From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dl1-f51.google.com (mail-dl1-f51.google.com [74.125.82.51]) (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 C7DCA2E888C for ; Tue, 13 Oct 2026 17:17:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.51 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791911857; cv=none; b=dXB97wr3fX4sHY5idfqlXc2wGIWjBHpdpP8aDhdn1IKyut9G98wSs3wtgdgGCKGu/Me00NEXFlQX9BMaaMMzQSnlsieL6EH6TydeC/D72CtQ2X2hmSTN5fBzWAvfNlmux2s2frf73jn+SrltElC7Nip3VNWAG6G5UNxCJQiE8/Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791911857; c=relaxed/simple; bh=+4OV03i0EJVYJAj0s+f12i9tbSSJEF1awclvr/932vA=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=cepYjowt5jNCptTH6GdQ3WEx32vZ6tDbdz9jcxz6RABCrEn9h9XF5HU5gUtrKJsce9u2AJbICsQTG7Eh2utwyHtzGHDWIoTrL9nfJY9GOzuRNSUmk21PD1+A6uxbDzmmzzMmDwZ+EgOMq2j3av3XtlnrtzyN5FyeZ92RGgMFZjY= 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=slmVQe3v; arc=none smtp.client-ip=74.125.82.51 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="slmVQe3v" Received: by mail-dl1-f51.google.com with SMTP id a92af1059eb24-1517bda04a0so2039503c88.0 for ; Tue, 13 Oct 2026 10:17:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1791911854; x=1792516654; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=eattSOlERH03Tw84P2kHaA8gAf3HFT+7yXhlaXTMwtg=; b=slmVQe3v1rYwSkRLjiT4tWub0gGOGc17+s0M8X0PfvchWOFLWdh0r9CZ8Une7c3BRj kWBu6AJMioYjmIBf7GVnHX8WIgdjv7hmB613PX9jc2GL4AgGMWHHuiL1z4AVW+5m37zJ WPozao46eixgByesANgDBkoyz29HL4I3kSVgLo0Q3hTrP6GjoYm2EK9hLElJA/78XR7e S31a01NKsflVtDNAO2w/yGsHkgB7I2ZuC7qJANtPn+4IqL/PjsgpH7LaHFdgSevB+z7r oKvih9yQYgmy78e6RHs3i1OA6CFJTXxBNvGKok2ZwR2gQ8TROTEA2ANVDoSrRRBZolr0 GF3g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1791911854; x=1792516654; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=eattSOlERH03Tw84P2kHaA8gAf3HFT+7yXhlaXTMwtg=; b=IAnI+QGU17VxlZZbdS+VZvEs0Ir4ozXLkR9gneQKnW/GHFClS4jQFeNtZTjEFxPWy8 ao5nwVhC4lodgKZOJyiKHDdiKZ0aJeenBURktDv0NE7xGE/U2DhURs3RMl0F/eBlPYaM Yy7qZR13/viFNgd5VKJke3gsgxG9oiXhge8k3yDFoAlHYl/48Ho+x5CIGUFp+mkDU2iy MFL2TVQi5lS96VCuHMHqf+LBvuWE3fOqFfHrkRNJz+sY4d/1A07E2vmFIW8C6SghZ8oB 94EvyiYs8JZF3wMQ7/xKYi20N2sEimXbhUOHY/4vBlP7elOKxZWbkumddyQ/WEDvRuwX mycw== X-Forwarded-Encrypted: i=1; AKwUvBy4Vz/UAz5PricRIsUMAlxz3dPiwApBInFUaXYZHut2TtocgO5awt+EQ3qGlR4Y9KiGZTXX03mTgmlhO9M=@vger.kernel.org X-Gm-Message-State: AFq9FYLaxCwjHXM2hNiWP9+ysGhjqn89jrQqxVBQml++9ps6HqwplLNA Mzq9soTQNjT/PSUqF2r9LEUf+QTorS9c2AOs0+5jeSMpsB1ox9+UCNs= X-Gm-Gg: AYBFou1QtAnv18qqRpR/UHLZOVTQivTvypkNVgE9zUfEqcEfRSKKKPX2YnkmxoEOXbv DlZ52ZBrd+Y+t1WGksDVUTkycEe/5YuHpgroxi0iCUQv6L6LZ4h4Rklb74D2sGCz45Fb1WVCuvs bBKQ3I88qVi0Ki3s9Nn1/Map8Oe5UTrLA7FZbtC5Nk8poD8IalVSNl9pupc1NhJpctYlYYo2r4x jZ8qCsuOq7oYWahMxiHNLXwkvgsPLKbYDQrTkS/AfS/Vtgatf0x+t+1vBd0L/FYavodICrU+QDt KzJiFyBa/76+j3qYOxL5tlnWXX48KZl+mfId1ixbQ8AMPF/1LazxjNHJy2bgu0cy6JJdYwShymJ yoqEpIsCwCCbdm2atXdugGZdbFH0G/lhg5sjcunlZr7dwha2E4ardK+Dbnyq7LyHDUGPwH2OUuy YKCVVhX2bIWbJS7F4Bk7Wt0ZKmWZrrie1uG2DUb3UN+wA3khUxq4KjrQ47LbcXtUzC5emhT6rK7 54O1G4ipcUswzwtJLwPKzDXogo46oxvwpwdgg== X-Received: by 2002:a05:7022:ea8a:b0:166:3e26:c4b5 with SMTP id a92af1059eb24-16a5bf3ee1emr16409864c88.18.1791911853663; Tue, 13 Oct 2026 10:17:33 -0700 (PDT) Received: from localhost.localdomain ([101.0.62.171]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3537cacb61asm47268839eec.21.2026.10.13.10.17.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Oct 2026 10:17:33 -0700 (PDT) From: Nikhil Gautam To: anshulusr@gmail.com Cc: jic23@kernel.org, dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Nikhil Gautam Subject: [PATCH] iio: chemical: ags02ma: Check for short I2C reads Date: Tue, 13 Oct 2026 22:47:26 +0530 Message-Id: <20261013171726.15670-1-nikhilgtr@gmail.com> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Check that the I2C receive operation transfers the expected number of bytes before accessing the received data. Return -EIO if the transfer is incomplete. Signed-off-by: Nikhil Gautam --- drivers/iio/chemical/ags02ma.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/iio/chemical/ags02ma.c b/drivers/iio/chemical/ags02ma.c index 151178d4e8f4..2219965d044f 100644 --- a/drivers/iio/chemical/ags02ma.c +++ b/drivers/iio/chemical/ags02ma.c @@ -61,6 +61,12 @@ static int ags02ma_register_read(struct i2c_client *client, u8 reg, u16 delay, return ret; } + if (ret != sizeof(read_buffer)) { + dev_err(&client->dev, + "Short read from register 0x%x\n", reg); + return -EIO; + } + crc = crc8(ags02ma_crc8_table, (u8 *)&read_buffer.data, sizeof(read_buffer.data), AGS02MA_CRC8_INIT); if (crc != read_buffer.crc) { -- 2.39.5