On Wed, Jan 23, 2019 at 11:28:14AM +0100, Greg Kroah-Hartman wrote:
> When an error happens, debugfs should return an error pointer value, not
> NULL. This will prevent the totally theoretical error where a debugfs
> call fails due to lack of memory, returning NULL, and that dentry value
> is then passed to another debugfs call, which would end up succeeding,
> creating a file at the root of the debugfs tree, but would then be
> impossible to remove (because you can not remove the directory NULL).
>
> So, to make everyone happy, always return errors, this makes the users
> of debugfs much simpler (they do not have to ever check the return
> value), and everyone can rest easy.
>
> Reported-by: Masami Hiramatsu <mhira...@kernel.org>
> Reported-by: Ulf Hansson <ulf.hans...@linaro.org>
> Reported-by: Gary R Hook <gh...@amd.com>
> Reported-by: Heiko Carstens <heiko.carst...@de.ibm.com>
Oops, also reported by:
Sebastian Andrzej Siewior <bige...@linutronix.de>
I'll go fix that up when I merge this.
greg k-h
