syzkaller login: [ 154.970299][ T32] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32 [ 155.057019][ T32] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 155.097626][ T32] CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 155.138982][ T32] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 155.178980][ T32] Workqueue: writeback wb_workfn (flush-8:0) [ 155.212441][ T32] Call Trace: [ 155.219738][ T32] dump_stack+0x18f/0x20d [ 155.239028][ T32] check_preemption_disabled+0x20d/0x220 [ 155.259614][ T32] ext4_mb_new_blocks+0xa4d/0x3b70 [ 155.279079][ T32] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 155.299139][ T32] ? ext4_ext_search_right+0x2ca/0xb20 [ 155.329518][ T32] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 155.338950][ T32] ext4_ext_map_blocks+0x201b/0x33e0 [ 155.359520][ T32] ? ext4_ext_release+0x10/0x10 [ 155.379136][ T32] ? mark_held_locks+0x9f/0xe0 [ 155.399019][ T32] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 155.429211][ T32] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 155.439142][ T32] ext4_map_blocks+0x4cb/0x1640 [ 155.459040][ T32] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 155.478899][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 155.499199][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 155.518974][ T32] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 155.539292][ T32] ext4_writepages+0x1a7b/0x33c0 [ 155.539292][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 155.558911][ T32] ? __lock_acquire+0x2224/0x48b0 [ 155.578969][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 155.578969][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 155.598905][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 155.618950][ T32] ? do_writepages+0xfa/0x2a0 [ 155.639465][ T32] do_writepages+0xfa/0x2a0 [ 155.658982][ T32] ? page_writeback_cpu_online+0x10/0x10 [ 155.678870][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 155.698937][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 155.719074][ T32] __writeback_single_inode+0x12a/0x13d0 [ 155.749438][ T32] ? _raw_spin_unlock+0x24/0x40 [ 155.759012][ T32] ? wbc_attach_and_unlock_inode+0x545/0x9c0 [ 155.779474][ T32] writeback_sb_inodes+0x515/0xdc0 [ 155.799421][ T32] ? __writeback_single_inode+0x13d0/0x13d0 [ 155.838988][ T32] __writeback_inodes_wb+0xc3/0x250 [ 155.859082][ T32] wb_writeback+0x8db/0xd50 [ 155.879029][ T32] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 155.899239][ T32] ? cpumask_next+0x3c/0x40 [ 155.919832][ T32] ? get_nr_dirty_inodes+0xd6/0x130 [ 155.959657][ T32] wb_workfn+0x9bc/0x1090 [ 155.979112][ T32] ? inode_wait_for_writeback+0x30/0x30 [ 155.999229][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 156.039257][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 156.069489][ T32] process_one_work+0x965/0x1690 [ 156.089466][ T32] ? lock_release+0x800/0x800 [ 156.109098][ T32] ? pwq_dec_nr_in_flight+0x310/0x310 [ 156.129365][ T32] ? rwlock_bug.part.0+0x90/0x90 [ 156.149233][ T32] worker_thread+0x96/0xe10 [ 156.159079][ T32] ? process_one_work+0x1690/0x1690 [ 156.179111][ T32] kthread+0x3b5/0x4a0 [ 156.199800][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 156.208995][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 156.218870][ T32] ret_from_fork+0x1f/0x30 [ 161.260872][ T32] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32 [ 161.299787][ T32] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 161.313285][ T32] CPU: 2 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 161.323131][ T32] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 161.323131][ T32] Workqueue: writeback wb_workfn (flush-8:0) [ 161.323131][ T32] Call Trace: [ 161.323131][ T32] dump_stack+0x18f/0x20d [ 161.323131][ T32] check_preemption_disabled+0x20d/0x220 [ 161.323131][ T32] ext4_mb_new_blocks+0xa4d/0x3b70 [ 161.323131][ T32] ? ext4_find_extent+0x81a/0xad0 [ 161.323131][ T32] ? ext4_ext_search_right+0x2ca/0xb20 [ 161.323131][ T32] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 161.323131][ T32] ext4_ext_map_blocks+0x201b/0x33e0 [ 161.323131][ T32] ? ext4_ext_release+0x10/0x10 [ 161.323131][ T32] ? down_write_killable+0x170/0x170 [ 161.323131][ T32] ? ext4_es_lookup_extent+0x41d/0xd10 [ 161.323131][ T32] ext4_map_blocks+0x4cb/0x1640 [ 161.323131][ T32] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 161.323131][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 161.323131][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 161.323131][ T32] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 161.323131][ T32] ext4_writepages+0x1a7b/0x33c0 [ 161.323131][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 161.323131][ T32] ? __lock_acquire+0x2224/0x48b0 [ 161.323131][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 161.323131][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 