[reactos] 01/01: [NTOS:IO] Do not set Shared property of the file if we are failing in IoCheckShareAccess

[Jérôme Gardou]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=1d1dba51db2208e300570…

commit 1d1dba51db2208e300570c58ffe2272e0c34a1a8
Author:     Jérôme Gardou <jerome.gardou(a)reactos.org>
AuthorDate: Mon Dec 14 15:51:15 2020 +0100
Commit:     Jérôme Gardou <jerome.gardou(a)reactos.org>
CommitDate: Tue Dec 22 11:05:00 2020 +0100

    [NTOS:IO] Do not set Shared property of the file if we are failing in
IoCheckShareAccess
---
 ntoskrnl/io/iomgr/file.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/ntoskrnl/io/iomgr/file.c b/ntoskrnl/io/iomgr/file.c
index 5004938c099..548c7f28db7 100644
--- a/ntoskrnl/io/iomgr/file.c
+++ b/ntoskrnl/io/iomgr/file.c
@@ -3429,11 +3429,6 @@ IoCheckShareAccess(IN ACCESS_MASK DesiredAccess,
         SharedWrite = (DesiredShareAccess & FILE_SHARE_WRITE) != 0;
         SharedDelete = (DesiredShareAccess & FILE_SHARE_DELETE) != 0;
 
-        /* Set them */
-        FileObject->SharedRead = SharedRead;
-        FileObject->SharedWrite = SharedWrite;
-        FileObject->SharedDelete = SharedDelete;
-
         /* Check if the shared access is violated */
         if ((ReadAccess &&
              (ShareAccess->SharedRead < ShareAccess->OpenCount)) ||
@@ -3449,6 +3444,11 @@ IoCheckShareAccess(IN ACCESS_MASK DesiredAccess,
             return STATUS_SHARING_VIOLATION;
         }
 
+        /* Set them */
+        FileObject->SharedRead = SharedRead;
+        FileObject->SharedWrite = SharedWrite;
+        FileObject->SharedDelete = SharedDelete;
+
         /* It's not, check if caller wants us to update it */
         if (Update)
         {