Merge remote-tracking branch 'torvalds/master' into perf/core

To pick up the fixes sent for v5.12 and continue development based on
v5.12-rc2, i.e. without the swap on file bug.

This also gets a slightly newer and better tools/perf/arch/arm/util/cs-etm.c
patch version, using the BIT() macro, that had already been slated to
v5.13 but ended up going to v5.12-rc1 on an older version.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 9 insertions, 5 deletions

diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 2fcf66473436b..22e86ae4dd5a8 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -42,13 +42,14 @@ static unsigned int debugfs_allow = DEFAULT_DEBUGFS_ALLOW_BITS;
  * so that we can use the file mode as part of a heuristic to determine whether
  * to lock down individual files.
  */
-static int debugfs_setattr(struct dentry *dentry, struct iattr *ia)
+static int debugfs_setattr(struct user_namespace *mnt_userns,
+			   struct dentry *dentry, struct iattr *ia)
 {
 	int ret = security_locked_down(LOCKDOWN_DEBUGFS);
 
 	if (ret && (ia->ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID)))
 		return ret;
-	return simple_setattr(dentry, ia);
+	return simple_setattr(&init_user_ns, dentry, ia);
 }
 
 static const struct inode_operations debugfs_file_inode_operations = {
@@ -297,7 +298,7 @@ struct dentry *debugfs_lookup(const char *name, struct dentry *parent)
 {
 	struct dentry *dentry;
 
-	if (IS_ERR(parent))
+	if (!debugfs_initialized() || IS_ERR_OR_NULL(name) || IS_ERR(parent))
 		return NULL;
 
 	if (!parent)
@@ -318,6 +319,9 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
 	if (!(debugfs_allow & DEBUGFS_ALLOW_API))
 		return ERR_PTR(-EPERM);
 
+	if (!debugfs_initialized())
+		return ERR_PTR(-ENOENT);
+
 	pr_debug("creating file '%s'\n", name);
 
 	if (IS_ERR(parent))
@@ -775,8 +779,8 @@ struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
 
 	take_dentry_name_snapshot(&old_name, old_dentry);
 
-	error = simple_rename(d_inode(old_dir), old_dentry, d_inode(new_dir),
-			      dentry, 0);
+	error = simple_rename(&init_user_ns, d_inode(old_dir), old_dentry,
+			      d_inode(new_dir), dentry, 0);
 	if (error) {
 		release_dentry_name_snapshot(&old_name);
 		goto exit;