[ 48.786705][ T6764] RAX: ffffffffffffffda RBX: 0000564f232d7985 RCX: 00007fe5bee52687 [ 48.794687][ T6764] RDX: 00007ffe613a3d10 RSI: 00000000000001ed RDI: 0000564f232d7985 [ 48.802669][ T6764] RBP: 00007fe5bee52680 R08: 0000000000000100 R09: 0000000000000000 [ 48.810660][ T6764] R10: 0000564f232d7980 R11: 0000000000000246 R12: 00000000000001ed [ 48.818641][ T6764] R13: 00007ffe613a3fd0 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 56.168250][ T503] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:5/503 [ 56.177408][ T503] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 56.183439][ T503] CPU: 1 PID: 503 Comm: kworker/u4:5 Not tainted 5.7.0-syzkaller #0 [ 56.191409][ T503] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.201451][ T503] Workqueue: writeback wb_workfn (flush-8:0) [ 56.207418][ T503] Call Trace: [ 56.210689][ T503] dump_stack+0x188/0x20d [ 56.214998][ T503] debug_smp_processor_id.cold+0x88/0x9b [ 56.220694][ T503] ext4_mb_new_blocks+0xa77/0x3b30 [ 56.225791][ T503] ? __kmalloc+0x62f/0x7a0 [ 56.230191][ T503] ? ext4_ext_search_right+0x2ca/0xb20 [ 56.235633][ T503] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 56.241339][ T503] ext4_ext_map_blocks+0x2044/0x3410 [ 56.246606][ T503] ? ext4_ext_release+0x10/0x10 [ 56.251443][ T503] ? __down_timeout+0x2d0/0x2d0 [ 56.256269][ T503] ? ext4_es_lookup_extent+0x41d/0xd30 [ 56.261705][ T503] ? debug_smp_processor_id+0x2f/0x185 [ 56.267143][ T503] ext4_map_blocks+0x4cb/0x1640 [ 56.271990][ T503] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 56.277178][ T503] ? debug_smp_processor_id+0x2f/0x185 [ 56.282619][ T503] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.288665][ T503] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.294626][ T503] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 56.300101][ T503] ext4_writepages+0x1ab7/0x3400 [ 56.305062][ T503] ? __ext4_mark_inode_dirty+0x950/0x950 [ 56.310675][ T503] ? __lock_acquire+0x2224/0x48a0 [ 56.315689][ T503] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 56.321673][ T503] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 56.327634][ T503] ? __ext4_mark_inode_dirty+0x950/0x950 [ 56.333244][ T503] ? do_writepages+0xfa/0x2a0 [ 56.337909][ T503] do_writepages+0xfa/0x2a0 [ 56.342392][ T503] ? page_writeback_cpu_online+0x10/0x10 [ 56.348015][ T503] ? debug_smp_processor_id+0x2f/0x185 [ 56.353463][ T503] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.358983][ T503] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.364935][ T503] ? lock_downgrade+0x840/0x840 [ 56.369776][ T503] __writeback_single_inode+0x12a/0x1410 [ 56.375386][ T503] ? _raw_spin_unlock+0x24/0x40 [ 56.380215][ T503] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 56.386170][ T503] writeback_sb_inodes+0x515/0xdd0 [ 56.391272][ T503] ? __writeback_single_inode+0x1410/0x1410 [ 56.397151][ T503] __writeback_inodes_wb+0xc3/0x250 [ 56.402333][ T503] wb_writeback+0x910/0xd90 [ 56.406837][ T503] ? print_usage_bug+0x240/0x240 [ 56.411752][ T503] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 56.418103][ T503] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 56.423974][ T503] ? cpumask_next+0x3c/0x40 [ 56.428468][ T503] ? get_nr_dirty_inodes+0xd6/0x130 [ 56.433647][ T503] wb_workfn+0xadf/0x10d0 [ 56.437964][ T503] ? inode_wait_for_writeback+0x30/0x30 [ 56.443494][ T503] ? debug_smp_processor_id+0x2f/0x185 [ 56.448944][ T503] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.454473][ T503] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.460610][ T503] process_one_work+0x965/0x16a0 [ 56.465686][ T503] ? lock_release+0x800/0x800 [ 56.470343][ T503] ? pwq_dec_nr_in_flight+0x310/0x310 [ 56.475693][ T503] ? rwlock_bug.part.0+0x90/0x90 [ 56.480614][ T503] worker_thread+0x96/0xe10 [ 56.485102][ T503] ? process_one_work+0x16a0/0x16a0 [ 56.490304][ T503] kthread+0x388/0x470 [ 56.494351][ T503] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 56.500046][ T503] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 56.505760][ T503] ret_from_fork+0x24/0x30 Warning: Permanently added '10.128.10.35' (ECDSA) to the list of known hosts. 