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From: Greg Kroah-Hartman <>
To: Mario Rugiero <>
Cc: Richard Weinberger <>,,
	Adrian Hunter <>,
	Artem Bityutskiy <>
Subject: Re: [PATCH] ubifs: no need to check return value of debugfs_create functions
Date: Wed, 12 Jun 2019 19:00:44 +0200
Message-ID: <> (raw)
In-Reply-To: <>

A: Top-posting.
Q: What is the most annoying thing in e-mail?

A: No.
Q: Should I include quotations after my reply?

On Wed, Jun 12, 2019 at 01:52:23PM -0300, Mario Rugiero wrote:
> I think you should still abort if the directory fails to be created.


> If it's NULL, all later file creation will be attempted at root debugfs.

debugfs_create_dir() can not return NULL.

> Not only will they pollute the filesystem, but since they are not
> attached to the directory we remove on cleanup, they'll leak.

That can not happen, if the parent directory is an error pointer, the
file will just not be created.

> Also, since failure is no longer reported, it may be a good idea to
> log that failure.

Why?  To where?  For what?  debugfs should never matter if it works or
not as no no-debugging userspace code should ever depend on it, and the
kernel should not ever "fail" anything if it is not working properly.


greg k-h

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Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-12 15:21 Greg Kroah-Hartman
2019-06-12 16:52 ` Mario Rugiero
2019-06-12 17:00   ` Greg Kroah-Hartman [this message]
2019-06-12 18:53 ` Richard Weinberger
2019-06-13  5:47   ` Greg Kroah-Hartman

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