INFO: task syz.0.121:5864 blocked for more than 143 seconds. Not tainted 6.11.0-rc2-syzkaller-00111-gee9a43b7cfe2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.121 state:D stack:27856 pid:5864 tgid:5846 ppid:5232 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 remove_inode_hugepages+0x30a/0xee0 fs/hugetlbfs/inode.c:665 hugetlbfs_evict_inode+0x22/0x70 fs/hugetlbfs/inode.c:690 evict+0x2ed/0x6c0 fs/inode.c:669 iput_final fs/inode.c:1803 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1829 iput+0x5c/0x80 fs/inode.c:1819 dentry_unlink_inode+0x29c/0x480 fs/dcache.c:407 __dentry_kill+0x1d0/0x600 fs/dcache.c:610 dput.part.0+0x4b1/0x9b0 fs/dcache.c:852 dput+0x1f/0x30 fs/dcache.c:842 __fput+0x54e/0xbb0 fs/file_table.c:430 task_work_run+0x14e/0x250 kernel/task_work.c:228 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xaa3/0x2bb0 kernel/exit.c:882 do_group_exit+0xd3/0x2a0 kernel/exit.c:1031 get_signal+0x25fd/0x2770 kernel/signal.c:2917 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe5b21779f9 RSP: 002b:00007fe5b2e6e038 EFLAGS: 00000246 ORIG_RAX: 000000000000010e RAX: 0000000000000007 RBX: 00007fe5b2306130 RCX: 00007fe5b21779f9 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000040 RBP: 00007fe5b21e58ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe5b2306130 R15: 00007ffcdf5a6dd8 INFO: task syz.4.123:5860 blocked for more than 144 seconds. Not tainted 6.11.0-rc2-syzkaller-00111-gee9a43b7cfe2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.123 state:D stack:24624 pid:5860 tgid:5860 ppid:5230 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 io_schedule+0xbf/0x130 kernel/sched/core.c:7401 folio_wait_bit_common+0x3d8/0x9b0 mm/filemap.c:1307 __folio_lock mm/filemap.c:1645 [inline] folio_lock include/linux/pagemap.h:1050 [inline] folio_lock include/linux/pagemap.h:1046 [inline] __filemap_get_folio+0x6ab/0xae0 mm/filemap.c:1898 filemap_lock_folio include/linux/pagemap.h:690 [inline] filemap_lock_hugetlb_folio include/linux/hugetlb.h:795 [inline] hugetlb_fault+0x16d4/0x27c0 mm/hugetlb.c:6531 handle_mm_fault+0x72a/0x7b0 mm/memory.c:5831 do_user_addr_fault+0x60d/0x13f0 arch/x86/mm/fault.c:1338 handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f8c3a24b1d0 RSP: 002b:00007fff8cc29ca0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffffff7fffff RDX: b51162a3107163ea RSI: 0000000020800000 RDI: 0000555576a923c8 RBP: 00007fff8cc29d70 R08: 00007f8c3a200000 R09: 0000000000000008 R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000032 R13: 00007fff8cc29d90 R14: 00007fff8cc29db0 R15: fffffffffffffffe INFO: task syz.4.123:5861 blocked for more than 145 seconds. Not tainted 6.11.0-rc2-syzkaller-00111-gee9a43b7cfe2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.123 state:D stack:27648 pid:5861 tgid:5860 ppid:5230 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 hugetlb_wp+0x1e16/0x2980 mm/hugetlb.c:6027 hugetlb_fault+0x1f28/0x27c0 mm/hugetlb.c:6579 handle_mm_fault+0x72a/0x7b0 mm/memory.c:5831 do_user_addr_fault+0x7a3/0x13f0 arch/x86/mm/fault.c:1389 handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:rep_movs_alternative+0x33/0x70 arch/x86/lib/copy_user_64.S:58 Code: 40 83 f9 08 73 21 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 <48> 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb RSP: 0018:ffffc9000433fc48 EFLAGS: 00050246 RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000008 RDX: fffff52000867f98 RSI: ffffc9000433fcb8 RDI: 0000000020020278 RBP: 0000000020020278 R08: 0000000000000000 R09: fffff52000867f97 R10: ffffc9000433fcbf R11: 0000000000000000 R12: ffffc9000433fcb8 R13: 0000000020020280 R14: 0000000000000000 R15: 0000000020019680 copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:131 [inline] _inline_copy_to_user include/linux/uaccess.h:181 [inline] _copy_to_user+0xac/0xc0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:209 [inline] msr_read+0x155/0x250 arch/x86/kernel/msr.c:69 vfs_read+0x1d4/0xbd0 fs/read_write.c:474 ksys_read+0x12f/0x260 