diff options
Diffstat (limited to 'pkg/sentry/syscalls/linux/sys_socket.go')
| -rw-r--r-- | pkg/sentry/syscalls/linux/sys_socket.go | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/pkg/sentry/syscalls/linux/sys_socket.go b/pkg/sentry/syscalls/linux/sys_socket.go index 9feaca0da..9cd052c3d 100644 --- a/pkg/sentry/syscalls/linux/sys_socket.go +++ b/pkg/sentry/syscalls/linux/sys_socket.go @@ -1052,7 +1052,9 @@ func sendSingleMsg(t *kernel.Task, s socket.Socket, file *fs.File, msgPtr userme // Call the syscall implementation. n, e := s.SendMsg(t, src, to, int(flags), haveDeadline, deadline, controlMessages) err = handleIOError(t, n != 0, e.ToError(), syserror.ERESTARTSYS, "sendmsg", file) - if err != nil { + // Control messages should be released on error as well as for zero-length + // messages, which are discarded by the receiver. + if n == 0 || err != nil { controlMessages.Release(t) } return uintptr(n), err |