hostfs: Add a BUG_ON to detect behavior changes of dentry_path_raw()



hostfs' __dentry_name() relies on the fact that dentry_path_raw() will place
the path name at the end of the provided buffer.
While this is okay, add a BUG_ON() to detect behavior changes as soon
as possible.

Signed-off-by: Richard Weinberger <richard@nod.at>

parent 41761ddf

fs/hostfs/hostfs_kern.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -93,6 +93,13 @@ static char __dentry_name(struct dentry dentry, char *name)
		__putname(name);
		return NULL;
		}

		/*
		* This function relies on the fact that dentry_path_raw() will place
		* the path name at the end of the provided buffer.
		*/
		BUG_ON(p + strlen(p) + 1 != name + PATH_MAX);

		strlcpy(name, root, PATH_MAX);
		if (len > p - name) {
		__putname(name);