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Sun, 05 Apr 2026 21:25:33 -0700 (PDT) Received: from c7-smtp-2023.dev.purestorage.com ([208.88.159.128]) by smtp-relay.gmail.com with ESMTPS id 00721157ae682-7a3703113ecsm8745177b3.14.2026.04.05.21.25.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 05 Apr 2026 21:25:33 -0700 (PDT) X-Relaying-Domain: purestorage.com Received: from dev-ushankar.dev.purestorage.com (dev-ushankar.dev.purestorage.com [10.7.70.36]) by c7-smtp-2023.dev.purestorage.com (Postfix) with ESMTP id 7106C34057B; Sun, 5 Apr 2026 22:25:31 -0600 (MDT) Received: by dev-ushankar.dev.purestorage.com (Postfix, from userid 1557716368) id 51BC5E54F2C; Sun, 5 Apr 2026 22:25:31 -0600 (MDT) From: Uday Shankar Subject: [PATCH v2 0/2] ublk: fix infinite loop in ublk server teardown Date: Sun, 05 Apr 2026 22:25:29 -0600 Message-Id: <20260405-cancel-v2-0-02d711e643c2@purestorage.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIALk102kC/2WMyw6CMBBFf4XM2po+oFFX/Idh0ZYBJtGWtNpoS P/dwtblubnnbJAwEia4NRtEzJQo+Ary1IBbjJ+R0VgZJJeat1wxZ7zDB7NWGyGvslOtg3peI07 0OUL3ofJC6RXi9+hmsa9/iSwYZxeNndFWjcpM/fqOuGtmxrMLTxhKKT/pkSuiogAAAA== X-Change-ID: 20260403-cancel-bb6a1292534c To: Ming Lei , "zhang, the-essence-of-life" , Caleb Sander Mateos , Jens Axboe , Shuah Khan Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Uday Shankar X-Mailer: b4 0.14.2 Fix an infinite loop in ublk server teardown which can arise when a ublk server dies while recovering a device. Also add a test which demonstrates the problem and verifies the fix. Signed-off-by: Uday Shankar --- Changes in v2: - Add support for batched fetch in pre_fetch_io (Ming Lei) - Link to v1: https://lore.kernel.org/r/20260403-cancel-v1-0-86e5a6b3d3af@purestorage.com --- Uday Shankar (2): ublk: reset per-IO canceled flag on each fetch selftests: ublk: test that teardown after incomplete recovery completes drivers/block/ublk_drv.c | 21 ++++++---- tools/testing/selftests/ublk/Makefile | 1 + tools/testing/selftests/ublk/fault_inject.c | 52 +++++++++++++++++++++++-- tools/testing/selftests/ublk/kublk.c | 7 ++++ tools/testing/selftests/ublk/kublk.h | 3 ++ tools/testing/selftests/ublk/test_generic_17.sh | 35 +++++++++++++++++ 6 files changed, 108 insertions(+), 11 deletions(-) --- base-commit: cdd71b7feb3674d14c5edd9c133242ddf9a363f2 change-id: 20260403-cancel-bb6a1292534c Best regards, -- Uday Shankar