linux-kernel - Re: [PATCH v1 09/11] x86: perf: intel

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Message-ID: <20140206203601.GB12219@tassilo.jf.intel.com>
Date:	Thu, 6 Feb 2014 12:36:01 -0800
From:	Andi Kleen <ak@...ux.intel.com>
To:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Matt Fleming <matt.fleming@...el.com>
Subject: Re: [PATCH v1 09/11] x86: perf: intel_pt: Add core dump functionality

>  			   char *buf)
> @@ -114,6 +143,7 @@ static ssize_t pt_cap_store(struct device *cdev,
>  		return -EINVAL;
>  
>  	pt_cap_set(cap, new);
> +	pt_cap_string();

Don't we need some lock here? Otherwise it may leak memory with racing writes
and become inconsistent.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only
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