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check for potential unsigned integer wraparound before adding

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KIU Shueng Chuan 2015-07-25 17:46:46 +08:00
parent 7701a8f936
commit 2182bc963d
1 changed files with 3 additions and 2 deletions
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5
src/msg.cpp
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@ -103,8 +103,9 @@ int zmq::msg_t::init_size (size_t size_)
u.lmsg.type = type_lmsg;
u.lmsg.flags = 0;
u.lmsg.routing_id = 0;
u.lmsg.content =
(content_t*) malloc (sizeof (content_t) + size_);
u.lmsg.content = NULL;
if (sizeof (content_t) + size_ > size_)
u.lmsg.content = (content_t*) malloc (sizeof (content_t) + size_);
if (unlikely (!u.lmsg.content)) {
errno = ENOMEM;
return -1;