INFO: task kworker/0:3:9048 blocked for more than 140 seconds.
Not tainted 4.14.261-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:3 D27216 9048 2 0x80000000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
hub_port_connect drivers/usb/core/hub.c:4921 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5144 [inline]
port_event drivers/usb/core/hub.c:5250 [inline]
hub_event+0x15ea/0x3f60 drivers/usb/core/hub.c:5330
process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
INFO: task kworker/0:6:11985 blocked for more than 140 seconds.
Not tainted 4.14.261-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:6 D28280 11985 2 0x80000000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
hub_port_connect drivers/usb/core/hub.c:4921 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5144 [inline]
port_event drivers/usb/core/hub.c:5250 [inline]
hub_event+0x15ea/0x3f60 drivers/usb/core/hub.c:5330
process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Showing all locks held in the system:
5 locks held by kworker/1:0/18:
#0: ("usb_hub_wq"){+.+.}, at: [<ffffffff81364b80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&hub->events)){+.+.}, at: [<ffffffff81364bb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (&dev->mutex){....}, at: [<ffffffff8445b738>] device_lock include/linux/device.h:1082 [inline]
#2: (&dev->mutex){....}, at: [<ffffffff8445b738>] hub_event+0x108/0x3f60 drivers/usb/core/hub.c:5276
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] usb_lock_port drivers/usb/core/hub.c:2936 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_port_connect drivers/usb/core/hub.c:4920 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_port_connect_change drivers/usb/core/hub.c:5144 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] port_event drivers/usb/core/hub.c:5250 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_event+0x15c0/0x3f60 drivers/usb/core/hub.c:5330
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_port_connect drivers/usb/core/hub.c:4921 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_port_connect_change drivers/usb/core/hub.c:5144 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] port_event drivers/usb/core/hub.c:5250 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_event+0x15ea/0x3f60 drivers/usb/core/hub.c:5330
1 lock held by khungtaskd/1532:
#0: (tasklist_lock){.+.+}, at: [<ffffffff8701ef67>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
5 locks held by kworker/0:3/9048:
#0: ("usb_hub_wq"){+.+.}, at: [<ffffffff81364b80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&hub->events)){+.+.}, at: [<ffffffff81364bb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (&dev->mutex){....}, at: [<ffffffff8445b738>] device_lock include/linux/device.h:1082 [inline]
#2: (&dev->mutex){....}, at: [<ffffffff8445b738>] hub_event+0x108/0x3f60 drivers/usb/core/hub.c:5276
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] usb_lock_port drivers/usb/core/hub.c:2936 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_port_connect drivers/usb/core/hub.c:4920 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_port_connect_change drivers/usb/core/hub.c:5144 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] port_event drivers/usb/core/hub.c:5250 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_event+0x15c0/0x3f60 drivers/usb/core/hub.c:5330
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_port_connect drivers/usb/core/hub.c:4921 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_port_connect_change drivers/usb/core/hub.c:5144 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] port_event drivers/usb/core/hub.c:5250 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_event+0x15ea/0x3f60 drivers/usb/core/hub.c:5330
5 locks held by kworker/0:5/11307:
#0: ("usb_hub_wq"){+.+.}, at: [<ffffffff81364b80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&hub->events)){+.+.}, at: [<ffffffff81364bb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (&dev->mutex){....}, at: [<ffffffff8445b738>] device_lock include/linux/device.h:1082 [inline]
#2: (&dev->mutex){....}, at: [<ffffffff8445b738>] hub_event+0x108/0x3f60 drivers/usb/core/hub.c:5276
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] usb_lock_port drivers/usb/core/hub.c:2936 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_port_connect drivers/usb/core/hub.c:4920 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_port_connect_change drivers/usb/core/hub.c:5144 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] port_event drivers/usb/core/hub.c:5250 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_event+0x15c0/0x3f60 drivers/usb/core/hub.c:5330
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_port_connect drivers/usb/core/hub.c:4921 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_port_connect_change drivers/usb/core/hub.c:5144 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] port_event drivers/usb/core/hub.c:5250 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_event+0x15ea/0x3f60 drivers/usb/core/hub.c:5330
