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 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