diff options
| -rw-r--r-- | net/batman-adv/tp_meter.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/batman-adv/tp_meter.c b/net/batman-adv/tp_meter.c index 9ecbc6023cfc..1655f181c929 100644 --- a/net/batman-adv/tp_meter.c +++ b/net/batman-adv/tp_meter.c @@ -154,9 +154,12 @@ static void batadv_tp_update_cwnd(struct batadv_tp_vars *tp_vars, u32 mss) return; } + /* prevent overflow in (mss * mss) << 3 */ + mss = min_t(u32, mss, (1U << 14) - 1); + /* increment CWND at least of 1 (section 3.1 of RFC5681) */ tp_vars->dec_cwnd += max_t(u32, 1U << 3, - ((mss * mss) << 6) / (tp_vars->cwnd << 3)); + ((mss * mss) << 3) / tp_vars->cwnd); if (tp_vars->dec_cwnd < (mss << 3)) { spin_unlock_bh(&tp_vars->cwnd_lock); return; |