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Date: Sun, 12 Apr 2026 15:50:05 +0300
From: Leon Romanovsky <leon@kernel.org>
To: Junrui Luo <moonafterrain@outlook.com>
Cc: Chengchang Tang <tangchengchang@huawei.com>,
	Junxian Huang <huangjunxian6@hisilicon.com>,
	Jason Gunthorpe <jgg@ziepe.ca>, Xi Wang <wangxi11@huawei.com>,
	Weihang Li <liweihang@huawei.com>, Wei Xu <xuwei5@hisilicon.com>,
	Shengming Shu <shushengming1@huawei.com>,
	linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
	Yuhao Jiang <danisjiang@gmail.com>, stable@vger.kernel.org
Subject: Re: [PATCH] RDMA/hns: fix out-of-bounds write in IRQ array during
 configuration
Message-ID: <20260412125005.GB21470@unreal>
References: <SYBPR01MB7881512F49EA80F0146EEEA1AF5CA@SYBPR01MB7881.ausprd01.prod.outlook.com>
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In-Reply-To: <SYBPR01MB7881512F49EA80F0146EEEA1AF5CA@SYBPR01MB7881.ausprd01.prod.outlook.com>

On Sun, Apr 05, 2026 at 04:15:44PM +0800, Junrui Luo wrote:
> hns_roce_hw_v2_get_cfg() writes IRQ vector numbers into hr_dev->irq[]
> using handle->rinfo.num_vectors as the loop bound. num_vectors originates
> from firmware via hclge_query_pf_resource() without validation against
> the array size.
> 
> If firmware reports more than 128 MSI-X vectors for RoCE, the loop
> overflows hr_dev->irq[], corrupting adjacent struct members in the
> heap-allocated hns_roce_dev structure.

Is this an actual issue, or just another imagined problem?

Thanks