selftests/ftrace: Fix unique symbol check in kprobe_non_uniq_symbol.tcgrafted

The current regex also matches symbols in modules, which makes the
test fail on s390 where name_show is present only once in the kernel,
but also multiple times in modules:

000001b1401cdc20 t name_show
000001b0c05e6c40 t name_show    [mdev]
000001b0c0495f30 t name_show    [i2c_core]

Fix this by changing the regular expression to only match the function
name.

Link: https://lore.kernel.org/all/20260909092954.2200558-1-svens@linux.ibm.com/

Fixes: 03b80ff8023a ("selftests/ftrace: Add new test case which checks non unique symbol")
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

1 files changed, 79 insertions, 0 deletions

diff --git a/fs/hfsplus/xattr_security.c b/fs/hfsplus/xattr_security.c
new file mode 100644
index 000000000..90f68ec11
--- /dev/null
+++ b/fs/hfsplus/xattr_security.c
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hfsplus/xattr_trusted.c
+ *
+ * Vyacheslav Dubeyko <slava@dubeyko.com>
+ *
+ * Handler for storing security labels as extended attributes.
+ */
+
+#include <linux/security.h>
+#include <linux/nls.h>
+
+#include "hfsplus_fs.h"
+#include "xattr.h"
+
+static int hfsplus_security_getxattr(const struct xattr_handler *handler,
+				     struct dentry *unused, struct inode *inode,
+				     const char *name, void *buffer, size_t size)
+{
+	return hfsplus_getxattr(inode, name, buffer, size,
+				XATTR_SECURITY_PREFIX,
+				XATTR_SECURITY_PREFIX_LEN);
+}
+
+static int hfsplus_security_setxattr(const struct xattr_handler *handler,
+				     struct mnt_idmap *idmap,
+				     struct dentry *unused, struct inode *inode,
+				     const char *name, const void *buffer,
+				     size_t size, int flags)
+{
+	return hfsplus_setxattr(inode, name, buffer, size, flags,
+				XATTR_SECURITY_PREFIX,
+				XATTR_SECURITY_PREFIX_LEN);
+}
+
+static int hfsplus_initxattrs(struct inode *inode,
+				const struct xattr *xattr_array,
+				void *fs_info)
+{
+	const struct xattr *xattr;
+	char *xattr_name;
+	int err = 0;
+
+	xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
+		GFP_KERNEL);
+	if (!xattr_name)
+		return -ENOMEM;
+	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
+
+		if (!strcmp(xattr->name, ""))
+			continue;
+
+		strcpy(xattr_name, XATTR_SECURITY_PREFIX);
+		strcpy(xattr_name +
+			XATTR_SECURITY_PREFIX_LEN, xattr->name);
+		memset(xattr_name +
+			XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1);
+
+		err = __hfsplus_setxattr(inode, xattr_name,
+					xattr->value, xattr->value_len, 0);
+		if (err)
+			break;
+	}
+	kfree(xattr_name);
+	return err;
+}
+
+int hfsplus_init_security(struct inode *inode, struct inode *dir,
+				const struct qstr *qstr)
+{
+	return security_inode_init_security(inode, dir, qstr,
+					&hfsplus_initxattrs, NULL);
+}
+
+const struct xattr_handler hfsplus_xattr_security_handler = {
+	.prefix	= XATTR_SECURITY_PREFIX,
+	.get	= hfsplus_security_getxattr,
+	.set	= hfsplus_security_setxattr,
+};