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perf jevents: Fix suspicious code in fixregex() 

[ Upstream commit e62458e394 ]

The new string should have enough space for the original string and the
back slashes IMHO.

Fixes: fbc2844e84 ("perf vendor events: Use more flexible pattern matching for CPU identification for mapfile.csv")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Reviewed-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: William Cohen <wcohen@redhat.com>
Link: http://lore.kernel.org/lkml/20200903152510.489233-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Namhyung Kim 2020-09-04 00:25:10 +09:00 committed by Greg Kroah-Hartman
parent 6c4ad5444a
commit b0c40f8a7a
1 changed files with 1 additions and 1 deletions
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2
tools/perf/pmu-events/jevents.c
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@ -137,7 +137,7 @@ static char *fixregex(char *s)
return s;
/* allocate space for a new string */
fixed = (char *) malloc(len + 1);
fixed = (char *) malloc(len + esc_count + 1);
if (!fixed)
return NULL;