INFO: task kworker/u4:6:2859 blocked for more than 143 seconds. Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:6 state:D stack:25520 pid:2859 ppid:2 flags:0x00004000 Workqueue: writeback wb_workfn (flush-7:4) Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x1d15/0x5790 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 queue_log_writer+0x293/0x2f0 fs/reiserfs/journal.c:2980 check_journal_end fs/reiserfs/journal.c:3674 [inline] do_journal_end+0x908/0x4af0 fs/reiserfs/journal.c:4040 reiserfs_write_inode+0x27e/0x2d0 fs/reiserfs/inode.c:1779 write_inode fs/fs-writeback.c:1456 [inline] __writeback_single_inode+0x9f2/0xdb0 fs/fs-writeback.c:1668 writeback_sb_inodes+0x54d/0xe70 fs/fs-writeback.c:1894 wb_writeback+0x155/0xa40 fs/fs-writeback.c:2070 wb_do_writeback fs/fs-writeback.c:2217 [inline] wb_workfn+0x2a5/0xcc0 fs/fs-writeback.c:2257 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2407 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2554 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task syz-executor190:8140 blocked for more than 143 seconds. Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor190 state:D stack:24696 pid:8140 ppid:5045 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x1d15/0x5790 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 bit_wait+0x16/0xe0 kernel/sched/wait_bit.c:199 __wait_on_bit+0x64/0x180 kernel/sched/wait_bit.c:49 __inode_wait_for_writeback+0x153/0x1f0 fs/fs-writeback.c:1477 inode_wait_for_writeback+0x26/0x40 fs/fs-writeback.c:1489 evict+0x2b7/0x6b0 fs/inode.c:662 iput_final fs/inode.c:1747 [inline] iput fs/inode.c:1773 [inline] iput+0x4a7/0x7a0 fs/inode.c:1759 dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401 d_delete fs/dcache.c:2565 [inline] d_delete+0x16f/0x1c0 fs/dcache.c:2554 xattr_unlink+0x139/0x190 fs/reiserfs/xattr.c:97 lookup_and_delete_xattr fs/reiserfs/xattr.c:495 [inline] reiserfs_xattr_set_handle+0x7bd/0xb00 fs/reiserfs/xattr.c:530 reiserfs_xattr_set+0x454/0x5b0 fs/reiserfs/xattr.c:634 trusted_set+0xa7/0xd0 fs/reiserfs/xattr_trusted.c:31 __vfs_removexattr+0x155/0x1c0 fs/xattr.c:519 __vfs_removexattr_locked+0x1b0/0x440 fs/xattr.c:554 vfs_removexattr+0xcf/0x260 fs/xattr.c:576 ovl_do_removexattr fs/overlayfs/overlayfs.h:273 [inline] ovl_removexattr fs/overlayfs/overlayfs.h:281 [inline] ovl_make_workdir fs/overlayfs/super.c:1353 [inline] ovl_get_workdir fs/overlayfs/super.c:1436 [inline] ovl_fill_super+0x6ec5/0x7270 fs/overlayfs/super.c:1992 mount_nodev+0x64/0x120 fs/super.c:1426 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x350 fs/super.c:1510 do_new_mount fs/namespace.c:3039 [inline] path_mount+0x134b/0x1e40 fs/namespace.c:3369 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc1a7a61ad9 RSP: 002b:00007fc1a7a0d2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fc1a7ae7780 RCX: 00007fc1a7a61ad9 RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00007fc1a7ab4318 R08: 0000000020000480 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 7269647265776f6c R13: 0079616c7265766f R14: 9837512483e3bdcd R15: 00007fc1a7ae7788 INFO: task syz-executor190:8153 blocked for more than 144 seconds. Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor190 state:D stack:28496 pid:8153 ppid:5045 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x1d15/0x5790 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 wb_wait_for_completion+0x182/0x240 fs/fs-writeback.c:192 sync_inodes_sb+0x1aa/0xa60 fs/fs-writeback.c:2736 sync_filesystem.part.0+0xe6/0x1d0 fs/sync.c:64 sync_filesystem+0x8f/0xc0 fs/sync.c:43 reiserfs_remount+0x129/0x1650 fs/reiserfs/super.c:1445 legacy_reconfigure+0x119/0x180 fs/fs_context.c:633 reconfigure_super+0x40c/0xa30 fs/super.c:956 do_remount fs/namespace.c:2701 [inline] path_mount+0x1846/0x1e40 fs/namespace.c:3361 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc1a7a62f9a RSP: 002b:00007fc19f9ec128 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fc19f9ec6b8 RCX: 00007fc1a7a62f9a RDX: 00000000200000c0 RSI: 0000000020000100 RDI: 0000000000000000 RBP: 00000000ffffffff R08: 00007fc19f9ec1c0 R09: 0000000020000000 R10: 0000000001a484bc R11: 0000000000000286 R12: 0000000020000100 R13: 00000000200000c0 R14: 0000000000000000 R15: 