From patchwork Sat Nov 23 20:05:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raag Jadav X-Patchwork-Id: 845148 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.18]) (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 6E580EADC; Sat, 23 Nov 2024 20:06:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732392368; cv=none; b=O5Ry7xXHU2mvhCSiglDzrAc/1xehr00WurxhfaQAbm27LdNGw1eoLLe0614Vv7Z6CdUSLrF6RQTier53StK9+aBufF4P6ez8bYyb2HPIaUz2jZAQx/Kl5fTeS4r+/CHue63dmNV0+KCHhWTq3hRHhZ+wlUbCZ4xK6GuyO3dztXE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732392368; c=relaxed/simple; bh=GAVRYml17ZCCg2g/TqAnTGzAqhZE9Ak/JKtz3LbjUIM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=qFjoPs9ns+LF6SqB3V4ny/8FZ4uGb3I0agGoWtsS6QxO1+QSjLEfurXuDiFI4N+c1wcrfr+Fi/DHDQhQoL+xb5Y4uwyaCoWV6johsSBpTPBMNIKgDPbMCmjOB45Tphm8QyuRZDyQfrzVAXt2EEkLDjNYiX6/YaEY5j8I8K4Tm1g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=none smtp.mailfrom=ecsmtp.iind.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=gu1woTtP; arc=none smtp.client-ip=198.175.65.18 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ecsmtp.iind.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="gu1woTtP" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1732392368; x=1763928368; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GAVRYml17ZCCg2g/TqAnTGzAqhZE9Ak/JKtz3LbjUIM=; b=gu1woTtPHUUACHYyz2OhodXXZNhApq3G8bnxPdncV1aRSw4Yv4v1o3e2 0wR0ZHxailJ4AChuYMUw0+vUjK1ydaIkrqD55aZ0YLs6ytXM/EkWHYEhs +fCDXe7DfBG6rMkyuG6/x1cHDArwzLHG8OESAgg1OpBEmKTMji8Hf5n4Q rS5aqohgmvx8INms8a1kuqvvtUK0dQFmJn8u8ZIOxvy62xeNbQIjWqbLF F4CowKVtCrYJwM6htLxsczuRUSOc47qPmW8exssonhppRljK+H8Ou6Lp4 QVaG2uevdQG3qbopgIZ7GsUEkvyvHMoXRvMasOzyD3asQiE/h8oQCof03 g==; X-CSE-ConnectionGUID: zgcox2U0Tb+b+nBOs4uqbg== X-CSE-MsgGUID: NNvXVSc8S8OmEnjTpe1mmw== X-IronPort-AV: E=McAfee;i="6700,10204,11265"; a="32678533" X-IronPort-AV: E=Sophos;i="6.12,179,1728975600"; d="scan'208";a="32678533" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa110.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Nov 2024 12:06:07 -0800 X-CSE-ConnectionGUID: zBITnaUiQJmn8IRYzPjQhw== X-CSE-MsgGUID: 5h/8vyTRTrqbkDar/CjIZg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,179,1728975600"; d="scan'208";a="121737991" Received: from inesxmail01.iind.intel.com ([10.223.57.40]) by orviesa002.jf.intel.com with ESMTP; 23 Nov 2024 12:06:04 -0800 Received: from inlubt0316.iind.intel.com (inlubt0316.iind.intel.com [10.191.20.213]) by inesxmail01.iind.intel.com (Postfix) with ESMTP id 0CB611CAD1; Sun, 24 Nov 2024 01:36:03 +0530 (IST) Received: by inlubt0316.iind.intel.com (Postfix, from userid 12101951) id F18BD160010E; Sun, 24 Nov 2024 01:36:02 +0530 (IST) From: Raag Jadav To: gregkh@linuxfoundation.org, linus.walleij@linaro.org, mika.westerberg@linux.intel.com, andriy.shevchenko@linux.intel.com, dmitry.torokhov@gmail.com, broonie@kernel.org, pierre-louis.bossart@linux.dev Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, linux-sound@vger.kernel.org, Raag Jadav Subject: [PATCH v1 1/5] devres: Introduce devm_kmemdup_array() Date: Sun, 24 Nov 2024 01:35:23 +0530 Message-Id: <20241123200527.7830-2-raag.jadav@intel.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20241123200527.7830-1-raag.jadav@intel.com> References: <20241123200527.7830-1-raag.jadav@intel.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Introduce '_array' variant of devm_kmemdup() for the users which lack multiplication overflow check. Suggested-by: Andy Shevchenko Signed-off-by: Raag Jadav --- include/linux/device.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/linux/device.h b/include/linux/device.h index b4bde8d22697..c31f48d0dde0 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -358,6 +358,16 @@ char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp) __malloc; const char *devm_kstrdup_const(struct device *dev, const char *s, gfp_t gfp); void *devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp) __realloc_size(3); +static inline void *devm_kmemdup_array(struct device *dev, const void *src, + size_t n, size_t size, gfp_t flags) +{ + size_t bytes; + + if (unlikely(check_mul_overflow(n, size, &bytes))) + return NULL; + + return devm_kmemdup(dev, src, bytes, flags); +} unsigned long devm_get_free_pages(struct device *dev, gfp_t gfp_mask, unsigned int order);