Sebastian Lackner : ntdll: Avoid crash when trying to access page prot of address beyond address space limit.
Alexandre Julliard
julliard at winehq.org
Thu Nov 16 15:21:09 CST 2017
Module: wine
Branch: master
Commit: 959d240cbe5f13612ee7fb6fc0aaaef87c436118
URL: http://source.winehq.org/git/wine.git/?a=commit;h=959d240cbe5f13612ee7fb6fc0aaaef87c436118
Author: Sebastian Lackner <sebastian at fds-team.de>
Date: Thu Nov 16 14:14:01 2017 +0100
ntdll: Avoid crash when trying to access page prot of address beyond address space limit.
Signed-off-by: Alexandre Julliard <julliard at winehq.org>
---
dlls/ntdll/virtual.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index d28b138..21ccdaa 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -185,6 +185,7 @@ static BYTE get_page_vprot( const void *addr )
size_t idx = (size_t)addr >> page_shift;
#ifdef _WIN64
+ if ((idx >> pages_vprot_shift) >= pages_vprot_size) return 0;
if (!pages_vprot[idx >> pages_vprot_shift]) return 0;
return pages_vprot[idx >> pages_vprot_shift][idx & pages_vprot_mask];
#else
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