Commit e75d285b authored by Kershaw Chang's avatar Kershaw Chang Committed by Richard Pospesel
Browse files

Bug 1789808 - Fix buffer overflow, r=necko-reviewers,dragana, a=dmeehan 

Differential Revision: https://phabricator.services.mozilla.com/D158654
parent 676b50fe

netwerk/system/mac/nsNetworkLinkService.mm

+5 −2
Original line number Diff line number Diff line
@@ -246,11 +246,14 @@ static bool scanArp(char* ip, char* mac, size_t maclen) { 
    if (st == 0 || errno != ENOMEM) {

      break;

    }

    needed += needed / 8;



    auto tmp = MakeUnique<char[]>(needed);

    size_t increased = needed;

    increased += increased / 8;



    auto tmp = MakeUnique<char[]>(increased);

    memcpy(&tmp[0], &buf[0], needed);

    buf = std::move(tmp);

    needed = increased;

  }

  if (st == -1) {

    return false;