From nobody Wed Sep 30 11:55:58 2026 Received: from sg-2-4.ptr.blmpb.com (sg-2-4.ptr.blmpb.com [71.18.227.4]) (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 9F7C62D1F44 for ; Sat, 8 Aug 2026 22:19:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=71.18.227.4 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786227548; cv=none; b=rw8bUnPeOwne9ss6fQOtO/IT+VkIs2DGdySE4QVImOPN9RYrASrJtUNGMz241QRSTNV7Js4VW66oKNlg4PKemRkPfFu3orQP42sr2/HJOT0caoYddZD3wQONK0BlF40WfYTqzk5BLPBVf+f5gU34DKzHZu8kjMr2D7vEp+FnkLE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786227548; c=relaxed/simple; bh=nyNP1EIU64FB3gZQkwJA9AoNKA1IzECGx1ODnGbi9pA=; h=Date:Message-Id:To:Content-Type:Cc:From:Mime-Version:Subject; b=Ay0n30Wr1ZSjN6cbKrIEiWABY6MQx0jHfqypm3qrsd/+jBzvc9wSg6zdXrj9Jr9lIrO3l5WWDo+3Zisay7t5A1khPdfRZ+kxtf6hwJGTiiEck1oye96ro14y4kOA31tqJcBT92weC+bGUnwNjjnAgPISZpPYQFldK/XKDZf9Bdc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=cherr.cc; spf=pass smtp.mailfrom=cherr.cc; dkim=pass (2048-bit key) header.d=cherr.cc header.i=@cherr.cc header.b=UwEzGs1a; arc=none smtp.client-ip=71.18.227.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=cherr.cc Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=cherr.cc Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=cherr.cc header.i=@cherr.cc header.b="UwEzGs1a" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; s=feishu2604220257; d=cherr.cc; t=1786227540; h=from:subject: mime-version:from:date:message-id:subject:to:cc:reply-to:content-type: mime-version:in-reply-to:message-id; bh=H1jmvl9NxK4FHPKbYDO1LavDSQSk2jduKWVtCmnCi/Q=; b=UwEzGs1aazYPvjRMSbumMm4Rl2lslVMzyiDqgDJmjxl+Vc+JrH2iJlxciA7/NxfF/6rvTv Z/4kRzE4fh2SCWVWaabmtEJkygAndvn1607zd6OhuoyrXrDUElCYhTgomEqNietqs6giSb R2elBFho9UCFdTezK69jKpATQP6KKJxjfp/n4+SbAHFAunPuEcGrV2WyzSs6sKh7qQA0yd lL5tqRBEFf8T+wBqwG2a04SMi51YK07Okrxdv2GPOwAXfKy3E1866z02YGaMO3YuOSfKVg ZyFEjoOob1C+cUmKZqX0Ztfk7MG+Orit5KlsfTClHFAmYTWhZS2VSdoVJUwTXw== Date: Sun, 09 Aug 2026 06:18:51 +0800 Message-Id: <20260809-adxl380-fifo-clamp-v1-1-780d86ef25eb@cherr.cc> Received: from [192.168.9.107] ([111.42.148.29]) by smtp.feishu.cn with ESMTPS; Sun, 09 Aug 2026 06:18:58 +0800 To: =?utf-8?q?Nuno_S=C3=A1?= , "Michael Hennerich" , "Ramona Gradinariu" , "Antoniu Miclaus" , "Jonathan Cameron" , "David Lechner" , "Andy Shevchenko" X-B4-Tracking: v=1; b=H4sIAEqrd2oC/x3MTQqAIBBA4avErBuYisq6SrQwHWvAflCIILx70 vJbvPdC5CAcYSxeCHxLlPPIqMoCzKaPlVFsNtRUd6RoQG0f3yhCJ+5E4/V+oaNetz3ZoVsqyOE V2MnzT6c5pQ+8kjGXZAAAAA== X-Mailer: b4 0.14.2 X-Change-Id: 20260809-adxl380-fifo-clamp-f07a570d96b1 X-Lms-Return-Path: Content-Transfer-Encoding: quoted-printable Cc: , , , "Jonathan Cameron" , , "Shengzhuo Wei" From: "Shengzhuo Wei" Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Subject: [PATCH] iio: accel: adxl380: clamp FIFO sample count X-Original-From: Shengzhuo Wei Content-Type: text/plain; charset="utf-8" The FIFO entry count is a 9-bit device-reported value and can therefore be as large as 511. fifo_buf[], however, only has room for ADXL380_FIFO_SAMPLES (315) entries. After rounding the count down to a multiple of fifo_set_size, adxl380_irq_handler() uses it directly as the length of a bulk FIFO read. If the reported count exceeds ADXL380_FIFO_SAMPLES, this can overflow fifo_buf. Clamp the reported entry count to the size of fifo_buf before rounding it down. Fixes: df36de13677a ("iio: accel: add ADXL380 driver") Cc: stable@vger.kernel.org Assisted-by: GLM:5.2 Signed-off-by: Shengzhuo Wei --- drivers/iio/accel/adxl380.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/iio/accel/adxl380.c b/drivers/iio/accel/adxl380.c index 7dca5523091fc4c6a3c3bf7e388d5d0d507bee19..8a9d82e1d882aa45721013590ec= bd86b083a15a6 100644 --- a/drivers/iio/accel/adxl380.c +++ b/drivers/iio/accel/adxl380.c @@ -966,6 +966,7 @@ static irqreturn_t adxl380_irq_handler(int irq, void *= p) if (ret) return IRQ_HANDLED; =20 + fifo_entries =3D min(fifo_entries, ADXL380_FIFO_SAMPLES); fifo_entries =3D rounddown(fifo_entries, st->fifo_set_size); ret =3D regmap_noinc_read(st->regmap, ADXL380_FIFO_DATA, &st->fifo_buf, sizeof(*st->fifo_buf) * fifo_entries); --- base-commit: 848acc8ffe1b7cd5f1bf427b93069becfebc2c9d change-id: 20260809-adxl380-fifo-clamp-f07a570d96b1 Best regards, --=20 Shengzhuo Wei