From: Sergey Dyasli <sergey.dyasli@citrix.com>
To: <xen-devel@lists.xen.org>, <kasan-dev@googlegroups.com>,
<linux-kernel@vger.kernel.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Juergen Gross <jgross@suse.com>,
"Stefano Stabellini" <sstabellini@kernel.org>,
George Dunlap <george.dunlap@citrix.com>,
Ross Lagerwall <ross.lagerwall@citrix.com>,
Sergey Dyasli <sergey.dyasli@citrix.com>
Subject: [RFC PATCH 2/3] xen: teach KASAN about grant tables
Date: Tue, 17 Dec 2019 14:08:03 +0000 [thread overview]
Message-ID: <20191217140804.27364-3-sergey.dyasli@citrix.com> (raw)
In-Reply-To: <20191217140804.27364-1-sergey.dyasli@citrix.com>
From: Ross Lagerwall <ross.lagerwall@citrix.com>
Otherwise it produces lots of false positives.
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: Sergey Dyasli <sergey.dyasli@citrix.com>
---
drivers/xen/grant-table.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index 49b381e104ef..0f844c14d5b9 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -1049,6 +1049,7 @@ int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops,
foreign = xen_page_foreign(pages[i]);
foreign->domid = map_ops[i].dom;
foreign->gref = map_ops[i].ref;
+ kasan_alloc_pages(pages[i], 0);
break;
}
@@ -1085,8 +1086,10 @@ int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops,
if (ret)
return ret;
- for (i = 0; i < count; i++)
+ for (i = 0; i < count; i++) {
ClearPageForeign(pages[i]);
+ kasan_free_pages(pages[i], 0);
+ }
return clear_foreign_p2m_mapping(unmap_ops, kunmap_ops, pages, count);
}
--
2.17.1
next prev parent reply other threads:[~2019-12-17 14:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-17 14:08 [RFC PATCH 0/3] basic KASAN support for Xen PV domains Sergey Dyasli
2019-12-17 14:08 ` [RFC PATCH 1/3] x86/xen: add basic KASAN support for PV kernel Sergey Dyasli
2019-12-18 9:24 ` Jürgen Groß
2019-12-19 16:42 ` Sergey Dyasli
2019-12-20 8:43 ` Jürgen Groß
2019-12-17 14:08 ` Sergey Dyasli [this message]
2019-12-17 14:08 ` [RFC PATCH 3/3] xen/netback: Fix grant copy across page boundary with KASAN Sergey Dyasli
2019-12-17 15:14 ` [Xen-devel] " Durrant, Paul
2020-01-07 10:33 ` Sergey Dyasli
2019-12-17 18:06 ` [RFC PATCH 0/3] basic KASAN support for Xen PV domains Boris Ostrovsky
2019-12-20 10:26 ` Sergey Dyasli
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