00000000200009c0 Showing all locks held in the system: 3 locks held by kworker/0:0/7: #0: ffff8880b983c5d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:558 #1: ffff8880b9828848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2de/0x950 kernel/sched/psi.c:995 #2: ffff8880b982a7d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5a/0x1f0 kernel/time/timer.c:999 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8c798530 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522 1 lock held by rcu_tasks_trace/14: #0: ffffffff8c798230 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522 1 lock held by khungtaskd/28: #0: ffffffff8c799140 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6559 2 locks held by kworker/u4:5/1069: #0: ffff888145a5d938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888145a5d938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888145a5d938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] #0: ffff888145a5d938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] #0: ffff888145a5d938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] #0: ffff888145a5d938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378 #1: ffffc9000628fdb0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2382 2 locks held by kworker/u4:6/2859: #0: ffff888145a5d938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888145a5d938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888145a5d938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] #0: ffff888145a5d938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] #0: ffff888145a5d938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] #0: ffff888145a5d938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378 #1: ffffc9000dbe7db0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2382 2 locks held by syslogd/4439: 2 locks held by getty/4762: #0: ffff88814aff2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176 1 lock held by syz-executor190/5041: #0: ffff88806ff4a0e0 (&type->s_umount_key#42){+.+.}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361 1 lock held by syz-executor190/5042: #0: ffff8880241e40e0 (&type->s_umount_key#42){+.+.}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361 2 locks held by syz-executor190/5043: #0: ffff8880781b20e0 (&type->s_umount_key#42){+.+.}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361 #1: ffffffff8c7a4538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #1: ffffffff8c7a4538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e8/0x770 kernel/rcu/tree_exp.h:992 2 locks held by syz-executor190/5044: #0: ffff8880781c40e0 (&type->s_umount_key#42){+.+.}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361 #1: ffffffff8c7a4538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #1: ffffffff8c7a4538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x64a/0x770 kernel/rcu/tree_exp.h:992 4 locks held by syz-executor190/8140: #0: ffff8880780280e0 (&type->s_umount_key#41/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228 #1: ffff888070d00460 (sb_writers#9){.+.+}-{0:0}, at: ovl_make_workdir fs/overlayfs/super.c:1282 [inline] #1: ffff888070d00460 (sb_writers#9){.+.+}-{0:0}, at: ovl_get_workdir fs/overlayfs/super.c:1436 [inline] #1: ffff888070d00460 (sb_writers#9){.+.+}-{0:0}, at: ovl_fill_super+0x1c5e/0x7270 fs/overlayfs/super.c:1992 #2: ffff8880743a1020 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #2: ffff8880743a1020 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: vfs_removexattr+0xbb/0x260 fs/xattr.c:575 #3: ffff88807433ece0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline] #3: ffff88807433ece0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: lookup_and_delete_xattr fs/reiserfs/xattr.c:487 [inline] #3: ffff88807433ece0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: reiserfs_xattr_set_handle+0x72c/0xb00 fs/reiserfs/xattr.c:530 2 locks held by syz-executor190/8153: #0: ffff888070d000e0 (&type->s_umount_key#42){+.+.}-{3:3}, at: do_remount fs/namespace.c:2698 [inline] #0: ffff888070d000e0 (&type->s_umount_key#42){+.+.