[ 64.870838][ T6811] RAX: ffffffffffffffda RBX: 000055a50e83a985 RCX: 00007f0315eb1687 [ 64.878818][ T6811] RDX: 00007ffe5c8fd130 RSI: 00000000000001ed RDI: 000055a50e83a985 [ 64.886874][ T6811] RBP: 00007f0315eb1680 R08: 0000000000000100 R09: 0000000000000000 [ 64.894966][ T6811] R10: 000055a50e83a980 R11: 0000000000000246 R12: 00000000000001ed [ 64.902955][ T6811] R13: 00007ffe5c8fd3f0 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 67.730929][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 67.740045][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 67.746149][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc1-syzkaller #0 [ 67.754458][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.764650][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 67.770611][ T7] Call Trace: [ 67.773908][ T7] dump_stack+0x18f/0x20d [ 67.778249][ T7] check_preemption_disabled+0x20d/0x220 [ 67.784012][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 67.789116][ T7] ? ext4_find_extent+0x81a/0xad0 [ 67.794132][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 67.799581][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 67.805369][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 67.810672][ T7] ? ext4_ext_release+0x10/0x10 [ 67.815616][ T7] ? down_write_killable+0x170/0x170 [ 67.821225][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 67.826833][ T7] ext4_map_blocks+0x4cb/0x1640 [ 67.831684][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 67.836884][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.842434][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.848398][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 67.853841][ T7] ext4_writepages+0x1a7b/0x33c0 [ 67.858771][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 67.864387][ T7] ? __lock_acquire+0x2224/0x48b0 [ 67.869401][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 67.875399][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 67.881385][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 67.887025][ T7] ? do_writepages+0xfa/0x2a0 [ 67.891695][ T7] do_writepages+0xfa/0x2a0 [ 67.896225][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 67.901853][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.907400][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.914322][ T7] ? lock_downgrade+0x840/0x840 [ 67.919156][ T7] __writeback_single_inode+0x12a/0x13d0 [ 67.924798][ T7] ? _raw_spin_unlock+0x24/0x40 [ 67.929741][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 67.935726][ T7] writeback_sb_inodes+0x515/0xdc0 [ 67.940952][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 67.946859][ T7] __writeback_inodes_wb+0xc3/0x250 [ 67.952060][ T7] wb_writeback+0x8db/0xd50 [ 67.956725][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 67.963043][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 67.968925][ T7] ? cpumask_next+0x3c/0x40 [ 67.973416][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 67.978603][ T7] wb_workfn+0xab3/0x1090 [ 67.982927][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 67.988458][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.993982][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.999967][ T7] process_one_work+0x965/0x1690 [ 68.004898][ T7] ? lock_release+0x800/0x800 [ 68.009571][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 68.014950][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 68.019890][ T7] worker_thread+0x96/0xe10 [ 68.024391][ T7] ? process_one_work+0x1690/0x1690 [ 68.029571][ T7] kthread+0x3b5/0x4a0 [ 68.033636][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.039373][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.045093][ T7] ret_from_fork+0x1f/0x30 [ 68.051557][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 68.060610][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 68.066530][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc1-syzkaller #0 [ 68.074687][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.084909][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 68.090885][ T7] Call Trace: [ 68.094168][ T7] dump_stack+0x18f/0x20d [ 68.098487][ T7] check_preemption_disabled+0x20d/0x220 [ 68.104189][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 68.109370][ T7] ? ext4_find_extent+0x81a/0xad0 [ 68.114383][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 68.119817][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 68.125530][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 68.130799][ T7] ? ext4_ext_release+0x10/0x10 [ 68.135650][ T7] ? down_write_killable+0x170/0x170 [ 68.140913][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 68.146509][ T7] ext4_map_blocks+0x4cb/0x1640 [ 68.151344][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 68.156534][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.162058][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.168051][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 68.173591][ T7] ext4_writepages+0x1a7b/0x33c0 [ 68.178534][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 68.184167][ T7] ? __lock_acquire+0x2224/0x48b0 [ 68.189199][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 68.195247][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 68.201211][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 68.206821][ T7] ? do_writepages+0xfa/0x2a0 [ 68.211473][ T7] do_writepages+0xfa/0x2a0 [ 68.215961][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 68.221579][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.227112][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.233096][ T7] ? lock_downgrade+0x840/0x840 [ 68.237955][ T7] __writeback_single_inode+0x12a/0x13d0 [ 68.243578][ T7] ? _raw_spin_unlock+0x24/0x40 [ 68.248417][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 68.254383][ T7] writeback_sb_inodes+0x515/0xdc0 [ 68.259480][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 68.265475][ T7] __writeback_inodes_wb+0xc3/0x250 [ 68.270683][ T7] wb_writeback+0x8db/0xd50 [ 68.275204][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 68.281908][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 68.287800][ T7] ? cpumask_next+0x3c/0x40 [ 68.292291][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 68.297503][ T7] wb_workfn+0xab3/0x1090 [ 68.301833][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 68.307379][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.312924][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.318901][ T7] process_one_work+0x965/0x1690 [ 68.323840][ T7] ? lock_release+0x800/0x800 [ 68.328511][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 68.333893][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 68.338818][ T7] worker_thread+0x96/0xe10 [ 68.343453][ T7] ? process_one_work+0x1690/0x1690 [ 68.348641][ T7] kthread+0x3b5/0x4a0 [ 68.352724][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.358429][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.364140][ T7] ret_from_fork+0x1f/0x30 [ 68.371093][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 68.380347][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 68.386263][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc1-syzkaller #0 [ 68.394529][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.405561][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 68.411521][ T7] Call Trace: [ 68.414799][ T7] dump_stack+0x18f/0x20d [ 68.419128][ T7] check_preemption_disabled+0x20d/0x220 [ 68.424765][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 68.430335][ T7] ? ext4_find_extent+0x81a/0xad0 [ 68.435345][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 68.440783][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 68.446488][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 68.451760][ T7] ? ext4_ext_release+0x10/0x10 [ 68.456603][ T7] ? down_write_killable+0x170/0x170 [ 68.461890][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 68.468290][ T7] ext4_map_blocks+0x4cb/0x1640 [ 68.473142][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 68.478414][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.483941][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.489899][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 68.495686][ T7] ext4_writepages+0x1a7b/0x33c0 [ 68.503861][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 68.509500][ T7] ? __lock_acquire+0x2224/0x48b0 [ 68.514517][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 68.520481][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 68.526445][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 68.532078][ T7] ? do_writepages+0xfa/0x2a0 [ 68.536879][ T7] do_writepages+0xfa/0x2a0 [ 68.541651][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 68.547299][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.552841][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.558821][ T7] ? lock_downgrade+0x840/0x840 [ 68.563767][ T7] __writeback_single_inode+0x12a/0x13d0 [ 68.569403][ T7] ? _raw_spin_unlock+0x24/0x40 [ 68.574267][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 68.580264][ T7] writeback_sb_inodes+0x515/0xdc0 [ 68.586010][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 68.591915][ T7] __writeback_inodes_wb+0xc3/0x250 [ 68.597303][ T7] wb_writeback+0x8db/0xd50 [ 68.601802][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 68.608161][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 68.614076][ T7] ? cpumask_next+0x3c/0x40 [ 68.618573][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 68.623780][ T7] wb_workfn+0xab3/0x1090 [ 68.628487][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 68.634039][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.639582][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.645567][ T7] process_one_work+0x965/0x1690 [ 68.650625][ T7] ? lock_release+0x800/0x800 [ 68.655300][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 68.660676][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 68.666139][ T7] worker_thread+0x96/0xe10 [ 68.670648][ T7] ? process_one_work+0x1690/0x1690 [ 68.675922][ T7] kthread+0x3b5/0x4a0 [ 68.679974][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.685686][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.691409][ T7] ret_from_fork+0x1f/0x30 [ 68.696824][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 68.705910][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 68.711924][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc1-syzkaller #0 [ 68.720081][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.730761][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 68.736726][ T7] Call Trace: [ 68.740108][ T7] dump_stack+0x18f/0x20d [ 68.744482][ T7] check_preemption_disabled+0x20d/0x220 [ 68.750111][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 68.755409][ T7] ? ext4_find_extent+0x81a/0xad0 [ 68.760434][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 68.765877][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 68.771948][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 68.777223][ T7] ? ext4_ext_release+0x10/0x10 [ 68.782125][ T7] ? down_write_killable+0x170/0x170 [ 68.787437][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 68.792902][ T7] ext4_map_blocks+0x4cb/0x1640 [ 68.797958][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 68.803584][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.809135][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.815292][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 