Huw Davies : winepulse: Limit Wow64 buffer allocations to 32-bit addresses.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 27cb3324df31af00be16f9262780e3a538a68cc2
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=27cb3324df31af00be16f9262...

Author: Huw Davies 
Date:   Thu Apr 21 15:51:57 2022 +0100

winepulse: Limit Wow64 buffer allocations to 32-bit addresses.

Signed-off-by: Huw Davies 
Signed-off-by: Jacek Caban 
Signed-off-by: Alexandre Julliard

---

dlls/winepulse.drv/pulse.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/dlls/winepulse.drv/pulse.c b/dlls/winepulse.drv/pulse.c
index 06047a21944..9a205915b70 100644
--- a/dlls/winepulse.drv/pulse.c
+++ b/dlls/winepulse.drv/pulse.c
@@ -981,6 +981,15 @@ static HRESULT pulse_stream_connect(struct pulse_stream *stream, const char *pul
     return S_OK;
 }

+static ULONG_PTR zero_bits(void)
+{
+#ifdef _WIN64
+    return !NtCurrentTeb()->WowTebOffset ? 0 : 0x7fffffff;
+#else
+    return 0;
+#endif
+}
+
 static NTSTATUS pulse_create_stream(void *args)
 {
     struct create_stream_params *params = args;
@@ -1039,7 +1048,7 @@ static NTSTATUS pulse_create_stream(void *args)
             size = stream->real_bufsize_bytes =
                 stream->bufsize_frames * 2 * pa_frame_size(&stream->ss);
             if (NtAllocateVirtualMemory(GetCurrentProcess(), (void **)&stream->local_buffer,
-                                        0, &size, MEM_COMMIT, PAGE_READWRITE))
+                                        zero_bits(), &size, MEM_COMMIT, PAGE_READWRITE))
                 hr = E_OUTOFMEMORY;
         } else {
             UINT32 i, capture_packets;
@@ -1053,7 +1062,7 @@ static NTSTATUS pulse_create_stream(void *args)

size = stream->real_bufsize_bytes + capture_packets * sizeof(ACPacket);
             if (NtAllocateVirtualMemory(GetCurrentProcess(), (void **)&stream->local_buffer,
-                                        0, &size, MEM_COMMIT, PAGE_READWRITE))
+                                        zero_bits(), &size, MEM_COMMIT, PAGE_READWRITE))
                 hr = E_OUTOFMEMORY;
             else {
                 ACPacket *cur_packet = (ACPacket*)((char*)stream->local_buffer + stream->real_bufsize_bytes);
@@ -1697,7 +1706,7 @@ static BOOL alloc_tmp_buffer(struct pulse_stream *stream, SIZE_T bytes)
         stream->tmp_buffer_bytes = 0;
     }
     if (NtAllocateVirtualMemory(GetCurrentProcess(), (void **)&stream->tmp_buffer,
-                                0, &bytes, MEM_COMMIT, PAGE_READWRITE))
+                                zero_bits(), &bytes, MEM_COMMIT, PAGE_READWRITE))
         return FALSE;

stream->tmp_buffer_bytes = bytes;