5 locks held by kworker/0:6/11985:
#0: ("usb_hub_wq"){+.+.}, at: [<ffffffff81364b80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&hub->events)){+.+.}, at: [<ffffffff81364bb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (&dev->mutex){....}, at: [<ffffffff8445b738>] device_lock include/linux/device.h:1082 [inline]
#2: (&dev->mutex){....}, at: [<ffffffff8445b738>] hub_event+0x108/0x3f60 drivers/usb/core/hub.c:5276
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] usb_lock_port drivers/usb/core/hub.c:2936 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_port_connect drivers/usb/core/hub.c:4920 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_port_connect_change drivers/usb/core/hub.c:5144 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] port_event drivers/usb/core/hub.c:5250 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_event+0x15c0/0x3f60 drivers/usb/core/hub.c:5330
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_port_connect drivers/usb/core/hub.c:4921 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_port_connect_change drivers/usb/core/hub.c:5144 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] port_event drivers/usb/core/hub.c:5250 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_event+0x15ea/0x3f60 drivers/usb/core/hub.c:5330
5 locks held by kworker/1:3/10574:
#0: ("usb_hub_wq"){+.+.}, at: [<ffffffff81364b80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&hub->events)){+.+.}, at: [<ffffffff81364bb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (&dev->mutex){....}, at: [<ffffffff8445b738>] device_lock include/linux/device.h:1082 [inline]
#2: (&dev->mutex){....}, at: [<ffffffff8445b738>] hub_event+0x108/0x3f60 drivers/usb/core/hub.c:5276
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] usb_lock_port drivers/usb/core/hub.c:2936 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_port_connect drivers/usb/core/hub.c:4920 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_port_connect_change drivers/usb/core/hub.c:5144 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] port_event drivers/usb/core/hub.c:5250 [inline]
#3: (&port_dev->status_lock){+.+.}, at: [<ffffffff8445cbf0>] hub_event+0x15c0/0x3f60 drivers/usb/core/hub.c:5330
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_port_connect drivers/usb/core/hub.c:4921 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_port_connect_change drivers/usb/core/hub.c:5144 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] port_event drivers/usb/core/hub.c:5250 [inline]
#4: (hcd->address0_mutex){+.+.}, at: [<ffffffff8445cc1a>] hub_event+0x15ea/0x3f60 drivers/usb/core/hub.c:5330
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1532 Comm: khungtaskd Not tainted 4.14.261-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x5b9/0xb40 kernel/hung_task.c:274
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2858 Comm: kworker/u4:4 Not tainted 4.14.261-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
task: ffff8880ac01a0c0 task.stack: ffff8880ac078000
RIP: 0010:debug_lockdep_rcu_enabled kernel/rcu/update.c:300 [inline]
RIP: 0010:debug_lockdep_rcu_enabled+0x9f/0xe0 kernel/rcu/update.c:297
RSP: 0018:ffff8880ac07fc38 EFLAGS: 00000002
RAX: 0000000000000007 RBX: ffff8880ac01a0c0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff8880ac01a944
RBP: ffffffff88f77980 R08: 0000000000000000 R09: 0000000000020012
R10: 0000000000000000 R11: ffff8880ac01a0c0 R12: ffffffff86eb30d0
R13: ffff8880ac01a0c0 R14: ffff88813fe468c0 R15: ffff8880a4a43c00
FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2637830741 CR3: 0000000019fd4000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x5a6/0x870 kernel/locking/lockdep.c:4016
rcu_lock_release include/linux/rcupdate.h:247 [inline]
rcu_read_unlock include/linux/rcupdate.h:685 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:422 [inline]
batadv_nc_worker+0x5a7/0xc50 net/batman-adv/network-coding.c:728
process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 02 00 48 8d bb 84 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 <84> d2 75 32 8b 93 84 08 00 00 31 c0 5b 85 d2 0f 94 c0 c3 31 c0
----------------
Code disassembly (best guess):
0: 02 00 add (%rax),%al
2: 48 8d bb 84 08 00 00 lea 0x884(%rbx),%rdi
9: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
10: fc ff df
13: 48 89 fa mov %rdi,%rdx
16: 48 c1 ea 03 shr $0x3,%rdx
1a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx
1e: 48 89 f8 mov %rdi,%rax
21: 83 e0 07 and $0x7,%eax
24: 83 c0 03 add $0x3,%eax
27: 38 d0 cmp %dl,%al
29: 7c 04 jl 0x2f
* 2b: 84 d2 test %dl,%dl <-- trapping instruction
2d: 75 32 jne 0x61
2f: 8b 93 84 08 00 00 mov 0x884(%rbx),%edx
35: 31 c0 xor %eax,%eax
37: 5b pop %rbx
38: 85 d2 test %edx,%edx
3a: 0f 94 c0 sete %al
3d: c3 retq
3e: 31 c0 xor %eax,%eax