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]
Message-ID: <20130418154919.GA7877@in.ibm.com>
Date:	Thu, 18 Apr 2013 21:19:19 +0530
From:	Ananth N Mavinakayanahalli <ananth@...ibm.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	yrl.pp-manager.tt@...achi.com
Subject: Re: [PATCH -tip ] [BUGFIX] kprobes: Fix a double lock bug of
	kprobe_mutex

On Thu, Apr 18, 2013 at 06:33:18PM +0900, Masami Hiramatsu wrote:
> Fix a double locking bug caused when debug.kprobe-optimization=0.
> While the proc_kprobes_optimization_handler locks kprobe_mutex,
> wait_for_kprobe_optimizer locks it again and that causes a double lock.
> To fix the bug, this introduces different mutex for protecting
> sysctl parameter and locks it in proc_kprobes_optimization_handler.
> Of course, since we need to lock kprobe_mutex when touching kprobes
> resources, that is done in *optimize_all_kprobes().
> 
> This bug was from ad72b3bea744b4db01c89af0f86f3e8920d354df
> 
> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Tejun Heo <tj@...nel.org>
> Cc: Ananth N Mavinakayanahalli <ananth@...ibm.com>
> Cc: "David S. Miller" <davem@...emloft.net>

Acked-by: Ananth N Mavinakayanahalli <ananth@...ibm.com>

--
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

Powered by Openwall GNU/*/Linux Powered by OpenVZ