Re: net/ipv4: divide error in __tcp_select_window

2017-08-31 Thread Neal Cardwell
On Thu, Aug 31, 2017 at 3:25 PM, David Miller wrote: > > From: Neal Cardwell > Date: Thu, 31 Aug 2017 07:11:28 -0400 > > > Thanks for the report. I believe this tcp_recvmsg => tcp_cleanup_rbuf > > => __tcp_select_window divide-by-zero issue was fixed

Re: net/ipv4: divide error in __tcp_select_window

2017-08-31 Thread David Miller
From: Neal Cardwell Date: Thu, 31 Aug 2017 07:11:28 -0400 > Thanks for the report. I believe this tcp_recvmsg => tcp_cleanup_rbuf > => __tcp_select_window divide-by-zero issue was fixed in May by Wei, > in: > > 499350a5a6e7 tcp: initialize rcv_mss to TCP_MIN_MSS instead

Re: net/ipv4: divide error in __tcp_select_window

2017-08-31 Thread Neal Cardwell
On Thu, Aug 31, 2017 at 1:56 AM, idaifish wrote: > Hi: >This bug seems still can be triggered by the attached PoC on latest > Ubuntu1604 (4.4.0-94-generic) > > > divide error: [#1] SMP KASAN