[reactos] 02/02: [MOUNTMGR] Don't overrun output buffer in QueryPointsFromMemory

[Pierre Schweitzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=ff19ce934bf35768e3478b...

commit ff19ce934bf35768e3478bf484ed4935bb826eb3
Author:     Pierre Schweitzer [e-mail]
AuthorDate: Fri Sep 6 08:30:18 2019 +0200
Commit:     Pierre Schweitzer [e-mail]
CommitDate: Fri Sep 6 08:30:18 2019 +0200

[MOUNTMGR] Don't overrun output buffer in QueryPointsFromMemory
---
 drivers/filters/mountmgr/point.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/filters/mountmgr/point.c b/drivers/filters/mountmgr/point.c
index 77fc6fba95f..4c1d843db50 100644
--- a/drivers/filters/mountmgr/point.c
+++ b/drivers/filters/mountmgr/point.c
@@ -342,6 +342,8 @@ QueryPointsFromMemory(IN PDEVICE_EXTENSION DeviceExtension,

if (MountPoints->Size > Stack->Parameters.DeviceIoControl.OutputBufferLength)
     {
+        Irp->IoStatus.Information = sizeof(MOUNTMGR_MOUNT_POINTS);
+
         return STATUS_BUFFER_OVERFLOW;
     }