QAT: Invalid ioctl QAT: Invalid ioctl INFO: task rs:main Q:Reg:4345 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. rs:main Q:Reg D21216 4345 1 0x00000000 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 file_start_write include/linux/fs.h:2782 [inline] vfs_write+0x42a/0x560 fs/read_write.c:548 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f5139d2619d Code: Bad RIP value. RSP: 002b:00007f51382c7000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000044 RCX: 00007f5139d2619d RDX: 0000000000000044 RSI: 0000000001256a90 RDI: 0000000000000005 RBP: 0000000001256a90 R08: 00000000012779c0 R09: 30303220205b203a R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f51382c7480 R14: 0000000000000001 R15: 0000000001256890 INFO: task syz-executor7:4485 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor7 D21352 4485 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: c0 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 89 74 24 28 48 83 c0 02 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 8d 7e 20 40 80 10 73 64 48 83 fa 02 7e c2 0f b6 54 0b 01 8d 7a 80 40 80 ff 3f RSP: 002b:00007ffee81b2e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007ffee81b2e30 RSI: 00007ffee81b2ec0 RDI: 00007ffee81b2ec0 RBP: 00007ffee81b4bd0 R08: 0000000000000000 R09: 000000000000000c R10: 0000000000000006 R11: 0000000000000206 R12: 00000000026a7940 R13: 0000000000000000 R14: 00007ffee81b45a0 R15: 0000000000702140 INFO: task syz-executor0:4486 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D22032 4486 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_rmdir+0x1a3/0x630 fs/namei.c:3966 __do_sys_rmdir fs/namei.c:4000 [inline] __se_sys_rmdir fs/namei.c:3998 [inline] __x64_sys_rmdir+0x36/0x40 fs/namei.c:3998 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b97 Code: 48 83 c4 08 c3 8d 7e 20 40 80 ff 10 73 64 48 83 fa 02 7e c2 0f b6 54 0b 01 8d 7a 80 40 80 ff 3f 77 b4 0f b6 4c 0b 02 8d 59 80 <80> fb 3f 77 a7 83 e6 0f c1 e6 0c 83 e2 3f c1 e2 06 09 f2 83 e1 3f RSP: 002b:00007ffc8e674508 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455b97 RDX: 0000000000000000 RSI: 00007ffc8e6762b0 RDI: 00007ffc8e6762b0 RBP: 00007ffc8e6762b0 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000202 R12: 0000000000ace940 R13: 0000000000000000 R14: 00007ffc8e675c80 R15: 0000000000702140 INFO: task syz-executor4:4487 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D21352 4487 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: c0 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 89 74 24 28 48 83 c0 02 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 8d 7e 20 40 80 10 73 64 48 83 fa 02 7e c2 0f b6 54 0b 01 8d 7a 80 40 80 ff 3f RSP: 002b:00007ffd17545968 EFLAGS: 00000202 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007ffd17545970 RSI: 00007ffd17545a00 RDI: 00007ffd17545a00 RBP: 00007ffd17547710 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000202 R12: 0000000001d88940 R13: 0000000000000000 R14: 00007ffd175470e0 R15: 0000000000702140 INFO: task syz-executor3:4488 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D21352 4488 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 filename_create+0x13e/0x5b0 fs/namei.c:3671 user_path_create fs/namei.c:3734 [inline] do_mkdirat+0xda/0x310 fs/namei.c:3873 __do_sys_mkdir fs/namei.c:3897 [inline] __se_sys_mkdir fs/namei.c:3895 [inline] __x64_sys_mkdir+0x5c/0x80 fs/namei.c:3895 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455267 Code: 00 00 48 8b 4c 24 78 8b 44 01 04 89 44 24 08 48 8b 84 24 c8 00 00 00 48 89 04 24 e8 53 e7 ff ff 48 8b 44 24 10 48 89 84 24 d0 <00> 00 00 48 8b 8c 24 f8 00 00 00 48 8b 54 24 78 8b 4c 0a 04 89 4c RSP: 002b:00007ffd21a760f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd21a76120 RCX: 0000000000455267 RDX: 00007ffd21a76dd5 RSI: 00000000000001ff RDI: 00007ffd21a76dd0 RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000000000005 R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000001380 R14: 