From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793214264; b=vgtbpptqsrfUrTD1jQPhV2pBUwFuULwYEjuHOPkSdmS5ZinZXuzFMso1og8qgxiYfBhW p381Pzc0hh964USqtHZGb+HO4zITorXWv9KHXlOFHxMVaYhjmKVw6wsA2cNS7ZRNZBojO D4YyBmv2JTQEkAQNtWS2F0niOUZZ+DzdPc66Rvdpi9xMwDYsyy2WtkCuhLsNFWv9RQFCd lsfY+uYJ6U1bnVGYOs3MW6HIu8fvpvob4EoSNEz/IS85ZB1Y1rY5fG8gCoov4ktkAHHYf 6kd8fY4QQXVITCqgxlXxUTvmNETzpVYj0FCsBCvcrxexyzU+TMcv17yloR2gZ9N0itg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793214264; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=r1jBvln5+faqnBd6fcaADcVLVh0q4/FsxcvbZmXGNPc=; b=NJ8zwg/7wGkdb8odsA5MfJFh+BIoZvaxDvK7NFE/m8+Qzb34wPgdUgQnsNNM/hWzuuxR MOqEvzfhJdqCbZiPnrHq5f6XjiQnQ6pmnGfp45oe11dxh8MAHKIHYoNUYInfwL9FRgfzD aMsL9aomV1t3qCArRggnwee6ISmY+lEywI7Q9ZEgbGjkaTbPBsx3nfpFOTMcdmlxXBqzS rwZJW+vnKhKx+2V+b1I8v3Mob1GGxqPXJpfgPCqmbM64ynd35PnbX50rvcX5Y42orb/ni PZwZwTBB7TjfTd9PgtxweIneev0/8niMckg7NOBC+0ApJe6BWU8jul30gpDoV06rG7g== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=Auzc9j0k; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CCF2D60A2634; Wed, 28 Oct 2026 19:04:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=Auzc9j0k Received: by smtp.kernel.org (Postfix) with ESMTPSA id 272FE1F01825; Wed, 28 Oct 2026 19:04:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793214263; bh=r1jBvln5+faqnBd6fcaADcVLVh0q4/FsxcvbZmXGNPc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Auzc9j0kRq/Je2NCYY/r6u0gNrWAU7F8KI5iHsb4fYnBZjR3fOWodkCDzbVui3ExI 3/ma3MlihGKsbXtiOc+fMxY1D2FYIo53nJhuKwiZnll5pSnwMgzft5NH9zMes44Q+g J4y7UP8g7vw52l3vhHQJIYDOdiAHM2uDxxXw6YXY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ronnie Sahlberg , Ming Lei , Jens Axboe , Sasha Levin Subject: [PATCH 6.1 0796/1887] ublk: santizize the arguments from userspace when adding a device Date: Wed, 28 Oct 2026 17:48:12 +0100 Message-ID: <20261028170517.545866021@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028170459.200466217@linuxfoundation.org> References: <20261028170459.200466217@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ronnie Sahlberg [ Upstream commit 8c8472855884355caf3d8e0c50adf825f83454b2 ] Sanity check the values for queue depth and number of queues we get from userspace when adding a device. Signed-off-by: Ronnie Sahlberg Reviewed-by: Ming Lei Fixes: 71f28f3136af ("ublk_drv: add io_uring based userspace block driver") Fixes: 62fe99cef94a ("ublk: add read()/write() support for ublk char device") Link: https://lore.kernel.org/r/20250619021031.181340-1-ronniesahlberg@gmail.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- drivers/block/ublk_drv.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index c41bb08efb12c..538827b68d881 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -1697,6 +1697,10 @@ static int ublk_ctrl_add_dev(struct io_uring_cmd *cmd) if (copy_from_user(&info, argp, sizeof(info))) return -EFAULT; ublk_dump_dev_info(&info); + + if (info.queue_depth > UBLK_MAX_QUEUE_DEPTH) + return -EINVAL; + if (header->dev_id != info.dev_id) { pr_warn("%s: dev id not match %u %u\n", __func__, header->dev_id, info.dev_id); -- 2.53.0