INFO: task kworker/1:6:3699 blocked for more than 143 seconds.
Not tainted 5.18.0-syzkaller-13918-g44688ffd111a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:6 state:D stack:21312 pid: 3699 ppid: 2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5116 [inline]
__schedule+0x957/0xec0 kernel/sched/core.c:6428
schedule+0xeb/0x1b0 kernel/sched/core.c:6500
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6559
__mutex_lock_common+0xecf/0x26c0 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
add_early_randomness drivers/char/hw_random/core.c:69 [inline]
hwrng_register+0x3bf/0x680 drivers/char/hw_random/core.c:599
chaoskey_probe+0x7f0/0xb10 drivers/usb/misc/chaoskey.c:205
usb_probe_interface+0x66e/0xb60 drivers/usb/core/driver.c:396
call_driver_probe+0x96/0x250
really_probe+0x220/0x940 drivers/base/dd.c:634
__driver_probe_device+0x1f4/0x3f0 drivers/base/dd.c:764
driver_probe_device+0x50/0x240 drivers/base/dd.c:794
__device_attach_driver+0x273/0x3d0 drivers/base/dd.c:917
bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427
__device_attach+0x372/0x5a0 drivers/base/dd.c:989
bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487
device_add+0xb20/0xf90 drivers/base/core.c:3417
usb_set_configuration+0x1a5f/0x20e0 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0x83/0x140 drivers/usb/core/generic.c:238
usb_probe_device+0x131/0x260 drivers/usb/core/driver.c:293
call_driver_probe+0x96/0x250
really_probe+0x220/0x940 drivers/base/dd.c:634
__driver_probe_device+0x1f4/0x3f0 drivers/base/dd.c:764
driver_probe_device+0x50/0x240 drivers/base/dd.c:794
__device_attach_driver+0x273/0x3d0 drivers/base/dd.c:917
bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427
__device_attach+0x372/0x5a0 drivers/base/dd.c:989
bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487
device_add+0xb20/0xf90 drivers/base/core.c:3417
usb_new_device+0xbfc/0x18a0 drivers/usb/core/hub.c:2566
hub_port_connect+0x106b/0x2930 drivers/usb/core/hub.c:5363
hub_port_connect_change+0x619/0xbe0 drivers/usb/core/hub.c:5507
port_event+0xeb7/0x1390 drivers/usb/core/hub.c:5663
hub_event+0x5be/0xd70 drivers/usb/core/hub.c:5745
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cb1ee20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by hwrng/755:
#0: ffffffff8d24cc08 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0xec/0x470 drivers/char/hw_random/core.c:503
2 locks held by getty/3297:
#0: ffff888027252098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002cd62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2124
6 locks held by kworker/1:6/3699:
#0: ffff888011e29938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262
#1: ffffc900041cfd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264
#2: ffff888021151190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff888021151190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bf/0xd70 drivers/usb/core/hub.c:5691
#3: ffff88802f8cc190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#3: ffff88802f8cc190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x5a0 drivers/base/dd.c:964
#4: ffff88802f8ce118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#4: ffff88802f8ce118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x5a0 drivers/base/dd.c:964
#5: ffffffff8d24cc08 (reading_mutex){+.+.}-{3:3}, at: add_early_randomness drivers/char/hw_random/core.c:69 [inline]
#5: ffffffff8d24cc08 (reading_mutex){+.+.}-{3:3}, at: hwrng_register+0x3bf/0x680 drivers/char/hw_random/core.c:599
3 locks held by udevd/3989:
#0: ffff8880270a5088 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:197 [inline]
#0: ffff8880270a5088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x19b/0x570 fs/kernfs/file.c:236
#1: ffff888020d51008 (kn->active#86){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:198 [inline]
#1: ffff888020d51008 (kn->active#86){++++}-{0:0}, at: kernfs_fop_read_iter+0x1b3/0x570 fs/kernfs/file.c:236
#2: ffff88802f8cc190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline]
#2: ffff88802f8cc190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x30/0x390 drivers/usb/core/sysfs.c:873
2 locks held by syz-executor.0/7829:
#0: ffffffff8d248de8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x57/0x3c0 drivers/char/misc.c:107
#1: ffffffff8c9d52c8 (system_transition_mutex){+.+.}-{3:3}, at: snapshot_open+0x23/0x260 kernel/power/user.c:54
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 5.18.0-syzkaller-13918-g44688ffd111a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x473/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x168/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xd18/0xd60 kernel/hung_task.c:378
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3693 Comm: kworker/1:4 Not tainted 5.18.0-syzkaller-13918-g44688ffd111a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:__preempt_count_add kernel/rcu/tree.c:1134 [inline]
RIP: 0010:rcu_is_watching+0x0/0xa0 kernel/rcu/tree.c:1137
Code: 01 ff ff ff e9 6c ff ff ff 48 c7 c7 c0 51 b2 8c 4c 89 e6 e8 e2 74 f0 02 e9 2a ff ff ff e8 78 e5 b9 08 0f 1f 84 00 00 00 00 00 <41> 57 41 56 53 65 ff 05 9c 8c 91 7e e8 cf f6 b9 08 89 c3 83 f8 08
RSP: 0018:ffffc9000416f9f8 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff9200082df40 RCX: ffff88801dd28000
RDX: 0000000000001000 RSI: ffff888030e94000 RDI: ffffffff85f867a7
RBP: ffffc9000416fa80 R08: 0000000000082a20 R09: 00000000ffffffff
R10: fffff5200082dee8 R11: 1ffff9200082dee6 R12: ffff888011c42140
R13: 0000000000082a20 R14: dffffc0000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555f86848 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x6b/0x130 kernel/rcu/update.c:123
trace_kmalloc_node+0x2d/0xe0 include/trace/events/kmem.h:100
__kmalloc_node_track_caller+0x259/0x3f0
kmalloc_reserve net/core/skbuff.c:354 [inline]
__alloc_skb+0x11d/0x660 net/core/skbuff.c:426
alloc_skb include/linux/skbuff.h:1426 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:742 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:799 [inline]
nsim_dev_trap_report_work+0x257/0xab0 drivers/net/netdevsim/dev.c:840
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess), 4 bytes skipped:
0: e9 6c ff ff ff jmpq 0xffffff71
5: 48 c7 c7 c0 51 b2 8c mov $0xffffffff8cb251c0,%rdi
c: 4c 89 e6 mov %r12,%rsi
f: e8 e2 74 f0 02 callq 0x2f074f6
14: e9 2a ff ff ff jmpq 0xffffff43
19: e8 78 e5 b9 08 callq 0x8b9e596
1e: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
25: 00
* 26: 41 57 push %r15 <-- trapping instruction
28: 41 56 push %r14
2a: 53 push %rbx
2b: 65 ff 05 9c 8c 91 7e incl %gs:0x7e918c9c(%rip) # 0x7e918cce
32: e8 cf f6 b9 08 callq 0x8b9f706
37: 89 c3 mov %eax,%ebx
39: 83 f8 08 cmp $0x8,%eax