From: jamie@jamieiles.com (Jamie Iles)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] Fix infinite loop in ARM user perf_event backtrace code
Date: Mon, 18 Apr 2011 11:42:26 +0100 [thread overview]
Message-ID: <20110418104226.GA2820@pulham.picochip.com> (raw)
In-Reply-To: <1302924445-18557-1-git-send-email-sonnyrao@chromium.org>
Hi,
On Fri, Apr 15, 2011 at 08:27:25PM -0700, Sonny Rao wrote:
> The ARM user backtrace code can get into an infinite loop if it
> runs into an invalid stack frame which points back to itself.
> This situation has been observed in practice. Fix it by capping
> the number of entries in the backtrace. This is also what other
> architectures do in their backtrace code.
Tested on my v6k board and looks good.
> Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
Acked-by: Jamie Iles <jamie@jamieiles.com>
Jamie
next prev parent reply other threads:[~2011-04-18 10:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-16 3:27 [PATCH] Fix infinite loop in ARM user perf_event backtrace code Sonny Rao
2011-04-18 10:42 ` Jamie Iles [this message]
2011-04-18 17:42 ` Will Deacon
2011-04-18 21:02 ` Sonny Rao
2011-04-18 18:31 ` Olof Johansson
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