From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Sun, 8 Oct 2017 04:57:25 +0000 (+0200)
Subject: efi_selftest: avoid dereferencing NULL in tpl test
X-Git-Tag: v2017.11-rc2~55^2~10
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=7f8ec5b63e5a8774bfcadafbc0d9583686b00455;p=u-boot

efi_selftest: avoid dereferencing NULL in tpl test

The task priority levels test uses two events one passes the
notification counter as context. The other passes NULL.
Both use the same notification function. So we need to check
for NULL here.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
---

diff --git a/lib/efi_selftest/efi_selftest_tpl.c b/lib/efi_selftest/efi_selftest_tpl.c
index 0b78ee7595..b8c0e70262 100644
--- a/lib/efi_selftest/efi_selftest_tpl.c
+++ b/lib/efi_selftest/efi_selftest_tpl.c
@@ -26,7 +26,8 @@ static void EFIAPI notify(struct efi_event *event, void *context)
 {
 	unsigned int *count = context;
 
-	++*count;
+	if (count)
+		++*count;
 }
 
 /*