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perf traceevent: Ensure read cmdlines are null terminated.

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commit 137a5258939aca56558f3a23eb229b9c4b293917 upstream.

Issue detected by address sanitizer.

Fixes: cd4ceb63438e9e28 ("perf util: Save pid-cmdline mapping into tracing header")
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20210226221431.1985458-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Rogers 2021-02-26 14:14:31 -08:00 committed by Greg Kroah-Hartman
parent ef663d149f
commit 4d0273ab0a
1 changed files with 1 additions and 0 deletions
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tools/perf/util/trace-event-read.c
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@ -361,6 +361,7 @@ static int read_saved_cmdline(struct tep_handle *pevent)
pr_debug("error reading saved cmdlines\n");
goto out;
}
buf[ret] = '\0';
parse_saved_cmdline(pevent, buf, size);
ret = 0;