linux-kernel - Re: [PATCH 2/3] perf core: Fix a mmap & munmap mismatches bug in dso_

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Message-ID: <87vc2ith0f.fsf@sejong.aot.lge.com>
Date:	Tue, 03 Sep 2013 18:02:24 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Chenggang Qin <chenggang.qin@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Chenggang Qin <chenggang.qcg@...bao.com>,
	David Ahern <dsahern@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Yanmin Zhang <yanmin.zhang@...el.com>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Mike Galbraith <efault@....de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 2/3] perf core: Fix a mmap & munmap mismatches bug in dso__load

On Sun,  1 Sep 2013 23:29:44 +0800, Chenggang Qin wrote:
> From: Chenggang Qin <chenggang.qcg@...bao.com>
>
> Some dsos' symsrc is neither syms_ss or runtime_ss. In this situation, the
> corresponding ELF file is opened and mmapped in symsrc__init(), but they will
> be not closed and munmapped in any place.
> This bug can lead to mmap & munmap mismatched, the mmap areas will exist during
> the life of perf. We can think this is a memory leak.
> This patch fixed the bug. symsrc__destroy() is called while the opened and
> mmaped ELF file has neither symtlb section nor dynsym section, and opdsec
> section.
> Thanks.

Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung
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