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-rw-r--r--pkg/abi/linux/linux_abi_autogen_unsafe.go6
-rw-r--r--pkg/tcpip/transport/tcp/endpoint.go12
2 files changed, 13 insertions, 5 deletions
diff --git a/pkg/abi/linux/linux_abi_autogen_unsafe.go b/pkg/abi/linux/linux_abi_autogen_unsafe.go
index 4579362f5..f18f8a0e2 100644
--- a/pkg/abi/linux/linux_abi_autogen_unsafe.go
+++ b/pkg/abi/linux/linux_abi_autogen_unsafe.go
@@ -124,12 +124,12 @@ func (s *Statx) UnmarshalBytes(src []byte) {
// Packed implements marshal.Marshallable.Packed.
//go:nosplit
func (s *Statx) Packed() bool {
- return s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed()
+ return s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed()
}
// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
func (s *Statx) MarshalUnsafe(dst []byte) {
- if s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() && s.Btime.Packed() {
+ if s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() {
safecopy.CopyIn(dst, unsafe.Pointer(s))
} else {
s.MarshalBytes(dst)
@@ -178,7 +178,7 @@ func (s *Statx) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) {
// CopyIn implements marshal.Marshallable.CopyIn.
//go:nosplit
func (s *Statx) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
- if !s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() {
+ if !s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() {
// Type Statx doesn't have a packed layout in memory, fall back to UnmarshalBytes.
buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay.
length, err := task.CopyInBytes(addr, buf) // escapes: okay.
diff --git a/pkg/tcpip/transport/tcp/endpoint.go b/pkg/tcpip/transport/tcp/endpoint.go
index 99a691815..bd3ec5a8d 100644
--- a/pkg/tcpip/transport/tcp/endpoint.go
+++ b/pkg/tcpip/transport/tcp/endpoint.go
@@ -1212,6 +1212,16 @@ func (e *endpoint) SetOwner(owner tcpip.PacketOwner) {
// Read reads data from the endpoint.
func (e *endpoint) Read(*tcpip.FullAddress) (buffer.View, tcpip.ControlMessages, *tcpip.Error) {
e.LockUser()
+ defer e.UnlockUser()
+
+ // When in SYN-SENT state, let the caller block on the receive.
+ // An application can initiate a non-blocking connect and then block
+ // on a receive. It can expect to read any data after the handshake
+ // is complete. RFC793, section 3.9, p58.
+ if e.EndpointState() == StateSynSent {
+ return buffer.View{}, tcpip.ControlMessages{}, tcpip.ErrWouldBlock
+ }
+
// The endpoint can be read if it's connected, or if it's already closed
// but has some pending unread data. Also note that a RST being received
// would cause the state to become StateError so we should allow the
@@ -1221,7 +1231,6 @@ func (e *endpoint) Read(*tcpip.FullAddress) (buffer.View, tcpip.ControlMessages,
if s := e.EndpointState(); !s.connected() && s != StateClose && bufUsed == 0 {
e.rcvListMu.Unlock()
he := e.HardError
- e.UnlockUser()
if s == StateError {
return buffer.View{}, tcpip.ControlMessages{}, he
}
@@ -1231,7 +1240,6 @@ func (e *endpoint) Read(*tcpip.FullAddress) (buffer.View, tcpip.ControlMessages,
v, err := e.readLocked()
e.rcvListMu.Unlock()
- e.UnlockUser()
if err == tcpip.ErrClosedForReceive {
e.stats.ReadErrors.ReadClosed.Increment()