[win-pv-devel] [PATCH 4/4] Cancel all outstanding IRPs on StreamDestroy

[<owen.smith@xxxxxxxxxx>]

From: Owen Smith <owen.smith@xxxxxxxxxx>

After IRP_MJ_CLEANUP completes, all outstanding IRPs (for that FileObject)
are cancelled. This would attempt to use the cancel safe queue and list
which are now zeroed, and lead to a 0xCC Bugcheck.

Signed-off-by: Owen Smith <owen.smith@xxxxxxxxxx>
---
 src/xencons/stream.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/xencons/stream.c b/src/xencons/stream.c
index 0f4c129..02bb486 100644
--- a/src/xencons/stream.c
+++ b/src/xencons/stream.c
@@ -188,7 +188,7 @@ StreamCsqCompleteCanceledIrp(
     Irp->IoStatus.Information = 0;
     Irp->IoStatus.Status = STATUS_CANCELLED;
 
-    Trace("COMPLETE (%02x:%s)\n",
+    Trace("CANCELLED (%02x:%s)\n",
           MajorFunction,
           MajorFunctionName(MajorFunction));
 
@@ -418,6 +418,18 @@ StreamDestroy(
     ThreadJoin(Stream->Thread);
     Stream->Thread = NULL;
 
+    for (;;) {
+        PIRP            Irp;
+
+        Irp = IoCsqRemoveNextIrp(&Stream->Csq, NULL);
+        if (Irp == NULL)
+            break;
+
+        StreamCsqCompleteCanceledIrp(&Stream->Csq,
+                                     Irp);
+    }
+    ASSERT(IsListEmpty(&Stream->List));
+
     RtlZeroMemory(&Stream->Csq, sizeof (IO_CSQ));
 
     RtlZeroMemory(&Stream->List, sizeof (LIST_ENTRY));
-- 
2.8.3


_______________________________________________
win-pv-devel mailing list
win-pv-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/cgi-bin/mailman/listinfo/win-pv-devel