lguest: fix out-by-one error in address checking.

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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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Rusty Russell 2015-05-27 10:59:26 +09:30 • committed by Greg Kroah-Hartman

parent 1330ac1cd7

commit e93327e02e

1 changed files with 1 additions and 1 deletions

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drivers/lguest/core.c

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