INFO: task syz-executor727:321 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-executor727 state:D stack:28816 pid:  321 ppid:   319 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: 0033:0x401c10
Code: Bad RIP value.
RSP: 002b:00007fffcf515bd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: 0000000000000004 RBX: 0000000000000000 RCX: 0000000000401c10
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007fffcf515bf0
RBP: 00000000006d0018 R08: 0000000000000000 R09: 000000000000000f
R10: 0000000000000064 R11: 0000000000000246 R12: 0000000000402c30
R13: 0000000000402cc0 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor727:326 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-executor727 state:D stack:26744 pid:  326 ppid:   322 flags:0x80000002
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
 __do_sys_exit_group kernel/exit.c:914 [inline]
 __se_sys_exit_group kernel/exit.c:912 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:912
 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x444788
Code: Bad RIP value.
RSP: 002b:00007fffcf515c48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444788
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004c43d0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d9420 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor727:327 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-executor727 state:D stack:28160 pid:  327 ppid:   325 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: 0033:0x401c10
Code: Bad RIP value.
RSP: 002b:00007fffcf515bd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: 0000000000000004 RBX: 0000000000000000 RCX: 0000000000401c10
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007fffcf515bf0
RBP: 00000000006d0018 R08: 0000000000000000 R09: 000000000000000f
R10: 0000000000000064 R11: 0000000000000246 R12: 0000000000402c30
R13: 0000000000402cc0 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor727:328 blocked for more than 144 seconds.
      Not tainted 5.9.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor727 state:D stack:28816 pid:  328 ppid:   320 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: 0033:0x445b39
Code: Bad RIP value.
RSP: 002b:00007fffcf515c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000445b39
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000006d0018 R08: 000000000000000f R09: 00000000004002e0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402c30
R13: 0000000000402cc0 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor727:333 blocked for more than 144 seconds.
      Not tainted 5.9.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor727 state:D stack:28544 pid:  333 ppid:   324 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: 0033:0x445b39
Code: Bad RIP value.
RSP: 002b:00007fffcf515c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000445b39
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000006d0018 R08: 000000000000000f R09: 00000000004002e0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402c30
R13: 0000000000402cc0 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor727:334 blocked for more than 144 seconds.
      Not tainted 5.9.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor727 state:D stack:28792 pid:  334 ppid:   323 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: 0033:0x401c10
Code: Bad RIP value.
RSP: 002b:00007fffcf515bd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: 0000000000000004 RBX: 0000000000000000 RCX: 0000000000401c10
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007fffcf515bf0
RBP: 00000000006d0018 R08: 0000000000000000 R09: 000000000000000f
R10: 0000000000000064 R11: 0000000000000246 R12: 0000000000402c30
R13: 0000000000402cc0 R14: 0000000000000000 R15: 0000000000000000

Showing all locks held in the system:
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/229:
 #0: ffff8881c9834370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930

=============================================

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:
NMI backtrace for cpu 0
CPU: 0 PID: 116 Comm: systemd-journal Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:write_comp_data+0xa/0x80 kernel/kcov.c:217
Code: 65 48 8b 04 25 40 ef 01 00 48 8b 80 48 13 00 00 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 49 89 f2 65 8b 05 e6 f6 c1 7e <65> 48 8b 34 25 40 ef 01 00 a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b
RSP: 0018:ffff8881d1e7fc08 EFLAGS: 00000246
RAX: 0000000080000001 RBX: dffffc0000000000 RCX: ffffffff814aacd9
RDX: 00000000000000a4 RSI: 0000000000000027 RDI: 0000000000000006
RBP: ffff8881d1e7fcd8 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000027 R11: 0000000000000000 R12: 00000000000000a4
R13: ffffed103a3cff9d R14: 0000000000000027 R15: ffffc900008cc0c0
FS:  00007f2f415758c0(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2f3e8fd018 CR3: 00000001d2b2b000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ___bpf_prog_run+0x4419/0x6640 kernel/bpf/core.c:1585
 __bpf_prog_run32+0x8f/0xd0 kernel/bpf/core.c:1681
 bpf_dispatcher_nop_func include/linux/bpf.h:586 [inline]
 bpf_prog_run_pin_on_cpu include/linux/filter.h:597 [inline]
 seccomp_run_filters kernel/seccomp.c:324 [inline]
 __seccomp_filter+0x14e/0x14c0 kernel/seccomp.c:937
 __secure_computing+0xac/0x290 kernel/seccomp.c:1070
 syscall_trace_enter kernel/entry/common.c:58 [inline]
 syscall_enter_from_user_mode+0xee/0x270 kernel/entry/common.c:81
 do_syscall_64+0xf/0x40 arch/x86/entry/common.c:41
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f2f4080ef17
Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 <c3> 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007ffea95df988 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 0000000000000074 RCX: 00007f2f4080ef17
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 000055adad8d71e0
RBP: 000055adad8d71e0 R08: 0000000000000008 R09: 000055adad8d925c
R10: 00007ffea95e9080 R11: 0000000000000202 R12: ffffffffffffffff
R13: 00007ffea95dfa58 R14: 000055adad4b0958 R15: 0005addba89e1b8e