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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id v9sm5393520pga.82.2021.08.17.23.24.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Aug 2021 23:24:12 -0700 (PDT) From: Kees Cook To: linux-kernel@vger.kernel.org Cc: Kees Cook , Stefan Achatz , Jiri Kosina , Benjamin Tissoires , linux-input@vger.kernel.org, "Gustavo A. R. Silva" , Greg Kroah-Hartman , Andrew Morton , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-staging@lists.linux.dev, linux-block@vger.kernel.org, linux-kbuild@vger.kernel.org, clang-built-linux@googlegroups.com, Rasmus Villemoes , linux-hardening@vger.kernel.org Subject: [PATCH v2 55/63] HID: roccat: Use struct_group() to zero kone_mouse_event Date: Tue, 17 Aug 2021 23:05:25 -0700 Message-Id: <20210818060533.3569517-56-keescook@chromium.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210818060533.3569517-1-keescook@chromium.org> References: <20210818060533.3569517-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1908; h=from:subject; bh=1pufhTOQ+Ev1TBqsKxncMFoRA1ZRswld+5UcgY3UHPc=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBhHKMqezgIdICqUvusV3uxfFgc/NzjoDMPzoTPLXKQ ysx/Q+WJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYRyjKgAKCRCJcvTf3G3AJvMhD/ 4/FvXFOoXTIkumS1QqMpAFhaJGCKF+0RDx/z48DGYo98kCwWG6ybzb+3Sly47Z+VgrSp0nI5xp/nwa 7vzRFjBAI8F/fZVbUlI8Z/Fya+aZbPEeiEK947R3H8Wbap6uVAex0YjyWhhrJ5ZvwN2gBayJJ1WAXz +0fz1YMH8bcbhmSMSRON2ZGR1UjjBuaTH+o0ighQljGy5YLUHHZ+P4xNS0whZ8d+THVIEhrrdzHdRV xQ+rSGFdrgJR7xYVHqTNDyySccjRR12fCgsnFgzx2wmvqD6usQbAtioyZ5ZCTcNXNfyyvHgd++uCyK e638UGzfpOzM5vUWRjmLl1KeEBbobuCg3sgk1AQzR2mUpn6cvbWbZbOyGlGZtTdTn7wCe/qfq120Ud zfBKERaOR0vpEYpiRESonq/qBjud3tRwJ0H/FhwsbPbp2lo15qfYimJ41SEC1abj3Da1Xu61TlMqEd S5Rzg+maFwNcx3sFBdUId31vsspRp/LAtiMPvI3MalLGcTxm9Gdf8i9hEI2yM8v6QUVUqBl/F6N1uW 0dr4/U6A89Pj+zJUWKnGqTw3EZAQEgK5Lbi/njYrrq3JeohlG7jtmoxQDLp3fMw23TORKszxjv3y76 kDqBN4o2faONCRYDcPk3N/ArWnW2NiFPXTb3nBBeYGgetTCuosxxzdiUWWLg== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org In preparation for FORTIFY_SOURCE performing compile-time and run-time field bounds checking for memset(), avoid intentionally writing across neighboring fields. Add struct_group() to mark region of struct kone_mouse_event that should be initialized to zero. Cc: Stefan Achatz Cc: Jiri Kosina Cc: Benjamin Tissoires Cc: linux-input@vger.kernel.org Signed-off-by: Kees Cook --- drivers/hid/hid-roccat-kone.c | 2 +- drivers/hid/hid-roccat-kone.h | 12 +++++++----- 2 files changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/hid/hid-roccat-kone.c b/drivers/hid/hid-roccat-kone.c index 1ca64481145e..ea17abc7ad52 100644 --- a/drivers/hid/hid-roccat-kone.c +++ b/drivers/hid/hid-roccat-kone.c @@ -857,7 +857,7 @@ static int kone_raw_event(struct hid_device *hdev, struct hid_report *report, memcpy(&kone->last_mouse_event, event, sizeof(struct kone_mouse_event)); else - memset(&event->tilt, 0, 5); + memset(&event->wipe, 0, sizeof(event->wipe)); kone_keep_values_up_to_date(kone, event); diff --git a/drivers/hid/hid-roccat-kone.h b/drivers/hid/hid-roccat-kone.h index 4a1a9cb76b08..65c800e3addc 100644 --- a/drivers/hid/hid-roccat-kone.h +++ b/drivers/hid/hid-roccat-kone.h @@ -152,11 +152,13 @@ struct kone_mouse_event { uint16_t x; uint16_t y; uint8_t wheel; /* up = 1, down = -1 */ - uint8_t tilt; /* right = 1, left = -1 */ - uint8_t unknown; - uint8_t event; - uint8_t value; /* press = 0, release = 1 */ - uint8_t macro_key; /* 0 to 8 */ + struct_group(wipe, + uint8_t tilt; /* right = 1, left = -1 */ + uint8_t unknown; + uint8_t event; + uint8_t value; /* press = 0, release = 1 */ + uint8_t macro_key; /* 0 to 8 */ + ); } __attribute__ ((__packed__)); enum kone_mouse_events {