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d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=OJV+wFsSuBAEdua9Kpud4j6ZGzVdRXqmU9/PZhjVLdc=; b=pXpZNNTNa0q0aZRbUAPI/KBJq80+DSPxzHGifNsX+11wRS4EXXH6X/iu68CJ6p+fNM vFFxltc1vsTltAROrkxFG2UNgWhJ7fpjx+BbVtw4s11jukGSD+ceALuiqLL0G3UL8wPp DVdZoUC8HPyGT+HQboOn0hwhHclq8BGajlcbemVgOq+fnBARsQhDpZIGDZbx8sN7bzQC z7X7XC3yfHpnTYMeon/aYf0MR/adUpEQ2NRYtfn8cfPiB6d0c0NmRn3sYCH16HHo77R4 QLgI87z3QAX61ds3MH5c1zfKnsdGnqCzJ9a4YaVV20QMU6HxbwMwdz+Z+CX2QVG5qwSl /q9w== X-Gm-Message-State: AOAM532TH/ogEFM6WQcbNlY3dIGInYatkW5F4V6MD7lWh4t4w1r6bVGE g4i2yC9hmJL1oQeGotYEHfakVViyay2TR3ax X-Google-Smtp-Source: ABdhPJxMCD1uy5OtH/rfQcGvmBrhxSjZNftrKmDoPQf463mdE8fRrlNv8GbsPVw+FCZ38SV1RL/Err4XbOOp0GEM X-Received: by 2002:a0c:b604:: with SMTP id f4mr15297001qve.68.1596544904936; Tue, 04 Aug 2020 05:41:44 -0700 (PDT) Date: Tue, 4 Aug 2020 14:41:28 +0200 In-Reply-To: Message-Id: <3063ab1411e92bce36061a96e25b651212e70ba6.1596544734.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.28.0.163.g6104cc2f0b6-goog Subject: [PATCH v2 5/5] kasan: adjust kasan_stack_oob for tag-based mode From: Andrey Konovalov To: Andrew Morton Cc: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Marco Elver , Ard Biesheuvel , Arvind Sankar , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, Walter Wu , Elena Petrova , Vincenzo Frascino , Catalin Marinas , Andrey Konovalov Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 3CC1516A040 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 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 7674616d0c37..5d3f496893ef 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"); -- 2.28.0.163.g6104cc2f0b6-goog