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[2003:f6:af49:8100:e5be:2e2b:db52:54b6]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47a82cb12fbsm10202915e9.0.2025.12.09.13.05.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Dec 2025 13:05:26 -0800 (PST) Date: Tue, 9 Dec 2025 22:05:25 +0100 (CET) From: Sebastian Ott To: Robin Murphy cc: linux-nvme@lists.infradead.org, iommu@lists.linux.dev, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, Jens Axboe , Christoph Hellwig , Will Deacon , Carlos Maiolino Subject: Re: WARNING: drivers/iommu/io-pgtable-arm.c:639 In-Reply-To: <4386e0f7-9e45-41d2-8236-7133d6d00610@arm.com> Message-ID: <99e12a04-d23f-f9e7-b02e-770e0012a794@redhat.com> References: <170120f7-dd2c-4d2a-d6fc-ac4c82afefd7@redhat.com> <4386e0f7-9e45-41d2-8236-7133d6d00610@arm.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: goSYvx29rqXyabQu_P4SpMglCu_lagsOEF9W4VqC4rA_1765314328 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII; format=flowed On Tue, 9 Dec 2025, Robin Murphy wrote: > On 2025-12-09 11:43 am, Sebastian Ott wrote: >> Hi, >> >> got the following warning after a kernel update on Thurstday, leading to a >> panic and fs corruption. I didn't capture the first warning but I'm pretty >> sure it was the same. It's reproducible but I didn't bisect since it >> borked my fs. The only hint I can give is that v6.18 worked. Is this a >> known issue? Anything I should try? > > nvme_unmap_data() is attempting to unmap an IOVA that was never mapped, or > has already been unmapped by someone else. That's a usage bug. OK, that's what I suspected - thanks for the confirmation! I did another repro and tried: good: 44fc84337b6e Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux bad: cc25df3e2e22 Merge tag 'for-6.19/block-20251201' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux I'll start bisecting between these 2 - hoping it doesn't fork up my root fs again... Thanks, Sebastian