From patchwork Sat Sep 23 19:41:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= X-Patchwork-Id: 726001 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 3EBBF21357 for ; Sat, 23 Sep 2023 19:49:30 +0000 (UTC) Received: from rere.qmqm.pl (rere.qmqm.pl [91.227.64.183]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D41B197; Sat, 23 Sep 2023 12:49:27 -0700 (PDT) Received: from remote.user (localhost [127.0.0.1]) by rere.qmqm.pl (Postfix) with ESMTPSA id 4RtKK00TJlz60; Sat, 23 Sep 2023 21:41:56 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rere.qmqm.pl; s=1; t=1695498116; bh=WaDURwgyluIiB2ax3Az3mbDHSET8J7MRawjhvJmqpZA=; h=Date:In-Reply-To:References:Subject:From:To:Cc:From; b=ic8BdKHd+GgVXvHbYqYYUs7XzSZBKxinHfSk6MtTdjWQoJmw4eXeXYbndLRpmZX/S squnyW39iLb1PsF2C7Ql2tuC5ZJ60A74FIzoAkAq3jup/HKr7DaB9K7VWbwMG0ZtIJ WJmYzk4LxUbJ1qU6wys9LbaBuiR30x8eLTcG3NCpMf90IAesfp00mdck0QRCl9dc1L zGTHWI6lbPILTAeiaa5Eqpo8RkbGsawa5LDD/fNlfkXCsBOC2JZHZltgaRJLgs/Nbl djv5uxjcreuMmq4zv/ZMkPnxOSvNxQ1K0H/1F5+hmjrs5AOgELiOel1aW+0AupcD1y A5weuzbJiwmjQ== X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.8 at mail Date: Sat, 23 Sep 2023 21:41:55 +0200 Message-Id: In-Reply-To: References: Subject: [PATCH 1/3] usb: chipidea: Fix DMA overwrite for Tegra Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= To: Peter Chen , Greg Kroah-Hartman , Thierry Reding , Dmitry Osipenko , Peter Geis , Jonathan Hunter Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-tegra@vger.kernel.org X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,SPF_HELO_PASS,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Tegra USB controllers seem to issue DMA in doubleword-sized chunks and thus may write past the buffer provided. This is detected by SLUB: ============================================================================= BUG kmalloc-64 (Tainted: G B ): kmalloc Redzone overwritten ----------------------------------------------------------------------------- 0x8555cd02-0x8555cd03 @offset=3330. First byte 0x0 instead of 0xcc Allocated in usb_get_status+0x2b/0xac age=1 cpu=3 pid=41 __kmem_cache_alloc_node+0x12f/0x1e4 __kmalloc+0x33/0x8c usb_get_status+0x2b/0xac hub_probe+0x5e9/0xcec usb_probe_interface+0xbf/0x21c really_probe+0xa5/0x2c4 __driver_probe_device+0x75/0x174 driver_probe_device+0x31/0x94 __device_attach_driver+0x65/0xc0 bus_for_each_drv+0x4b/0x74 __device_attach+0x69/0x120 bus_probe_device+0x65/0x6c device_add+0x48b/0x5f8 usb_set_configuration+0x37b/0x6b4 usb_generic_driver_probe+0x37/0x68 usb_probe_device+0x35/0xb4 Slab 0xbf622b80 objects=21 used=18 fp=0x8555cdc0 flags=0x800(slab|zone=0) Object 0x8555cd00 @offset=3328 fp=0x00000000 Redzone 8555ccc0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc ................ Redzone 8555ccd0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc ................ Redzone 8555cce0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc ................ Redzone 8555ccf0: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc ................ Object 8555cd00: 01 00 00 00 cc cc cc cc cc cc cc cc cc cc cc cc ................ Object 8555cd10: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc ................ Object 8555cd20: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc ................ Object 8555cd30: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc ................ Redzone 8555cd40: cc cc cc cc .... Padding 8555cd74: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZ CPU: 3 PID: 41 Comm: kworker/3:1 Tainted: G B 6.6.0-rc1mq-00118-g59786f827ea1 #1115 Hardware name: NVIDIA Tegra SoC (Flattened Device Tree) Workqueue: usb_hub_wq hub_event [<8010ca28>] (unwind_backtrace) from [<801090a5>] (show_stack+0x11/0x14) [<801090a5>] (show_stack) from [<805da2fb>] (dump_stack_lvl+0x4d/0x7c) [<805da2fb>] (dump_stack_lvl) from [<8026464f>] (check_bytes_and_report+0xb3/0xe4) [<8026464f>] (check_bytes_and_report) from [<802648e1>] (check_object+0x261/0x290) [<802648e1>] (check_object) from [<802671b1>] (free_to_partial_list+0x105/0x3f8) [<802671b1>] (free_to_partial_list) from [<80268613>] (__kmem_cache_free+0x103/0x128) [<80268613>] (__kmem_cache_free) from [<80425a67>] (usb_get_status+0x73/0xac) [<80425a67>] (usb_get_status) from [<80421b31>] (hub_probe+0x5e9/0xcec) [<80421b31>] (hub_probe) from [<80428bbb>] (usb_probe_interface+0xbf/0x21c) [<80428bbb>] (usb_probe_interface) from [<803ee13d>] (really_probe+0xa5/0x2c4) [<803ee13d>] (really_probe) from [<803ee3d1>] (__driver_probe_device+0x75/0x174) [<803ee3d1>] (__driver_probe_device) from [<803ee501>] (driver_probe_device+0x31/0x94) usb 1-1: device descriptor read/8, error -71 Fixes: fc53d5279094 ("usb: chipidea: tegra: Support host mode") Signed-off-by: Michał Mirosław --- drivers/usb/chipidea/host.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c index 08af26b762a2..abddd39d1ff1 100644 --- a/drivers/usb/chipidea/host.c +++ b/drivers/usb/chipidea/host.c @@ -411,12 +411,13 @@ static int ci_hdrc_alloc_dma_aligned_buffer(struct urb *urb, gfp_t mem_flags) const unsigned int ci_hdrc_usb_dma_align = 32; size_t kmalloc_size; - if (urb->num_sgs || urb->sg || urb->transfer_buffer_length == 0 || - !((uintptr_t)urb->transfer_buffer & (ci_hdrc_usb_dma_align - 1))) + if (urb->num_sgs || urb->sg || urb->transfer_buffer_length == 0) + return 0; + if (!((uintptr_t)urb->transfer_buffer & (ci_hdrc_usb_dma_align - 1)) && !(urb->transfer_buffer_length & 3)) return 0; /* Allocate a buffer with enough padding for alignment */ - kmalloc_size = urb->transfer_buffer_length + + kmalloc_size = ALIGN(urb->transfer_buffer_length, 4) + sizeof(struct ci_hdrc_dma_aligned_buffer) + ci_hdrc_usb_dma_align - 1;