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Fri, 24 Oct 2025 09:31:49 -0700 (PDT) From: Askar Safin To: gmazyland@gmail.com Cc: Dell.Client.Kernel@dell.com, brauner@kernel.org, dm-devel@lists.linux.dev, ebiggers@kernel.org, kix@kix.es, linux-block@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-crypto@vger.kernel.org, linux-lvm@lists.linux.dev, linux-mm@kvack.org, linux-pm@vger.kernel.org, linux-raid@vger.kernel.org, lvm-devel@lists.linux.dev, mzxreary@0pointer.de, nphamcs@gmail.com, pavel@ucw.cz, rafael@kernel.org, ryncsn@gmail.com, safinaskar@gmail.com, torvalds@linux-foundation.org Subject: Re: dm bug: hibernate to swap located on dm-integrity doesn't work (how to get data redundancy for swap?) Date: Fri, 24 Oct 2025 19:31:42 +0300 Message-ID: <20251024163142.376903-1-safinaskar@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Milan Broz : > Hi, I just wrote script for reproduction of this bug in Qemu: https://zerobin.net/?4e742925aedbecc6#BX3Tulvp7E3gKhopFKrx/2ZdOelMyYk1qOyitcOr1h8= Just run it, and you will reproduce this bug, too. Also, I just reproduced it on current master (43e9ad0c55a3). Here is output of this script on master: https://zerobin.net/?68ef6601ab203a11#7zBZ44AaVKmvRq161MJaOXIXY/5Hiv+hRUxWoqyZ7uE= As you can see, hibernate succeeds, but resume fails so: + blkid --match-tag TYPE --output value /dev/mapper/early-swap + TYPE=swap + echo 'Type: swap' Type: swap + echo /dev/mapper/early-swap [ 0.446545] PM: Image not found (code -22) Also, I just noticed that the bug sometimes reproduces, and sometimes not. Still it reproduces more than 50% of time. Also, you will find backtrace in logs above. Disregard it. I think this is just some master bug, which is unrelated to our dm-integrity bug. I will answer to rest of your letter later. Also, I saw patch, I will test it later. -- Askar Safin