INFO: rcu detected stall in hub

INFO: rcu detected stall in hub_event
Status: upstream: reported C repro on 2019/11/21 14:45
Reported-by: syzbot+ec5f884c4a135aa0dbb9@syzkaller.appspotmail.com
First crash: 259d, last: 160d

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2019/11/25 21:24	17m	stern@rowland.harvard.edu	patch	https://github.com/google/kasan.git 46178223	OK
2019/11/24 16:17	10m	stern@rowland.harvard.edu	patch	https://github.com/google/kasan.git 46178223	report log
2019/11/22 16:51	11m	stern@rowland.harvard.edu	patch	https://github.com/google/kasan.git 46178223	report log

Sample crash report:

rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=d02/1/0x4000000000000002 softirq=2696/2696 fqs=5195 
	(t=10500 jiffies g=1449 q=28)
NMI backtrace for cpu 0
CPU: 0 PID: 95 Comm: kworker/0:2 Not tainted 5.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xef/0x16e lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1db/0x207 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:475 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:549 [inline]
 rcu_pending kernel/rcu/tree.c:3030 [inline]
 rcu_sched_clock_irq.cold+0x4da/0x901 kernel/rcu/tree.c:2276
 update_process_times+0x25/0x60 kernel/time/timer.c:1726
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:171
 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1314
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x32c/0xd20 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x2e8/0x730 kernel/time/hrtimer.c:1641
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1119 [inline]
 smp_apic_timer_interrupt+0xfe/0x540 arch/x86/kernel/apic/apic.c:1144
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:write_comp_data+0x1e/0x70 kernel/kcov.c:208
Code: 48 89 11 c3 0f 1f 84 00 00 00 00 00 65 4c 8b 04 25 00 0f 02 00 65 8b 05 78 b1 c2 7e a9 00 01 1f 00 75 51 41 8b 80 b0 12 00 00 <83> f8 03 75 45 49 8b 80 b8 12 00 00 45 8b 80 b4 12 00 00 4c 8b 08
RSP: 0018:ffff8881d5be6c88 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff846d24ac
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000005
RBP: ffff8881d97e6400 R08: ffff8881d8994980 R09: ffffc9000046f0cc
R10: fffff5200009141b R11: ffffc9000048a0db R12: ffff8881c5680000
R13: 0000000000000000 R14: ffff8881d97e6400 R15: dffffc0000000000
 hid_apply_multiplier drivers/hid/hid-core.c:1106 [inline]
 hid_setup_resolution_multiplier+0x34c/0x990 drivers/hid/hid-core.c:1163
 hid_open_report+0x438/0x640 drivers/hid/hid-core.c:1274
 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:2261
 really_probe+0x290/0xac0 drivers/base/dd.c:551
 driver_probe_device+0x223/0x350 drivers/base/dd.c:724
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x217/0x390 drivers/base/dd.c:897
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1459/0x1bf0 drivers/base/core.c:2487
 hid_add_device drivers/hid/hid-core.c:2417 [inline]
 hid_add_device+0x33c/0x9a0 drivers/hid/hid-core.c:2366
 usbhid_probe+0xa81/0xfa0 drivers/hid/usbhid/hid-core.c:1386
 usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:374
 really_probe+0x290/0xac0 drivers/base/dd.c:551
 driver_probe_device+0x223/0x350 drivers/base/dd.c:724
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x217/0x390 drivers/base/dd.c:897
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1459/0x1bf0 drivers/base/core.c:2487
 usb_set_configuration+0xe47/0x17d0 drivers/usb/core/message.c:2023
 usb_generic_driver_probe+0x9d/0xe0 drivers/usb/core/generic.c:241
 usb_probe_device+0xd9/0x230 drivers/usb/core/driver.c:272
 really_probe+0x290/0xac0 drivers/base/dd.c:551
 driver_probe_device+0x223/0x350 drivers/base/dd.c:724
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x217/0x390 drivers/base/dd.c:897
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1459/0x1bf0 drivers/base/core.c:2487
 usb_new_device.cold+0x540/0xcd0 drivers/usb/core/hub.c:2544
 hub_port_connect drivers/usb/core/hub.c:5191 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5331 [inline]
 port_event drivers/usb/core/hub.c:5477 [inline]
 hub_event+0x21cb/0x4300 drivers/usb/core/hub.c:5559
 process_one_work+0x94b/0x1620 kernel/workqueue.c:2264
 worker_thread+0x96/0xe20 kernel/workqueue.c:2410
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Crashes (7):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci2-upstream-usb	2020/02/27 00:56	https://github.com/google/kasan.git usb-fuzzer	d6ff8147	251aabb7	.config	log	report	syz	C	benjamin.tissoires@redhat.com, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-usb	2020/01/27 03:23	https://github.com/google/kasan.git usb-fuzzer	cd234325	dd56146d	.config	log	report	syz	C	benjamin.tissoires@redhat.com, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-usb	2019/12/21 14:05	https://github.com/google/kasan.git usb-fuzzer	ecdf2214	bc586918	.config	log	report	syz	C	benjamin.tissoires@redhat.com, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-usb	2019/12/18 10:28	https://github.com/google/kasan.git usb-fuzzer	d533c992	64ca0a37	.config	log	report	syz	C	benjamin.tissoires@redhat.com, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-usb	2019/11/20 14:24	https://github.com/google/kasan.git usb-fuzzer	46178223	432c7650	.config	log	report	syz	C	benjamin.tissoires@redhat.com, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-usb	2019/12/27 19:58	https://github.com/google/kasan.git usb-fuzzer	ecdf2214	be5c2c81	.config	log	report	syz		benjamin.tissoires@redhat.com, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-usb	2020/02/24 18:54	https://github.com/google/kasan.git usb-fuzzer	d6ff8147	1253d6f0	.config	log	report			benjamin.tissoires@redhat.com, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org