161.323131][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 161.323131][ T32] ? do_writepages+0xfa/0x2a0 [ 161.323131][ T32] do_writepages+0xfa/0x2a0 [ 161.323131][ T32] ? page_writeback_cpu_online+0x10/0x10 [ 161.323131][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 161.323131][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 161.323131][ T32] __writeback_single_inode+0x12a/0x13d0 [ 161.323131][ T32] ? _raw_spin_unlock+0x24/0x40 [ 161.323131][ T32] ? wbc_attach_and_unlock_inode+0x545/0x9c0 [ 161.323131][ T32] writeback_sb_inodes+0x515/0xdc0 [ 161.323131][ T32] ? __writeback_single_inode+0x13d0/0x13d0 [ 161.323131][ T32] __writeback_inodes_wb+0xc3/0x250 [ 161.323131][ T32] wb_writeback+0x8db/0xd50 [ 161.323131][ T32] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 161.323131][ T32] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 161.323131][ T32] ? cpumask_next+0x3c/0x40 [ 161.323131][ T32] ? get_nr_dirty_inodes+0xd6/0x130 [ 161.323131][ T32] wb_workfn+0xab3/0x1090 [ 161.323131][ T32] ? inode_wait_for_writeback+0x30/0x30 [ 161.323131][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 161.323131][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 161.323131][ T32] process_one_work+0x965/0x1690 [ 161.323131][ T32] ? lock_release+0x800/0x800 [ 161.323131][ T32] ? pwq_dec_nr_in_flight+0x310/0x310 [ 161.323131][ T32] ? rwlock_bug.part.0+0x90/0x90 [ 161.323131][ T32] worker_thread+0x96/0xe10 [ 161.323131][ T32] ? process_one_work+0x1690/0x1690 [ 161.323131][ T32] kthread+0x3b5/0x4a0 [ 161.323131][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 161.323131][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 161.323131][ T32] ret_from_fork+0x1f/0x30 [ 161.933736][ T32] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32 [ 161.948995][ T32] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 161.958620][ T32] CPU: 2 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 161.958821][ T32] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 161.958821][ T32] Workqueue: writeback wb_workfn (flush-8:0) [ 161.958821][ T32] Call Trace: [ 161.958821][ T32] dump_stack+0x18f/0x20d [ 161.958821][ T32] check_preemption_disabled+0x20d/0x220 [ 161.958821][ T32] ext4_mb_new_blocks+0xa4d/0x3b70 [ 161.958821][ T32] ? ext4_find_extent+0x81a/0xad0 [ 161.958821][ T32] ? ext4_ext_search_right+0x2ca/0xb20 [ 161.958821][ T32] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 161.958821][ T32] ext4_ext_map_blocks+0x201b/0x33e0 [ 161.958821][ T32] ? ext4_ext_release+0x10/0x10 [ 161.958821][ T32] ? down_write_killable+0x170/0x170 [ 161.958821][ T32] ? ext4_es_lookup_extent+0x41d/0xd10 [ 161.958821][ T32] ext4_map_blocks+0x4cb/0x1640 [ 162.159418][ T32] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 162.159418][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 162.159418][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 162.159418][ T32] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 162.220435][ T32] ext4_writepages+0x1a7b/0x33c0 [ 162.229214][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 162.229214][ T32] ? __lock_acquire+0x2224/0x48b0 [ 162.229214][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 162.229214][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 162.229214][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 162.229214][ T32] ? do_writepages+0xfa/0x2a0 [ 162.229214][ T32] do_writepages+0xfa/0x2a0 [ 162.229214][ T32] ? page_writeback_cpu_online+0x10/0x10 [ 162.229214][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 162.229214][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 162.229214][ T32] __writeback_single_inode+0x12a/0x13d0 [ 162.229214][ T32] ? _raw_spin_unlock+0x24/0x40 [ 162.229214][ T32] ? wbc_attach_and_unlock_inode+0x545/0x9c0 [ 162.229214][ T32] writeback_sb_inodes+0x515/0xdc0 [ 162.229214][ T32] ? __writeback_single_inode+0x13d0/0x13d0 [ 162.229214][ T32] __writeback_inodes_wb+0xc3/0x250 [ 162.229214][ T32] wb_writeback+0x8db/0xd50 [ 162.229214][ T32] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 162.229214][ T32] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 162.229214][ T32] ? cpumask_next+0x3c/0x40 [ 162.229214][ T32] ? get_nr_dirty_inodes+0xd6/0x130 [ 162.229214][ T32] wb_workfn+0xab3/0x1090 [ 162.229214][ T32] ? inode_wait_for_writeback+0x30/0x30 [ 162.229214][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 162.229214][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 162.229214][ T32] process_one_work+0x965/0x1690 [ 162.229214][ T32] ? lock_release+0x800/0x800 [ 162.229214][ T32] ? pwq_dec_nr_in_flight+0x310/0x310 [ 162.229214][ T32] ? rwlock_bug.part.0+0x90/0x90 [ 162.229214][ T32] worker_thread+0x96/0xe10 [ 162.229214][ T32] ? process_one_work+0x1690/0x1690 [ 162.229214][ T32] kthread+0x3b5/0x4a0 [ 162.229214][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 162.229214][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 162.229214][ T32] ret_from_fork+0x1f/0x30 [ 162.664784][ T32] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32 [ 162.687740][ T32] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 162.698251][ T32] CPU: 2 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 162.708143][ T32] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 162.738893][ T32] Workqueue: writeback wb_workfn (flush-8:0) [ 162.738893][ T32] Call Trace: [ 162.738893][ T32] dump_stack+0x18f/0x20d [ 162.759080][ T32] check_preemption_disabled+0x20d/0x220 [ 162.759080][ T32] ext4_mb_new_blocks+0xa4d/0x3b70 [ 162.779040][ T32] ? ext4_find_extent+0x81a/0xad0 [ 162.779040][ T32] ? ext4_ext_search_right+0x2ca/0xb20 [ 162.819198][ T32] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 162.819198][ T32] ext4_ext_map_blocks+0x201b/0x33e0 [ 162.839342][ T32] ? ext4_ext_release+0x10/0x10 [ 162.859072][ T32] ? down_write_killable+0x170/0x170 [ 162.859072][ T32] ? ext4_es_lookup_extent+0x41d/0xd10 [ 162.878998][ T32] ext4_map_blocks+0x4cb/0x1640 [ 162.878998][ T32] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 162.878998][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 162.878998][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 162.909059][ T32] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 162.918982][ T32] ext4_writepages+0x1a7b/0x33c0 [ 162.918982][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 162.918982][ T32] ? __lock_acquire+0x2224/0x48b0 [ 162.959021][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 162.959021][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 162.978974][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 162.978974][ T32] ? do_writepages+0xfa/0x2a0 [ 162.999029][ T32] do_writepages+0xfa/0x2a0 [ 162.999029][ T32] ? page_writeback_cpu_online+0x10/0x10 [ 163.018971][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 163.018971][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 163.049020][ T32] __writeback_single_inode+0x12a/0x13d0 [ 163.059098][ T32] ? _raw_spin_unlock+0x24/0x40 [ 163.059098][ T32] ? wbc_attach_and_unlock_inode+0x545/0x9c0 [ 163.059098][ T32] writeback_sb_inodes+0x515/0xdc0 [ 163.088918][ T32] ? __writeback_single_inode+0x13d0/0x13d0 [ 163.088918][ T32] __writeback_inodes_wb+0xc3/0x250 [ 163.108948][ T32] wb_writeback+0x8db/0xd50 [ 163.108948][ T32] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 163.129028][ T32] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 163.138887][ T32] ? cpumask_next+0x3c/0x40 [ 163.138887][ T32] ? get_nr_dirty_inodes+0xd6/0x130 [ 163.158881][ T32] wb_workfn+0xab3/0x1090 [ 163.168875][ T32] ? inode_wait_for_writeback+0x30/0x30 [ 163.168875][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 163.189064][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 163.198977][ T32] process_one_work+0x965/0x1690 [ 163.208875][ T32] ? lock_release+0x800/0x800 [ 163.218848][ T32] ? pwq_dec_nr_in_flight+0x310/0x310 [ 163.238998][ T32] ? rwlock_bug.part.0+0x90/0x90 [ 163.238998][ T32] worker_thread+0x96/0xe10 [ 163.248920][ T32] ? process_one_work+0x1690/0x1690 [ 163.269031][ T32] kthread+0x3b5/0x4a0 [ 163.269031][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 163.288914][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 163.299003][ T32] ret_from_fork+0x1f/0x30 [ 163.316160][ T32] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32 [ 163.339149][ T32] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 163.348625][ T32] CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 163.348809][ T32] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 163.348809][ T32] Workqueue: writeback wb_workfn (flush-8:0) [ 163.348809][ T32] Call Trace: [ 163.348809][ T32] dump_stack+0x18f/0x20d [ 163.348809][ T32] check_preemption_disabled+0x20d/0x220 [ 163.348809][ T32] ext4_mb_new_blocks+0xa4d/0x3b70 [ 163.348809][ T32] ? ext4_find_extent+0x81a/0xad0 [ 163.348809][ T32] ? ext4_ext_search_right+0x2ca/0xb20 [ 163.348809][ T32] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 163.348809][ T32] ext4_ext_map_blocks+0x201b/0x33e0 [ 163.348809][ T32] ? ext4_ext_release+0x10/0x10 [ 163.348809][ T32] ? down_write_killable+0x170/0x170 [ 163.348809][ T32] ? ext4_es_lookup_extent+0x41d/0xd10 [ 163.348809][ T32] ext4_map_blocks+0x4cb/0x1640 [ 163.348809][ T32] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 163.348809][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 163.348809][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 163.348809][ T32] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 163.348809][ T32] ext4_writepages+0x1a7b/0x33c0 [ 163.348809][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 163.348809][ T32] ? __lock_acquire+0x2224/0x48b0 [ 163.348809][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 163.348809][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 163.348809][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 163.348809][ T32] ? do_writepages+0xfa/0x2a0 [ 163.348809][ T32] do_writepages+0xfa/0x2a0 [ 163.348809][ T32] ? page_writeback_cpu_online+0x10/0x10 [ 163.348809][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 163.348809][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 163.348809][ T32] __writeback_single_inode+0x12a/0x13d0 [ 163.348809][ T32] ? _raw_spin_unlock+0x24/0x40 [ 163.348809][ T32] ? wbc_attach_and_unlock_inode+0x545/0x9c0 [ 163.348809][ T32] writeback_sb_inodes+0x515/0xdc0 [ 163.348809][ T32] ? __writeback_single_inode+0x13d0/0x13d0 [ 163.348809][ T32] __writeback_inodes_wb+0xc3/0x250 [ 163.348809][ T32] wb_writeback+0x8db/0xd50 [ 163.348809][ T32] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 163.348809][ T32] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 163.348809][ T32] ? cpumask_next+0x3c/0x40 [ 163.348809][ T32] ? get_nr_dirty_inodes+0xd6/0x130 [ 163.348809][ T32] wb_workfn+0xab3/0x1090 [ 163.348809][ T32] ? inode_wait_for_writeback+0x30/0x30 [ 163.348809][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 163.348809][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 163.348809][ T32] process_one_work+0x965/0x1690 [ 163.348809][ T32] ? lock_release+0x800/0x800 [ 163.348809][ T32] ? pwq_dec_nr_in_flight+0x310/0x310 [ 163.348809][ T32] ? rwlock_bug.part.0+0x90/0x90 [ 163.348809][ T32] worker_thread+0x96/0xe10 [ 163.348809][ T32] ? process_one_work+0x1690/0x1690 [ 163.348809][ T32] kthread+0x3b5/0x4a0 [ 163.348809][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 163.348809][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 163.348809][ T32] ret_from_fork+0x1f/0x30 [ 164.006683][ T32] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32 [ 164.022758][ T32] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 164.032736][ T32] CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 164.048829][ T32] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 164.060222][ T32] Workqueue: writeback wb_workfn (flush-8:0) [ 164.069113][ T32] Call Trace: [ 164.079186][ T32] dump_stack+0x18f/0x20d [ 164.079186][ T32] check_preemption_disabled+0x20d/0x220 [ 164.079186][ T32] ext4_mb_new_blocks+0xa4d/0x3b70 [ 164.099024][ T32] ? ext4_find_extent+0x81a/0xad0 [ 164.099024][ T32] ? ext4_ext_search_right+0x2ca/0xb20 [ 164.099024][ T32] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 164.118952][ T32] ext4_ext_map_blocks+0x201b/0x33e0 [ 164.118952][ T32] ? ext4_ext_release+0x10/0x10 [ 164.118952][ T32] ? down_write_killable+0x170/0x170 [ 164.118952][ T32] ? ext4_es_lookup_extent+0x41d/0xd10 [ 164.139052][ T32] ext4_map_blocks+0x4cb/0x1640 [ 164.139052][ T32] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 164.139052][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 164.159005][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 164.159005][ T32] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 164.159005][ T32] ext4_writepages+0x1a7b/0x33c0 [ 164.179002][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 164.179002][ T32] ? __lock_acquire+0x2224/0x48b0 [ 164.179002][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 164.199083][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 164.208867][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 164.208867][ T32] ? do_writepages+0xfa/0x2a0 [ 164.218940][ T32] do_writepages+0xfa/0x2a0 [ 164.218940][ T32] ? page_writeback_cpu_online+0x10/0x10 [ 164.218940][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 164.238907][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 164.238907][ T32] __writeback_single_inode+0x12a/0x13d0 [ 164.238907][ T32] ? _raw_spin_unlock+0x24/0x40 [ 164.258923][ T32] ? wbc_attach_and_unlock_inode+0x545/0x9c0 [ 164.258923][ T32] writeback_sb_inodes+0x515/0xdc0 [ 164.258923][ T32] ? __writeback_single_inode+0x13d0/0x13d0 [ 164.278913][ T32] __writeback_inodes_wb+0xc3/0x250 [ 164.278913][ T32] wb_writeback+0x8db/0xd50 [ 164.278913][ T32] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 164.298960][ T32] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 164.298960][ T32] ? cpumask_next+0x3c/0x40 [ 164.298960][ T32] ? get_nr_dirty_inodes+0xd6/0x130 [ 164.298960][ T32] wb_workfn+0xab3/0x1090 [ 164.328885][ T32] ? inode_wait_for_writeback+0x30/0x30 [ 164.339229][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 164.359201][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 164.359201][ T32] process_one_work+0x965/0x1690 [ 164.359201][ T32] ? lock_release+0x800/0x800 [ 164.389044][ T32] ? pwq_dec_nr_in_flight+0x310/0x310 [ 164.398989][ T32] ? rwlock_bug.part.0+0x90/0x90 [ 164.398989][ T32] worker_thread+0x96/0xe10 [ 164.419065][ T32] ? process_one_work+0x1690/0x1690 [ 164.419065][ T32] kthread+0x3b5/0x4a0 [ 164.419065][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 164.448924][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 164.458931][ T32] ret_from_fork+0x1f/0x30 [ 164.477278][ T32] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32 [ 164.492231][ T32] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 164.501498][ T32] CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 164.511284][ T32] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 164.511284][ T32] Workqueue: writeback wb_workfn (flush-8:0) [ 164.548930][ T32] Call Trace: [ 164.548930][ T32] dump_stack+0x18f/0x20d [ 164.548930][ T32] check_preemption_disabled+0x20d/0x220 [ 164.548930][ T32] ext4_mb_new_blocks+0xa4d/0x3b70 [ 164.589219][ T32] ? ext4_find_extent+0x81a/0xad0 [ 164.609318][ T32] ? ext4_ext_search_right+0x2ca/0xb20 [ 164.609318][ T32] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 164.629177][ T32] ext4_ext_map_blocks+0x201b/0x33e0 [ 164.669155][ T32] ? ext4_ext_release+0x10/0x10 [ 164.669155][ T32] ? down_write_killable+0x170/0x170 [ 164.699052][ T32] ? ext4_es_lookup_extent+0x41d/0xd10 [ 164.699052][ T32] ext4_map_blocks+0x4cb/0x1640 [ 164.699052][ T32] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 164.749501][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 164.779231][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 164.779231][ T32] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 164.779231][ T32] ext4_writepages+0x1a7b/0x33c0 [ 164.779231][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 164.779231][ T32] ? __lock_acquire+0x2224/0x48b0 [ 164.848931][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 164.848931][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 164.868961][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 164.889627][ T32] ? do_writepages+0xfa/0x2a0 [ 164.889627][ T32] do_writepages+0xfa/0x2a0 [ 164.909003][ T32] ? page_writeback_cpu_online+0x10/0x10 [ 164.909003][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 164.928889][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 164.948924][ T32] __writeback_single_inode+0x12a/0x13d0 [ 164.948924][ T32] ? _raw_spin_unlock+0x24/0x40 [ 164.968949][ T32] ? wbc_attach_and_unlock_inode+0x545/0x9c0 [ 164.968949][ T32] writeback_sb_inodes+0x515/0xdc0 [ 164.968949][ T32] ? __writeback_single_inode+0x13d0/0x13d0 [ 164.968949][ T32] __writeback_inodes_wb+0xc3/0x250 [ 165.019015][ T32] wb_writeback+0x8db/0xd50 [ 165.029188][ T32] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 165.029188][ T32] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 165.029188][ T32] ? cpumask_next+0x3c/0x40 [ 165.029188][ T32] ? get_nr_dirty_inodes+0xd6/0x130 [ 165.029188][ T32] wb_workfn+0xab3/0x1090 [ 165.029188][ T32] ? inode_wait_for_writeback+0x30/0x30 [ 165.088842][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 165.099947][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 165.108956][ T32] process_one_work+0x965/0x1690 [ 165.108956][ T32] ? lock_release+0x800/0x800 [ 165.128820][ T32] ? pwq_dec_nr_in_flight+0x310/0x310 [ 165.128820][ T32] ? rwlock_bug.part.0+0x90/0x90 [ 165.128820][ T32] worker_thread+0x96/0xe10 [ 165.128820][ T32] ? process_one_work+0x1690/0x1690 [ 165.128820][ T32] kthread+0x3b5/0x4a0 [ 165.158826][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 165.158826][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 165.169089][ T32] ret_from_fork+0x1f/0x30 [ 165.182377][ T32] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32 [ 165.199598][ T32] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 165.207370][ T32] CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 165.209474][ T32] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 165.209474][ T32] Workqueue: writeback wb_workfn (flush-8:0) [ 165.209474][ T32] Call Trace: [ 165.209474][ T32] dump_stack+0x18f/0x20d [ 165.209474][ T32] check_preemption_disabled+0x20d/0x220 [ 165.209474][ T32] ext4_mb_new_blocks+0xa4d/0x3b70 [ 165.209474][ T32] ? ext4_find_extent+0x81a/0xad0 [ 165.209474][ T32] ? ext4_ext_search_right+0x2ca/0xb20 [ 165.209474][ T32] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 165.209474][ T32] ext4_ext_map_blocks+0x201b/0x33e0 [ 165.209474][ T32] ? ext4_ext_release+0x10/0x10 [ 165.209474][ T32] ? down_write_killable+0x170/0x170 [ 165.209474][ T32] ? ext4_es_lookup_extent+0x41d/0xd10 [ 165.209474][ T32] ext4_map_blocks+0x4cb/0x1640 [ 165.209474][ T32] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 165.209474][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 165.209474][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 165.209474][ T32] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 165.209474][ T32] ext4_writepages+0x1a7b/0x33c0 [ 165.209474][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 165.209474][ T32] ? __lock_acquire+0x2224/0x48b0 [ 165.209474][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 