[reactos] 01/04: [NTDLL:LDR] Fail if section creation fails in LdrpCreateDllSection. CORE-17284

[Thomas Faber]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=1c404d838a7a681f825c4…

commit 1c404d838a7a681f825c42d6bf9f317008173239
Author:     Thomas Faber <thomas.faber(a)reactos.org>
AuthorDate: Sun Sep 27 16:41:34 2020 +0200
Commit:     Thomas Faber <thomas.faber(a)reactos.org>
CommitDate: Sat Oct 3 13:10:09 2020 +0200

    [NTDLL:LDR] Fail if section creation fails in LdrpCreateDllSection. CORE-17284
    
    Otherwise we'd call ZwQuerySection on an invalid handle and get:
    (ntoskrnl/mm/section.c:4320) Failed to reference section: 0xc0000008
    
    Also correctly check DllCharacteristics: If the argument is missing, the
    file is _not_ a system file, i.e. we should check for restrictions.
---
 dll/ntdll/ldr/ldrutils.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/dll/ntdll/ldr/ldrutils.c b/dll/ntdll/ldr/ldrutils.c
index 7f04bb46055..5b1ec30e525 100644
--- a/dll/ntdll/ldr/ldrutils.c
+++ b/dll/ntdll/ldr/ldrutils.c
@@ -641,10 +641,12 @@ LdrpCreateDllSection(IN PUNICODE_STRING FullName,
 
         /* Increment the error count */
         if (LdrpInLdrInit) LdrpFatalHardErrorCount++;
+
+        goto Exit;
     }
 
     /* Check for Safer restrictions */
-    if (DllCharacteristics &&
+    if (!DllCharacteristics ||
         !(*DllCharacteristics & IMAGE_FILE_SYSTEM))
     {
         /* Make sure it's executable */
@@ -683,6 +685,7 @@ LdrpCreateDllSection(IN PUNICODE_STRING FullName,
         }
     }
 
+Exit:
     /* Close the file handle, we don't need it */
     NtClose(FileHandle);