INFO: task syz-executor.1:4968 blocked for more than 143 seconds. Not tainted 5.15.178-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:22720 pid: 4968 ppid: 4483 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5027 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373 schedule+0x11b/0x1f0 kernel/sched/core.c:6456 wb_wait_for_completion+0x164/0x290 fs/fs-writeback.c:191 __writeback_inodes_sb_nr+0x2ce/0x370 fs/fs-writeback.c:2684 try_to_writeback_inodes_sb+0x94/0xb0 fs/fs-writeback.c:2732 ext4_nonda_switch fs/ext4/inode.c:2944 [inline] ext4_da_write_begin+0x228/0xb60 fs/ext4/inode.c:2971 generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3785 ext4_buffered_write_iter+0x227/0x360 fs/ext4/file.c:268 ext4_file_write_iter+0x1d1/0x1940 fs/ext4/file.c:662 __kernel_write+0x5b1/0xa60 fs/read_write.c:539 __dump_emit+0x264/0x3a0 fs/coredump.c:875 dump_user_range+0x91/0x320 fs/coredump.c:949 elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285 do_coredump+0x1852/0x31e0 fs/coredump.c:826 get_signal+0xc06/0x14e0 kernel/signal.c:2886 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320 exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562 asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:600 RIP: 0033:0x7fda7176edb1 RSP: 002b:0000000020000490 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fda7189d050 RCX: 00007fda7176eda9 RDX: 00000000200004c0 RSI: 0000000020000490 RDI: 0000000020004000 RBP: 00007fda717bb47a R08: 0000000020000540 R09: 0000000020000540 R10: 0000000020000500 R11: 0000000000000206 R12: 0000000000000000 R13: 000000000000006e R14: 00007fda7189d050 R15: 00007ffc02488138 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8cb1fce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 5 locks held by kworker/u4:1/144: 2 locks held by getty/3927: #0: ffff88814c683098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc90002cd62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158 2 locks held by kworker/u4:5/4650: #0: ffff8880b8f3a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475 #1: ffffc90002edfd20 ((work_completion)(&ei->i_rsv_conversion_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285 3 locks held by syz-executor.1/4968: #0: ffff88802cf50460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825 #1: ffff8880757083f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] #1: ffff8880757083f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xa0/0x360 fs/ext4/file.c:262 #2: ffff88802cf500e0 (&type->s_umount_key#32){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x1d/0xb0 fs/fs-writeback.c:2729 2 locks held by syz-executor.2/5589: #0: ffff88802cf50650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1813 [inline] #0: ffff88802cf50650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1930 [inline] #0: ffff88802cf50650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x375/0x1100 fs/ext4/inode.c:243 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:71 2 locks held by syz-executor.0/5593: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 2 locks held by syz-executor.0/5594: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf54990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x12b9/0x1570 fs/jbd2/transaction.c:462 2 locks held by syz-executor.3/5600: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 2 locks held by syz-executor.3/5605: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 2 locks held by syz-executor.4/5606: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 2 locks held by syz-executor.1/5607: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 2 locks held by syz-executor.4/5609: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 2 locks held by syz-executor.1/5620: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 2 locks held by syz-executor.4/5627: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 1 lock held by syz-executor.3/5632: 2 locks held by syz-executor.2/5639: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 2 locks held by syz-executor.3/5641: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 1 lock held by syz-executor.0/5648: 2 locks held by syz-executor.1/5661: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 1 lock held by syz-executor.1/5662: 2 locks held by syz-executor.4/5664: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 1 lock held by syz-executor.3/5667: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 2 locks held by syz-executor.2/5668: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:71 2 locks held by syz-executor.2/5760: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:71 2 locks held by syz-executor.3/5770: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:71 2 locks held by syz-executor.1/5773: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:71 2 locks held by syz-executor.3/5782: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:71 2 locks held by syz-executor.0/5784: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:71 2 locks held by syz-executor.2/5814: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:71 1 lock held by syz-executor.0/5873: 1 lock held by syz-executor.3/5882: 2 locks held by syz-executor.1/5968: 2 locks held by syz-executor.2/5970: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:71 2 locks held by