INFO: task kworker/u4:9:5251 blocked for more than 143 seconds. Not tainted 6.2.0-rc6-syzkaller-00163-g66a87fff1a87 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:9 state:D stack:25856 pid:5251 ppid:2 flags:0x00004000 Workqueue: writeback wb_workfn (flush-btrfs-26) Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xb8a/0x5450 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 io_schedule+0xbe/0x130 kernel/sched/core.c:8868 folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1297 lock_page include/linux/pagemap.h:959 [inline] extent_write_cache_pages+0x836/0x16b0 fs/btrfs/extent_io.c:3071 extent_writepages+0x1ae/0x450 fs/btrfs/extent_io.c:3211 do_writepages+0x1af/0x690 mm/page-writeback.c:2581 __writeback_single_inode+0x159/0x1440 fs/fs-writeback.c:1598 writeback_sb_inodes+0x54d/0xf90 fs/fs-writeback.c:1889 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1960 wb_writeback+0x8d6/0xd70 fs/fs-writeback.c:2065 wb_check_background_flush fs/fs-writeback.c:2131 [inline] wb_do_writeback fs/fs-writeback.c:2219 [inline] wb_workfn+0xa16/0x12f0 fs/fs-writeback.c:2246 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task syz-executor.4:13061 blocked for more than 145 seconds. Not tainted 6.2.0-rc6-syzkaller-00163-g66a87fff1a87 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:27304 pid:13061 ppid:5110 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xb8a/0x5450 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 io_schedule+0xbe/0x130 kernel/sched/core.c:8868 folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1297 lock_page include/linux/pagemap.h:959 [inline] extent_write_cache_pages+0x836/0x16b0 fs/btrfs/extent_io.c:3071 extent_writepages+0x1ae/0x450 fs/btrfs/extent_io.c:3211 do_writepages+0x1af/0x690 mm/page-writeback.c:2581 filemap_fdatawrite_wbc mm/filemap.c:388 [inline] filemap_fdatawrite_wbc+0x147/0x1b0 mm/filemap.c:378 __filemap_fdatawrite_range+0xb8/0xf0 mm/filemap.c:421 btrfs_release_file+0x131/0x180 fs/btrfs/file.c:1720 __fput+0x27c/0xa90 fs/file_table.c:320 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+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe1c3a3df7b RSP: 002b:00007ffc3c9f90a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007fe1c3a3df7b RDX: 0000001b31f20000 RSI: 0000001b31f358b8 RDI: 0000000000000004 RBP: 00007fe1c3bad980 R08: 0000000000000000 R09: 000000003b8ab36e R10: 00007ffc3cae3090 R11: 0000000000000293 R12: 00000000000c3567 R13: 00007ffc3c9f91a0 R14: 00007ffc3c9f91c0 R15: 0000000000000032 INFO: task syz-executor.4:13063 blocked for more than 146 seconds. Not tainted 6.2.0-rc6-syzkaller-00163-g66a87fff1a87 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:24944 pid:13063 ppid:5110 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xb8a/0x5450 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 wait_on_state fs/btrfs/extent-io-tree.c:707 [inline] wait_extent_bit+0x56e/0x670 fs/btrfs/extent-io-tree.c:751 lock_extent+0x120/0x1c0 fs/btrfs/extent-io-tree.c:1742 find_lock_delalloc_range+0x3a0/0x690 fs/btrfs/extent_io.c:488 writepage_delalloc+0x16a/0x3e0 fs/btrfs/extent_io.c:1863 __extent_writepage+0xff0/0x1540 fs/btrfs/extent_io.c:2174 extent_write_cache_pages+0x614/0x16b0 fs/btrfs/extent_io.c:3091 extent_writepages+0x1ae/0x450 fs/btrfs/extent_io.c:3211 do_writepages+0x1af/0x690 mm/page-writeback.c:2581 filemap_fdatawrite_wbc mm/filemap.c:388 [inline] filemap_fdatawrite_wbc+0x147/0x1b0 mm/filemap.c:378 __filemap_fdatawrite_range+0xb8/0xf0 mm/filemap.c:421 btrfs_fdatawrite_range+0x4a/0x110 fs/btrfs/file.c:3857 start_ordered_ops.constprop.0+0xaa/0x110 fs/btrfs/file.c:1737 btrfs_sync_file+0x2b1/0x13c0 fs/btrfs/file.c:1813 vfs_fsync_range+0x13e/0x230 fs/sync.c:188 generic_write_sync include/linux/fs.h:2885 [inline] btrfs_do_write_iter+0x67d/0x1470 fs/btrfs/file.c:1684 call_write_iter include/linux/fs.h:2189 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x9ed/0xdd0 fs/read_write.c:584 ksys_write+0x12b/0x250 fs/read_write.c:637 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: 0033:0x7fe1c3a8c0c9 RSP: 