kasan: add test for vmalloc (06513916) · Commits · 戴 / test

Test kasan vmalloc support by adding a new test to the module. Link: http://lkml.kernel.org/r/20191031093909.9228-3-dja@axtens.net Signed-off-by:

Daniel Axtens <dja@axtens.net> Reviewed-by:

Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Alexander Potapenko <glider@google.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by:

Andrew Morton <akpm@linux-foundation.org> Signed-off-by:

Linus Torvalds <torvalds@linux-foundation.org>

lib/test_kasan.c

+26 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@
		#include <linux/string.h>
		#include <linux/uaccess.h>
		#include <linux/io.h>
		#include <linux/vmalloc.h>

		#include <asm/page.h>

		@@ -748,6 +749,30 @@ static noinline void __init kmalloc_double_kzfree(void)
		kzfree(ptr);
		}

		#ifdef CONFIG_KASAN_VMALLOC
		static noinline void __init vmalloc_oob(void)
		{
		void *area;

		pr_info("vmalloc out-of-bounds\n");

		/*
		* We have to be careful not to hit the guard page.
		* The MMU will catch that and crash us.
		*/
		area = vmalloc(3000);
		if (!area) {
		pr_err("Allocation failed\n");
		return;
		}

		((volatile char *)area)[3100];
		vfree(area);
		}
		#else
		static void __init vmalloc_oob(void) {}
		#endif

		static int __init kmalloc_tests_init(void)
		{
		/*
		@@ -793,6 +818,7 @@ static int __init kmalloc_tests_init(void)
		kasan_strings();
		kasan_bitops();
		kmalloc_double_kzfree();
		vmalloc_oob();

		kasan_restore_multi_shot(multishot);

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