Commit 01c7344e authored Aug 14, 2025 by Junjie Cao Committed by Kees Cook Sep 08, 2025

lkdtm: fortify: Fix potential NULL dereference on kmalloc failure



Add missing NULL pointer checks after kmalloc() calls in
lkdtm_FORTIFY_STR_MEMBER() and lkdtm_FORTIFY_MEM_MEMBER() functions.

Signed-off-by: Junjie Cao <junjie.cao@intel.com>
Link: https://lore.kernel.org/r/20250814060605.5264-1-junjie.cao@intel.com


Signed-off-by: Kees Cook <kees@kernel.org>

parent c17b750b

drivers/misc/lkdtm/fortify.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -44,6 +44,9 @@ static void lkdtm_FORTIFY_STR_MEMBER(void)
		char *src;

		src = kmalloc(size, GFP_KERNEL);
		if (!src)
		return;

		strscpy(src, "over ten bytes", size);
		size = strlen(src) + 1;

		@@ -109,6 +112,9 @@ static void lkdtm_FORTIFY_MEM_MEMBER(void)
		char *src;

		src = kmalloc(size, GFP_KERNEL);
		if (!src)
		return;

		strscpy(src, "over ten bytes", size);
		size = strlen(src) + 1;