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Revert "eventfs: Do not allow NULL parent to eventfs_start_creating()"

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This reverts commit 6abb8c223c.

The eventfs was not designed properly and may have some hidden bugs in it.
Linus rewrote it properly and I trust his version more than this one. Revert
the backported patches for 6.6 and re-apply all the changes to make it
equivalent to Linus's version.

Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Steven Rostedt (Google) 2024-02-06 07:09:06 -05:00 committed by Greg Kroah-Hartman
parent fa69a8063f
commit 6fdc0bcd06
1 changed files with 9 additions and 4 deletions
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13
fs/tracefs/inode.c
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@ -509,15 +509,20 @@ struct dentry *eventfs_start_creating(const char *name, struct dentry *parent)
struct dentry *dentry;
int error;
/* Must always have a parent. */
if (WARN_ON_ONCE(!parent))
return ERR_PTR(-EINVAL);
error = simple_pin_fs(&trace_fs_type, &tracefs_mount,
&tracefs_mount_count);
if (error)
return ERR_PTR(error);
/*
* If the parent is not specified, we create it in the root.
* We need the root dentry to do this, which is in the super
* block. A pointer to that is in the struct vfsmount that we
* have around.
*/
if (!parent)
parent = tracefs_mount->mnt_root;
if (unlikely(IS_DEADDIR(parent->d_inode)))
dentry = ERR_PTR(-ENOENT);
else