• Christoph Paasch's avatar
    tcp: Fix integer-overflow in TCP vegas · 1f74e613
    Christoph Paasch authored
    In vegas we do a multiplication of the cwnd and the rtt. This
    may overflow and thus their result is stored in a u64. However, we first
    need to cast the cwnd so that actually 64-bit arithmetic is done.
    
    Then, we need to do do_div to allow this to be used on 32-bit arches.
    
    Cc: Stephen Hemminger <stephen@networkplumber.org>
    Cc: Neal Cardwell <ncardwell@google.com>
    Cc: Eric Dumazet <eric.dumazet@gmail.com>
    Cc: David Laight <David.Laight@ACULAB.COM>
    Cc: Doug Leith <doug.leith@nuim.ie>
    Fixes: 8d3a564d (tcp: tcp_vegas cong avoid fix)
    Signed-off-by: default avatarChristoph Paasch <christoph.paasch@uclouvain.be>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    1f74e613
tcp_vegas.c 9.56 KB