From: Marek Szyprowski <m.szyprowski@samsung.com>
Date: Wed, 2 Oct 2019 12:37:20 +0000 (+0200)
Subject: linux_compat: fix potential NULL pointer access
X-Git-Tag: v2020.01-rc2~28^2~7
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=2ad98ab8f68c71e2db140c6d5f1020aa6fbacb9e;p=oweals%2Fu-boot.git

linux_compat: fix potential NULL pointer access

malloc_cache_aligned() might return zero, so fix potential NULL pointer
access if __GFP_ZERO flag is set.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Ralph Siemsen <ralph.siemsen@linaro.org>
---

diff --git a/lib/linux_compat.c b/lib/linux_compat.c
index 6373b4451e..81ea8fb126 100644
--- a/lib/linux_compat.c
+++ b/lib/linux_compat.c
@@ -20,7 +20,7 @@ void *kmalloc(size_t size, int flags)
 	void *p;
 
 	p = malloc_cache_aligned(size);
-	if (flags & __GFP_ZERO)
+	if (p && flags & __GFP_ZERO)
 		memset(p, 0, size);
 
 	return p;