INFO: task syz.2.619:7647 blocked for more than 143 seconds. Not tainted 6.10.0-rc6-next-20240703-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.619 state:D stack:24672 pid:7647 tgid:7647 ppid:6847 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5248 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6600 __schedule_loop kernel/sched/core.c:6677 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6692 io_schedule+0x8d/0x110 kernel/sched/core.c:7477 folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1307 folio_lock include/linux/pagemap.h:1050 [inline] remove_inode_single_folio fs/hugetlbfs/inode.c:603 [inline] remove_inode_hugepages+0x508/0x1520 fs/hugetlbfs/inode.c:669 hugetlbfs_evict_inode+0x23/0x70 fs/hugetlbfs/inode.c:689 evict+0x2a8/0x630 fs/inode.c:669 __dentry_kill+0x20d/0x630 fs/dcache.c:603 dput+0x19f/0x2b0 fs/dcache.c:845 __fput+0x5f8/0x8a0 fs/file_table.c:430 task_work_run+0x24f/0x310 kernel/task_work.c:204 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f54b3f75bd9 RSP: 002b:00007fff40e32868 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 000000000003ebf1 RCX: 00007f54b3f75bd9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: ffffffffffffffff R08: 0000000000000001 R09: 0000001e40e32b9f R10: 00007f54b3e00000 R11: 0000000000000246 R12: 00007f54b4103f6c R13: 0000000000000032 R14: 00007f54b4105a60 R15: 00007f54b4103f60 Showing all locks held in the system: 4 locks held by kworker/u8:1/12: 1 lock held by khungtaskd/30: #0: ffffffff8e335860 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:333 [inline] #0: ffffffff8e335860 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:845 [inline] #0: ffffffff8e335860 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6704 3 locks held by kworker/u8:2/35: #0: ffff888029aaf148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline] #0: ffff888029aaf148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305 #1: ffffc90000ab7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline] #1: ffffc90000ab7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305 #2: ffffffff8f5ff788 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193 3 locks held by kworker/0:2/929: #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline] #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305 #1: ffffc90003fafd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline] #1: ffffc90003fafd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305 #2: ffffffff8f5ff788 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 2 locks held by getty/4856: #0: ffff88802a73b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 5 locks held by kworker/1:3/5099: #0: ffff88801513d948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline] #0: ffff88801513d948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305 #1: ffffc900038a7d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline] #1: ffffc900038a7d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305 #2: ffff8880241e2190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #2: ffff8880241e2190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849 #3: ffff8880241e5518 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3206 [inline] #3: ffff8880241e5518 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5418 [inline] #3: ffff8880241e5518 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] #3: ffff8880241e5518 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5821 [inline] #3: ffff8880241e5518 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x25b6/0x5150 drivers/usb/core/hub.c:5903 #4: ffff8880240e4f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5419 [inline] #4: ffff8880240e4f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] #4: ffff8880240e4f68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5821 [inline] #4: ffff8880240e4f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x25f4/0x5150 drivers/usb/core/hub.c:5903 1 lock held by syz.2.619/7647: #0: ffff88801b2ba2a8 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: remove_inode_hugepages+0x38e/0x1520 fs/hugetlbfs/inode.c:664 1 lock held by syz-executor/9326: #0: ffffffff8f5ff788 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:149 [inline] #0: ffffffff8f5ff788 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725 1 lock held by syz.3.1026/9375: #0: ffff88802e9c4418 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:106 [inline] #0: ffff88802e9c4418 (&mm->mmap_lock){++++}-{3:3}, at: userfaultfd_release+0x206/0x900 fs/userfaultfd.c:892 1 lock held by syz.3.1026/9376: #0: ffff88802e9c4418 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:144 [inline] #0: ffff88802e9c4418 (&mm->mmap_lock){++++}-{3:3}, at: exit_mm+0xd4/0x310 kernel/exit.c:547 1 lock held by syz.3.1026/9378: #0: ffff88802e9c4418 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:144 [inline] #0: ffff88802e9c4418 (&mm->mmap_lock){++++}-{3:3}, at: exit_mm+0xd4/0x310 kernel/exit.c:547 2 locks held by syz.3.1026/9383: #0: ffff88802e9c4418 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:144 [inline] #0: ffff88802e9c4418 (&mm->mmap_lock){++++}-{3:3}, at: __mm_populate+0x1b0/0x460 mm/gup.c:2014 #1: ffff88801b2ba2a8 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: hugetlb_fault+0x575/0x3780 mm/hugetlb.c:6447 1 lock held by syz-executor/9396: #0: ffffffff8f5ff788 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:149 [inline] #0: ffffffff8f5ff788 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725 1 lock held by syz-executor/9398: #0: ffffffff8f5ff788 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:149 [inline] #0: ffffffff8f5ff788 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725 2 locks held by syz-executor/9422: #0: ffffffff8f5f2c10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5ff788 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1158 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc6-next-20240703-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xfee/0x1030 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 63 Comm: kworker/u8:4 Not tainted 6.10.0-rc6-next-20240703-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:hlock_class kernel/locking/lockdep.c:223 [inline] RIP: 0010:mark_lock+0x61/0x360 kernel/locking/lockdep.c:4700 Code: 85 94 02 00 00 31 ed f6 43 02 03 40 0f 94 c5 83 f5 09 eb 0b 89 d5 83 fa 20 0f 83 e3 02 00 00 41 be 01 00 00 00 89 e9 41 d3 e6 <49> 8d 5f 20 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 3a 02 RSP: 0018:ffffc900015e7638 EFLAGS: 00000002 RAX: 0000000000050004 RBX: ffff88801671c730 RCX: 0000000000000007 RDX: 0000000000000007 RSI: ffff88801671c730 RDI: ffff88801671bc00 RBP: 0000000000000007 R08: ffffffff9301079f R09: 1ffffffff26020f3 R10: dffffc0000000000 R11: fffffbfff26020f4 R12: ffff88801671c750 R13: dffffc0000000000 R14: 0000000000000080 R15: ffff88801671c730 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005630d9de2f20 CR3: 000000000e132000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_held_locks kernel/locking/lockdep.c:4318 [inline] __trace_hardirqs_on_caller kernel/locking/lockdep.c:4344 [inline] lockdep_hardirqs_on_prepare+0x3a5/0x780 kernel/locking/lockdep.c:4403 trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61 __text_poke+0x9bf/0xd30 arch/x86/kernel/alternative.c:1959 text_poke arch/x86/kernel/alternative.c:1984 [inline] text_poke_bp_batch+0x59c/0xb30 arch/x86/kernel/alternative.c:2317 text_poke_flush arch/x86/kernel/alternative.c:2486 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2493 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_disable_cpuslocked+0xce/0x1c0 kernel/jump_label.c:240 static_key_disable+0x1a/0x20 kernel/jump_label.c:248 toggle_allocation_gate+0x1b8/0x250 mm/kfence/core.c:838 process_one_work kernel/workqueue.c:3224 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3305 worker_thread+0x86d/0xd40 kernel/workqueue.c:3383 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244