb20 100644
--- a/tools/testing/selftests/filesystems/.gitignore
+++ b/tools/testing/selftests/filesystems/.gitignore
@@ -2,3 +2,4 @@
dnotify_test
devpts_pts
file_stressor
+anon_inode_test
diff --git a/tools/testing/selftests/filesystems/Makefile b/tools/testing/selftests/filesystems/Makefile
index 66305fc34c60..b02326193fee 100644
--- a/tools/testing/selftests/filesystems/Makefile
+++ b/tools/testing/selftests/filesystems/Makefile
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
CFLAGS += $(KHDR_INCLUDES)
-TEST_GEN_PROGS := devpts_pts file_stressor
+TEST_GEN_PROGS := devpts_pts file_stressor anon_inode_test
TEST_GEN_PROGS_EXTENDED := dnotify_test
include ../lib.mk
diff --git a/tools/testing/selftests/filesystems/anon_inode_test.c b/tools/testing/selftests/filesystems/anon_inode_test.c
new file mode 100644
index 000000000000..f2cae8f1ccae
--- /dev/null
+++ b/tools/testing/selftests/filesystems/anon_inode_test.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#define __SANE_USERSPACE_TYPES__
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <sys/stat.h>
+
+#include "../kselftest_harness.h"
+#include "overlayfs/wrappers.h"
+
+TEST(anon_inode_no_chown)
+{
+ int fd_context;
+
+ fd_context = sys_fsopen("tmpfs", 0);
+ ASSERT_GE(fd_context, 0);
+
+ ASSERT_LT(fchown(fd_context, 1234, 5678), 0);
+ ASSERT_EQ(errno, EOPNOTSUPP);
+
+ EXPECT_EQ(close(fd_context), 0);
+}
+
+TEST_HARNESS_MAIN
+
--
2.47.2
