From: Christian Brauner <brauner@kernel.org>
Date: Mon, 7 Apr 2025 09:54:22 +0000 (+0200)
Subject: selftests/filesystems: add exec() test for anonymous inodes
X-Git-Tag: v6.16-rc1~223^2~25^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f8ca403ae77cbfb4bf0fcd92c74075886f5f4aa8;p=thirdparty%2Flinux.git

selftests/filesystems: add exec() test for anonymous inodes

Test that anonymous inodes cannot be exec()ed.

Link: https://lore.kernel.org/20250407-work-anon_inode-v1-8-53a44c20d44e@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
---

diff --git a/tools/testing/selftests/filesystems/anon_inode_test.c b/tools/testing/selftests/filesystems/anon_inode_test.c
index 7c4d0a225363f..486496252ddd2 100644
--- a/tools/testing/selftests/filesystems/anon_inode_test.c
+++ b/tools/testing/selftests/filesystems/anon_inode_test.c
@@ -35,5 +35,18 @@ TEST(anon_inode_no_chmod)
 	EXPECT_EQ(close(fd_context), 0);
 }
 
+TEST(anon_inode_no_exec)
+{
+	int fd_context;
+
+	fd_context = sys_fsopen("tmpfs", 0);
+	ASSERT_GE(fd_context, 0);
+
+	ASSERT_LT(execveat(fd_context, "", NULL, NULL, AT_EMPTY_PATH), 0);
+	ASSERT_EQ(errno, EACCES);
+
+	EXPECT_EQ(close(fd_context), 0);
+}
+
 TEST_HARNESS_MAIN