2020/06/10 17:25:15 fuzzer started [ 58.259511][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 58.268813][ T1155] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 58.274922][ T1155] CPU: 0 PID: 1155 Comm: khugepaged Not tainted 5.7.0-syzkaller #0 [ 58.282818][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.292899][ T1155] Call Trace: [ 58.296191][ T1155] dump_stack+0x188/0x20d [ 58.300516][ T1155] debug_smp_processor_id.cold+0x88/0x9b [ 58.306136][ T1155] ext4_mb_new_blocks+0xa77/0x3b30 [ 58.311237][ T1155] ? __kmalloc+0x62f/0x7a0 [ 58.315658][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.321126][ T1155] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.326856][ T1155] ext4_ext_map_blocks+0x2044/0x3410 [ 58.332144][ T1155] ? ext4_ext_release+0x10/0x10 [ 58.336999][ T1155] ? __down_timeout+0x2d0/0x2d0 [ 58.341835][ T1155] ? ext4_es_lookup_extent+0x41d/0xd30 [ 58.347288][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 58.352154][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.357432][ T1155] ? debug_smp_processor_id+0x2f/0x185 [ 58.362978][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.368524][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.374490][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.379941][ T1155] ext4_writepages+0x1ab7/0x3400 [ 58.384867][ T1155] ? mark_lock+0x30/0xdd0 [ 58.389200][ T1155] ? __ext4_mark_inode_dirty+0x950/0x950 [ 58.394859][ T1155] ? __ext4_mark_inode_dirty+0x950/0x950 [ 58.400476][ T1155] ? do_writepages+0xfa/0x2a0 [ 58.405139][ T1155] do_writepages+0xfa/0x2a0 [ 58.409642][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 58.415269][ T1155] ? do_raw_spin_lock+0x129/0x2e0 [ 58.420281][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 58.425466][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 58.430308][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 58.436015][ T1155] ? collapse_file+0x3575/0x4300 [ 58.440939][ T1155] ? delete_from_page_cache_batch+0xec0/0xec0 [ 58.447018][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 58.452214][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.458205][ T1155] collapse_file+0x357f/0x4300 [ 58.462977][ T1155] ? collapse_huge_page+0x4370/0x4370 [ 58.468338][ T1155] ? khugepaged+0x24fa/0x3f80 [ 58.473022][ T1155] khugepaged+0x3049/0x3f80 [ 58.477534][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 58.483156][ T1155] ? lock_downgrade+0x840/0x840 [ 58.487999][ T1155] ? finish_wait+0x260/0x260 [ 58.492579][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 58.498373][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.504344][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 58.509370][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 58.514988][ T1155] kthread+0x388/0x470 [ 58.519045][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.524749][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.530540][ T1155] ret_from_fork+0x24/0x30 [ 58.618562][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 58.627694][ T1155] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 58.633601][ T1155] CPU: 0 PID: 1155 Comm: khugepaged Not tainted 5.7.0-syzkaller #0 [ 58.641484][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.651549][ T1155] Call Trace: [ 58.654843][ T1155] dump_stack+0x188/0x20d [ 58.659153][ T1155] debug_smp_processor_id.cold+0x88/0x9b [ 58.664771][ T1155] ext4_mb_new_blocks+0xa77/0x3b30 [ 58.669875][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.675310][ T1155] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 58.681440][ T1155] ext4_ext_map_blocks+0x2044/0x3410 [ 58.686703][ T1155] ? ext4_ext_release+0x10/0x10 [ 58.691544][ T1155] ? __down_timeout+0x2d0/0x2d0 [ 58.696381][ T1155] ? ext4_es_lookup_extent+0x41d/0xd30 [ 58.701830][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 58.706666][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.711838][ T1155] ? debug_smp_processor_id+0x2f/0x185 [ 58.717275][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.722796][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.728750][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.734187][ T1155] ext4_writepages+0x1ab7/0x3400 [ 58.739102][ T1155] ? mark_lock+0x30/0xdd0 [ 58.743416][ T1155] ? __ext4_mark_inode_dirty+0x950/0x950 [ 58.749048][ T1155] ? __ext4_mark_inode_dirty+0x950/0x950 [ 58.754671][ T1155] ? do_writepages+0xfa/0x2a0 [ 58.759324][ T1155] do_writepages+0xfa/0x2a0 [ 58.763811][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 58.769431][ T1155] ? do_raw_spin_lock+0x129/0x2e0 [ 58.775821][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 58.780992][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 58.785906][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 58.791603][ T1155] ? collapse_file+0x3575/0x4300 [ 58.796535][ T1155] ? delete_from_page_cache_batch+0xec0/0xec0 [ 58.802596][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 58.807769][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.813828][ T1155] collapse_file+0x357f/0x4300 [ 58.818577][ T1155] ? collapse_huge_page+0x4370/0x4370 [ 58.823922][ T1155] ? khugepaged+0x24fa/0x3f80 [ 58.828584][ T1155] khugepaged+0x3049/0x3f80 [ 58.833095][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 58.838705][ T1155] ? lock_downgrade+0x840/0x840 [ 58.843530][ T1155] ? finish_wait+0x260/0x260 [ 58.849052][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 58.854844][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.860806][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 58.865808][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 58.871415][ T1155] kthread+0x388/0x470 [ 58.875459][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.881167][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.886861][ T1155] ret_from_fork+0x24/0x30 [ 58.946413][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 58.955572][ T1155] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 58.961541][ T1155] CPU: 0 PID: 1155 Comm: khugepaged Not tainted 5.7.0-syzkaller #0 [ 58.969463][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.979531][ T1155] Call Trace: [ 58.982869][ T1155] dump_stack+0x188/0x20d [ 58.987202][ T1155] debug_smp_processor_id.cold+0x88/0x9b [ 58.992839][ T1155] ext4_mb_new_blocks+0xa77/0x3b30 [ 58.997967][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.003434][ T1155] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 59.009677][ T1155] ext4_ext_map_blocks+0x2044/0x3410 [ 59.014989][ T1155] ? ext4_ext_release+0x10/0x10 [ 59.019845][ T1155] ? __down_timeout+0x2d0/0x2d0 [ 59.024673][ T1155] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.030114][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 59.034956][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.040131][ T1155] ? debug_smp_processor_id+0x2f/0x185 2020/06/10 17:25:15 connecting to host at 10.128.0.26:38179 [ 59.045571][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.051094][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.057055][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 59.062511][ T1155] ext4_writepages+0x1ab7/0x3400 [ 59.067461][ T1155] ? mark_lock+0x30/0xdd0 [ 59.071811][ T1155] ? __ext4_mark_inode_dirty+0x950/0x950 [ 59.077473][ T1155] ? __ext4_mark_inode_dirty+0x950/0x950 [ 59.083108][ T1155] ? do_writepages+0xfa/0x2a0 [ 59.087796][ T1155] do_writepages+0xfa/0x2a0 [ 59.092307][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 59.097933][ T1155] ? do_raw_spin_lock+0x129/0x2e0 [ 59.102940][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 59.108116][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 59.112945][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 59.118652][ T1155] ? collapse_file+0x3575/0x4300 [ 59.123572][ T1155] ? delete_from_page_cache_batch+0xec0/0xec0 [ 59.129619][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 59.134790][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.140834][ T1155] collapse_file+0x357f/0x4300 [ 59.145581][ T1155] ? collapse_huge_page+0x4370/0x4370 [ 59.150928][ T1155] ? khugepaged+0x24fa/0x3f80 [ 59.155589][ T1155] khugepaged+0x3049/0x3f80 [ 59.160089][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 59.165694][ T1155] ? lock_downgrade+0x840/0x840 [ 59.170526][ T1155] ? finish_wait+0x260/0x260 [ 59.175091][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 59.180869][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.186826][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 59.191823][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 2020/06/10 17:25:16 checking machine... 