From: Thomas Richter <[email protected]> In x86 architecture dependend part function get_cpuid_str() mallocs a 128 byte buffer, but does not check if the memory allocation succeeded or not.
When the memory allocation fails, function __get_cpuid() is called with first parameter being a NULL pointer. However this function references its first parameter and operates on a NULL pointer which might cause core dumps. Signed-off-by: Thomas Richter <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Hendrik Brueckner <[email protected]> Cc: Martin Schwidefsky <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/arch/x86/util/header.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/arch/x86/util/header.c b/tools/perf/arch/x86/util/header.c index b626d2bad9f1..fb0d71afee8b 100644 --- a/tools/perf/arch/x86/util/header.c +++ b/tools/perf/arch/x86/util/header.c @@ -70,7 +70,7 @@ get_cpuid_str(struct perf_pmu *pmu __maybe_unused) { char *buf = malloc(128); - if (__get_cpuid(buf, 128, "%s-%u-%X$") < 0) { + if (buf && __get_cpuid(buf, 128, "%s-%u-%X$") < 0) { free(buf); return NULL; } -- 2.14.3
