[PATCH v3 0/1] MR2439: ntoskrnl: Free memory before pointer gets set to NULL.

[Bernhard Übelacker (＠bernhardu)]

Without this patch the memory pointed to by context->in_buff
gets leaked on each call to GetVolumeInformationByHandleW
and the memory usage of winedevice.exe grows.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52322

--
  v3: ntoskrnl: Do not leak memory by setting input buffer to NULL.

https://gitlab.winehq.org/wine/wine/-/merge_requests/2439

[PATCH v3 1/1] ntoskrnl: Do not leak memory by setting input buffer to NULL.

[Bernhard Übelacker]

From: Bernhard Übelacker

Without this patch the memory pointed to by context->in_buff
gets leaked on each call to GetVolumeInformationByHandleW
and the memory usage of winedevice.exe grows.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52322
---
 dlls/ntoskrnl.exe/ntoskrnl.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index 2d506402036..02b58d1311e 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -832,7 +832,6 @@ static NTSTATUS dispatch_volume( struct dispatch_context *context )
     irp->Tail.Overlay.Thread = (PETHREAD)KeGetCurrentThread();
     irp->Tail.Overlay.OriginalFileObject = file;
     irp->RequestorMode = UserMode;
-    context->in_buff = NULL;

irp->Flags |= IRP_DEALLOCATE_BUFFER;  /* deallocate out_buff */
     return dispatch_irp( device, irp, context );

[Bernhard Übelacker (＠bernhardu)]

On Sat Apr 15 13:20:49 2023 +0000, Bernhard Übelacker wrote:
> changed this line in [version 3 of the diff](/wine/wine/-/merge_requests/2439/diffs?diff_id=42578&start_sha=1a30d59d3227cd9f0a0e5c00cdaf0039fbaca8ae#3eb3d3add1e5d8cfd0ee9f9e23d3c3e84cc1580d_836_835)

Thanks for looking into it. That is way better. I modified the patch as you suggested and rebased it to wine-8.6.