lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Thu, 12 Jul 2007 10:06:17 +0900 (JST)
From:	YOSHIFUJI Hideaki / 吉藤英明 
	<yoshfuji@...ux-ipv6.org>
To:	gregkh@...e.de
Cc:	linux-kernel@...r.kernel.org, htejun@...il.com,
	yoshfuji@...ux-ipv6.org
Subject: Re: [PATCH 24/61] sysfs: make sysfs_put() ignore NULL sd

In article <20070711235529.GA7485@...e.de> (at Wed, 11 Jul 2007 16:55:29 -0700), Greg KH <gregkh@...e.de> says:

> On Thu, Jul 12, 2007 at 08:50:47AM +0900, YOSHIFUJI Hideaki / ?$B5HF#1QL@ wrote:
> > In article <11841968512510-git-send-email-gregkh@...e.de> (at Wed, 11 Jul 2007 16:31:43 -0700), Greg Kroah-Hartman <gregkh@...e.de> says:
> > 
> > > Make sysfs_put() ignore NULL sd instead of oopsing.
> > 
> > I do not think this is a good idea; it is non-sense (and rather a bug)
> > to call "put" with NULL argument in general.
> 
> It's better than having to check it all the time in the caller :)

How many callers do we have that will get benefit from this change?

Well, the change will hide the bug. It seems all callers in fs/sysfs
already assume that the argument is NOT NULL, and it is a bug to call
sysfs_put() with NULL; the function should be used to "put" something
you "have" (non-NULL). If it is called with NULL, I would say, we
should BUG here to detect the logical bug.

--yoshfuji
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists