12 Jun
2021
12 Jun
'21
7:44 p.m.
Andrew Morton akpm@linux-foundation.org writes:
On Thu, 10 Jun 2021 09:31:42 +0200 Bernd Edlinger bernd.edlinger@hotmail.de wrote:
This introduces signal->unsafe_execve_in_progress, which is used to fix the case when at least one of the sibling threads is traced, and therefore the trace process may dead-lock in ptrace_attach, but de_thread will need to wait for the tracer to continue execution.
Deadlocks are serious. Is this exploitable by unprivileged userspace?
The processes are killable so I don't think this is the serious in the way you mean. In fact Linus has already said that it is not a deadlock.
Eric