From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=217.140.110.172 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793814517; b=KZDj8LwUAWycu41wh0CsGeKI1PgUhn1gqCRJPls5GImQ9xO+Wc5/1AcijGK+bwUE5Vru YQ4NVD+OnZIJLeUX5GIQrHLMUdKyqh/+EYukkMU2fGzHsZbO14P2O9FTvV/PM1CpXuQ1V hsiyEjJlCZqPMMAeu0qcQO6N/rL3IF5poT73i7rse57Kzpa1K1+9tvNlTz0wLV6llaByW fc0/Xbe3AOUypvLjsho7PolI6/STLWqyUnholrx99X6zbFeRMKUG3+ylytczqaXWkuaDc xD+O/DQM2q95dPDhYGJfXCfyrLmG9/3GiVpsxOw/yV8i+Dh2bXlGOMhM+Hmh9MJ/i3g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793814517; h=DMARC-Filter:Received:Received:DKIM-Signature:From:Date:Subject: MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id: References:In-Reply-To:To:Cc:X-Mailer; bh=+nqxLnunkD+W7y8PwJCbzFzrKYsNzLwDLLWVvZu3tI0=; b=Ov5BTMmcXdgWMIzZnz3AtYWse+zDXpqEhQtppgXSy5lyv0nYBGeYx7mFxdBdlTnF0RR7 EgkddBTgE0IAkOlmivYBzbc2PyP57Le/iaFlASFbitotKHbOGV1MGEbkwjeTgwyF4j78t r/7rJG6Z7S/h2mFtAeLseU+4wLaC+zty6kWPREwnshAFOjdLGEz2wQNK2plPoWnkZA/qN 9nbrXz1RgTGlwPT8ctQvUPA/PXuYMZ/NzNHgvFj6IO5JbqtOBlZ/gWAw0jGwWk3rudMbB lAki0JaRzI/WC6QaiBeYVG0Nt+HjjVnJJzBZtSQyKkY8tyr/bsbn1/Kw/yA+9mCMfnQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=W8gctpxQ; arc=none smtp.remote-ip=217.140.110.172 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 77CD66083607 for ; Wed, 4 Nov 2026 17:48:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 77CD66083607 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=W8gctpxQ Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D531F1BB2; Wed, 4 Nov 2026 09:48:32 -0800 (PST) Received: from e133894.arm.com (e133894.arm.com [10.2.80.62]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9BFA13F673; Wed, 4 Nov 2026 09:48:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1793814515; bh=Yfm8aqG7wkiGaNfDQlOqhwrvFMRVy3XZyB6DejKX+y0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=W8gctpxQo6TNeVUz3GI3xE9Dxj98600XXbTwm6TkbbBGmKuaaRYeK4z3xq15kEom1 JKpHAAjYvISd1FSPySimJWERj31GCd0MS809eawC0CjYxj5hHJXDENZSka2NOsQOD0 o8z/pDExYvHbSm1e1YvwaPHmrAGcr+Ybp0IlmziE= From: Sascha Bischoff Date: Wed, 04 Nov 2026 17:48:03 +0000 Subject: [PATCH v2 09/10] irqchip/gic-v5: Clean the allocated linear device table size X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261104-host_gicv5_fixes-v2-9-e47ad20ea3c8@arm.com> References: <20261104-host_gicv5_fixes-v2-0-e47ad20ea3c8@arm.com> In-Reply-To: <20261104-host_gicv5_fixes-v2-0-e47ad20ea3c8@arm.com> To: Marc Zyngier , Lorenzo Pieralisi , Thomas Gleixner , Radu Rendec , Timothy Hayes , Catalin Marinas , Jonathan Cameron , "Rafael J. Wysocki" Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sascha Bischoff X-Mailer: b4 0.15.2 When the linear device table exceeds the kmalloc limit, the driver caps the DeviceID width before allocation but keeps the original size for cache maintenance. On a noncoherent ITS, this cleans beyond the allocated table. Recalculate the size after capping the DeviceID width. Fixes: 57d72196dfc85 ("irqchip/gic-v5: Add GICv5 ITS support") Signed-off-by: Sascha Bischoff --- drivers/irqchip/irq-gic-v5-its.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/irqchip/irq-gic-v5-its.c b/drivers/irqchip/irq-gic-v5-its.c index 4de07bbdc4923..aebab9f306476 100644 --- a/drivers/irqchip/irq-gic-v5-its.c +++ b/drivers/irqchip/irq-gic-v5-its.c @@ -594,14 +594,14 @@ static int gicv5_its_alloc_devtab_linear(struct gicv5_its_chip_data *its, * kmalloc limits so that the system can chug along with a linear * device table. */ - sz = BIT_ULL(device_id_bits) * sizeof(*devtab); - if (sz > KMALLOC_MAX_SIZE) { - u8 device_id_cap = ilog2(KMALLOC_MAX_SIZE/sizeof(*devtab)); + if (BIT_ULL(device_id_bits) * sizeof(*devtab) > KMALLOC_MAX_SIZE) { + u8 device_id_cap = ilog2(KMALLOC_MAX_SIZE / sizeof(*devtab)); pr_warn("Limiting device ID bits from %u to %u\n", device_id_bits, device_id_cap); device_id_bits = device_id_cap; } + sz = BIT_ULL(device_id_bits) * sizeof(*devtab); devtab = kcalloc(BIT(device_id_bits), sizeof(*devtab), GFP_KERNEL); if (!devtab) -- 2.34.1