diff options
Diffstat (limited to 'pkg/sentry/socket/rpcinet/socket.go')
| -rw-r--r-- | pkg/sentry/socket/rpcinet/socket.go | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/pkg/sentry/socket/rpcinet/socket.go b/pkg/sentry/socket/rpcinet/socket.go index ffe947500..6f1a4fe01 100644 --- a/pkg/sentry/socket/rpcinet/socket.go +++ b/pkg/sentry/socket/rpcinet/socket.go @@ -465,9 +465,13 @@ func (s *socketOperations) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags res, err := rpcRecvMsg(t, req) if err == nil { - n, e := dst.CopyOut(t, res.Data) - if e == nil && n != len(res.Data) { - panic("CopyOut failed to copy full buffer") + var e error + var n int + if len(res.Data) > 0 { + n, e = dst.CopyOut(t, res.Data) + if e == nil && n != len(res.Data) { + panic("CopyOut failed to copy full buffer") + } } return int(res.Length), res.Address.GetAddress(), res.Address.GetLength(), socket.ControlMessages{}, syserr.FromError(e) } @@ -484,9 +488,13 @@ func (s *socketOperations) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags for { res, err := rpcRecvMsg(t, req) if err == nil { - n, e := dst.CopyOut(t, res.Data) - if e == nil && n != len(res.Data) { - panic("CopyOut failed to copy full buffer") + var e error + var n int + if len(res.Data) > 0 { + n, e = dst.CopyOut(t, res.Data) + if e == nil && n != len(res.Data) { + panic("CopyOut failed to copy full buffer") + } } return int(res.Length), res.Address.GetAddress(), res.Address.GetLength(), socket.ControlMessages{}, syserr.FromError(e) } |