002b:00007fe1c470b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fe1c3babf80 RCX: 00007fe1c3a8c0c9 RDX: 0000000000000128 RSI: 0000000020004400 RDI: 0000000000000006 RBP: 00007fe1c3ae7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc3c9f903f R14: 00007fe1c470b300 R15: 0000000000022000 INFO: task syz-executor.4:13116 blocked for more than 146 seconds. Not tainted 6.2.0-rc6-syzkaller-00163-g66a87fff1a87 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:26552 pid:13116 ppid:5110 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xb8a/0x5450 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 io_schedule+0xbe/0x130 kernel/sched/core.c:8868 folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1297 lock_page include/linux/pagemap.h:959 [inline] btrfs_page_mkwrite+0x769/0x1140 fs/btrfs/inode.c:8527 do_page_mkwrite+0x19b/0x680 mm/memory.c:2947 wp_page_shared mm/memory.c:3295 [inline] do_wp_page+0x353/0x3370 mm/memory.c:3377 handle_pte_fault mm/memory.c:4949 [inline] __handle_mm_fault+0x1f58/0x3c90 mm/memory.c:5073 handle_mm_fault+0x1b6/0x850 mm/memory.c:5219 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:copy_user_generic_string+0x30/0x50 arch/x86/lib/copy_user_64.S:133 Code: cb 83 fa 08 72 27 89 f9 83 e1 07 74 15 83 e9 08 f7 d9 29 ca 8a 06 88 07 48 ff c6 48 ff c7 ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 2c 66 66 RSP: 0018:ffffc90004e1f730 EFLAGS: 00050246 RAX: 0000000000000001 RBX: 0000000000000038 RCX: 0000000000000007 RDX: 0000000000000000 RSI: ffffc90004e1f7a0 RDI: 0000000020000120 RBP: 0000000020000120 R08: 0000000000000000 R09: ffffc90004e1f7d7 R10: fffff520009c3efa R11: 0000000000000000 R12: 00007fffffffefc8 R13: ffffc90004e1f7a0 R14: 0000000020000120 R15: ffffc90004e1f7a0 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline] _copy_to_user lib/usercopy.c:34 [inline] _copy_to_user+0x127/0x150 lib/usercopy.c:27 copy_to_user include/linux/uaccess.h:169 [inline] fiemap_fill_next_extent+0x217/0x370 fs/ioctl.c:144 emit_fiemap_extent+0x18e/0x380 fs/btrfs/extent_io.c:3458 fiemap_process_hole+0x21c/0x610 fs/btrfs/extent_io.c:3669 extent_fiemap+0x1428/0x1920 fs/btrfs/extent_io.c:3930 btrfs_fiemap+0xe9/0x170 fs/btrfs/inode.c:8209 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x466/0x15b0 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x10c/0x210 fs/ioctl.c:856 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: 0033:0x7fe1c3a8c0c9 RSP: 002b:00007fe1bb1fe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe1c3bac050 RCX: 00007fe1c3a8c0c9 RDX: 0000000020000100 RSI: 00000000c020660b RDI: 0000000000000005 RBP: 00007fe1c3ae7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc3c9f903f R14: 00007fe1bb1fe300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/0:0/7: #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:1280 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc900000c7da8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 3 locks held by kworker/u4:1/11: #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90000107da8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffffffff8e0ae790 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb10 net/core/net_namespace.c:568 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8c78f7b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: #0: ffffffff8c78f4b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/28: #0: ffffffff8c790300 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494 2 locks held by udevd/4431: 2 locks held by getty/4752: #0: ffff88802bea3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177 2 locks held by kworker/0:7/5200: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90004b2fda8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 2 locks held by kworker/u4:8/5248: #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90004e0fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 3 locks held by kworker/u4:9/5251: #0: ffff8881435a7138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881435a7138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8881435a7138 