From: Richard Turner <rneilturner@gmail.com>
Date: Fri, 8 Oct 2021 13:22:44 +0000 (-0400)
Subject: xenfilt: Move list pointer to next entry when pdo is missing
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=6ac33aebe7ed447f1d1d80a0aefbbda6682b1813;p=pvdrivers%2Fwin%2Fxenbus.git

xenfilt: Move list pointer to next entry when pdo is missing

The pointer to the list of fdo entries is never advanced
when the pdo is missing, causing a BSOD. When a device
is missing, advance the list pointer to the next entry.

Signed-off-by: Richard Turner <turnerr@ainfosec.com>
---

diff --git a/src/xenfilt/fdo.c b/src/xenfilt/fdo.c
index b8cf424..6a45b0f 100644
--- a/src/xenfilt/fdo.c
+++ b/src/xenfilt/fdo.c
@@ -1107,7 +1107,7 @@ FdoQueryDeviceRelations(
                 if (PdoGetDevicePnpState(Pdo) == Deleted)
                     PdoDestroy(Pdo);
 
-                continue;
+                goto next;
             }
 
             if (PdoGetDevicePnpState(Pdo) == Present)
@@ -1116,6 +1116,7 @@ FdoQueryDeviceRelations(
             ObReferenceObject(PdoGetPhysicalDeviceObject(Pdo));
             Relations->Objects[Relations->Count++] = PdoGetPhysicalDeviceObject(Pdo);
 
+next:
             ListEntry = Next;
         }