Skip the memcpy when len = 0, definitely don't ignore attempt to copy X bytes from NULL where X != 0 :). --- monitor/main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/monitor/main.c b/monitor/main.c index 020dba86..41692cd1 100644 --- a/monitor/main.c +++ b/monitor/main.c @@ -176,7 +176,8 @@ static size_t rta_add(void *rta_buf, unsigned short type, uint16_t len, rta->rta_len = rta_len; rta->rta_type = type; - memcpy(RTA_DATA(rta), data, len); + if (len) + memcpy(RTA_DATA(rta), data, len); return RTA_SPACE(len); } -- 2.24.0-rc1