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(parent: 3cfd4ba) | patch
lguest: fix out-by-one error in address checking.
authorRusty Russell <rusty@rustcorp.com.au>
Wed, 27 May 2015 01:29:26 +0000 (10:59 +0930)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 27 May 2015 16:57:21 +0000 (09:57 -0700)
commit83a35114d0e4583e6b0ca39502e68b6a92e2910c
treef6a10dde40090d72e1dae2911057b3208d959415tree | snapshot (tar.gz zip)
parent3cfd4ba7d37b52eb965ed05209647072932dfd0acommit | diff
lguest: fix out-by-one error in address checking.

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>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/lguest/core.c diff | blob | blame | history