INFO: task syz.0.1165:10629 blocked for more than 143 seconds. Not tainted 6.13.0-rc1-next-20241205-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.1165 state:D stack:22752 pid:10629 tgid:10629 ppid:5829 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5371 [inline] __schedule+0x189f/0x4c80 kernel/sched/core.c:6758 __schedule_loop kernel/sched/core.c:6835 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6850 __bch2_two_state_lock+0x229/0x2c0 fs/bcachefs/two_state_shared_lock.c:7 bch2_two_state_lock fs/bcachefs/two_state_shared_lock.h:55 [inline] bch2_page_fault+0x31f/0x960 fs/bcachefs/fs-io-pagecache.c:592 __do_fault+0x135/0x390 mm/memory.c:4978 do_shared_fault mm/memory.c:5457 [inline] do_fault mm/memory.c:5531 [inline] do_pte_missing mm/memory.c:4048 [inline] handle_pte_fault+0xfcf/0x5ee0 mm/memory.c:5872 __handle_mm_fault mm/memory.c:6015 [inline] handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6183 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x459/0x8b0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f7152f47c3c RSP: 002b:00007ffdeca4d7b8 EFLAGS: 00010206 RAX: 0000000020000080 RBX: 0000000000000004 RCX: 8000000000000013 RDX: 0000000000000013 RSI: 00007f7152a11237 RDI: 0000000020000080 RBP: 00007f7153147ba0 R08: 00007f7152e00000 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000009 R12: 0000000000066b2c R13: 00007f7153146160 R14: 0000000000000032 R15: fffffffffffffffe INFO: task syz.0.1165:10664 blocked for more than 143 seconds. Not tainted 6.13.0-rc1-next-20241205-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.1165 state:D stack:24864 pid:10664 tgid:10629 ppid:5829 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5371 [inline] __schedule+0x189f/0x4c80 kernel/sched/core.c:6758 __schedule_loop kernel/sched/core.c:6835 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6850 __bch2_two_state_lock+0x229/0x2c0 fs/bcachefs/two_state_shared_lock.c:7 bch2_two_state_lock fs/bcachefs/two_state_shared_lock.h:55 [inline] bch2_page_fault+0x31f/0x960 fs/bcachefs/fs-io-pagecache.c:592 __do_fault+0x135/0x390 mm/memory.c:4978 do_read_fault mm/memory.c:5393 [inline] do_fault mm/memory.c:5527 [inline] do_pte_missing mm/memory.c:4048 [inline] handle_pte_fault+0x39eb/0x5ee0 mm/memory.c:5872 __handle_mm_fault mm/memory.c:6015 [inline] handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6183 faultin_page mm/gup.c:1200 [inline] __get_user_pages+0x1b31/0x4370 mm/gup.c:1495 populate_vma_page_range+0x264/0x330 mm/gup.c:1933 __mm_populate+0x27a/0x460 mm/gup.c:2036 mm_populate include/linux/mm.h:3389 [inline] vm_mmap_pgoff+0x303/0x430 mm/util.c:585 ksys_mmap_pgoff+0x4eb/0x720 mm/mmap.c:545 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7152f7fed9 RSP: 002b:00007f7153cc9058 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f7153146080 RCX: 00007f7152f7fed9 RDX: 0000000000000002 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 00007f7152ff3cc8 R08: 000000000000000c R09: 0000000000000000 R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7153146080 R15: 00007ffdeca4d658 Showing all locks held in the system: 1 lock held by pool_workqueue_/3: #0: ffffffff8e93c9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #0: ffffffff8e93c9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976 1 lock held by khungtaskd/30: #0: ffffffff8e9374a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e9374a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e9374a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744 2 locks held by kworker/u8:2/35: 3 locks held by kworker/u8:3/52: #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90000bd7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000bd7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8fcb8188 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 2 locks held by getty/5585: #0: ffff888030f250a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000331b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 5 locks held by kworker/1:5/5880: #0: ffff888021ab5d48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff888021ab5d48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90004047d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90004047d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffff888028ec3190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline] #2: ffff888028ec3190 (&dev->mutex){....}-{4:4}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849 #3: ffff888028ec6510 (&port_dev->status_lock){+.+.}-{4:4}, at: usb_lock_port drivers/usb/core/hub.c:3206 [inline] #3: ffff888028ec6510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5418 [inline] #3: ffff888028ec6510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] #3: ffff888028ec6510 (&port_dev->status_lock){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5821 [inline] #3: ffff888028ec6510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_event+0x25b9/0x5150 drivers/usb/core/hub.c:5903 #4: ffff888028d04368 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5419 [inline] #4: ffff888028d04368 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] #4: ffff888028d04368 (hcd->address0_mutex){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5821 [inline] #4: ffff888028d04368 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_event+0x25f7/0x5150 drivers/usb/core/hub.c:5903 1 lock held by syz.0.1165/10629: #0: ffff88802a5c6a90 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_read include/linux/mm.h:716 [inline] #0: ffff88802a5c6a90 (&vma->vm_lock->lock){++++}-{4:4}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6349 5 locks held by syz.0.1165/10631: #0: ffff888034c0e420 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515 #1: ffff8880576bb638 (&sb->s_type->i_mutex_key#27){++++}-{4:4}, at: inode_lock include/linux/fs.h:830 [inline] #1: ffff8880576bb638 (&sb->s_type->i_mutex_key#27){++++}-{4:4}, at: do_truncate+0x20c/0x310 fs/open.c:63 #2: ffff888046a00a50 (&c->snapshot_create_lock){.