From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 104C5C432C0 for ; Thu, 21 Nov 2019 14:45:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D9C88206B6 for ; Thu, 21 Nov 2019 14:45:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727146AbfKUOpN (ORCPT ); Thu, 21 Nov 2019 09:45:13 -0500 Received: from mail-il1-f199.google.com ([209.85.166.199]:54970 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726922AbfKUOpM (ORCPT ); Thu, 21 Nov 2019 09:45:12 -0500 Received: by mail-il1-f199.google.com with SMTP id t67so3074838ill.21 for ; Thu, 21 Nov 2019 06:45:10 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=gKVEHAypeETPe8BrGsTwrpNX1ECF4WGPfjBww5LbXIE=; b=rebcDtJOHkYHJBTXBLzf9OhAZoLUJkgtQwRzsFoluaSnajRmS3r3u89jVbjqcI+iK4 y4YxjJoVPigXVDjMeh6UGTg2STqmjw0uEp/nmo3FEIoEYRyPHr4nG038OWv3gwFC8dRT EIJgsSVOd5ekvE0E0Vg5GFnwm9LqbHkAlUnl7813ne2iLeSqS8RNj/rlXMhjVL16h7qK XjfTNiP8t/gBhqVCc3nYhd4xM+V2leeT78dGRfKyQlx8Q54d0a/OVFWP7b9hlBS2OG1L xvhkS3rr3hLvm4aYhkHEtReMbU39K7KqzJWsGUcLomhxQRybv5rhsC/xNIsd3zKmfTfl 8syA== X-Gm-Message-State: APjAAAVvo7LRj+VCZJyqZbA7obbOqiaz2WqQ1LbnwKU+cfOSkPIWlqGR NfNUbEs+XTMULc4D/CY+k1yAqZKoJqU6Q9f+uYVwCheIodib X-Google-Smtp-Source: APXvYqxZ3Qw0R6eFPKZCR7qRh2nPXw7qOlHgzU6f4Hf5Qk1q8lnrgvdMAX6Pp1H4q86+9fHJuXYS3a+iyTb3/yjV/hgXlTBd9LeB MIME-Version: 1.0 X-Received: by 2002:a6b:8e47:: with SMTP id q68mr4633416iod.274.1574347509632; Thu, 21 Nov 2019 06:45:09 -0800 (PST) Date: Thu, 21 Nov 2019 06:45:09 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000109c040597dc5843@google.com> Subject: INFO: rcu detected stall in hub_event From: syzbot To: andreyknvl@google.com, benjamin.tissoires@redhat.com, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 46178223 usb: gadget: add raw-gadget interface git tree: https://github.com/google/kasan.git usb-fuzzer console output: https://syzkaller.appspot.com/x/log.txt?x=15a05836e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=99c88c44660624e7 dashboard link: https://syzkaller.appspot.com/bug?extid=ec5f884c4a135aa0dbb9 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1061395ae00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13653d1ce00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+ec5f884c4a135aa0dbb9@syzkaller.appspotmail.com rcu: INFO: rcu_sched self-detected stall on CPU rcu: 0-....: (10499 ticks this GP) idle=8ea/1/0x4000000000000002 softirq=1810/1810 fqs=5108 (t=10500 jiffies g=1553 q=595) NMI backtrace for cpu 0 CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.4.0-rc6+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x55/0x96 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1c7 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x169/0x1b3 kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2795 [inline] rcu_sched_clock_irq.cold+0x4da/0x936 kernel/rcu/tree.c:2244 update_process_times+0x25/0x60 kernel/time/timer.c:1726 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:167 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1299 __run_hrtimer kernel/time/hrtimer.c:1514 [inline] __hrtimer_run_queues+0x303/0xc60 kernel/time/hrtimer.c:1576 hrtimer_interrupt+0x2e8/0x730 kernel/time/hrtimer.c:1638 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0xf5/0x500 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:hid_apply_multiplier drivers/hid/hid-core.c:1058 [inline] RIP: 0010:hid_setup_resolution_multiplier+0x33b/0x990 drivers/hid/hid-core.c:1114 Code: e8 2a 96 ed fc 48 8d 7d 04 48 89 f8 48 c1 e8 03 42 0f b6 14 38 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 0c 05 00 00 <44> 8b 6d 04 bf 02 00 00 00 44 89 ee e8 64 97 ed fc 41 83 fd 02 74 RSP: 0018:ffff8881da226cd8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffff8450902c RDX: 0000000000000000 RSI: ffffffff84509036 RDI: ffff8881d4df1204 RBP: ffff8881d4df1200 R08: ffff8881da211800 R09: ffffc900004770cc R10: fffff5200009241b R11: ffffc900004920db R12: ffff8881c6640000 R13: 0000000000000000 R14: ffff8881d4df1200 R15: dffffc0000000000 hid_open_report+0x438/0x640 drivers/hid/hid-core.c:1225 hid_parse include/linux/hid.h:1017 [inline] ms_probe+0x12d/0x4d0 drivers/hid/hid-microsoft.c:388 hid_device_probe+0x2be/0x3f0 drivers/hid/hid-core.c:2212 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x104/0x210 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0xae6/0x16f0 drivers/base/core.c:2202 hid_add_device drivers/hid/hid-core.c:2368 [inline] hid_add_device+0x33c/0x9a0 drivers/hid/hid-core.c:2317 usbhid_probe+0xa81/0xfa0 drivers/hid/usbhid/hid-core.c:1386 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x104/0x210 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0xae6/0x16f0 drivers/base/core.c:2202 usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x104/0x210 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0xae6/0x16f0 drivers/base/core.c:2202 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2537 hub_port_connect drivers/usb/core/hub.c:5184 [inline] hub_port_connect_change drivers/usb/core/hub.c:5324 [inline] port_event drivers/usb/core/hub.c:5470 [inline] hub_event+0x1df8/0x3800 drivers/usb/core/hub.c:5552 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches