linux-kernel - BUG: KASAN lib/test

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Date:   Sat, 05 Dec 2020 00:26:10 +0530
From:   Jeffrin Jose T <jeffrin@...agiritech.edu.in>
To:     aryabinin@...tuozzo.com, Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>
Cc:     kasan-dev@...glegroups.com, lkml <linux-kernel@...r.kernel.org>
Subject: BUG: KASAN   lib/test_kasan.c

hello,

 detected   KASAN   BUG

[ related information ]

-------------------x-------------------x------------------------>
[   43.616259] BUG: KASAN: vmalloc-out-of-bounds in
vmalloc_oob+0x146/0x2c0

(gdb) l *vmalloc_oob+0x146/0x2c0
0xffffffff81b8b0b0 is in vmalloc_oob (lib/test_kasan.c:764).
759		kfree_sensitive(ptr);
760		KUNIT_EXPECT_KASAN_FAIL(test, kfree_sensitive(ptr));
761	}
762	
763	static void vmalloc_oob(struct kunit *test)
764	{
765		void *area;
766	
767		if (!IS_ENABLED(CONFIG_KASAN_VMALLOC)) {
768			kunit_info(test, "CONFIG_KASAN_VMALLOC is not
enabled.");
(gdb) l *vmalloc_oob+0x146
0xffffffff81b8b1f6 is in vmalloc_oob (lib/test_kasan.c:779).
774		 * The MMU will catch that and crash us.
775		 */
776		area = vmalloc(3000);
777		KUNIT_ASSERT_NOT_ERR_OR_NULL(test, area);
778	
779		KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char
*)area)[3100]);
780		vfree(area);
781	}
782	
783	static struct kunit_case kasan_kunit_test_cases[] = {
----------------x-----------------------------x-------------------->

Reported by: Jeffrin Jose T <jeffrin@...agiritech.edu.in>

-- 
software engineer
rajagiri school of engineering and technology - autonomous