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Fri, 31 Jul 2020 06:20:58 -0700 (PDT) Date: Fri, 31 Jul 2020 15:20:41 +0200 In-Reply-To: Message-Id: <403b259f1de49a7a3694531c851ac28326a586a8.1596199677.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.28.0.163.g6104cc2f0b6-goog Subject: [PATCH 4/4] kasan: adjust kasan_stack_oob for tag-based mode From: Andrey Konovalov To: Andrew Morton Cc: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Marco Elver , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Walter Wu , Elena Petrova , Vincenzo Frascino , Catalin Marinas , Andrey Konovalov X-Rspamd-Queue-Id: BD8D918026B1B X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Use OOB_TAG_OFF as access offset to land the access into the next granule. Suggested-by: Walter Wu Signed-off-by: Andrey Konovalov --- lib/test_kasan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/test_kasan.c b/lib/test_kasan.c index f362f2662938..53e953bb1d1d 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -488,7 +488,7 @@ static noinline void __init kasan_global_oob(void) static noinline void __init kasan_stack_oob(void) { char stack_array[10]; - volatile int i = 0; + volatile int i = OOB_TAG_OFF; char *p = &stack_array[ARRAY_SIZE(stack_array) + i]; pr_info("out-of-bounds on stack\n");