From: Tim Deegan <tim@xen.org>
To: xen-devel@lists.xen.org
Subject: [PATCH 1/9] x86/mm: Don't dereference p2m pointer before NULL check.
Date: Thu, 12 Sep 2013 13:15:22 +0100 [thread overview]
Message-ID: <1378988130-24172-2-git-send-email-tim@xen.org> (raw)
In-Reply-To: <1378988130-24172-1-git-send-email-tim@xen.org>
Not a security bug, because in fact this is never called with a NULL
argument.
Coverity CID 1055955
Signed-off-by: Tim Deegan <tim@xen.org>
---
xen/arch/x86/mm/p2m.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c
index f5ddd20..8f380ed 100644
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -453,7 +453,7 @@ void p2m_teardown(struct p2m_domain *p2m)
* We know we don't have any extra mappings to these pages */
{
struct page_info *pg;
- struct domain *d = p2m->domain;
+ struct domain *d;
unsigned long gfn;
p2m_type_t t;
mfn_t mfn;
@@ -461,6 +461,8 @@ void p2m_teardown(struct p2m_domain *p2m)
if (p2m == NULL)
return;
+ d = p2m->domain;
+
p2m_lock(p2m);
/* Try to unshare any remaining shared p2m entries. Safeguard
--
1.7.10.4
next prev parent reply other threads:[~2013-09-12 12:15 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-12 12:15 More Coverity-reported issues Tim Deegan
2013-09-12 12:15 ` Tim Deegan [this message]
2013-09-12 12:15 ` [PATCH 2/9] passthrough/amd: Drop unnecessary lock lookup Tim Deegan
2013-09-12 13:35 ` Jan Beulich
2013-09-12 12:15 ` [PATCH 3/9] passthrough/amd: Missing 'break' Tim Deegan
2013-09-17 15:04 ` Suravee Suthikulpanit
2013-09-12 12:15 ` [PATCH 4/9] passthrough/amd: Shuffle declaration Tim Deegan
2013-09-12 13:38 ` Jan Beulich
2013-09-12 13:44 ` Tim Deegan
2013-09-12 14:03 ` Jan Beulich
2013-09-17 15:19 ` Suravee Suthikulpanit
2013-09-12 12:15 ` [PATCH 5/9] cpufreq: avoid integer overflows Tim Deegan
2013-09-12 13:49 ` Jan Beulich
2013-09-13 7:18 ` Liu, Jinsong
2013-09-12 12:15 ` [PATCH 6/9] cpufreq: missing check of copy_from_guest() Tim Deegan
2013-09-12 13:54 ` Jan Beulich
2013-09-13 7:18 ` Liu, Jinsong
2013-09-12 12:15 ` [PATCH 7/9] ehci-dbgp: avoid division by zero Tim Deegan
2013-09-12 13:55 ` Jan Beulich
2013-09-12 12:15 ` [PATCH 8/9] ehci-dbgp: drop dead code Tim Deegan
2013-09-12 14:01 ` Jan Beulich
2013-09-12 12:15 ` [PATCH 9/9] acpi/pmstat: fix check for empty name strings Tim Deegan
2013-09-12 14:02 ` Jan Beulich
2013-09-12 13:11 ` More Coverity-reported issues Andrew Cooper
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