linux-kernel - Re: [PATCH] hrtimer: prevent overrun DoS in hrtimer

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:	Wed, 14 Mar 2007 11:08:16 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Chuck Ebbert <cebbert@...hat.com>,
	Johannes Bauer <JohannesBauer@....de>,
	linux-kernel@...r.kernel.org, schwab@...e.de,
	Stable Kernel Team <stable@...nel.org>,
	Greg KH <greg@...ah.com>, Adrian Bunk <bunk@...sta.de>,
	Andrew Morton <akpm@...l.org>
Subject: Re: [PATCH] hrtimer: prevent overrun DoS in hrtimer_forward()


* Thomas Gleixner <tglx@...utronix.de> wrote:

> hrtimer_forward() does not check for the possible overflow of 
> timer->expires. This can happen on 64 bit machines with large interval 
> values and results currently in an endless loop in the softirq because 
> the expiry value becomes negative and therefor the timer is expired 
> all the time.
> 
> Check for this condition and set the expiry value to the max. expiry 
> time in the future.
> 
> The fix should be applied to stable kernel series as well.
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix,de>

ouch ... nice one.

Acked-by: Ingo Molnar <mingo@...e.hu>

	Ingo
-
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/