68.820738][ T7] ext4_writepages+0x1a7b/0x33c0 [ 68.825699][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 68.831426][ T7] ? __lock_acquire+0x2224/0x48b0 [ 68.836548][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 68.842513][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 68.848490][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 68.854210][ T7] ? do_writepages+0xfa/0x2a0 [ 68.858869][ T7] do_writepages+0xfa/0x2a0 [ 68.863459][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 68.869090][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.874636][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.880771][ T7] ? lock_downgrade+0x840/0x840 [ 68.886141][ T7] __writeback_single_inode+0x12a/0x13d0 [ 68.891762][ T7] ? _raw_spin_unlock+0x24/0x40 [ 68.896594][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 68.902558][ T7] writeback_sb_inodes+0x515/0xdc0 [ 68.907658][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 68.913546][ T7] __writeback_inodes_wb+0xc3/0x250 [ 68.918953][ T7] wb_writeback+0x8db/0xd50 [ 68.923466][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 68.929788][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 68.935682][ T7] ? cpumask_next+0x3c/0x40 [ 68.940178][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 68.945390][ T7] wb_workfn+0xab3/0x1090 [ 68.949835][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 68.955400][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.961156][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.967336][ T7] process_one_work+0x965/0x1690 [ 68.972281][ T7] ? lock_release+0x800/0x800 [ 68.976983][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 68.982535][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 68.987460][ T7] worker_thread+0x96/0xe10 [ 68.991954][ T7] ? process_one_work+0x1690/0x1690 [ 68.997136][ T7] kthread+0x3b5/0x4a0 [ 69.001202][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 69.006987][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 69.012709][ T7] ret_from_fork+0x1f/0x30 [ 69.019143][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 69.028227][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 69.034252][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc1-syzkaller #0 [ 69.043453][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.053518][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 69.059489][ T7] Call Trace: [ 69.063216][ T7] dump_stack+0x18f/0x20d [ 69.067532][ T7] check_preemption_disabled+0x20d/0x220 [ 69.073150][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 69.078503][ T7] ? ext4_find_extent+0x81a/0xad0 [ 69.083772][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 69.089246][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 69.094983][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 69.100284][ T7] ? ext4_ext_release+0x10/0x10 [ 69.105450][ T7] ? down_write_killable+0x170/0x170 [ 69.110729][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 69.116206][ T7] ext4_map_blocks+0x4cb/0x1640 [ 69.121055][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 69.126248][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 69.131876][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 69.137864][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 69.143335][ T7] ext4_writepages+0x1a7b/0x33c0 [ 69.148270][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 69.153886][ T7] ? __lock_acquire+0x2224/0x48b0 [ 69.158901][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 69.165681][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 69.171647][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 69.177329][ T7] ? do_writepages+0xfa/0x2a0 [ 69.182089][ T7] do_writepages+0xfa/0x2a0 [ 69.186577][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 69.192208][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 69.197733][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 69.203708][ T7] ? lock_downgrade+0x840/0x840 [ 69.208563][ T7] __writeback_single_inode+0x12a/0x13d0 [ 69.214199][ T7] ? _raw_spin_unlock+0x24/0x40 [ 69.219233][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 69.225211][ T7] writeback_sb_inodes+0x515/0xdc0 [ 69.230403][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 69.236294][ T7] __writeback_inodes_wb+0xc3/0x250 [ 69.241480][ T7] wb_writeback+0x8db/0xd50 [ 69.245971][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 69.252399][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 69.258275][ T7] ? cpumask_next+0x3c/0x40 [ 69.262758][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 69.267970][ T7] wb_workfn+0xab3/0x1090 [ 69.272297][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 69.277836][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 69.283522][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 69.289524][ T7] process_one_work+0x965/0x1690 [ 69.294564][ T7] ? lock_release+0x800/0x800 [ 69.299232][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 69.304635][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 69.309584][ T7] worker_thread+0x96/0xe10 [ 69.314086][ T7] ? process_one_work+0x1690/0x1690 [ 69.319268][ T7] kthread+0x3b5/0x4a0 [ 69.323335][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 69.329075][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 69.334787][ T7] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts. 2020/06/16 02:15:07 fuzzer started 2020/06/16 02:15:08 connecting to host at 10.128.0.26:44327 2020/06/16 02:15:08 checking machine... 2020/06/16 02:15:08 checking revisions... 