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff8881435a7138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff8881435a7138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff8881435a7138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90004cffda8 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffff88807e45a0e0 (&type->s_umount_key#57){++++}-{3:3}, at: trylock_super+0x21/0x110 fs/super.c:415 2 locks held by syz-executor.4/13063: #0: ffff8880285d1768 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe7/0x100 fs/file.c:1046 #1: ffff88807e45a460 (sb_writers#18){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:637 3 locks held by syz-executor.4/13116: #0: ffff888023300a18 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff888023300a18 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x276/0x1210 arch/x86/mm/fault.c:1369 #1: ffff88807e45a558 (sb_pagefaults#3){.+.+}-{0:0}, at: do_page_mkwrite+0x19b/0x680 mm/memory.c:2947 #2: ffff888030273e28 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x6d5/0x1140 fs/btrfs/inode.c:8526 4 locks held by syz-executor.3/14507: 1 lock held by syz-executor.3/14509: #0: ffffffff8d208168 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2043 [inline] #0: ffffffff8d208168 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x59c/0xfb0 drivers/tty/tty_io.c:2126 3 locks held by syz-executor.3/14518: 1 lock held by syz-executor.0/14506: 1 lock held by syz-executor.1/14517: 1 lock held by syz-executor.1/14519: #0: ffff888025d6a458 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline] #0: ffff888025d6a458 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x159/0x280 mm/util.c:518 1 lock held by udevadm/14512: 2 locks held by syz-executor.4/14513: 1 lock held by syz-executor.2/14514: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc6-syzkaller-00163-g66a87fff1a87 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x333/0x3c0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xc75/0xfc0 kernel/hung_task.c:377 kthread+0x2e8/0x3a0 kernel/kthread.c:376 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: 5093 Comm: syz-executor.0 Not tainted 6.2.0-rc6-syzkaller-00163-g66a87fff1a87 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:pick_task_rt+0x0/0x110 kernel/sched/rt.c:1800 Code: 00 00 00 be 08 00 00 00 65 48 8b 1c 25 00 ac 03 00 48 89 df e8 91 e0 71 00 f0 80 0b 08 31 c0 5b c3 e8 04 dd 71 00 eb d4 66 90 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 53 48 89 fb 48 81 c7 40 RSP: 0018:ffffc900041efad0 EFLAGS: 00000046 RAX: 1ffffffff18265d6 RBX: dffffc0000000000 RCX: 1ffff11027fdf00d RDX: 1ffff110173277e5 RSI: ffffffff8409eb4b RDI: ffff8880b993b580 RBP: ffffc900041efc58 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000000 R12: ffff8880b993b580 R13: 0000000000000001 R14: ffffffff8c132e60 R15: 0000000000000000 FS: 000055555693d400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020008000 CR3: 0000000045a2e000 CR4: 0000000000350ee0 Call Trace: pick_task kernel/sched/core.c:5966 [inline] pick_next_task kernel/sched/core.c:6098 [inline] __schedule+0x177c/0x5450 kernel/sched/core.c:6570 schedule+0xde/0x1b0 kernel/sched/core.c:6682 do_nanosleep+0x154/0x4f0 kernel/time/hrtimer.c:2044 hrtimer_nanosleep+0x1fd/0x4b0 kernel/time/hrtimer.c:2097 common_nsleep+0xa6/0xd0 kernel/time/posix-timers.c:1236 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1276 [inline] __se_sys_clock_nanosleep kernel/time/posix-timers.c:1254 [inline] __x64_sys_clock_nanosleep+0x2f8/0x430 kernel/time/posix-timers.c:1254 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: 0033:0x7f4f47cb0df1 Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f RSP: 002b:00007ffe198a1330 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 0000000000000537 RCX: 00007f4f47cb0df1 RDX: 00007ffe198a1370 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffe198a13fc R08: 0000000000000000 R09: 00007ffe1991d080 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 00000000000e9d15 R14: 0000000000000018 R15: 00007ffe198a1460