From nobody Fri Jul 24 23:31:00 2026 Received: from cstnet.cn (smtp25.cstnet.cn [159.226.251.25]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8442B33A9D6 for ; Wed, 22 Jul 2026 04:14:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784693692; cv=none; b=XlqLUhfUozsZUOYS3FP0OtVJmoxf5XE5oSEMfTNHN3pRWlpYjPMR5sekHPKL+kjCwfxlBx9bz5rCWt938Np8Bs6/zDRXEKMMgIJEVJh8AxIsapw4K4wXqSpUEE2PILvpw1kydlrlyFpE0nELoqby9X2fA3eMBwrnDNBUlUH35Js= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784693692; c=relaxed/simple; bh=xmXV0+l8RrxGVMYNxp1UFpb0+H9L2dPkMiSPX3rTv3g=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=j2DQNd+KEVwoXLuPc2X2Il2WFZQNJSjCwRfrdRK5Fqp5HclaLYW4YKSKwFK/vGUJetCpFn5okTxpcKrjQMFUxR3A2OyjeJeSv4/fYJWAHdVjmM6HDVS1k5ID0FaYxKiNM8dtJhxD+cmYRuRFyBCrJcCeQ/bZwKnHErYKmNVj0KU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from localhost.localdomain (unknown [111.196.245.140]) by APP-05 (Coremail) with SMTP id zQCowAC3JD+0Q2BqaCa7AA--.23602S2; Wed, 22 Jul 2026 12:14:44 +0800 (CST) From: Pengpeng Hou To: Mark-PK Tsai Cc: Daniel Palmer , Thomas Gleixner , Matthias Brugger , AngeloGioacchino Del Regno , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Pengpeng Hou Subject: [PATCH] irqchip/mst-intc: reject ranges beyond saved state capacity Date: Wed, 22 Jul 2026 12:14:43 +0800 Message-ID: <20260722041443.10020-1-pengpeng@iscas.ac.cn> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: zQCowAC3JD+0Q2BqaCa7AA--.23602S2 X-Coremail-Antispam: 1UD129KBjvdXoWrury3Jw48Cw48Wry7WryrtFb_yoWDArX_u3 W5uan7Gr1rKFn5JF97tr17Zry0yF9ruF4qgwnYv3W3JryfW3WrGF1UX3sYya1xuF4Fyr1x CryYvrW0kr9FkjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb4AFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_ Gr1UM28EF7xvwVC2z280aVAFwI0_Cr1j6rxdM28EF7xvwVC2z280aVCY1x0267AKxVWxJr 0_GcWle2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_JF0_Jw1lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJV W8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lc7CjxVAaw2AFwI0_ Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67 AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIY rxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_JFI_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14 v26F4j6r4UJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_ Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7VUbtxhJ UUUUU== X-CM-SenderInfo: pshqw1xhqjqxpvfd2hldfou0/ Content-Type: text/plain; charset="utf-8" The inclusive Device Tree IRQ range determines nr_irqs. Suspend and resume then use nr_irqs to walk the fixed saved_status array, which has MST_INTC_MAX_IRQS entries. A descending range underflows the unsigned subtraction, while a range wider than 64 entries exceeds that array. Reject both forms before deriving nr_irqs. Signed-off-by: Pengpeng Hou --- drivers/irqchip/irq-mst-intc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/irqchip/irq-mst-intc.c b/drivers/irqchip/irq-mst-intc.c index b5335f6fd6d6..1475335d668d 100644 --- a/drivers/irqchip/irq-mst-intc.c +++ b/drivers/irqchip/irq-mst-intc.c @@ -263,6 +263,10 @@ static int __init mst_intc_of_init(struct device_node = *dn, of_property_read_u32_index(dn, "mstar,irqs-map-range", 1, &irq_end)) return -EINVAL; =20 + if (irq_end < irq_start || + irq_end - irq_start >=3D MST_INTC_MAX_IRQS) + return -EINVAL; + cd =3D kzalloc_obj(*cd); if (!cd) return -ENOMEM; --=20 2.43.0