um: Ensure that a stub page cannot get unmapped
authorRichard Weinberger <richard@nod.at>
Sun, 20 Jul 2014 11:09:15 +0000 (13:09 +0200)
committerRichard Weinberger <richard@nod.at>
Sun, 20 Jul 2014 11:09:15 +0000 (13:09 +0200)
commit284e6d39516cc7f9fbceebb259849fcb41559a7b
treeb921cdd0911583d68e3de7fb48a9ef67b0883bd6
parentae5db6d12341684913a78b6537c0b9c22c999b5c
um: Ensure that a stub page cannot get unmapped

Trinity discovered an execution path such that a task
can unmap his stub page.

Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
arch/um/kernel/tlb.c