linux-kernel - [PATCH 09/10] xen/mmu: Be aware of p2m_[mid

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1292967460-15709-10-git-send-email-konrad.wilk@oracle.com>
Date:	Tue, 21 Dec 2010 16:37:39 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	linux-kernel@...r.kernel.org, jeremy@...p.org, hpa@...or.com
Cc:	Jan Beulich <JBeulich@...ell.com>, xen-devel@...ts.xensource.com,
	Konrad Rzeszutek Wilk <konrad@...nel.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: [PATCH 09/10] xen/mmu: Be aware of p2m_[mid_|]missing when saving/restore.

We did not consider the 1-1 mapping and during restore would
not properly deal with them.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
---
 arch/x86/xen/mmu.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index a917439..b2b8733 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -329,14 +329,13 @@ void xen_build_mfn_list_list(void)
 		 * they're just missing, just update the stored mfn,
 		 * since all could have changed over a migrate.
 		 */
-		if (mid == p2m_mid_identity) {
+		if (mid == p2m_mid_identity || mid == p2m_mid_missing) {
 			BUG_ON(mididx);
 			BUG_ON(mid_mfn_p != p2m_mid_identity_mfn);
 			p2m_top_mfn[topidx] = virt_to_mfn(p2m_mid_identity_mfn);
 			pfn += (P2M_MID_PER_PAGE - 1) * P2M_PER_PAGE;
 			continue;
 		}
-
 		if (mid_mfn_p == p2m_mid_identity_mfn) {
 			/*
 			 * XXX boot-time only!  We should never find
-- 
1.7.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/