}-{3:3}, at: path_mount+0x1401/0x1e40 fs/namespace.c:3361 #1: ffff8881413847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] #1: ffff8881413847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x190/0xa60 fs/fs-writeback.c:2734 2 locks held by kworker/1:1/11701: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378 #1: ffffc9000425fdb0 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2382 4 locks held by syz-executor190/12511: #0: ffff8880270a00e0 (&type->s_umount_key#41/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228 #1: ffff888079c06460 (sb_writers#9){.+.+}-{0:0}, at: ovl_make_workdir fs/overlayfs/super.c:1282 [inline] #1: ffff888079c06460 (sb_writers#9){.+.+}-{0:0}, at: ovl_get_workdir fs/overlayfs/super.c:1436 [inline] #1: ffff888079c06460 (sb_writers#9){.+.+}-{0:0}, at: ovl_fill_super+0x1c5e/0x7270 fs/overlayfs/super.c:1992 #2: ffff888070016ce0 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #2: ffff888070016ce0 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: vfs_removexattr+0xbb/0x260 fs/xattr.c:575 #3: ffff888074316ce0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline] #3: ffff888074316ce0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: lookup_and_delete_xattr fs/reiserfs/xattr.c:487 [inline] #3: ffff888074316ce0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: reiserfs_xattr_set_handle+0x72c/0xb00 fs/reiserfs/xattr.c:530 2 locks held by syz-executor190/12522: #0: ffff888079c060e0 (&type->s_umount_key#42){+.+.}-{3:3}, at: do_remount fs/namespace.c:2698 [inline] #0: ffff888079c060e0 (&type->s_umount_key#42){+.+.}-{3:3}, at: path_mount+0x1401/0x1e40 fs/namespace.c:3361 #1: ffff88801f9ca7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] #1: ffff88801f9ca7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x190/0xa60 fs/fs-writeback.c:2734 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xe16/0x1090 kernel/hung_task.c:379 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5043 Comm: syz-executor190 Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:instrument_atomic_read include/linux/instrumented.h:68 [inline] RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] RIP: 0010:__page_table_check_zero+0xb1/0x1c0 mm/page_table_check.c:141 Code: 89 f7 e8 f2 16 a2 ff 4d 39 e6 0f 84 e7 00 00 00 e8 24 1b a2 ff 48 85 ed 0f 84 bd 00 00 00 e8 16 1b a2 ff 48 8b 1d 3f 44 b2 0a 04 00 00 00 48 01 eb 48 89 df e8 7f 21 f5 ff 48 89 d8 48 c1 e8 RSP: 0018:ffffc90003acf6c8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000040 RCX: 0000000000000000 RDX: ffff888024269dc0 RSI: ffffffff81e2089a RDI: 0000000000000006 RBP: ffff888016072c00 R08: 0000000000000006 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000094001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: dffffc0000000000 FS: 0000555556286300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc19f9ed000 CR3: 000000002a6ea000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: page_table_check_free include/linux/page_table_check.h:46 [inline] free_pages_prepare mm/page_alloc.c:1303 [inline] free_unref_page_prepare+0x616/0xb90 mm/page_alloc.c:2600 free_unref_page_list+0xe3/0xa70 mm/page_alloc.c:2741 release_pages+0xcd8/0x1380 mm/swap.c:1042 __pagevec_release+0x77/0xe0 mm/swap.c:1062 pagevec_release include/linux/pagevec.h:63 [inline] folio_batch_release include/linux/pagevec.h:132 [inline] shmem_undo_range+0x583/0x1240 mm/shmem.c:954 shmem_truncate_range mm/shmem.c:1064 [inline] shmem_evict_inode+0x32f/0xb60 mm/shmem.c:1179 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1747 [inline] iput fs/inode.c:1773 [inline] iput+0x4a7/0x7a0 fs/inode.c:1759 dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401 __dentry_kill+0x3c0/0x640 fs/dcache.c:607 dentry_kill fs/dcache.c:733 [inline] dput+0x865/0xe10 fs/dcache.c:913 __fput+0x3cc/0xa90 fs/file_table.c:329 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc1a7a62ed7 Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff20265538 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fc1a7a62ed7 RDX: 00007fff202655fb RSI: 000000000000000a RDI: 00007fff202655f0 RBP: 00007fff202655f0 R08: 00000000ffffffff R09: 00007fff202653d0 R10: 0000555556287653 R11: 0000000000000202 R12: 00007fff202666b0 R13: 00005555562875f0 R14: 00007fff20265560 R15: 00007fff202666d0 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.684 msecs