Re: [PATCH net-next 1/3] tcp: do not overshoot window_clamp in tcp_rcv_space_adjust()

2017-12-11 Thread Neal Cardwell
On Sun, Dec 10, 2017 at 8:55 PM, Eric Dumazet wrote: > > While rcvbuf is properly clamped by tcp_rmem[2], rcvwin > is left to a potentially too big value. > > It has no serious effect, since : > 1) tcp_grow_window() has very strict checks. > 2) window_clamp can be mangled by user space to any valu

[PATCH net-next 1/3] tcp: do not overshoot window_clamp in tcp_rcv_space_adjust()

2017-12-10 Thread Eric Dumazet
While rcvbuf is properly clamped by tcp_rmem[2], rcvwin is left to a potentially too big value. It has no serious effect, since : 1) tcp_grow_window() has very strict checks. 2) window_clamp can be mangled by user space to any value anyway. tcp_init_buffer_space() and companions use tcp_full_spac