* David Laight <David.Laight@xxxxxxxxxx> wrote: > [...] unfortunately it worked by looking at the user-space buffers on system > call entry - and a multithreaded program can easily arrange to update them > after the initial check! [...] Such problems of reliability/persistency of security checks is exactly one of my arguments why this should not be limited to the syscall boundary, if you read the example i have provided in this discussion. Thanks, Ingo