diff options
| -rw-r--r-- | lib/multi.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/multi.c b/lib/multi.c index 5753f58f7..217849c5a 100644 --- a/lib/multi.c +++ b/lib/multi.c @@ -1022,6 +1022,10 @@ CURLMcode curl_multi_wait(struct Curl_multi *multi, if(nfds) { if(nfds > NUM_POLLS_ON_STACK) { + /* 'nfds' is a 32 bit value and 'struct pollfd' is typically 8 bytes + big, so at 2^29 sockets this value might wrap. When a process gets + the capability to actually handle over 500 million sockets this + calculation needs a integer overflow check. */ ufds = malloc(nfds * sizeof(struct pollfd)); if(!ufds) return CURLM_OUT_OF_MEMORY; |