2020/06/16 02:15:08 testing simple program... [ 71.187120][ T6835] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6835 [ 71.196405][ T6835] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 71.202410][ T6835] CPU: 0 PID: 6835 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 71.210639][ T6835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.220679][ T6835] Call Trace: [ 71.223965][ T6835] dump_stack+0x18f/0x20d [ 71.228296][ T6835] check_preemption_disabled+0x20d/0x220 [ 71.233926][ T6835] ext4_mb_new_blocks+0xa4d/0x3b70 [ 71.239037][ T6835] ? ext4_ext_search_right+0x2ca/0xb20 [ 71.244496][ T6835] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 71.250234][ T6835] ext4_ext_map_blocks+0x201b/0x33e0 [ 71.255538][ T6835] ? ext4_ext_release+0x10/0x10 [ 71.260412][ T6835] ? down_write_killable+0x170/0x170 [ 71.265682][ T6835] ? ext4_es_lookup_extent+0x41d/0xd10 [ 71.271125][ T6835] ext4_map_blocks+0x4cb/0x1640 [ 71.275966][ T6835] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 71.281145][ T6835] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 71.286667][ T6835] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 71.292638][ T6835] ? prandom_u32_state+0xe/0x170 [ 71.297565][ T6835] ? __brelse+0x84/0xa0 [ 71.301702][ T6835] ? __ext4_new_inode+0x144/0x55e0 [ 71.306820][ T6835] ext4_getblk+0xad/0x520 [ 71.311140][ T6835] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 71.316844][ T6835] ? ext4_free_inode+0x1700/0x1700 [ 71.321947][ T6835] ext4_bread+0x7c/0x380 [ 71.326172][ T6835] ? ext4_getblk+0x520/0x520 [ 71.330751][ T6835] ? dquot_get_next_dqblk+0x180/0x180 [ 71.336628][ T6835] ext4_append+0x153/0x360 [ 71.341028][ T6835] ext4_mkdir+0x5e0/0xdf0 [ 71.345340][ T6835] ? ext4_rmdir+0xde0/0xde0 [ 71.349832][ T6835] ? security_inode_permission+0xc4/0xf0 [ 71.355445][ T6835] vfs_mkdir+0x419/0x690 [ 71.359667][ T6835] do_mkdirat+0x21e/0x280 [ 71.363975][ T6835] ? __ia32_sys_mknod+0xb0/0xb0 [ 71.368825][ T6835] ? do_syscall_64+0x1c/0xe0 [ 71.373416][ T6835] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 71.379379][ T6835] do_syscall_64+0x60/0xe0 [ 71.383960][ T6835] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 71.389848][ T6835] RIP: 0033:0x4b02a0 [ 71.393732][ T6835] Code: Bad RIP value. [ 71.397807][ T6835] RSP: 002b:000000c0000cb4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 71.406224][ T6835] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 71.414185][ T6835] RDX: 00000000000001c0 RSI: 000000c0003164e0 RDI: ffffffffffffff9c [ 71.422147][ T6835] RBP: 000000c0000cb510 R08: 0000000000000000 R09: 0000000000000000 [ 71.430127][ T6835] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 71.438301][ T6835] R13: 0000000000000028 R14: 0000000000000027 R15: 0000000000000100 [ 71.455067][ T6837] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6837 [ 71.464648][ T6837] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 71.470824][ T6837] CPU: 0 PID: 6837 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 71.479889][ T6837] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.490468][ T6837] Call Trace: [ 71.493765][ T6837] dump_stack+0x18f/0x20d [ 71.498093][ T6837] check_preemption_disabled+0x20d/0x220 [ 71.503852][ T6837] ext4_mb_new_blocks+0xa4d/0x3b70 [ 71.509001][ T6837] ? ext4_ext_search_right+0x2ca/0xb20 [ 71.514460][ T6837] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 71.520328][ T6837] ext4_ext_map_blocks+0x201b/0x33e0 [ 71.525734][ T6837] ? ext4_ext_release+0x10/0x10 [ 71.530593][ T6837] ? down_write_killable+0x170/0x170 [ 71.536277][ T6837] ? ext4_es_lookup_extent+0x41d/0xd10 [ 71.541835][ T6837] ext4_map_blocks+0x4cb/0x1640 [ 71.546735][ T6837] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 71.551940][ T6837] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 71.557607][ T6837] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 71.563817][ T6837] ? prandom_u32_state+0xe/0x170 [ 71.568894][ T6837] ? __brelse+0x84/0xa0 [ 71.573073][ T6837] ? __ext4_new_inode+0x144/0x55e0 [ 71.578439][ T6837] ext4_getblk+0xad/0x520 [ 71.582877][ T6837] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 71.588611][ T6837] ? ext4_free_inode+0x1700/0x1700 [ 71.593726][ T6837] ext4_bread+0x7c/0x380 [ 71.598037][ T6837] ? ext4_getblk+0x520/0x520 [ 71.602761][ T6837] ? dquot_get_next_dqblk+0x180/0x180 [ 71.608161][ T6837] ext4_append+0x153/0x360 [ 71.612624][ T6837] ext4_mkdir+0x5e0/0xdf0 [ 71.616960][ T6837] ? ext4_rmdir+0xde0/0xde0 [ 71.621620][ T6837] ? security_inode_permission+0xc4/0xf0 [ 71.627655][ T6837] vfs_mkdir+0x419/0x690 [ 71.632152][ T6837] do_mkdirat+0x21e/0x280 [ 71.636518][ T6837] ? __ia32_sys_mknod+0xb0/0xb0 [ 71.641467][ T6837] ? do_syscall_64+0x1c/0xe0 [ 71.647907][ T6837] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 71.654036][ T6837] do_syscall_64+0x60/0xe0 [ 71.658537][ T6837] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 71.664436][ T6837] RIP: 0033:0x45bed7 [ 71.668840][ T6837] Code: Bad RIP value. [ 71.672958][ T6837] RSP: 002b:00007fff74724688 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 71.681687][ T6837] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 71.690509][ T6837] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007fff74724860 [ 71.699606][ T6837] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 00000000000039c0 [ 71.707683][ T6837] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 71.717102][ T6837] R13: 00007fff74724860 R14: 8421084210842109 R15: 00007fff7472486c [ 71.824368][ T6838] IPVS: ftp: loaded support on port[0] = 21 [ 71.866775][ T6838] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6838 [ 71.876810][ T6838] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 71.882954][ T6838] CPU: 1 PID: 6838 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 71.891939][ T6838] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.902618][ T6838] Call Trace: [ 71.906066][ T6838] dump_stack+0x18f/0x20d [ 71.910570][ T6838] check_preemption_disabled+0x20d/0x220 [ 71.917273][ T6838] ext4_mb_new_blocks+0xa4d/0x3b70 [ 71.923480][ T6838] ? ext4_ext_search_right+0x2ca/0xb20 [ 71.929287][ T6838] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 71.936404][ T6838] ext4_ext_map_blocks+0x201b/0x33e0 [ 71.942305][ T6838] ? ext4_ext_release+0x10/0x10 [ 71.947918][ T6838] ? down_write_killable+0x170/0x170 [ 71.953235][ T6838] ? ext4_es_lookup_extent+0x41d/0xd10 [ 71.959375][ T6838] ext4_map_blocks+0x4cb/0x1640 [ 71.965124][ T6838] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 71.970667][ T6838] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 71.976717][ T6838] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 71.983093][ T6838] ? prandom_u32_state+0xe/0x170 [ 71.988490][ T6838] ? __brelse+0x84/0xa0 [ 71.993170][ T6838] ? __ext4_new_inode+0x144/0x55e0 [ 71.999073][ T6838] ext4_getblk+0xad/0x520 [ 72.003514][ T6838] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 72.009390][ T6838] ? ext4_free_inode+0x1700/0x1700 [ 72.015451][ T6838] ext4_bread+0x7c/0x380 [ 72.019788][ T6838] ? ext4_getblk+0x520/0x520 [ 72.024449][ T6838] ? dquot_get_next_dqblk+0x180/0x180 [ 72.029839][ T6838] ext4_append+0x153/0x360 [ 72.035072][ T6838] ext4_mkdir+0x5e0/0xdf0 [ 72.039608][ T6838] ? ext4_rmdir+0xde0/0xde0 [ 72.044294][ T6838] ? security_inode_permission+0xc4/0xf0 [ 72.049940][ T6838] vfs_mkdir+0x419/0x690 [ 72.054261][ T6838] do_mkdirat+0x21e/0x280 [ 72.059909][ T6838] ? __ia32_sys_mknod+0xb0/0xb0 [ 72.065992][ T6838] ? do_syscall_64+0x1c/0xe0 [ 72.071298][ T6838] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 72.077381][ T6838] do_syscall_64+0x60/0xe0 [ 72.082377][ T6838] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 72.088800][ T6838] RIP: 0033:0x45bed7 [ 72.093319][ T6838] Code: Bad RIP value. [ 72.097509][ T6838] RSP: 002b:00007fff74724578 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 72.106144][ T6838] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 72.115166][ T6838] RDX: 00007fff747245c3 RSI: 00000000000001ff RDI: 00007fff747245c0 [ 72.123231][ T6838] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 72.131625][ T6838] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185c0 [ 72.140920][ T6838] R13: 00007fff747245b0 R14: 0000000000000000 R15: 00007fff747245c0 [ 72.201050][ T6838] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6838 [ 72.211574][ T6838] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 72.217951][ T6838] CPU: 1 PID: 6838 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 72.227242][ T6838] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.238027][ T6838] Call Trace: [ 72.241946][ T6838] dump_stack+0x18f/0x20d [ 72.246503][ T6838] check_preemption_disabled+0x20d/0x220 [ 72.252841][ T6838] ext4_mb_new_blocks+0xa4d/0x3b70 [ 72.258359][ T6838] ? ext4_ext_search_right+0x2ca/0xb20 [ 72.264111][ T6838] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 72.270212][ T6838] ext4_ext_map_blocks+0x201b/0x33e0 [ 72.275825][ T6838] ? ext4_ext_release+0x10/0x10 [ 72.281544][ T6838] ? down_write_killable+0x170/0x170 [ 72.287198][ T6838] ? ext4_es_lookup_extent+0x41d/0xd10 [ 72.293091][ T6838] ext4_map_blocks+0x4cb/0x1640 [ 72.299244][ T6838] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 72.306365][ T6838] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 72.312880][ T6838] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 72.319466][ T6838] ? prandom_u32_state+0xe/0x170 [ 72.325131][ T6838] ? __brelse+0x84/0xa0 [ 72.329755][ T6838] ? __ext4_new_inode+0x144/0x55e0 [ 72.335223][ T6838] ext4_getblk+0xad/0x520 [ 72.339863][ T6838] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 72.347101][ T6838] ? ext4_free_inode+0x1700/0x1700 [ 72.352609][ T6838] ext4_bread+0x7c/0x380 [ 72.357094][ T6838] ? ext4_getblk+0x520/0x520 [ 72.361772][ T6838] ? dquot_get_next_dqblk+0x180/0x180 [ 72.368116][ T6838] ext4_append+0x153/0x360 [ 72.372817][ T6838] ext4_mkdir+0x5e0/0xdf0 [ 72.377309][ T6838] ? ext4_rmdir+0xde0/0xde0 [ 72.381880][ T6838] ? security_inode_permission+0xc4/0xf0 [ 72.387908][ T6838] vfs_mkdir+0x419/0x690 [ 72.392220][ T6838] do_mkdirat+0x21e/0x280 [ 72.396791][ T6838] ? __ia32_sys_mknod+0xb0/0xb0 [ 72.402057][ T6838] ? do_syscall_64+0x1c/0xe0 [ 72.406665][ T6838] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 72.412660][ T6838] do_syscall_64+0x60/0xe0 [ 72.417269][ T6838] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 72.423184][ T6838] RIP: 0033:0x45bed7 [ 72.427483][ T6838] Code: Bad RIP value. [ 72.431565][ T6838] RSP: 002b:00007fff74724578 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 72.440412][ T6838] RAX: ffffffffffffffda RBX: 00000000000119fa RCX: 000000000045bed7 2020/06/16 02:15:09 building call list... [ 72.449090][ T6838] RDX: 00007fff747245c3 RSI: 00000000000001ff RDI: 00007fff747245c0 [ 72.457869][ T6838] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 72.466401][ T6838] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 72.475618][ T6838] R13: 00007fff747245b0 R14: 00000000000119e6 R15: 00007fff747245c0 [ 72.729530][ T118] tipc: TX() has been purged, node left! [ 72.866736][ T1157] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1157 [ 72.877729][ T1157] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 72.884231][ T1157] CPU: 0 PID: 1157 Comm: khugepaged Not tainted 5.8.0-rc1-syzkaller #0 [ 72.893368][ T1157] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.904377][ T1157] Call Trace: [ 72.907790][ T1157] dump_stack+0x18f/0x20d [ 72.912322][ T1157] check_preemption_disabled+0x20d/0x220 [ 72.918500][ T1157] ext4_mb_new_blocks+0xa4d/0x3b70 [ 72.924159][ T1157] ? ext4_find_extent+0x81a/0xad0 [ 72.930197][ T1157] ? ext4_ext_search_right+0x2ca/0xb20 [ 72.935916][ T1157] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 72.941844][ T1157] ext4_ext_map_blocks+0x201b/0x33e0 [ 72.947163][ T1157] ? ext4_ext_release+0x10/0x10 [ 72.952249][ T1157] ? down_write_killable+0x170/0x170 [ 72.957911][ T1157] ? ext4_es_lookup_extent+0x41d/0xd10 [ 72.963404][ T1157] ext4_map_blocks+0x4cb/0x1640 [ 72.968423][ T1157] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 72.973968][ T1157] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 72.980662][ T1157] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 72.987518][ T1157] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 72.993118][ T1157] ext4_writepages+0x1a7b/0x33c0 [ 72.998505][ T1157] ? lock_release+0x7f0/0x800 [ 73.003654][ T1157] ? __ext4_mark_inode_dirty+0x940/0x940 [ 73.009579][ T1157] ? __ext4_mark_inode_dirty+0x940/0x940 [ 73.016170][ T1157] ? do_writepages+0xfa/0x2a0 [ 73.021062][ T1157] do_writepages+0xfa/0x2a0 [ 73.025584][ T1157] ? page_writeback_cpu_online+0x10/0x10 [ 73.031598][ T1157] ? do_raw_spin_lock+0x120/0x2d0 [ 73.036723][ T1157] ? do_raw_spin_unlock+0x171/0x260 [ 73.042236][ T1157] ? _raw_spin_unlock+0x24/0x40 [ 73.047105][ T1157] __filemap_fdatawrite_range+0x2aa/0x390 [ 73.052851][ T1157] ? collapse_file+0x35a2/0x4330 [ 73.058151][ T1157] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 73.064705][ T1157] ? _raw_spin_unlock_irq+0x1f/0x80 [ 73.070617][ T1157] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 73.076886][ T1157] collapse_file+0x35ac/0x4330 [ 73.082239][ T1157] ? collapse_huge_page+0x4350/0x4350 [ 73.087625][ T1157] ? khugepaged+0x2506/0x3fc0 [ 73.092425][ T1157] ? xas_find+0x31a/0x880 [ 73.096961][ T1157] ? check_preemption_disabled+0x38/0x220 [ 73.102862][ T1157] khugepaged+0x3041/0x3fc0 [ 73.107994][ T1157] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 73.114430][ T1157] ? lock_downgrade+0x840/0x840 [ 73.120469][ T1157] ? finish_wait+0x260/0x260 [ 73.125440][ T1157] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 73.132222][ T1157] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 73.139248][ T1157] ? __kthread_parkme+0x13f/0x1e0 [ 73.144522][ T1157] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 73.150195][ T1157] kthread+0x3b5/0x4a0 [ 73.154612][ T1157] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 73.160467][ T1157] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 73.166289][ T1157] ret_from_fork+0x1f/0x30 [ 73.258809][ T1157] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1157 [ 73.269481][ T1157] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 73.276220][ T1157] CPU: 1 PID: 1157 Comm: khugepaged Not tainted 5.8.0-rc1-syzkaller #0 [ 73.285083][ T1157] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.295770][ T1157] Call Trace: [ 73.299610][ T1157] dump_stack+0x18f/0x20d [ 73.303995][ T1157] check_preemption_disabled+0x20d/0x220 [ 73.309940][ T1157] ext4_mb_new_blocks+0xa4d/0x3b70 [ 73.315167][ T1157] ? ext4_ext_search_right+0x2ca/0xb20 [ 73.322230][ T1157] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 73.328585][ T1157] ext4_ext_map_blocks+0x201b/0x33e0 [ 73.333990][ T1157] ? ext4_ext_release+0x10/0x10 [ 73.338886][ T1157] ? down_write_killable+0x170/0x170 [ 73.344593][ T1157] ? ext4_es_lookup_extent+0x41d/0xd10 [ 73.350260][ T1157] ext4_map_blocks+0x4cb/0x1640 [ 73.355220][ T1157] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 73.360440][ T1157] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 73.366363][ T1157] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 73.372593][ T1157] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 73.378468][ T1157] ext4_writepages+0x1a7b/0x33c0 [ 73.383762][ T1157] ? lock_release+0x7f0/0x800 [ 73.389084][ T1157] ? __ext4_mark_inode_dirty+0x940/0x940 [ 73.395144][ T1157] ? __ext4_mark_inode_dirty+0x940/0x940 [ 73.401673][ T1157] ? do_writepages+0xfa/0x2a0 [ 73.407264][ T1157] do_writepages+0xfa/0x2a0 [ 73.411855][ T1157] ? page_writeback_cpu_online+0x10/0x10 [ 73.417684][ T1157] ? do_raw_spin_lock+0x120/0x2d0 [ 73.422823][ T1157] ? do_raw_spin_unlock+0x171/0x260 [ 73.428579][ T1157] ? _raw_spin_unlock+0x24/0x40 [ 73.433542][ T1157] __filemap_fdatawrite_range+0x2aa/0x390 [ 73.439421][ T1157] ? collapse_file+0x35a2/0x4330 [ 73.445041][ T1157] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 73.451352][ T1157] ? _raw_spin_unlock_irq+0x1f/0x80 [ 73.456886][ T1157] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 73.463565][ T1157] collapse_file+0x35ac/0x4330 [ 73.468693][ T1157] ? collapse_huge_page+0x4350/0x4350 [ 73.474420][ T1157] ? khugepaged+0x2506/0x3fc0 [ 73.479491][ T1157] ? xas_find+0x31a/0x880 [ 73.483839][ T1157] ? check_preemption_disabled+0x38/0x220 [ 73.489671][ T1157] khugepaged+0x3041/0x3fc0 [ 73.494215][ T1157] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 73.500055][ T1157] ? lock_downgrade+0x840/0x840 [ 73.505251][ T1157] ? finish_wait+0x260/0x260 [ 73.510046][ T1157] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 73.516145][ T1157] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 73.522151][ T1157] ? __kthread_parkme+0x13f/0x1e0 [ 73.527254][ T1157] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 73.533288][ T1157] kthread+0x3b5/0x4a0 [ 73.537383][ T1157] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 73.543237][ T1157] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 73.549888][ T1157] ret_from_fork+0x1f/0x30 [ 73.697901][ T1157] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1157 [ 73.707265][ T1157] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 