00007ffd21a767a0 R15: 00000000007034c0 INFO: task syz-executor5:4490 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D21920 4490 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: c0 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 89 74 24 28 48 83 c0 02 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 8d 7e 20 40 80 10 73 64 48 83 fa 02 7e c2 0f b6 54 0b 01 8d 7a 80 40 80 ff 3f RSP: 002b:00007ffc17135fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007ffc17135ff0 RSI: 00007ffc17136080 RDI: 00007ffc17136080 RBP: 00007ffc17137d90 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000206 R12: 0000000002430940 R13: 0000000000000000 R14: 00007ffc17137760 R15: 0000000000702140 INFO: task syz-executor2:4492 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D21232 4492 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: c0 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 89 74 24 28 48 83 c0 02 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 8d 7e 20 40 80 10 73 64 48 83 fa 02 7e c2 0f b6 54 0b 01 8d 7a 80 40 80 ff 3f RSP: 002b:00007ffce6bba5a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007ffce6bba5b0 RSI: 00007ffce6bba640 RDI: 00007ffce6bba640 RBP: 00007ffce6bbc350 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000202 R12: 00000000014ff940 R13: 0000000000000000 R14: 00007ffce6bbbd20 R15: 0000000000702140 INFO: task syz-executor1:14451 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D23664 14451 4489 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_pagefault include/linux/fs.h:1614 [inline] ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6127 do_page_mkwrite+0x14e/0x520 mm/memory.c:2386 wp_page_shared mm/memory.c:2682 [inline] do_wp_page+0xf78/0x19b0 mm/memory.c:2782 handle_pte_fault mm/memory.c:3995 [inline] __handle_mm_fault+0x2aab/0x4480 mm/memory.c:4103 handle_mm_fault+0x53e/0xc80 mm/memory.c:4140 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1397 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1472 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0033:0x4084b0 Code: 24 1f e9 d2 00 00 00 48 ff c2 48 83 fa 08 0f 83 ad 00 00 00 84 01 0f b6 1c 11 38 d8 75 e9 48 89 54 24 20 48 8b 5c 24 48 0f b6 <73> 50 48 0f af f2 0f b6 5b 51 48 89 cf 48 8d 74 3e 08 84 db 74 7c RSP: 002b:00007fffcd0db690 EFLAGS: 00010287 RAX: 0000001b2bc20578 RBX: 0000000000000000 RCX: 0000001b2cc20000 RDX: 0000001b2bc2057c RSI: 00000000007301f0 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fffcd0db6d0 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000002 R14: 000000000072bea0 R15: 000000000072bea0 INFO: task syz-executor6:14459 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor6 D24704 14459 4491 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 filename_create+0x13e/0x5b0 fs/namei.c:3671 user_path_create fs/namei.c:3734 [inline] do_symlinkat+0xfe/0x2d0 fs/namei.c:4188 __do_sys_symlink fs/namei.c:4214 [inline] __se_sys_symlink fs/namei.c:4212 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4212 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b57 Code: 80 80 fa 3f 77 10 83 e6 1f c1 e6 06 83 e1 3f 09 ce 83 fe 7f 7f 19 c7 44 24 28 fd ff 00 00 48 ff c0 48 89 44 24 30 48 8b 2c 24 <48> 83 c4 08 c3 89 74 24 28 48 83 c0 02 48 89 44 24 30 48 8b 2c 24 RSP: 002b:00007ffe4ad4b5e8 EFLAGS: 00000217 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 0000000000455b57 RDX: 0000000000000000 RSI: 00000000004bb371 RDI: 00007ffe4ad4c2e0 RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000000c47940 R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffe4ad4bc90 R15: 00000000007034c0 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 901 Comm: khungtaskd Not tainted 4.18.0-rc4-next-20180710+ #3 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+0x1c9/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:143 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb39/0x10b0 kernel/hung_task.c:265 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54