From nobody Sat Nov 30 10:33:35 2024 Received: from mail.rosalinux.ru (mail.rosalinux.ru [195.19.76.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ADA0A185B4F; Tue, 10 Sep 2024 08:37:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.19.76.54 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725957474; cv=none; b=NNt9D4Tl313cEAXaLocxXJV846qJLNdAtQcfELOHQ634Uuj4yvea6738lr/gyptVUOgs+u12WQFZa5HVRzd6y05Jc8EUaLxyJyidBl4Cgzu3Lbz569sMUps3pOvOVRR15e/Hc6y8ZZjpdTs85+zF+jpRXadFxmcS7upYBJCc1X0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725957474; c=relaxed/simple; bh=VgY33WKq4M7AZoWAoxDf6aHPRTan11anSQWyyjX2yTs=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Bsa60I97OJ4Wo9gdxdp95o7lCtmLzIG2CK4sUNjwB+opZE0UxEGAxQNGR5N7ZDa2IKE4QUUwFdoPB2xDpU94pUKfZJfI3z86u8C+Xrgz3RloDJwgsyJGPpHYGJNsgjO+LN+8FnxiI/j6MleFtMHu0e0MbuyVzFWENSsJgBEUQ/I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=rosalinux.ru; spf=pass smtp.mailfrom=rosalinux.ru; dkim=pass (2048-bit key) header.d=rosalinux.ru header.i=@rosalinux.ru header.b=bx+/lKtW; arc=none smtp.client-ip=195.19.76.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=rosalinux.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rosalinux.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=rosalinux.ru header.i=@rosalinux.ru header.b="bx+/lKtW" Received: from localhost (localhost [127.0.0.1]) by mail.rosalinux.ru (Postfix) with ESMTP id 62F0717EB76CF; Tue, 10 Sep 2024 11:37:42 +0300 (MSK) Received: from mail.rosalinux.ru ([127.0.0.1]) by localhost (mail.rosalinux.ru [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id RMIl3gRd53L2; Tue, 10 Sep 2024 11:37:42 +0300 (MSK) Received: from localhost (localhost [127.0.0.1]) by mail.rosalinux.ru (Postfix) with ESMTP id 378DC17EF89EB; Tue, 10 Sep 2024 11:37:42 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.rosalinux.ru 378DC17EF89EB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rosalinux.ru; s=1D4BB666-A0F1-11EB-A1A2-F53579C7F503; t=1725957462; bh=hPSAedrUXh+YSHdaoVA6PILMGeS+TlCtpwfGwxJwoW8=; h=From:To:Date:Message-ID:MIME-Version; b=bx+/lKtWvUqQATZfHdZ9AmLMxh7lEu75ofVHfvBH9q5nxgMmYPrldGanuKsk5a78j hVv286+CwyhTGgHLsHGoYObqJvGdjRMXceBqZyZs61RuUB6qkV0n5r1rcad07pzHTe cEpo2HkMGdA3Ut+2u8bUGOOCXkELuyYW9GYSAbmTiqNBOGxMJjPnLXcdXSvE1pdvgz MeYp426WefZk6px6AUdPiSgQjkFTW91fEyab9LPYBSm0C21AZpBevw+8vEwo0md9kV k4f/bmQbEAw1nTeN9wbUYFq3eQkTE0gvHpLv+3SvWqKDmi7JIVT43QmYnD1X1MdcUt 4uqz0hAOWg6eg== X-Virus-Scanned: amavisd-new at rosalinux.ru Received: from mail.rosalinux.ru ([127.0.0.1]) by localhost (mail.rosalinux.ru [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id VvMrvAcM9zgg; Tue, 10 Sep 2024 11:37:42 +0300 (MSK) Received: from localhost.localdomain (unknown [89.169.48.235]) by mail.rosalinux.ru (Postfix) with ESMTPSA id D99B517EB76CF; Tue, 10 Sep 2024 11:37:41 +0300 (MSK) From: Mikhail Lobanov To: Dan Robertson Cc: Mikhail Lobanov , Jonathan Cameron , Lars-Peter Clausen , Jagath Jog J , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, lvc-project@linuxtesting.org Subject: [PATCH] iio: accel: bma400: Fix uninitialized variable field_value in tap event handling. Date: Tue, 10 Sep 2024 04:36:20 -0400 Message-ID: <20240910083624.27224-1-m.lobanov@rosalinux.ru> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In the current implementation, the local variable field_value is used without prior initialization, which may lead to reading uninitialized memory. Specifically, in the macro set_mask_bits, the initial (potentially uninitialized) value of the buffer is copied into old__, and a mask is applied to calculate new__. A similar issue was resolved in commit 6ee2a7058fea ("iio: accel: bma400: Fix smatch warning based on use of unintialized value."). Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 961db2da159d ("iio: accel: bma400: Add support for single and double= tap events") Signed-off-by: Mikhail Lobanov --- drivers/iio/accel/bma400_core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_cor= e.c index e90e2f01550a..04083b7395ab 100644 --- a/drivers/iio/accel/bma400_core.c +++ b/drivers/iio/accel/bma400_core.c @@ -1219,7 +1219,8 @@ static int bma400_activity_event_en(struct bma400_dat= a *data, static int bma400_tap_event_en(struct bma400_data *data, enum iio_event_direction dir, int state) { - unsigned int mask, field_value; + unsigned int mask; + unsigned int field_value =3D 0; int ret; =20 /* --=20 2.43.0