73.714207][ T1157] CPU: 1 PID: 1157 Comm: khugepaged Not tainted 5.8.0-rc1-syzkaller #0 [ 73.722751][ T1157] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.732990][ T1157] Call Trace: [ 73.736309][ T1157] dump_stack+0x18f/0x20d [ 73.740843][ T1157] check_preemption_disabled+0x20d/0x220 [ 73.746765][ T1157] ext4_mb_new_blocks+0xa4d/0x3b70 [ 73.753053][ T1157] ? ext4_ext_search_right+0x2ca/0xb20 [ 73.758670][ T1157] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 73.765134][ T1157] ext4_ext_map_blocks+0x201b/0x33e0 [ 73.770545][ T1157] ? ext4_ext_release+0x10/0x10 [ 73.775694][ T1157] ? down_write_killable+0x170/0x170 [ 73.780993][ T1157] ? ext4_es_lookup_extent+0x41d/0xd10 [ 73.786698][ T1157] ext4_map_blocks+0x4cb/0x1640 [ 73.791770][ T1157] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 73.797161][ T1157] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 73.802810][ T1157] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 73.809036][ T1157] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 73.814520][ T1157] ext4_writepages+0x1a7b/0x33c0 [ 73.819964][ T1157] ? lock_release+0x7f0/0x800 [ 73.824691][ T1157] ? __ext4_mark_inode_dirty+0x940/0x940 [ 73.830654][ T1157] ? __ext4_mark_inode_dirty+0x940/0x940 [ 73.836611][ T1157] ? do_writepages+0xfa/0x2a0 [ 73.841309][ T1157] do_writepages+0xfa/0x2a0 [ 73.846117][ T1157] ? page_writeback_cpu_online+0x10/0x10 [ 73.851809][ T1157] ? do_raw_spin_lock+0x120/0x2d0 [ 73.857596][ T1157] ? do_raw_spin_unlock+0x171/0x260 [ 73.862869][ T1157] ? _raw_spin_unlock+0x24/0x40 [ 73.868112][ T1157] __filemap_fdatawrite_range+0x2aa/0x390 [ 73.874151][ T1157] ? collapse_file+0x35a2/0x4330 [ 73.879322][ T1157] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 73.885778][ T1157] ? _raw_spin_unlock_irq+0x1f/0x80 [ 73.891788][ T1157] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 executing program [ 73.898857][ T1157] collapse_file+0x35ac/0x4330 [ 73.904226][ T1157] ? collapse_huge_page+0x4350/0x4350 [ 73.909765][ T1157] ? khugepaged+0x2506/0x3fc0 [ 73.914568][ T1157] ? xas_find+0x31a/0x880 [ 73.919065][ T1157] ? check_preemption_disabled+0x38/0x220 [ 73.924898][ T1157] khugepaged+0x3041/0x3fc0 [ 73.929753][ T1157] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 73.936391][ T1157] ? lock_downgrade+0x840/0x840 [ 73.943044][ T1157] ? finish_wait+0x260/0x260 [ 73.947996][ T1157] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 73.954232][ T1157] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 73.960336][ T1157] ? __kthread_parkme+0x13f/0x1e0 [ 73.965634][ T1157] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 73.973542][ T1157] kthread+0x3b5/0x4a0 [ 73.977985][ T1157] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 73.983808][ T1157] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 73.991650][ T1157] ret_from_fork+0x1f/0x30 [ 74.272230][ T118] ================================================================== [ 74.281138][ T118] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 74.290815][ T118] Write of size 1 at addr ffff8880966451e4 by task kworker/u4:3/118 [ 74.298983][ T118] [ 74.301335][ T118] CPU: 0 PID: 118 Comm: kworker/u4:3 Not tainted 5.8.0-rc1-syzkaller #0 [ 74.309684][ T118] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.319757][ T118] Workqueue: netns cleanup_net [ 74.324522][ T118] Call Trace: [ 74.327833][ T118] dump_stack+0x18f/0x20d [ 74.332187][ T118] ? afs_wake_up_async_call+0x6aa/0x770 [ 74.337827][ T118] ? afs_wake_up_async_call+0x6aa/0x770 [ 74.343464][ T118] ? afs_put_call+0xa40/0xa40 [ 74.348277][ T118] print_address_description.constprop.0.cold+0xd3/0x413 [ 74.355664][ T118] ? vprintk_func+0x97/0x1a6 [ 74.360271][ T118] ? afs_wake_up_async_call+0x6aa/0x770 [ 74.365842][ T118] kasan_report.cold+0x1f/0x37 [ 74.370623][ T118] ? rcu_read_lock_held_common+0x51/0xa0 [ 74.376268][ T118] ? afs_wake_up_async_call+0x6aa/0x770 [ 74.381837][ T118] afs_wake_up_async_call+0x6aa/0x770 [ 74.387213][ T118] ? afs_close_socket+0x320/0x320 [ 74.392384][ T118] ? afs_put_call+0xa40/0xa40 [ 74.397158][ T118] rxrpc_notify_socket+0x1db/0x5d0 [ 74.402370][ T118] ? afs_put_call+0xa40/0xa40 [ 74.407317][ T118] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 74.413849][ T118] rxrpc_call_completed+0xca/0xf0 [ 74.419001][ T118] rxrpc_discard_prealloc+0x781/0xab0 [ 74.424522][ T118] ? lock_sock_nested+0x94/0x110 [ 74.429485][ T118] rxrpc_listen+0x147/0x360 [ 74.434150][ T118] afs_close_socket+0x95/0x320 [ 74.438957][ T118] ? afs_purge_servers+0x16d/0x300 [ 74.444093][ T118] ? afs_rx_discard_new_call+0x50/0x50 [ 74.450135][ T118] ? init_wait_var_entry+0x200/0x200 [ 74.455542][ T118] ? rcu_read_lock_held_common+0xa0/0xa0 [ 74.462540][ T118] ? check_preemption_disabled+0x38/0x220 [ 74.468381][ T118] afs_net_exit+0x1bc/0x310 [ 74.473167][ T118] ? afs_net_init+0xe30/0xe30 [ 74.477964][ T118] ops_exit_list.isra.0+0xa8/0x150 [ 74.483303][ T118] cleanup_net+0x511/0xa50 [ 74.487967][ T118] ? unregister_pernet_device+0x70/0x70 [ 74.493668][ T118] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 74.501126][ T118] process_one_work+0x965/0x1690 [ 74.506463][ T118] ? lock_release+0x800/0x800 [ 74.512007][ T118] ? pwq_dec_nr_in_flight+0x310/0x310 [ 74.517732][ T118] ? rwlock_bug.part.0+0x90/0x90 [ 74.522994][ T118] worker_thread+0x96/0xe10 [ 74.528302][ T118] ? process_one_work+0x1690/0x1690 [ 74.534280][ T118] kthread+0x3b5/0x4a0 [ 74.538634][ T118] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 74.544641][ T118] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 74.550719][ T118] ret_from_fork+0x1f/0x30 [ 74.555628][ T118] [ 74.557956][ T118] Allocated by task 6838: [ 74.562624][ T118] save_stack+0x1b/0x40 [ 74.567138][ T118] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 74.574641][ T118] kmem_cache_alloc_trace+0x153/0x7d0 [ 74.580361][ T118] afs_alloc_call+0x55/0x630 [ 74.585164][ T118] afs_charge_preallocation+0xe9/0x2d0 [ 74.591168][ T118] afs_open_socket+0x292/0x360 [ 74.596224][ T118] afs_net_init+0xa6c/0xe30 [ 74.600725][ T118] ops_init+0xaf/0x420 [ 74.605095][ T118] setup_net+0x2de/0x860 [ 74.609547][ T118] copy_net_ns+0x293/0x590 [ 74.614224][ T118] create_new_namespaces+0x3fb/0xb30 [ 74.619809][ T118] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 74.625714][ T118] ksys_unshare+0x43d/0x8e0 [ 74.630749][ T118] __x64_sys_unshare+0x2d/0x40 [ 74.635673][ T118] do_syscall_64+0x60/0xe0 [ 74.641316][ T118] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.647282][ T118] [ 74.649602][ T118] Freed by task 118: [ 74.653918][ T118] save_stack+0x1b/0x40 [ 74.658430][ T118] __kasan_slab_free+0xf7/0x140 [ 74.663417][ T118] kfree+0x109/0x2b0 [ 74.667821][ T118] afs_put_call+0x585/0xa40 [ 74.672907][ T118] rxrpc_discard_prealloc+0x764/0xab0 [ 74.678367][ T118] rxrpc_listen+0x147/0x360 [ 74.683744][ T118] afs_close_socket+0x95/0x320 [ 74.688538][ T118] afs_net_exit+0x1bc/0x310 [ 74.693080][ T118] ops_exit_list.isra.0+0xa8/0x150 [ 74.698391][ T118] cleanup_net+0x511/0xa50 [ 74.703335][ T118] process_one_work+0x965/0x1690 [ 74.708406][ T118] worker_thread+0x96/0xe10 [ 74.712942][ T118] kthread+0x3b5/0x4a0 [ 74.717316][ T118] ret_from_fork+0x1f/0x30 [ 74.721916][ T118] [ 74.724379][ T118] The buggy address belongs to the object at ffff888096645000 [ 74.724379][ T118] which belongs to the cache kmalloc-1k of size 1024 [ 74.739050][ T118] The buggy address is located 484 bytes inside of [ 74.739050][ T118] 1024-byte region [ffff888096645000, ffff888096645400) [ 74.752643][ T118] The buggy address belongs to the page: [ 74.758374][ T118] page:ffffea0002599140 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 74.767965][ T118] flags: 0xfffe0000000200(slab) [ 74.773097][ T118] raw: 00fffe0000000200 ffffea00029abc88 ffffea00024d8588 ffff8880aa000c40 [ 74.781820][ T118] raw: 0000000000000000 ffff888096645000 0000000100000002 0000000000000000 [ 74.790460][ T118] page dumped because: kasan: bad access detected [ 74.797039][ T118] [ 74.799508][ T118] Memory state around the buggy address: [ 74.805851][ T118] ffff888096645080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.814178][ T118] ffff888096645100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.822626][ T118] >ffff888096645180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.831207][ T118] ^ [ 74.839481][ T118] ffff888096645200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.848667][ T118] ffff888096645280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.857850][ T118] ================================================================== [ 74.866799][ T118] Disabling lock debugging due to kernel taint [ 74.873050][ T118] Kernel panic - not syncing: panic_on_warn set ... [ 74.879913][ T118] CPU: 0 PID: 118 Comm: kworker/u4:3 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 74.890037][ T118] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.900682][ T118] Workqueue: netns cleanup_net [ 74.905459][ T118] Call Trace: [ 74.908865][ T118] dump_stack+0x18f/0x20d [ 74.913205][ T118] ? afs_wake_up_async_call+0x670/0x770 [ 74.919560][ T118] ? afs_put_call+0xa40/0xa40 [ 74.924355][ T118] panic+0x2e3/0x75c [ 74.929360][ T118] ? __warn_printk+0xf3/0xf3 [ 74.934568][ T118] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 74.941099][ T118] ? trace_hardirqs_on+0x55/0x220 [ 74.946601][ T118] ? afs_wake_up_async_call+0x6aa/0x770 [ 74.952730][ T118] ? afs_wake_up_async_call+0x6aa/0x770 [ 74.958632][ T118] ? afs_put_call+0xa40/0xa40 [ 74.963587][ T118] end_report+0x4d/0x53 [ 74.967885][ T118] kasan_report.cold+0xd/0x37 [ 74.972792][ T118] ? rcu_read_lock_held_common+0x51/0xa0 [ 74.980168][ T118] ? afs_wake_up_async_call+0x6aa/0x770 [ 74.986505][ T118] afs_wake_up_async_call+0x6aa/0x770 [ 74.992019][ T118] ? afs_close_socket+0x320/0x320 [ 74.997345][ T118] ? afs_put_call+0xa40/0xa40 [ 75.002340][ T118] rxrpc_notify_socket+0x1db/0x5d0 [ 75.007784][ T118] ? afs_put_call+0xa40/0xa40 [ 75.013262][ T118] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 75.020334][ T118] rxrpc_call_completed+0xca/0xf0 [ 75.025759][ T118] rxrpc_discard_prealloc+0x781/0xab0 [ 75.031348][ T118] ? lock_sock_nested+0x94/0x110 [ 75.036576][ T118] rxrpc_listen+0x147/0x360 [ 75.041680][ T118] afs_close_socket+0x95/0x320 [ 75.047010][ T118] ? afs_purge_servers+0x16d/0x300 [ 75.052552][ T118] ? afs_rx_discard_new_call+0x50/0x50 [ 75.058093][ T118] ? init_wait_var_entry+0x200/0x200 [ 75.063555][ T118] ? rcu_read_lock_held_common+0xa0/0xa0 [ 75.069400][ T118] ? check_preemption_disabled+0x38/0x220 [ 75.075163][ T118] afs_net_exit+0x1bc/0x310 [ 75.079747][ T118] ? afs_net_init+0xe30/0xe30 [ 75.084710][ T118] ops_exit_list.isra.0+0xa8/0x150 [ 75.090259][ T118] cleanup_net+0x511/0xa50 [ 75.094666][ T118] ? unregister_pernet_device+0x70/0x70 [ 75.100203][ T118] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 75.106304][ T118] process_one_work+0x965/0x1690 [ 75.111253][ T118] ? lock_release+0x800/0x800 [ 75.115954][ T118] ? pwq_dec_nr_in_flight+0x310/0x310 [ 75.121322][ T118] ? rwlock_bug.part.0+0x90/0x90 [ 75.126285][ T118] worker_thread+0x96/0xe10 [ 75.130788][ T118] ? process_one_work+0x1690/0x1690 [ 75.135973][ T118] kthread+0x3b5/0x4a0 [ 75.140190][ T118] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 75.146308][ T118] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 75.152387][ T118] ret_from_fork+0x1f/0x30 [ 75.159275][ T118] Kernel Offset: disabled [ 75.163782][ T118] Rebooting in 86400 seconds..