INFO: task syz-executor.5:3840 blocked for more than 143 seconds.
Not tainted 5.9.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:28816 pid: 3840 ppid: 343 flags:0x80004006
Call Trace:
context_switch kernel/sched/core.c:3778 [inline]
__schedule+0x889/0x1f70 kernel/sched/core.c:4527
schedule+0xcd/0x2b0 kernel/sched/core.c:4602
wdm_flush+0x2e9/0x3c0 drivers/usb/class/cdc-wdm.c:590
filp_close+0xb4/0x170 fs/open.c:1276
close_files fs/file.c:401 [inline]
put_files_struct fs/file.c:429 [inline]
put_files_struct+0x1d0/0x350 fs/file.c:426
exit_files+0x7e/0xa0 fs/file.c:458
do_exit+0xb75/0x2890 kernel/exit.c:801
do_group_exit+0x125/0x310 kernel/exit.c:903
get_signal+0x42d/0x1f10 kernel/signal.c:2757
arch_do_signal+0x88/0x1a00 arch/x86/kernel/signal.c:811
exit_to_user_mode_loop kernel/entry/common.c:135 [inline]
exit_to_user_mode_prepare+0xf9/0x150 kernel/entry/common.c:166
syscall_exit_to_user_mode+0x36/0x260 kernel/entry/common.c:241
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ba81
Code: Bad RIP value.
RSP: 002b:00007ffddec9fd80 EFLAGS: 00000293 ORIG_RAX: 0000000000000023
RAX: fffffffffffffdfc RBX: 0000000000016c51 RCX: 000000000045ba81
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffddec9fd90
RBP: 0000000000000001 R08: 000000009f803759 R09: 000000009f80375d
R10: 00007ffddec9fe90 R11: 0000000000000293 R12: 000000000118cf40
R13: 000000000118d940 R14: ffffffffffffffff R15: 000000000118cfec
Showing all locks held in the system:
4 locks held by ksoftirqd/0/9:
1 lock held by khungtaskd/23:
#0: ffffffff87313620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x264 kernel/locking/lockdep.c:5825
1 lock held by in:imklog/238:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0xf6/0x16e lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x74/0xb6 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1da/0x1f4 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
watchdog+0xd6a/0xfd0 kernel/hung_task.c:295
kthread+0x392/0x470 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 1 to CPUs 0:
cdc_wdm 6-1:118.0: nonzero urb status received: -71
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_serial_out+0x68/0x80 drivers/tty/serial/8250/8250_port.c:454
Code: f1 00 00 00 48 8d 7d 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 d3 e3 80 3c 02 00 75 15 03 5d 40 44 89 e0 89 da ee <5b> 5d 41 5c c3 e8 de 3c 40 ff eb c7 e8 07 3d 40 ff eb e4 0f 1f 44
RSP: 0018:ffff8881db2094a8 EFLAGS: 00000002
RAX: 000000000000005b RBX: 00000000000003f8 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: ffffffff8229a391 RDI: ffffffff8a2bcaa0
RBP: ffffffff8a2bca60 R08: 0000000000000001 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000003254 R12: 000000000000005b
R13: 000000000000005b R14: ffffffff8a2bca60 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5f0dc1c020 CR3: 00000001d383c000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
uart_console_write+0x59/0x100 drivers/tty/serial/serial_core.c:1954
serial8250_console_write+0x8c5/0xa90 drivers/tty/serial/8250/8250_port.c:3310
call_console_drivers kernel/printk/printk.c:1824 [inline]
console_unlock+0x87a/0xcd0 kernel/printk/printk.c:2501
vprintk_emit+0x1b2/0x460 kernel/printk/printk.c:2029
dev_vprintk_emit+0x3eb/0x436 drivers/base/core.c:4133
dev_printk_emit+0xba/0xf1 drivers/base/core.c:4144
__dev_printk+0xcf/0xf5 drivers/base/core.c:4156
_dev_err+0xd7/0x109 drivers/base/core.c:4199
wdm_int_callback.cold+0x82/0x2a6 drivers/usb/class/cdc-wdm.c:252
__usb_hcd_giveback_urb+0x32d/0x560 drivers/usb/core/hcd.c:1650
usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1716
dummy_timer+0x11f2/0x3240 drivers/usb/gadget/udc/dummy_hcd.c:1967
call_timer_fn+0x1ac/0x6e0 kernel/time/timer.c:1413
expire_timers kernel/time/timer.c:1458 [inline]
__run_timers.part.0+0x67c/0xa60 kernel/time/timer.c:1755
__run_timers kernel/time/timer.c:1736 [inline]
run_timer_softirq+0x80/0x120 kernel/time/timer.c:1768
__do_softirq+0x1af/0x91c kernel/softirq.c:298
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
do_softirq_own_stack+0x73/0x90 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:393 [inline]
__irq_exit_rcu kernel/softirq.c:423 [inline]
irq_exit_rcu+0x107/0x1a0 kernel/softirq.c:435
sysvec_apic_timer_interrupt+0x43/0x90 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:49 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:acpi_safe_halt+0x72/0x90 drivers/acpi/processor_idle.c:112
Code: 74 06 5b e9 40 a2 8a fb e8 3b a2 8a fb e8 26 3b 90 fb e9 0c 00 00 00 e8 2c a2 8a fb 0f 00 2d e5 62 6f 00 e8 20 a2 8a fb fb f4 e8 18 35 90 fb 5b e9 12 a2 8a fb 48 89 df e8 4a 82 b4 fb eb ab
RSP: 0018:ffffffff87207cf0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffffffff1016041
RDX: ffffffff8722f240 RSI: ffffffff85b55ea0 RDI: ffffffff85b55e8a
RBP: ffff8881d8d69864 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8881d8d69864
R13: 1ffffffff0e40fa7 R14: ffff8881d8d69865 R15: 0000000000000001
acpi_idle_do_entry+0x15c/0x1b0 drivers/acpi/processor_idle.c:524
acpi_idle_enter+0x3fa/0xa50 drivers/acpi/processor_idle.c:650
cpuidle_enter_state+0xff/0x870 drivers/cpuidle/cpuidle.c:235
cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:346
call_cpuidle kernel/sched/idle.c:126 [inline]
cpuidle_idle_call kernel/sched/idle.c:214 [inline]
do_idle+0x3d6/0x5a0 kernel/sched/idle.c:276
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:372
start_kernel+0x458/0x479 init/main.c:1048
secondary_startup_64+0xb6/0xc0 arch/x86/kernel/head_64.S:243