From: Krister Johansen <kjlx@templeofstupid.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: "Namhyung Kim" <namhyung@kernel.org>,
"Masami Hiramatsu" <mhiramat@kernel.org>,
"Frédéric Weisbecker" <fweisbec@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 perf/core] perf script: fix a use after free crash.
Date: Tue, 25 Oct 2016 17:20:10 -0700 [thread overview]
Message-ID: <20161026002010.GD2525@templeofstupid.com> (raw)
In-Reply-To: <20161011092839.GC7837@templeofstupid.com>
On Tue, Oct 11, 2016 at 02:28:39AM -0700, Krister Johansen wrote:
> If dso__load_kcore frees all of the existing maps, but one has already
> been attached to a callchain cursor node, then we can get a SIGSEGV in
> any function that happens to try to use this invalid cursor. Use the
> existing map refcount mechanism to forestall cleanup of a map until the
> cursor iterates past the node.
It has been a couple of weeks since I sent out v2 of this patch. I
understand that folks here have plenty of irons in the fire, but I
wanted to double-check that nobody was waiting on me for additional
information or changes.
Thanks,
-K
next prev parent reply other threads:[~2016-10-26 0:20 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-02 3:13 [PATCH perf/core] perf script: fix a use after free crash Krister Johansen
2016-10-05 11:45 ` callchain map refcounting fixes was " Arnaldo Carvalho de Melo
2016-10-06 0:29 ` Masami Hiramatsu
2016-10-06 6:12 ` Krister Johansen
2016-10-07 2:22 ` Namhyung Kim
2016-10-09 6:13 ` Krister Johansen
2016-10-11 9:28 ` Krister Johansen
2016-10-11 9:28 ` [PATCH v2 " Krister Johansen
2016-10-26 0:20 ` Krister Johansen [this message]
2016-10-26 13:44 ` Arnaldo Carvalho de Melo
2016-11-11 0:40 ` Krister Johansen
2016-11-22 19:01 ` Arnaldo Carvalho de Melo
2016-12-02 7:12 ` Krister Johansen
2016-12-29 1:39 ` Krister Johansen
2017-01-02 15:15 ` Arnaldo Carvalho de Melo
2017-01-02 17:35 ` Arnaldo Carvalho de Melo
2017-01-02 17:36 ` Arnaldo Carvalho de Melo
2017-01-02 19:39 ` Arnaldo Carvalho de Melo
2017-01-03 0:30 ` Arnaldo Carvalho de Melo
2017-01-04 8:37 ` Krister Johansen
2017-01-06 6:22 ` Krister Johansen
2017-01-06 6:23 ` [PATCH v3 " Krister Johansen
2017-01-21 1:48 ` Krister Johansen
2017-02-01 14:39 ` [tip:perf/core] perf callchain: Reference count maps tip-bot for Krister Johansen
2017-02-03 19:47 ` [tip:perf/urgent] " tip-bot for Krister Johansen
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