netdev - Re: [PATCH v3 0/2] Fix uevent race in register

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 linux-hardening linux-cve-announce 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:	Mon, 16 May 2011 14:11:58 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	kvalo@...rom.com
Cc:	netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/2] Fix uevent race in register_netdevice()

From: Kalle Valo <kvalo@...rom.com>
Date: Mon, 16 May 2011 17:46:30 +0300

> I'm trying to fix a race in register_netdevice(). The problem is that
> there's a uevent to userspace before the netdevice is ready for use. The
> problem is described here:
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=15606
> 
> I have sent few different ways to fix this, but none of them have been
> really usable. Now I came up with a way which changes the driver core
> to make it possible send the uevent in a separate call. This is a clean
> and safe way to fix the race. Downside is that two new functions are
> added to the driver core interface.
> 
> Please comment.

This doesn't work.

The sysfs file will still be there before the uevent, so any
process can go in there, and see the inconsistent state.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html