linux-kernel - [PATCH] uevent: send events in correct order according to seqnum

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Message-Id: <1331064368-55675-1-git-send-email-avagin@openvz.org>
Date:	Wed,  7 Mar 2012 00:06:08 +0400
From:	Andrew Vagin <avagin@...nvz.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Kay Sievers <kay.sievers@...y.org>
Cc:	avagin@...nvz.org, linux-hotplug@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] uevent: send events in correct order according to seqnum

The queue handling in the udev daemon assumes that the events are
ordered.

Before this patch uevent_seqnum is incremented under sequence_lock,
than an event is send uner uevent_sock_mutex. I want to say that code
contained a window between incrementing seqnum and sending an event.

This patch locks uevent_sock_mutex before incrementing uevent_seqnum.

Signed-off-by: Andrew Vagin <avagin@...nvz.org>
---
 lib/kobject_uevent.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

View attachment "0001-uevent-send-events-in-correct-order-according-to-seq.patch" of type "text/x-patch" (799 bytes)