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

[Alexandre Julliard]

Module: wine
Branch: master
Commit: d47bdb3eb270b31d2c507a91a49ede20f4cdf2aa
URL:    https://gitlab.winehq.org/wine/wine/-/commit/d47bdb3eb270b31d2c507a91a49ede2...

Author: Tim Clem 
Date:   Tue Nov  8 13:44:00 2022 -0800

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

BaseAddress + 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 4d3bb90386a..8396b2de334 100644
--- a/dlls/wow64/virtual.c
+++ b/dlls/wow64/virtual.c
@@ -399,6 +399,8 @@ NTSTATUS WINAPI wow64_NtQueryVirtualMemory( UINT *args )
                 info32->State = info.State;
                 info32->Protect = info.Protect;
                 info32->Type = info.Type;
+                if ((ULONG_PTR)info.BaseAddress + info.RegionSize > highest_user_address)
+                    info32->RegionSize = highest_user_address - (ULONG_PTR)info.BaseAddress + 1;
             }
         }
         res_len = sizeof(MEMORY_BASIC_INFORMATION32);