From: Will Deacon <will@kernel.org>
To: David Woodhouse <dwmw2@infradead.org>,
Lu Baolu <baolu.lu@linux.intel.com>,
Joerg Roedel <joro@8bytes.org>,
Robin Murphy <robin.murphy@arm.com>,
iommu@lists.linux.dev, linux-kernel@vger.kernel.org,
lirongqing <lirongqing@baidu.com>
Cc: catalin.marinas@arm.com, kernel-team@android.com,
Will Deacon <will@kernel.org>
Subject: Re: [PATCH] iommu/intel: fix out-of-bounds memset in dmar_latency_disable()
Date: Tue, 21 Jul 2026 13:21:28 +0100 [thread overview]
Message-ID: <178463365358.220184.8467214471810541204.b4-ty@kernel.org> (raw)
In-Reply-To: <20260721093410.2465-1-lirongqing@baidu.com>
On Tue, 21 Jul 2026 17:34:10 +0800, lirongqing wrote:
> dmar_latency_disable() intends to zero out only the single
> latency_statistic entry for the given type, but the memset size was
> computed as sizeof(*lstat) * DMAR_LATENCY_NUM, which clears the entire
> array starting from &lstat[type].
>
> When type > 0, this writes beyond the end of the allocated array,
> corrupting adjacent memory.
>
> [...]
Applied to iommu (fixes), thanks!
[1/1] iommu/intel: fix out-of-bounds memset in dmar_latency_disable()
https://git.kernel.org/iommu/c/754f8efe45f8
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
prev parent reply other threads:[~2026-07-21 12:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-21 9:34 lirongqing
2026-07-21 12:21 ` Will Deacon [this message]
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