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AJvYcCWfpwT4r2FUqXzoSYIe6CBGGGb4vEk3jHYYu0ntElX20AqnWSPcg25XUYw3OzA7MpNGjhaTdn5xxwrZdGbQAfXRTnY2i0q3gQmJE+D/ X-Gm-Message-State: AOJu0Yy9+BRrALfPYUIWy6WanulYf0v1/GER4a0n6wKLHRZ/8qafTvac 8TkEySu0IxPkyW8OOmyoim1KtnKS/pjWHJtszmBJLUV9L5FUvx+wWzeS96XAw3lc0j0q6Yo3f69 kKfs/YJZpM8BrulWzi1M2rFuMAhFrVBuM9h5z X-Received: by 2002:a05:6214:4697:b0:6ab:7234:4c85 with SMTP id 6a1803df08f44-6aecd6a1df6mr170529226d6.32.1717513638178; Tue, 04 Jun 2024 08:07:18 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <4c05efefe278bc5b140dba40eb1d195cceb2e6ce.1717507310.git.dvyukov@google.com> In-Reply-To: <4c05efefe278bc5b140dba40eb1d195cceb2e6ce.1717507310.git.dvyukov@google.com> From: Alexander Potapenko Date: Tue, 4 Jun 2024 17:06:41 +0200 Message-ID: Subject: Re: [PATCH 4/4] x86: Ignore stack unwinding in KCOV To: Dmitry Vyukov Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, linux-kernel@vger.kernel.org, syzkaller@googlegroups.com, elver@google.com, nogikh@google.com, tarasmadan@google.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, Jun 4, 2024 at 3:45=E2=80=AFPM 'Dmitry Vyukov' via syzkaller wrote: > > Stack unwinding produces large amounts of uninteresting coverage. > It's called from KASAN kmalloc/kfree hooks, fault injection, etc. > It's not particularly useful and is not a function of system call args. > Ignore that code. > > Signed-off-by: Dmitry Vyukov > Cc: x86@kernel.org > Cc: linux-kernel@vger.kernel.org > Cc: syzkaller@googlegroups.com Reviewed-by: Alexander Potapenko