From 0e32d98f3a5d4f81459635efcaa53898f43996b9 Mon Sep 17 00:00:00 2001 From: Bhasker Hariharan Date: Tue, 17 Nov 2020 22:56:44 -0800 Subject: Fix endpoint.Read() when endpoint is in StateError. If the endpoint is in StateError but e.hardErrorLocked() returns nil then return ErrClosedForRecieve. This can happen if a concurrent write on the same endpoint was in progress when the endpoint transitioned to an error state. PiperOrigin-RevId: 343018257 --- pkg/tcpip/transport/tcp/endpoint.go | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'pkg') diff --git a/pkg/tcpip/transport/tcp/endpoint.go b/pkg/tcpip/transport/tcp/endpoint.go index a2161e49d..173cd28ec 100644 --- a/pkg/tcpip/transport/tcp/endpoint.go +++ b/pkg/tcpip/transport/tcp/endpoint.go @@ -1330,7 +1330,10 @@ func (e *endpoint) Read(*tcpip.FullAddress) (buffer.View, tcpip.ControlMessages, if s := e.EndpointState(); !s.connected() && s != StateClose && bufUsed == 0 { e.rcvListMu.Unlock() if s == StateError { - return buffer.View{}, tcpip.ControlMessages{}, e.hardErrorLocked() + if err := e.hardErrorLocked(); err != nil { + return buffer.View{}, tcpip.ControlMessages{}, err + } + return buffer.View{}, tcpip.ControlMessages{}, tcpip.ErrClosedForReceive } e.stats.ReadErrors.NotConnected.Increment() return buffer.View{}, tcpip.ControlMessages{}, tcpip.ErrNotConnected -- cgit v1.2.3