165.209474][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 165.209474][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 165.209474][ T32] ? do_writepages+0xfa/0x2a0 [ 165.209474][ T32] do_writepages+0xfa/0x2a0 [ 165.209474][ T32] ? page_writeback_cpu_online+0x10/0x10 [ 165.209474][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 165.209474][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 165.209474][ T32] __writeback_single_inode+0x12a/0x13d0 [ 165.209474][ T32] ? _raw_spin_unlock+0x24/0x40 [ 165.209474][ T32] ? wbc_attach_and_unlock_inode+0x545/0x9c0 [ 165.209474][ T32] writeback_sb_inodes+0x515/0xdc0 [ 165.209474][ T32] ? __writeback_single_inode+0x13d0/0x13d0 [ 165.209474][ T32] __writeback_inodes_wb+0xc3/0x250 [ 165.209474][ T32] wb_writeback+0x8db/0xd50 [ 165.209474][ T32] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 165.209474][ T32] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 165.209474][ T32] ? cpumask_next+0x3c/0x40 [ 165.209474][ T32] ? get_nr_dirty_inodes+0xd6/0x130 [ 165.209474][ T32] wb_workfn+0xab3/0x1090 [ 165.209474][ T32] ? inode_wait_for_writeback+0x30/0x30 [ 165.209474][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 165.209474][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 165.209474][ T32] process_one_work+0x965/0x1690 [ 165.209474][ T32] ? lock_release+0x800/0x800 [ 165.209474][ T32] ? pwq_dec_nr_in_flight+0x310/0x310 [ 165.209474][ T32] ? rwlock_bug.part.0+0x90/0x90 [ 165.209474][ T32] worker_thread+0x96/0xe10 [ 165.209474][ T32] ? process_one_work+0x1690/0x1690 [ 165.209474][ T32] kthread+0x3b5/0x4a0 [ 165.209474][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 165.209474][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 165.209474][ T32] ret_from_fork+0x1f/0x30 [ 165.622802][ T32] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32 [ 165.634203][ T32] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 165.646045][ T32] CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 165.655687][ T32] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 165.655687][ T32] Workqueue: writeback wb_workfn (flush-8:0) [ 165.655687][ T32] Call Trace: [ 165.655687][ T32] dump_stack+0x18f/0x20d [ 165.655687][ T32] check_preemption_disabled+0x20d/0x220 [ 165.655687][ T32] ext4_mb_new_blocks+0xa4d/0x3b70 [ 165.655687][ T32] ? ext4_find_extent+0x81a/0xad0 [ 165.655687][ T32] ? ext4_ext_search_right+0x2ca/0xb20 [ 165.655687][ T32] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 165.655687][ T32] ext4_ext_map_blocks+0x201b/0x33e0 [ 165.655687][ T32] ? ext4_ext_release+0x10/0x10 [ 165.655687][ T32] ? down_write_killable+0x170/0x170 [ 165.655687][ T32] ? ext4_es_lookup_extent+0x41d/0xd10 [ 165.655687][ T32] ext4_map_blocks+0x4cb/0x1640 [ 165.655687][ T32] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 165.655687][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 165.655687][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 165.655687][ T32] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 165.655687][ T32] ext4_writepages+0x1a7b/0x33c0 [ 165.655687][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 165.848919][ T32] ? __lock_acquire+0x2224/0x48b0 [ 165.848919][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 165.848919][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 165.869010][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 165.869010][ T32] ? do_writepages+0xfa/0x2a0 [ 165.869010][ T32] do_writepages+0xfa/0x2a0 [ 165.889252][ T32] ? page_writeback_cpu_online+0x10/0x10 [ 165.889252][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 165.889252][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 165.908864][ T32] __writeback_single_inode+0x12a/0x13d0 [ 165.908864][ T32] ? _raw_spin_unlock+0x24/0x40 [ 165.928842][ T32] ? wbc_attach_and_unlock_inode+0x545/0x9c0 [ 165.928842][ T32] writeback_sb_inodes+0x515/0xdc0 [ 165.928842][ T32] ? __writeback_single_inode+0x13d0/0x13d0 [ 165.949128][ T32] __writeback_inodes_wb+0xc3/0x250 [ 165.949128][ T32] wb_writeback+0x8db/0xd50 [ 165.949128][ T32] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 165.968838][ T32] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 165.968838][ T32] ? cpumask_next+0x3c/0x40 [ 165.968838][ T32] ? get_nr_dirty_inodes+0xd6/0x130 [ 165.988863][ T32] wb_workfn+0xab3/0x1090 [ 165.998851][ T32] ? inode_wait_for_writeback+0x30/0x30 [ 165.998851][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 166.008963][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 166.008963][ T32] process_one_work+0x965/0x1690 [ 166.008963][ T32] ? lock_release+0x800/0x800 [ 166.029166][ T32] ? pwq_dec_nr_in_flight+0x310/0x310 [ 166.029166][ T32] ? rwlock_bug.part.0+0x90/0x90 [ 166.029166][ T32] worker_thread+0x96/0xe10 [ 166.048860][ T32] ? process_one_work+0x1690/0x1690 [ 166.048860][ T32] kthread+0x3b5/0x4a0 [ 