Commit c9e15f25 authored Mar 30, 2015 by Greg KH Committed by Greg Kroah-Hartman Apr 03, 2015

debugfs: allow bad parent pointers to be passed in



If something went wrong with creating a debugfs file/symlink/directory,
that value could be passed down into debugfs again as a parent dentry.
To make caller code simpler, just error out if this happens, and don't
crash the kernel.

Reported-by: Alex Elder <elder@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Alex Elder <elder@linaro.org>

parent fdc81b79

fs/debugfs/inode.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -254,6 +254,9 @@ static struct dentry start_creating(const char name, struct dentry *parent)

		pr_debug("debugfs: creating file '%s'\n",name);

		if (IS_ERR(parent))
		return parent;

		error = simple_pin_fs(&debug_fs_type, &debugfs_mount,
		&debugfs_mount_count);
		if (error)