fs/read_write.c:619 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8c3a3779f9 RSP: 002b:00007f8c39dff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f8c3a505f80 RCX: 00007f8c3a3779f9 RDX: 0000000000018ff8 RSI: 0000000020019680 RDI: 0000000000000004 RBP: 00007f8c3a3e58ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8c3a505f80 R15: 00007fff8cc29b38 Showing all locks held in the system: 1 lock held by pool_workqueue_/3: #0: ffffffff8ddc1438 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:328 1 lock held by khungtaskd/30: #0: ffffffff8ddb5ca0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #0: ffffffff8ddb5ca0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8ddb5ca0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6626 3 locks held by kworker/1:1/46: 2 locks held by getty/4974: #0: ffff88802af7f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211 2 locks held by kworker/1:4/5266: #0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc90003e5fd80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 2 locks held by kworker/0:6/5299: #0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc9000435fd80 (key_gc_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 1 lock held by syz.0.121/5864: #0: ffff888019e822a8 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: remove_inode_hugepages+0x30a/0xee0 fs/hugetlbfs/inode.c:665 3 locks held by syz.4.123/5860: #0: ffff88805ed40ec8 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:690 [inline] #0: ffff88805ed40ec8 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x1e2/0x8f0 mm/memory.c:5999 #1: ffff888019e822a8 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: hugetlb_fault+0x313/0x27c0 mm/hugetlb.c:6451 #2: ffff88807c7ec8e8 (&resv_map->rw_sema){++++}-{3:3}, at: hugetlb_vma_lock_read mm/hugetlb.c:275 [inline] #2: ffff88807c7ec8e8 (&resv_map->rw_sema){++++}-{3:3}, at: hugetlb_vma_lock_read+0x105/0x140 mm/hugetlb.c:266 2 locks held by syz.4.123/5861: #0: ffff88807cb36098 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable include/linux/mmap_lock.h:153 [inline] #0: ffff88807cb36098 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5879 [inline] #0: ffff88807cb36098 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x3a9/0x6a0 mm/memory.c:5930 #1: ffff888019e822a8 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: hugetlb_wp+0x1e16/0x2980 mm/hugetlb.c:6027 2 locks held by syz.3.164/6131: #0: ffff8880249eba98 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable include/linux/mmap_lock.h:153 [inline] #0: ffff8880249eba98 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5879 [inline] #0: ffff8880249eba98 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x3a9/0x6a0 mm/memory.c:5930 #1: ffff888019e822a8 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: hugetlb_fault+0x313/0x27c0 mm/hugetlb.c:6451 3 locks held by syz.3.164/6137: #0: ffff88801a2f8420 (sb_writers#13){.+.+}-{0:0}, at: ksys_fallocate fs/open.c:357 [inline] #0: ffff88801a2f8420 (sb_writers#13){.+.+}-{0:0}, at: __do_sys_fallocate fs/open.c:365 [inline] #0: ffff88801a2f8420 (sb_writers#13){.+.+}-{0:0}, at: __se_sys_fallocate fs/open.c:363 [inline] #0: ffff88801a2f8420 (sb_writers#13){.+.+}-{0:0}, at: __x64_sys_fallocate+0xd5/0x140 fs/open.c:363 #1: ffff8880209d4658 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] #1: ffff8880209d4658 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: hugetlbfs_fallocate+0x2bc/0xfc0 fs/hugetlbfs/inode.c:828 #2: ffff888019e822a8 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: hugetlbfs_fallocate+0x57d/0xfc0 fs/hugetlbfs/inode.c:872 3 locks held by syz-executor/6235: #0: ffff888058b40d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:481 #1: ffff888058b40078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x346/0x1110 net/bluetooth/hci_sync.c:5145 #2: ffffffff8fc85d68 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline] #2: ffffffff8fc85d68 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc4/0x260 