166.048860][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 166.070181][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 166.079431][ T32] ret_from_fork+0x1f/0x30 [ 166.100900][ T32] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32 [ 166.112627][ T32] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 166.120040][ T32] CPU: 2 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 166.129953][ T32] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 166.129953][ T32] Workqueue: writeback wb_workfn (flush-8:0) [ 166.129953][ T32] Call Trace: [ 166.129953][ T32] dump_stack+0x18f/0x20d [ 166.129953][ T32] check_preemption_disabled+0x20d/0x220 [ 166.129953][ T32] ext4_mb_new_blocks+0xa4d/0x3b70 [ 166.129953][ T32] ? ext4_find_extent+0x81a/0xad0 [ 166.129953][ T32] ? ext4_ext_search_right+0x2ca/0xb20 [ 166.129953][ T32] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 166.219658][ T32] ext4_ext_map_blocks+0x201b/0x33e0 [ 166.219658][ T32] ? ext4_ext_release+0x10/0x10 [ 166.228863][ T32] ? down_write_killable+0x170/0x170 [ 166.228863][ T32] ? ext4_es_lookup_extent+0x41d/0xd10 [ 166.228863][ T32] ext4_map_blocks+0x4cb/0x1640 [ 166.228863][ T32] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 166.228863][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 166.228863][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 166.228863][ T32] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 166.228863][ T32] ext4_writepages+0x1a7b/0x33c0 [ 166.228863][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 166.228863][ T32] ? __lock_acquire+0x2224/0x48b0 [ 166.228863][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 166.228863][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 166.228863][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 166.228863][ T32] ? do_writepages+0xfa/0x2a0 [ 166.228863][ T32] do_writepages+0xfa/0x2a0 [ 166.228863][ T32] ? page_writeback_cpu_online+0x10/0x10 [ 166.228863][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 166.228863][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 166.228863][ T32] __writeback_single_inode+0x12a/0x13d0 [ 166.228863][ T32] ? _raw_spin_unlock+0x24/0x40 [ 166.228863][ T32] ? wbc_attach_and_unlock_inode+0x545/0x9c0 [ 166.228863][ T32] writeback_sb_inodes+0x515/0xdc0 [ 166.228863][ T32] ? __writeback_single_inode+0x13d0/0x13d0 [ 166.228863][ T32] __writeback_inodes_wb+0xc3/0x250 [ 166.228863][ T32] wb_writeback+0x8db/0xd50 [ 166.228863][ T32] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 166.228863][ T32] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 166.228863][ T32] ? cpumask_next+0x3c/0x40 [ 166.228863][ T32] ? get_nr_dirty_inodes+0xd6/0x130 [ 166.228863][ T32] wb_workfn+0xab3/0x1090 [ 166.228863][ T32] ? inode_wait_for_writeback+0x30/0x30 [ 166.228863][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 166.228863][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 166.228863][ T32] process_one_work+0x965/0x1690 [ 166.228863][ T32] ? lock_release+0x800/0x800 [ 166.228863][ T32] ? pwq_dec_nr_in_flight+0x310/0x310 [ 166.228863][ T32] ? rwlock_bug.part.0+0x90/0x90 [ 166.228863][ T32] worker_thread+0x96/0xe10 [ 166.228863][ T32] ? process_one_work+0x1690/0x1690 [ 166.228863][ T32] kthread+0x3b5/0x4a0 [ 166.228863][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 166.228863][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 166.228863][ T32] ret_from_fork+0x1f/0x30 [ 166.585765][ T32] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32 [ 166.602864][ T32] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 166.617248][ T32] CPU: 2 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 166.627122][ T32] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 166.627122][ T32] Workqueue: writeback wb_workfn (flush-8:0) [ 166.627122][ T32] Call Trace: [ 166.627122][ T32] dump_stack+0x18f/0x20d [ 166.627122][ T32] check_preemption_disabled+0x20d/0x220 [ 166.627122][ T32] ext4_mb_new_blocks+0xa4d/0x3b70 [ 166.627122][ T32] ? ext4_ext_search_right+0x2ca/0xb20 [ 166.627122][ T32] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 166.627122][ T32] ext4_ext_map_blocks+0x201b/0x33e0 [ 166.627122][ T32] ? ext4_ext_release+0x10/0x10 [ 166.627122][ T32] ? down_write_killable+0x170/0x170 [ 166.627122][ T32] ? ext4_es_lookup_extent+0x41d/0xd10 [ 166.627122][ T32] ext4_map_blocks+0x4cb/0x1640 [ 166.627122][ T32] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 166.627122][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 166.627122][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 166.627122][ T32] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 166.627122][ T32] ext4_writepages+0x1a7b/0x33c0 [ 166.627122][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 166.627122][ T32] ? __lock_acquire+0x2224/0x48b0 [ 166.627122][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 