Fix buffer overflow observed when running perf test. The overflow is when trying to evaluate "1ULL << (64 - 1)" which is resulting in -9223372036854775808 which overflows the 20 character buffer.
If is possible this bug has been reported before but I still don't see any fix checked in: See: https://www.spinics.net/lists/linux-perf-users/msg07714.html Cc: Arnaldo Carvalho de Melo <a...@redhat.com> Cc: linux-perf-us...@vger.kernel.org Cc: Steven Rostedt <rost...@goodmis.org> Signed-off-by: Tony Jones <to...@suse.de> --- tools/lib/traceevent/event-parse.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index abd4fa5d3088..87494c7c619d 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -2457,7 +2457,7 @@ static int arg_num_eval(struct tep_print_arg *arg, long long *val) static char *arg_eval (struct tep_print_arg *arg) { long long val; - static char buf[20]; + static char buf[24]; switch (arg->type) { case TEP_PRINT_ATOM: -- 2.20.1
