From nobody Tue Jun 9 00:59:05 2026 Received: from mail-wm1-f42.google.com (mail-wm1-f42.google.com [209.85.128.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2BCD13CDBA8 for ; Mon, 25 May 2026 07:15:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779693352; cv=none; b=jJRrI91fUF/u+WFjJ7nLblgUBzN2xlKe8xz+AfbxpI371AN2P6pEU64IdyC4M7uzAXKAYjLU+EDt1BX2DIwH5lhZqsESOXdQ559bklToFc65UJK5XwrnVRVXxCtWtkZnYjR6dsKRVFnAxxRSfQbgiG2CvXVLIhzpUfnyjtBeg0o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779693352; c=relaxed/simple; bh=YegoUY1WOra81ZJDMWmsFQL7QyD8XZV45AdFQTMRDlw=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=EsDOgl7b0QnIZ8ut2qm6nm2ezgxMBJYnk+szu1sRo8BJY7txkW6O9BccKnc3ZQHwIfhYuTi5Dt7Vn1BZUQF43PzwhNOYTOY0fD5Di4XnQxvN87H5EmYctGQnfAs4e2wj0BUVaQ+e4tByAUDxI6YPHTK0qWFsRHrn4Egaw2lYv4A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Ex1VZgbD; arc=none smtp.client-ip=209.85.128.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Ex1VZgbD" Received: by mail-wm1-f42.google.com with SMTP id 5b1f17b1804b1-49050ff7cbdso16052155e9.2 for ; Mon, 25 May 2026 00:15:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1779693349; x=1780298149; darn=vger.kernel.org; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :from:to:cc:subject:date:message-id:reply-to; bh=d4IiAvs5dhCMh+Wco8JSSp9GyVxeLnxNjl/psVDXbZs=; b=Ex1VZgbDTEpykX8792C59n1z7SZQFvBpT4H+tYeCj4UhRZC/2ML97TrQhp+TSN5TYu PklbH6O4NSlkt5ag8+cUvRjkqYySotXsqFXpMj2aIt1xzr+IjUrZA5xay1FATTLQXXhK +S+1nGXR/NqOUrJD5aUwIYJivWUZgBWBYWFeZ1CM84xPSpCYODqKRa81oZmwHPuhkAbk QKAv9yNERr7WhygBOCJktGbO3JK8lxXSTnPCHbDhcI/uzN1TFnZWDpuoou1NGn3JLUKE Amrxz8NaDRH4vcMEtbJA5o3tjgUA5MGLMjalVuajsDpsK747lhxMtbX1nGJx92t1KaOE HCKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779693349; x=1780298149; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=d4IiAvs5dhCMh+Wco8JSSp9GyVxeLnxNjl/psVDXbZs=; b=QzQKoa2dcYB4uAo9weghJxh1WdeGM/mt9j1PPqN34zhUtWidXgrRYxMhWdRy7Jt7bZ Q14YRDU3Za15NWn/6RTzCWI1szOfkG3tPHWtwK3XPvOmDpdETgm8m5CFyMWLKeLstkSa X7D/zvURS/FLHixv/pcimHKzRFlif8rO0vHwi/2Dg0T/S5FfaW1Csr+s69QqdZ0Vd7pt gHZhF5MgMH/qhWPqjpJt+3ehAU1BVG5oA8rEcWFrQxOpwg2WGm0DID8iuf+9JGs9NLvV xgjOaRpmgn2rIkzI+w0zeqryNQk/gMgtnL2v5VR3CujnfcTJcHM+cJDSN0zlSgug39FJ +5+w== X-Forwarded-Encrypted: i=1; AFNElJ8nYtgGPpur7JZMQXh4+0q9F3eNiuz0TF7Ilsu0GeK2f8e3gUZ5aCLozcLxzLpOLRSGVD9uahOKjxhzvh0=@vger.kernel.org X-Gm-Message-State: AOJu0YzTsmKmK3hhNzQU+5U4oqdpH0Qjw+9AgbchB5yLEYU69l3GXap1 75q4dkI/yI0aban0qsm5mgwKvESCk/5uPEI8UjhbA3Z9TJj5C2ZDCEhw X-Gm-Gg: Acq92OH7erCym7rzT52ULdWLRpIJsqVDIX715D/bFcSVX6V9OHnGVL7XLa1WWiWJEJ6 Sg4Rz9K/nn0vAyLXbpX8XATV+dBPruav6lV6TNAtYILSnIWpVtUHeflmUCTtxPO31PCy1hpRaqH 3OIkLLZaxdEcUvmMW48nmxhFBHeN62PJZ80Fw9Isft6u9WrK6F9UJUON2/hMyH81Tsowsmv7pV7 hHBO8sWCuHF1mw25/9iODokzeOM5kRAbRXGnGY3ilxU4Uq+kcv1qL9tMK3zL1dihFcGuWvJURXY aJbJfa7uYR5x9DL70Ile7uVCHzS2CPUGT4czTL3bbvPsncRZzdbwq5XOrwPtOIGbzFinVq6FXjK 3IUEQXbXPmO3d85vIHhyZ+dQYLBKSHLecRDsubO0Dgs/h6xKMdVLGW9LfO6MV37arjtg31/Dqdu cfjG56ul2szrp4rPr9w1mD/zzQqQO7Y9BVmw== X-Received: by 2002:a05:600c:a106:b0:48a:9562:7a30 with SMTP id 5b1f17b1804b1-490426dcb09mr144718745e9.24.1779693349423; Mon, 25 May 2026 00:15:49 -0700 (PDT) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-490454a0b82sm243462295e9.9.2026.05.25.00.15.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 May 2026 00:15:48 -0700 (PDT) Date: Mon, 25 May 2026 10:15:46 +0300 From: Dan Carpenter To: Angelo Dureghello Cc: Nuno =?iso-8859-1?Q?S=E1?= , Michael Hennerich , Jonathan Cameron , David Lechner , Andy Shevchenko , linux@analog.com, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH] iio: dac: ad3552r-hs: fix uninitialized data ni ad3552r_hs_write_data_source() Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" If the *ppos value is non-zero then the simple_write_to_buffer() function won't initialized the start of the buf[] buffer. Non-zero values for *ppos won't work here generally, so just test for them and return -EINVAL at the start of the function. Fixes: b1c5d68ea66e ("iio: dac: ad3552r-hs: add support for internal ramp") Signed-off-by: Dan Carpenter Reviewed-by: Angelo Dureghello --- drivers/iio/dac/ad3552r-hs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/dac/ad3552r-hs.c b/drivers/iio/dac/ad3552r-hs.c index a9578afa7015..6bc64f53bce9 100644 --- a/drivers/iio/dac/ad3552r-hs.c +++ b/drivers/iio/dac/ad3552r-hs.c @@ -549,7 +549,7 @@ static ssize_t ad3552r_hs_write_data_source(struct file= *f, =20 guard(mutex)(&st->lock); =20 - if (count >=3D sizeof(buf)) + if (*ppos !=3D 0 || count >=3D sizeof(buf)) return -ENOSPC; =20 ret =3D simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, userbuf, --=20 2.53.0