166.627122][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 166.627122][ T32] ? do_writepages+0xfa/0x2a0 [ 166.627122][ T32] do_writepages+0xfa/0x2a0 [ 166.627122][ T32] ? page_writeback_cpu_online+0x10/0x10 [ 166.627122][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 166.627122][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 166.627122][ T32] __writeback_single_inode+0x12a/0x13d0 [ 166.627122][ T32] ? _raw_spin_unlock+0x24/0x40 [ 166.627122][ T32] ? wbc_attach_and_unlock_inode+0x545/0x9c0 [ 166.627122][ T32] writeback_sb_inodes+0x515/0xdc0 [ 166.627122][ T32] ? __writeback_single_inode+0x13d0/0x13d0 [ 166.627122][ T32] __writeback_inodes_wb+0xc3/0x250 [ 166.627122][ T32] wb_writeback+0x8db/0xd50 [ 166.627122][ T32] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 166.627122][ T32] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 166.627122][ T32] ? cpumask_next+0x3c/0x40 [ 166.627122][ T32] ? get_nr_dirty_inodes+0xd6/0x130 [ 166.627122][ T32] wb_workfn+0xab3/0x1090 [ 166.627122][ T32] ? inode_wait_for_writeback+0x30/0x30 [ 166.627122][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 166.627122][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 166.627122][ T32] process_one_work+0x965/0x1690 [ 166.627122][ T32] ? lock_release+0x800/0x800 [ 166.627122][ T32] ? pwq_dec_nr_in_flight+0x310/0x310 [ 166.627122][ T32] ? rwlock_bug.part.0+0x90/0x90 [ 166.627122][ T32] worker_thread+0x96/0xe10 [ 166.627122][ T32] ? process_one_work+0x1690/0x1690 [ 166.627122][ T32] kthread+0x3b5/0x4a0 [ 166.627122][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 166.627122][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 166.627122][ T32] ret_from_fork+0x1f/0x30 [ 167.130739][ T32] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32 [ 167.143770][ T32] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 167.153595][ T32] CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 167.163536][ T32] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 167.163536][ T32] Workqueue: writeback wb_workfn (flush-8:0) [ 167.163536][ T32] Call Trace: [ 167.163536][ T32] dump_stack+0x18f/0x20d [ 167.163536][ T32] check_preemption_disabled+0x20d/0x220 [ 167.163536][ T32] ext4_mb_new_blocks+0xa4d/0x3b70 [ 167.163536][ T32] ? ext4_ext_search_right+0x2ca/0xb20 [ 167.163536][ T32] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 167.163536][ T32] ext4_ext_map_blocks+0x201b/0x33e0 [ 167.163536][ T32] ? ext4_ext_release+0x10/0x10 [ 167.163536][ T32] ? down_write_killable+0x170/0x170 [ 167.163536][ T32] ? ext4_es_lookup_extent+0x41d/0xd10 [ 167.163536][ T32] ext4_map_blocks+0x4cb/0x1640 [ 167.163536][ T32] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 167.163536][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 167.163536][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 167.163536][ T32] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 167.163536][ T32] ext4_writepages+0x1a7b/0x33c0 [ 167.163536][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 167.163536][ T32] ? __lock_acquire+0x2224/0x48b0 [ 167.163536][ T32] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 167.163536][ T32] ? __ext4_mark_inode_dirty+0x940/0x940 [ 167.163536][ T32] ? do_writepages+0xfa/0x2a0 [ 167.163536][ T32] do_writepages+0xfa/0x2a0 [ 167.163536][ T32] ? page_writeback_cpu_online+0x10/0x10 [ 167.163536][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 167.163536][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 167.163536][ T32] __writeback_single_inode+0x12a/0x13d0 [ 167.163536][ T32] ? _raw_spin_unlock+0x24/0x40 [ 167.163536][ T32] ? wbc_attach_and_unlock_inode+0x545/0x9c0 [ 167.163536][ T32] writeback_sb_inodes+0x515/0xdc0 [ 167.163536][ T32] ? __writeback_single_inode+0x13d0/0x13d0 [ 167.163536][ T32] __writeback_inodes_wb+0xc3/0x250 [ 167.163536][ T32] wb_writeback+0x8db/0xd50 [ 167.163536][ T32] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 167.163536][ T32] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 167.163536][ T32] ? cpumask_next+0x3c/0x40 [ 167.163536][ T32] ? get_nr_dirty_inodes+0xd6/0x130 [ 167.163536][ T32] wb_workfn+0xab3/0x1090 [ 167.163536][ T32] ? inode_wait_for_writeback+0x30/0x30 [ 167.163536][ T32] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 167.163536][ T32] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 167.163536][ T32] process_one_work+0x965/0x1690 [ 167.163536][ T32] ? lock_release+0x800/0x800 [ 167.163536][ T32] ? pwq_dec_nr_in_flight+0x310/0x310 [ 167.163536][ T32] ? rwlock_bug.part.0+0x90/0x90 [ 167.163536][ T32] worker_thread+0x96/0xe10 [ 167.163536][ T32] ? process_one_work+0x1690/0x1690 [ 167.163536][ T32] kthread+0x3b5/0x4a0 [ 167.163536][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 167.163536][ T32] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 167.163536][ T32] ret_from_fork+0x1f/0x30