Alistair Leslie-Hughes : ntdll: Check return parameter before use.

[Alexandre Julliard]

Module: wine
Branch: oldstable
Commit: 6d0c0a7ed485fef067e0cdadc2f96bcea6ed674b
URL:    https://gitlab.winehq.org/wine/wine/-/commit/6d0c0a7ed485fef067e0cdadc2f96bc...

Author: Alistair Leslie-Hughes <leslie_alistair(a)hotmail.com>
Date:   Wed Mar  3 08:56:39 2021 +1100

ntdll: Check return parameter before use.

(cherry picked from commit 0cbfd7ab4cd1b4102bfd6204ff4ed64cca8f5b55)
Signed-off-by: Michael Stefaniuc <mstefani(a)winehq.org>

---

 dlls/ntdll/sec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dlls/ntdll/sec.c b/dlls/ntdll/sec.c
index eccfc82ce8c..5c1c9b1fbb0 100644
--- a/dlls/ntdll/sec.c
+++ b/dlls/ntdll/sec.c
@@ -1172,6 +1172,8 @@ NTSTATUS WINAPI RtlAddAce(
 		return STATUS_INVALID_PARAMETER;
 	if (!RtlFirstFreeAce(acl,&targetace))
 		return STATUS_INVALID_PARAMETER;
+	if (!targetace)
+		return STATUS_ALLOTTED_SPACE_EXCEEDED;
 	nrofaces=0;ace=acestart;
 	while (((BYTE *)ace - (BYTE *)acestart) < acelen) {
 		nrofaces++;