linux-kernel - [PATCH 0/2] Make kcov work properly with KASLR enabled

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Message-Id: <1481417456-28826-1-git-send-email-alex.popov@linux.com>
Date:   Sun, 11 Dec 2016 03:50:54 +0300
From:   Alexander Popov <alex.popov@...ux.com>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh@...nel.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        AKASHI Takahiro <takahiro.akashi@...aro.org>,
        Jon Masters <jcm@...hat.com>,
        David Daney <david.daney@...ium.com>,
        Ganapatrao Kulkarni <gkulkarni@...iumnetworks.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Nicolai Stange <nicstange@...il.com>,
        James Morse <james.morse@....com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Alexander Popov <alex.popov@...ux.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        syzkaller <syzkaller@...glegroups.com>
Subject: [PATCH 0/2] Make kcov work properly with KASLR enabled

If CONFIG_RANDOMIZE_BASE is enabled, kcov currently reports kernel addresses
including the random offset which breaks the coverage-guided fuzzing on x86_64 and
AArch64. Fix that by subtracting kaslr_offset() return value.

Alexander Popov (2):
  arm64: setup: introduce kaslr_offset()
  kcov: make kcov work properly with KASLR enabled

 arch/arm64/include/asm/setup.h      | 19 +++++++++++++++++++
 arch/arm64/include/uapi/asm/setup.h |  4 ++--
 arch/arm64/kernel/setup.c           |  8 ++++----
 kernel/kcov.c                       |  8 +++++++-
 4 files changed, 32 insertions(+), 7 deletions(-)
 create mode 100644 arch/arm64/include/asm/setup.h

-- 
2.7.4