net/bluetooth/hci_conn.c:2592 4 locks held by kworker/u8:12/6297: #0: ffff8880166e3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc9000330fd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 #2: ffffffff8fa0be90 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:594 #3: ffffffff8ddc1300 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6c0 kernel/rcu/tree.c:4486 3 locks held by syz-executor/6319: #0: ffff88802d2acd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:481 #1: ffff88802d2ac078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x346/0x1110 net/bluetooth/hci_sync.c:5145 #2: ffffffff8fc85d68 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline] #2: ffffffff8fc85d68 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc4/0x260 net/bluetooth/hci_conn.c:2592 3 locks held by syz-executor/6752: #0: ffff88802c4a0d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:481 #1: ffff88802c4a0078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x346/0x1110 net/bluetooth/hci_sync.c:5145 #2: ffffffff8fc85d68 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline] #2: ffffffff8fc85d68 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc4/0x260 net/bluetooth/hci_conn.c:2592 2 locks held by syz.4.332/6944: #0: ffffffff8fa215e8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline] #0: ffffffff8fa215e8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x250 drivers/net/tun.c:3510 #1: ffffffff8ddc1438 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:328 3 locks held by syz.0.335/6959: #0: ffff88807ed38d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:481 #1: ffff88807ed38078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x346/0x1110 net/bluetooth/hci_sync.c:5145 #2: ffffffff8fc85d68 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline] #2: ffffffff8fc85d68 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc4/0x260 net/bluetooth/hci_conn.c:2592 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc2-syzkaller-00111-gee9a43b7cfe2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xf4e/0x1280 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 53 Comm: kworker/u8:3 Not tainted 6.11.0-rc2-syzkaller-00111-gee9a43b7cfe2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:stack_access_ok+0x100/0x270 arch/x86/kernel/unwind_orc.c:398 Code: 89 da 48 89 ef e8 00 a0 f3 ff 31 ff 41 89 c6 89 c6 e8 d4 9f 4d 00 45 85 f6 74 1e 45 31 f6 e8 87 9d 4d 00 44 89 f0 48 83 c4 10 <5b> 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc e8 6c 9d 4d 00 48 89 RSP: 0018:ffffc90000be6d68 EFLAGS: 00000282 RAX: 0000000000000001 RBX: ffffc90000be6e20 RCX: ffffffff813cdd16 RDX: ffff88801ceb5a00 RSI: ffffffff813cdd79 RDI: 0000000000000005 RBP: ffffc90000be7c98 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90000be6e28 R13: ffffc90000be6e30 R14: 0000000000000001 R15: ffffc90000be8000 FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000562ffa19dff0 CR3: 000000000db7c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline] unwind_next_frame+0x1b94/0x23a0 arch/x86/kernel/unwind_orc.c:648 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2252 [inline] slab_free mm/slub.c:4473 [inline] kfree+0x12a/0x3b0 mm/slub.c:4594 ieee80211_inform_bss+0x76e/0x1100 net/mac80211/scan.c:160 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0x8e2/0x1dc0 net/wireless/scan.c:2335 cfg80211_inform_bss_data+0x205/0x39c0 net/wireless/scan.c:3159 cfg80211_inform_bss_frame_data+0x271/0x7a0 net/wireless/scan.c:3254 ieee80211_bss_info_update+0x311/0xab0 net/mac80211/scan.c:226 ieee80211_rx_bss_info net/mac80211/ibss.c:1100 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1579 [inline] ieee80211_ibss_rx_queued_mgmt+0x1898/0x2f40 net/mac80211/ibss.c:1606 ieee80211_iface_process_skb net/mac80211/iface.c:1588 [inline] ieee80211_iface_work+0xc0b/0xf00 net/mac80211/iface.c:1642 cfg80211_wiphy_work+0x445/0x760 net/wireless/core.c:440 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244