+.+}-{4:4}, at: bch2_truncate+0x166/0x2d0 fs/bcachefs/io_misc.c:294 #3: ffff888046a04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline] #3: ffff888046a04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:249 [inline] #3: ffff888046a04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7e4/0xd30 fs/bcachefs/btree_iter.c:3354 #4: ffff888046a266d0 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1191 1 lock held by syz.0.1165/10664: #0: ffff888079bbbde0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:190 [inline] #0: ffff888079bbbde0 (&mm->mmap_lock){++++}-{4:4}, at: __mm_populate+0x1b0/0x460 mm/gup.c:2015 4 locks held by bch-reclaim/loo/10652: #0: ffff888046a4b028 (&j->reclaim_lock){+.+.}-{4:4}, at: bch2_journal_reclaim_thread+0x16d/0x570 fs/bcachefs/journal_reclaim.c:747 #1: ffff888046a04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline] #1: ffff888046a04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:249 [inline] #1: ffff888046a04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7e4/0xd30 fs/bcachefs/btree_iter.c:3354 #2: ffff888046a04720 (&wb->flushing.lock){+.+.}-{4:4}, at: btree_write_buffer_flush_seq+0x1c3f/0x1e10 fs/bcachefs/btree_write_buffer.c:548 #3: ffff888046a266d0 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1191 1 lock held by syz-executor/12137: #0: ffff8880242680e0 (&type->s_umount_key#129){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff8880242680e0 (&type->s_umount_key#129){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff8880242680e0 (&type->s_umount_key#129){+.+.}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 7 locks held by syz-executor/12976: #0: ffff888023c18420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2976 [inline] #0: ffff888023c18420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x225/0xd30 fs/read_write.c:675 #1: ffff88804469e088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #2: ffff888027d60698 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #3: ffffffff8f564488 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 #4: ffff88805c3900e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline] #4: ffff88805c3900e8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline] #4: ffff88805c3900e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293 #5: ffff88805c391250 (&devlink->lock_key#5){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1675 #6: ffffffff8fcb8188 (rtnl_mutex){+.+.}-{4:4}, at: nsim_destroy+0x71/0x5c0 drivers/net/netdevsim/netdev.c:816 2 locks held by syz.5.1630/13012: #0: ffffffff8e7f2b68 (sched_core_mutex){+.+.}-{4:4}, at: sched_core_get+0x51/0x180 kernel/sched/core.c:454 #1: ffffffff8e93c9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #1: ffffffff8e93c9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc1-next-20241205-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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:234 [inline] watchdog+0xff6/0x1040 kernel/hung_task.c:397 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 13045 Comm: syz.5.1630 Not tainted 6.13.0-rc1-next-20241205-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:rcu_is_watching+0x70/0xb0 kernel/rcu/tree.c:739 Code: c3 d8 7c 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 22 8b 03 65 ff 0d 11 e2 7e 7e 74 10 83 e0 04 c1 e8 02 5b <41> 5e 41 5f c3 cc cc cc cc e8 82 63 85 ff eb e9 89 d9 80 e1 07 80 RSP: 0018:ffffc900045ef308 EFLAGS: 00000002 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff817a92b4 RDX: 0000000000000000 RSI: ffffffff8c5fbe60 RDI: ffffffff8c5fbe20 RBP: ffffc900045ef478 R08: ffffffff9019d9b7 R09: 1ffffffff2033b36 R10: dffffc0000000000 R11: fffffbfff2033b37 R12: 1ffff920008bde6c R13: dffffc0000000000 R14: ffffffff8e2eba98 R15: dffffc0000000000 FS: 00007fe2839a86c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002001a000 CR3: 000000004279e000 CR4: 00000000003526f0 DR0: fffffffffffffffc DR1: 0000000080000000 DR2: 0008000000000001 DR3: fffffffffffffffc DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0xe3/0x550 kernel/locking/lockdep.c:5820 do_write_seqcount_begin_nested include/linux/seqlock.h:476 [inline] do_write_seqcount_begin include/linux/seqlock.h:502 [inline] psi_group_change+0x1b9/0x1190 kernel/sched/psi.c:792 psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987 psi_sched_switch kernel/sched/stats.h:216 [inline] __schedule+0x226e/0x4c80 kernel/sched/core.c:6753 __schedule_loop kernel/sched/core.c:6835 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6850 schedule_timeout+0xb0/0x290 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x355/0x620 kernel/sched/completion.c:148 rdmsr_safe_on_cpu+0x16c/0x310 arch/x86/lib/msr-smp.c:181 msr_read+0x15d/0x260 arch/x86/kernel/msr.c:66 vfs_read+0x1fc/0xb70 fs/read_write.c:563 ksys_read+0x18f/0x2b0 fs/read_write.c:708 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe282b7fed9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe2839a8058 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fe282d46080 RCX: 00007fe282b7fed9 RDX: 0000000000018ff8 RSI: 0000000020019680 RDI: 0000000000000005 RBP: 00007fe282bf3cc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe282d46080 R15: 00007ffd7bd00718