From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751359AbdILFX3 (ORCPT ); Tue, 12 Sep 2017 01:23:29 -0400 Received: from mail-it0-f41.google.com ([209.85.214.41]:46093 "EHLO mail-it0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751279AbdILFX1 (ORCPT ); Tue, 12 Sep 2017 01:23:27 -0400 X-Google-Smtp-Source: AOwi7QAcxOaYcmlb2KATW1Ab2sqg4A7Hio2jDjCEjLV2JtHuh+TlA0j+dMXP0u5O+5arpjxplkafbc7e0234DPXoURI= MIME-Version: 1.0 In-Reply-To: <46e1a068-ae72-51f6-c2ef-977f4bc7493b@gmail.com> References: <46e1a068-ae72-51f6-c2ef-977f4bc7493b@gmail.com> From: Dmitry Vyukov Date: Tue, 12 Sep 2017 07:23:06 +0200 Message-ID: Subject: Re: usb/joystick: warnings in xpad_start_input and xpad_try_sending_next_out_packet To: Cameron Gutman Cc: Andrey Konovalov , Dmitry Torokhov , Benjamin Valentin , Pavel Rojtberg , Daniel Tobias , linux-input@vger.kernel.org, LKML , Kostya Serebryany , syzkaller Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 12, 2017 at 5:42 AM, Cameron Gutman wrote: > On 09/11/2017 05:26 AM, Andrey Konovalov wrote: >> Hi! >> >> I've got the following crashes while fuzzing the kernel with syzkaller. >> >> On commit 81a84ad3cb5711cec79f4dd53a4ce026b092c432 (Sep 3). >> >> usb 1-1: BOGUS urb xfer, pipe 1 != type 3 >> WARNING: CPU: 1 PID: 2574 at drivers/usb/core/urb.c:449 >> usb_submit_urb+0xf8a/0x11d0 >> Modules linked in: >> CPU: 1 PID: 2574 Comm: kworker/1:2 Not tainted 4.13.0+ #88 >> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 >> Workqueue: usb_hub_wq hub_event >> task: ffff880067ec9a00 task.stack: ffff880067988000 >> RIP: 0010:usb_submit_urb+0xf8a/0x11d0 drivers/usb/core/urb.c:448 >> RSP: 0018:ffff88006798e0b0 EFLAGS: 00010082 >> RAX: 0000000000000029 RBX: ffff88006b9ca200 RCX: 0000000000000000 >> RDX: 0000000000000029 RSI: ffff88006c915c78 RDI: ffffed000cf31c08 >> RBP: ffff88006798e1b0 R08: fffffbfff0fe00ff R09: fffffbfff0fe00ff >> R10: 0000000000000001 R11: fffffbfff0fe00fe R12: 1ffff1000cf31c1d >> R13: 0000000000000003 R14: 0000000000000001 R15: ffff88006b164798 >> FS: 0000000000000000(0000) GS:ffff88006c900000(0000) knlGS:0000000000000000 >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> CR2: 00007fde04686518 CR3: 000000006a539000 CR4: 00000000000006e0 >> Call Trace: >> xpad_try_sending_next_out_packet+0xe1/0x1d0 drivers/input/joystick/xpad.c:1000 >> xpad_send_led_command drivers/input/joystick/xpad.c:1372 >> xpad_led_set+0x465/0x6e0 drivers/input/joystick/xpad.c:1392 >> __led_set_brightness drivers/leds/led-core.c:34 >> led_set_brightness_nopm+0x53/0x100 drivers/leds/led-core.c:261 >> led_set_brightness_nosleep+0x17f/0x220 drivers/leds/led-core.c:278 >> led_set_brightness+0xfe/0x130 drivers/leds/led-core.c:253 >> xpad_identify_controller drivers/input/joystick/xpad.c:1383 >> xpad_led_probe drivers/input/joystick/xpad.c:1426 >> xpad_init_input+0xd40/0xfe0 drivers/input/joystick/xpad.c:1667 >> xpad_probe+0x13d4/0x1e00 drivers/input/joystick/xpad.c:1811 >> usb_probe_interface+0x351/0x8d0 drivers/usb/core/driver.c:361 >> really_probe drivers/base/dd.c:385 >> driver_probe_device+0x610/0xa00 drivers/base/dd.c:529 >> __device_attach_driver+0x230/0x290 drivers/base/dd.c:625 >> bus_for_each_drv+0x15e/0x210 drivers/base/bus.c:463 >> __device_attach+0x269/0x3c0 drivers/base/dd.c:682 >> device_initial_probe+0x1f/0x30 drivers/base/dd.c:729 >> bus_probe_device+0x1da/0x280 drivers/base/bus.c:523 >> device_add+0xcf9/0x1640 drivers/base/core.c:1703 >> usb_set_configuration+0x1064/0x1890 drivers/usb/core/message.c:1932 >> generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174 >> usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266 >> really_probe drivers/base/dd.c:385 >> driver_probe_device+0x610/0xa00 drivers/base/dd.c:529 >> __device_attach_driver+0x230/0x290 drivers/base/dd.c:625 >> bus_for_each_drv+0x15e/0x210 drivers/base/bus.c:463 >> __device_attach+0x269/0x3c0 drivers/base/dd.c:682 >> device_initial_probe+0x1f/0x30 drivers/base/dd.c:729 >> bus_probe_device+0x1da/0x280 drivers/base/bus.c:523 >> device_add+0xcf9/0x1640 drivers/base/core.c:1703 >> usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2457 >> hub_port_connect drivers/usb/core/hub.c:4890 >> hub_port_connect_change drivers/usb/core/hub.c:4996 >> port_event drivers/usb/core/hub.c:5102 >> hub_event+0x23c8/0x37c0 drivers/usb/core/hub.c:5182 >> process_one_work+0x9fb/0x1570 kernel/workqueue.c:2097 >> worker_thread+0x1e4/0x1350 kernel/workqueue.c:2231 >> kthread+0x324/0x3f0 kernel/kthread.c:231 >> ret_from_fork+0x25/0x30 arch/x86/entry/entry_64.S:425 >> Code: 48 8b 85 30 ff ff ff 48 8d b8 98 00 00 00 e8 8e 93 07 ff 45 89 >> e8 44 89 f1 4c 89 fa 48 89 c6 48 c7 c7 a0 e5 55 86 e8 20 08 8f fd <0f> >> ff e9 9b f7 ff ff e8 4a 04 d6 fd e9 80 f7 ff ff e8 60 11 a6 >> ---[ end trace 5b20fc700a17a457 ]--- > > I assume you're doing some sort of USB emulation to fuzz these? Yes. > I don't > think we'd get that far with any real device that wasn't explicitly designed > to trick us. Note there _are_ such devices, e.g. https://int3.cc/products/facedancer21 > In any case, this patch should take care of it. > > Regards, > Cameron > > ---- > diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c > index f8e34ef643c7..d86e59515b9c 100644 > --- a/drivers/input/joystick/xpad.c > +++ b/drivers/input/joystick/xpad.c > @@ -1764,10 +1764,12 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id > struct usb_endpoint_descriptor *ep = > &intf->cur_altsetting->endpoint[i].desc; > > - if (usb_endpoint_dir_in(ep)) > - ep_irq_in = ep; > - else > - ep_irq_out = ep; > + if (usb_endpoint_xfer_int(ep)) { > + if (usb_endpoint_dir_in(ep)) > + ep_irq_in = ep; > + else > + ep_irq_out = ep; > + } > } > > if (!ep_irq_in || !ep_irq_out) { > > > >