Messages in this thread | | | Date | Wed, 21 May 2014 23:55:47 +0200 | From | Borislav Petkov <> | Subject | Re: [RFC] x86_64: A real proposal for iret-less return to kernel |
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On Wed, May 21, 2014 at 02:52:55PM -0700, Andy Lutomirski wrote: > Why is it a problem if user_mode_vm(regs)? Conversely, why is sending > a signal a remotely reasonable thing to do if !user_mode_vm(regs)?
Let me quote Jiri:
(1) task sends signal to itself (2) it acquires sighand->siglock so that it's able to queue the signal (3) MCE triggers (4) it tries to send a signal to the same task (5) it tries to acquire sighand->siglock and loops forever
-- Regards/Gruss, Boris.
Sent from a fat crate under my desk. Formatting is fine. --
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