syz-executor.4/5971: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:71 3 locks held by syz-executor.1/5974: 1 lock held by syz-executor.1/5999: 2 locks held by syz-executor.2/6003: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:71 1 lock held by syz-executor.0/6006: 2 locks held by syz-executor.2/6009: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802cf543f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:71 1 lock held by syz-executor.4/6016: 1 lock held by syz-executor.3/6035: 1 lock held by syz-executor.3/6036: 1 lock held by syz-executor.1/6049: 1 lock held by syz-executor.1/6052: 1 lock held by syz-executor.4/6055: 1 lock held by syz-executor.0/6058: 1 lock held by syz-executor.3/6069: 1 lock held by syz-executor.3/6106: 1 lock held by syz-executor.3/6225: 1 lock held by syz-executor.0/6464: 1 lock held by syz-executor.0/6607: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/6616: 1 lock held by syz-executor.0/6648: 1 lock held by syz-executor.2/6664: 1 lock held by syz-executor.3/7167: 1 lock held by syz-executor.3/7191: 1 lock held by syz-executor.2/7231: 1 lock held by syz-executor.1/7232: 3 locks held by syz-executor.4/10400: 1 lock held by syz-executor.1/10417: 1 lock held by syz-executor.3/10421: 1 lock held by syz-executor.3/10423: 1 lock held by syz-executor.2/10427: 2 locks held by syz-executor.2/10433: 1 lock held by syz-executor.1/10438: 3 locks held by syz-executor.4/10441: 1 lock held by syz-executor.3/10458: 1 lock held by syz-executor.3/10465: 1 lock held by syz-executor.0/10474: 1 lock held by syz-executor.4/10476: 2 locks held by syz-executor.0/10477: 1 lock held by syz-executor.2/10478: 1 lock held by syz-executor.2/10482: 4 locks held by syz-executor.4/10486: 3 locks held by syz-executor.1/10487: 1 lock held by syz-executor.1/10489: 1 lock held by syz-executor.2/10510: 1 lock held by syz-executor.0/10514: 5 locks held by syz-executor.4/10517: 1 lock held by syz-executor.2/10521: 1 lock held by syz-executor.3/10523: 1 lock held by syz-executor.0/10527: #0: ffff88802cf52bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 4 locks held by syz-executor.4/10550: 4 locks held by syz-executor.2/10557: 4 locks held by syz-executor.4/10560: 1 lock held by syz-executor.0/10561: 4 locks held by syz-executor.2/10567: 1 lock held by syz-executor.1/10571: 3 locks held by syz-executor.1/10573: 1 lock held by syz-executor.3/10574: 1 lock held by syz-executor.0/10588: 2 locks held by syz-executor.4/10598: 4 locks held by syz-executor.2/10603: 3 locks held by syz-executor.4/10604: 1 lock held by syz-executor.3/10605: 5 locks held by syz-executor.2/10608: 1 lock held by syz-executor.0/10628: 1 lock held by syz-executor.3/10651: 1 lock held by syz-executor.1/10658: 4 locks held by syz-executor.4/10659: 2 locks held by syz-executor.0/10680: 1 lock held by syz-executor.0/10682: 1 lock held by syz-executor.1/10698: 3 locks held by syz-executor.4/10699: 3 locks held by syz-executor.3/10700: 4 locks held by syz-executor.2/10706: 1 lock held by syz-executor.1/10708: 1 lock held by syz-executor.2/10710: 2 locks held by syz-executor.4/10711: 1 lock held by syz-executor.0/10714: 1 lock held by syz-executor.1/10747: 4 locks held by syz-executor.4/10765: 4 locks held by syz-executor.4/10778: 1 lock held by syz-executor.2/10783: 2 locks held by syz-executor.0/10795: 4 locks held by syz-executor.0/10803: 4 locks held by syz-executor.2/10843: 4 locks held by syz-executor.4/10937: 4 locks held by syz-executor.2/10964: 2 locks held by syz-executor.0/10971: 4 locks held by syz-executor.2/11275: 3 locks held by syz-executor.4/11425: 4 locks held by syz-executor.4/11583: 2 locks held by syz-executor.0/11593: 4 locks held by syz-executor.4/11669: 3 locks held by syz-executor.0/11775: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xe72/0xeb0 kernel/hung_task.c:295 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10133 Comm: kworker/u4:9 Not tainted 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3682 [inline] RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3701 [inline] RIP: 0010:validate_chain+0x1a6/0x5930 kernel/locking/lockdep.c:3756 Code: 8b 1b 48 85 db 74 48 48 83 c3 f8 74 42 4c 8d 7b 18 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 bd e3 66 00 49 8b 07 <4c> 39 f0 0f 84 d4 03 00 00 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 RSP: 0018:ffffc9000319f2e0 EFLAGS: 00000046 RAX: ab8b7698175fc666 RBX: ffffffff90a06f40 RCX: ffffffff816389a2 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9098c1a0 RBP: ffffc9000319f590 R08: dffffc0000000000 R09: fffffbfff2131835 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff8880249d2948 R14: ab8b7698175fc666 R15: ffffffff90a06f58 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007facf8158978 CR3: 00000000646dd000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 ext4_es_lookup_extent+0x151/0xa40 fs/ext4/extents_status.c:1002 ext4_map_blocks+0x1f6/0x1c70 fs/ext4/inode.c:566 ext4_convert_unwritten_extents+0x2e0/0x6c0 fs/ext4/extents.c:4867 ext4_convert_unwritten_io_end_vec+0xfd/0x170 fs/ext4/extents.c:4906 ext4_end_io_end fs/ext4/page-io.c:186 [inline] ext4_do_flush_completed_IO fs/ext4/page-io.c:259 [inline] ext4_end_io_rsv_work+0x368/0x6e0 fs/ext4/page-io.c:273 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287