INFO: task syz.1.1165:11892 blocked for more than 430 seconds. Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.1165 state:D stack:0 pid:11892 tgid:11888 ppid:9116 flags:0x00000006 Call Trace: [] context_switch kernel/sched/core.c:5315 [inline] [] __schedule+0xd5a/0x3886 kernel/sched/core.c:6675 [] __schedule_loop kernel/sched/core.c:6752 [inline] [] schedule+0xc4/0x324 kernel/sched/core.c:6767 [] io_schedule+0x78/0xd4 kernel/sched/core.c:7552 [] folio_wait_bit_common+0x398/0x944 mm/filemap.c:1309 [] __folio_lock mm/filemap.c:1647 [inline] [] folio_lock include/linux/pagemap.h:1148 [inline] [] folio_lock include/linux/pagemap.h:1144 [inline] [] __filemap_get_folio+0x470/0x866 mm/filemap.c:1900 [] truncate_inode_pages_range+0x344/0xd78 mm/truncate.c:351 [] truncate_inode_pages+0x22/0x2e mm/truncate.c:423 [] kill_bdev block/bdev.c:91 [inline] [] blkdev_flush_mapping+0xf8/0x28a block/bdev.c:671 [] blkdev_put_whole+0xce/0xee block/bdev.c:678 [] bdev_release+0x3fe/0x600 block/bdev.c:1103 [] blkdev_release+0x1a/0x26 block/fops.c:639 [] __fput+0x378/0x9e6 fs/file_table.c:431 [] ____fput+0x1c/0x26 fs/file_table.c:459 [] task_work_run+0x16a/0x25e kernel/task_work.c:228 [] get_signal+0x1aa/0x23b0 kernel/signal.c:2690 [] arch_do_signal_or_restart+0x8d6/0x1190 arch/riscv/kernel/signal.c:437 [] 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+0x2a6/0x31e kernel/entry/common.c:218 [] do_trap_ecall_u+0x86/0x216 arch/riscv/kernel/traps.c:345 [] _new_vmalloc_restore_context_a0+0xc2/0xce Showing all locks held in the system: 1 lock held by khungtaskd/37: #0: ffffffff87fcc100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x68/0x2d6 kernel/locking/lockdep.c:6716 1 lock held by syslogd/2994: 2 locks held by getty/3148: #0: ff6000001c9260a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340 #1: ff2000000008b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xd7c/0x129a drivers/tty/n_tty.c:2211 4 locks held by kworker/u9:2/7510: #0: ff6000006ec2dd18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:593 [inline] #0: ff6000006ec2dd18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1505 [inline] #0: ff6000006ec2dd18 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1804 [inline] #0: ff6000006ec2dd18 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x280/0x3886 kernel/sched/core.c:6575 #1: ff6000006ec19648 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x23e/0x732 kernel/sched/psi.c:989 #2: ff6000006ec1b3d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x7e/0x1fc kernel/time/timer.c:1051 #3: ffffffff90a68aa8 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x16a/0x378 lib/debugobjects.c:708 1 lock held by syz.1.1165/11892: #0: ff60000019dfe4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x12c/0x600 block/bdev.c:1087 2 locks held by kworker/0:4/12331: 1 lock held by syz.0.1296/12626: #0: ff6000001961d688 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline] #0: ff6000001961d688 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x158/0x310 mm/util.c:586 2 locks held by syz.0.1296/12627: 1 lock held by syz.1.1298/12631: #0: ff6000001aaa3488 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline] #0: ff6000001aaa3488 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x158/0x310 mm/util.c:586 1 lock held by syz.1.1298/12632: ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #0 Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130 [] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:136 [] __dump_stack lib/dump_stack.c:94 [inline] [] dump_stack_lvl+0x122/0x196 lib/dump_stack.c:120 [] dump_stack+0x1c/0x24 lib/dump_stack.c:129 [] nmi_cpu_backtrace+0x39c/0x39e lib/nmi_backtrace.c:113 [] nmi_trigger_cpumask_backtrace+0x2b6/0x456 lib/nmi_backtrace.c:62 [] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:347 [] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] [] watchdog+0xcfa/0x1178 kernel/hung_task.c:379 [] kthread+0x28c/0x3a6 kernel/kthread.c:389 [] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 7510 Comm: kworker/u9:2 Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #0 Hardware name: riscv-virtio,qemu (DT) Workqueue: events_unbound toggle_allocation_gate epc : lock_release+0x5c4/0xb6c kernel/locking/lockdep.c:5833 ra : lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline] ra : lock_release+0x526/0xb6c kernel/locking/lockdep.c:5848 epc : ffffffff802486cc ra : ffffffff8024862e sp : ff20000001ab7640 gp : ffffffff897bea80 tp : ff6000001cfc8000 t0 : ff6000001cfc8b20 t1 : ffe3ffff00356ef2 t2 : 0000000000000010 s0 : ff20000001ab7760 s1 : 1fe4000000356ecc a0 : ffffffff90b60b00 a1 : 0000000000000000 a2 : 0000000000000000 a3 : ffffffff814a8fc2 a4 : 0000000000000000 a5 : 0000000000000000 a6 : 0000000000000003 a7 : ffffffffff000000 s2 : ffffffff90b60b00 s3 : ff6000006ec19708 s4 : ffffffff86258708 s5 : ffffffff90b60b00 s6 : 0000000000000002 s7 : ff20000001ab76e0 s8 : 0000000000000005 s9 : ff6000001cfc8bc0 s10: ff6000001cfc8000 s11: 1fec0000039f9163 t3 : 1fec0000039f9163 t4 : ffe3ffff00356ef2 t5 : ffe3ffff00356ef3 t6 : 1fec0000039f917c status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001 [] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline] [] lock_release+0x5c4/0xb6c kernel/locking/lockdep.c:5849 [] __mutex_unlock_slowpath+0xa4/0x58c kernel/locking/mutex.c:912 [] mutex_unlock+0xe/0x16 kernel/locking/mutex.c:548 [] arch_jump_label_transform_queue+0xe6/0x220 arch/riscv/kernel/jump_label.c:41 [] __jump_label_update+0x11c/0x3ee kernel/jump_label.c:513 [] jump_label_update+0x1e6/0x422 kernel/jump_label.c:920 [] static_key_disable_cpuslocked+0x190/0x200 kernel/jump_label.c:240 [] static_key_disable+0x22/0x34 kernel/jump_label.c:248 [] toggle_allocation_gate mm/kfence/core.c:854 [inline] [] toggle_allocation_gate+0x164/0x250 mm/kfence/core.c:841 [] process_one_work+0x956/0x1dae kernel/workqueue.c:3229 [] process_scheduled_works kernel/workqueue.c:3310 [inline] [] worker_thread+0x5be/0xdc6 kernel/workqueue.c:3391 [] kthread+0x28c/0x3a6 kernel/kthread.c:389 [] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326