On Thu, 19 Nov 2020 18:59:48 +0300 Vadim Fedorenko wrote: > In case when tcp socket received FIN after some data and the > parser haven't started before reading data caller will receive > an empty buffer. This behavior differs from plain TCP socket and > leads to special treating in user-space. > The flow that triggers the race is simple. Server sends small > amount of data right after the connection is configured to use TLS > and closes the connection. In this case receiver sees TLS Handshake > data, configures TLS socket right after Change Cipher Spec record. > While the configuration is in process, TCP socket receives small > Application Data record, Encrypted Alert record and FIN packet. So > the TCP socket changes sk_shutdown to RCV_SHUTDOWN and sk_flag with > SK_DONE bit set. The received data is not parsed upon arrival and is > never sent to user-space. > > Patch unpauses parser directly if we have unparsed data in tcp > receive queue. > > Signed-off-by: Vadim Fedorenko <vfedore...@novek.ru>
Applied, thanks!
