From patchwork Fri May 24 09:57:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 13672980 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 925B96EB4B; Fri, 24 May 2024 09:57:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716544651; cv=none; b=ZWm5wWl/sbPjpItVqTeu6u49cOcM4fdERn20SzBFUcUCMWK9RSgA5ZaXGuRWZKmWZs9BZcLu6dZqmS6hzg0VhhoNssXKm9IWjORKtPzk+p+6Q88xRlEGaSi0CXexF9R2uhaNOQkhMzlmepK7es6lrNC+hJaq64tdBeDlcq2uPTQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716544651; c=relaxed/simple; bh=0I5cynNuv4Dqoo8JVCmRAMY1lrY77SMZfnx0Lml79J8=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=I7aMk387+2Gu0IfO24HcW7232N1nR5c4m1NTJmTsm//pq3OG5VLqVUX7KddFdZMKR/KOemeA+1h3yPSxCUF589QvXhLlbbfbSJyalN9XYVM3ehqHN7N8epk0HwEQV11DCLy9cPSziCQKNMVZuZHoIu9yJX5DGv5n3fARlCwiXrc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=h25GUNVV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="h25GUNVV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 83F9DC32782; Fri, 24 May 2024 09:57:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1716544651; bh=0I5cynNuv4Dqoo8JVCmRAMY1lrY77SMZfnx0Lml79J8=; h=From:To:Cc:Subject:Date:From; b=h25GUNVVXnGAz7NN901F73xRDLbA9VJkR9d27xkSTED8eQ+uOdJSZrr4Jee1TT1hs hAg422BBJooBBHQVPDVQnm8gzTfcIiEJHIfCgGgfQWevhrCg9s0KPF8IkltU2BBzKe YG8OPG1bNgPv3ibhcMFrpy6W57rjvTbaYTd2zcO1OnD+rsXtq2yEJVasMnXBSfhrhV HvY3EFB6bRJOEqaIN59Dw82ZF/HKZ+3YdTgKqtDjIZ7tm33cQNldA3cJK6CuGrKhLQ vFIjPVjf7jdepB8qVfegDinHFb8EMqFJ0M+4bErFdGzxWwDzO1eRARovLsqKhqM937 PDH5GCemNpASw== From: Hannes Reinecke To: Jens Axboe Cc: Christoph Hellwig , Mike Snitzer , linux-block@vger.kernel.org, dm-devel@lists.linux.dev, Hannes Reinecke Subject: [PATCH] block: check for max_hw_sectors underflow Date: Fri, 24 May 2024 11:57:19 +0200 Message-Id: <20240524095719.105284-1-hare@kernel.org> X-Mailer: git-send-email 2.35.3 Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The logical block size need to be smaller than the max_hw_sector setting, otherwise we can't even transfer a single LBA. Signed-off-by: Hannes Reinecke --- block/blk-settings.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/block/blk-settings.c b/block/blk-settings.c index 524cf597b2e9..0cdca702e988 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -133,6 +133,8 @@ static int blk_validate_limits(struct queue_limits *lim) lim->max_hw_sectors = BLK_SAFE_MAX_SECTORS; if (WARN_ON_ONCE(lim->max_hw_sectors < PAGE_SECTORS)) return -EINVAL; + if (WARN_ON_ONCE((lim->logical_block_size >> SECTOR_SHIFT) > lim->max_hw_sectors)) + return -EINVAL; lim->max_hw_sectors = round_down(lim->max_hw_sectors, lim->logical_block_size >> SECTOR_SHIFT);