Tim Clem : wow64: Truncate too-large regions from NtQueryVirtualMemory(MemoryRegionInformation).

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 06321ba57b17635cf2bd945ce38d2c95367b2156
URL:    https://gitlab.winehq.org/wine/wine/-/commit/06321ba57b17635cf2bd945ce38d2c9...

Author: Tim Clem <tclem(a)codeweavers.com>
Date:   Tue Nov  8 13:51:40 2022 -0800

wow64: Truncate too-large regions from NtQueryVirtualMemory(MemoryRegionInformation).

AllocationBase + RegionSize should not exceed the highest WoW user
address.

---

 dlls/wow64/virtual.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dlls/wow64/virtual.c b/dlls/wow64/virtual.c
index f9a0e0b6bc8..c41d0a930ca 100644
--- a/dlls/wow64/virtual.c
+++ b/dlls/wow64/virtual.c
@@ -444,6 +444,8 @@ NTSTATUS WINAPI wow64_NtQueryVirtualMemory( UINT *args )
                 info32->CommitSize = info.CommitSize;
                 info32->PartitionId = info.PartitionId;
                 info32->NodePreference = info.NodePreference;
+                if ((ULONG_PTR)info.AllocationBase + info.RegionSize > highest_user_address)
+                    info32->RegionSize = highest_user_address - (ULONG_PTR)info.AllocationBase + 1;
             }
         }
         res_len = sizeof(MEMORY_REGION_INFORMATION32);