linux-kernel - Re: [PATCH v1] perf lock: More strdup argument freeing

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Date: Wed, 1 May 2024 15:22:20 +0100
From: James Clark <james.clark@....com>
To: Ian Rogers <irogers@...gle.com>
Cc: zhaimingbing <zhaimingbing@...s.chinamobile.com>,
 Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>,
 Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>,
 Kan Liang <kan.liang@...ux.intel.com>, linux-perf-users@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] perf lock: More strdup argument freeing



On 30/04/2024 19:41, Ian Rogers wrote:
> Leak sanitizer complains about the strdup-ed arguments not being
> freed. rec_argv is reordered and duplicates inserted, meaning making
> all its contents strdup-ed and freeing them all leads to double frees
> or leaks. Add an extra array to track strup-ed arguments and free
> them. This makes address sanitier running `perf test` "kernel lock
> contention analysis test" memory leak free.
> 
> Signed-off-by: Ian Rogers <irogers@...gle.com>

Reviewed-by: James Clark <james.clark@....com>