linux/drivers/lguest/core.c
Rusty Russell 69fb957fba lguest: fix out-by-one error in address checking.
commit 83a35114d0 upstream.

This bug has been there since day 1; addresses in the top guest physical
page weren't considered valid.  You could map that page (the check in
check_gpte() is correct), but if a guest tried to put a pagetable there
we'd check that address manually when walking it, and kill the guest.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
2015-06-03 14:30:03 +01:00

373 lines
10 KiB