2020/06/10 17:25:16 checking revisions... [ 59.197430][ T1155] kthread+0x388/0x470 [ 59.201472][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.207164][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.212881][ T1155] ret_from_fork+0x24/0x30 2020/06/10 17:25:16 testing simple program... [ 59.470297][ T6784] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6784 [ 59.479439][ T6784] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 59.485352][ T6784] CPU: 1 PID: 6784 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 59.493220][ T6784] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.503267][ T6784] Call Trace: [ 59.506554][ T6784] dump_stack+0x188/0x20d [ 59.510884][ T6784] debug_smp_processor_id.cold+0x88/0x9b [ 59.516504][ T6784] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.521607][ T6784] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.527063][ T6784] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.532778][ T6784] ext4_ext_map_blocks+0x2044/0x3410 [ 59.538061][ T6784] ? ext4_ext_release+0x10/0x10 [ 59.542896][ T6784] ? __down_timeout+0x2d0/0x2d0 [ 59.547719][ T6784] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.553160][ T6784] ext4_map_blocks+0x4cb/0x1640 [ 59.557997][ T6784] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.563185][ T6784] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.568718][ T6784] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.574681][ T6784] ? prandom_u32_state+0xe/0x170 [ 59.579594][ T6784] ? __brelse+0x84/0xa0 [ 59.583723][ T6784] ? __ext4_new_inode+0x144/0x57c0 [ 59.588826][ T6784] ext4_getblk+0xad/0x520 [ 59.593132][ T6784] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.598827][ T6784] ? ext4_free_inode+0x17e0/0x17e0 [ 59.603926][ T6784] ext4_bread+0x7c/0x380 [ 59.608145][ T6784] ? ext4_getblk+0x520/0x520 [ 59.612722][ T6784] ? dqget+0xff0/0xff0 [ 59.616769][ T6784] ext4_append+0x153/0x360 [ 59.621160][ T6784] ext4_mkdir+0x5e0/0xdf0 [ 59.625468][ T6784] ? ext4_rmdir+0xde0/0xde0 [ 59.629949][ T6784] ? security_inode_permission+0xc4/0xf0 [ 59.635577][ T6784] vfs_mkdir+0x419/0x690 [ 59.639810][ T6784] do_mkdirat+0x21e/0x280 [ 59.644115][ T6784] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.648940][ T6784] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.654898][ T6784] ? do_syscall_64+0x21/0x7d0 [ 59.659553][ T6784] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.665532][ T6784] do_syscall_64+0xf6/0x7d0 [ 59.670013][ T6784] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.675879][ T6784] RIP: 0033:0x4b02a0 [ 59.679758][ T6784] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 59.699346][ T6784] RSP: 002b:000000c0000e54b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 59.707734][ T6784] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 59.715678][ T6784] RDX: 00000000000001c0 RSI: 000000c000434860 RDI: ffffffffffffff9c [ 59.723624][ T6784] RBP: 000000c0000e5510 R08: 0000000000000000 R09: 0000000000000000 [ 59.731573][ T6784] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 59.739521][ T6784] R13: 0000000000000044 R14: 0000000000000043 R15: 0000000000000100 [ 59.765420][ T6798] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6798 [ 59.774855][ T6798] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 59.780832][ T6798] CPU: 0 PID: 6798 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.789053][ T6798] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.799113][ T6798] Call Trace: [ 59.802422][ T6798] dump_stack+0x188/0x20d [ 59.806735][ T6798] debug_smp_processor_id.cold+0x88/0x9b [ 59.812363][ T6798] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.817476][ T6798] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.822909][ T6798] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.828608][ T6798] ext4_ext_map_blocks+0x2044/0x3410 [ 59.833886][ T6798] ? ext4_ext_release+0x10/0x10 [ 59.838724][ T6798] ? __down_timeout+0x2d0/0x2d0 [ 59.843576][ T6798] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.849014][ T6798] ext4_map_blocks+0x4cb/0x1640 [ 59.853853][ T6798] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.859027][ T6798] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.864560][ T6798] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.870524][ T6798] ? prandom_u32_state+0xe/0x170 [ 59.875455][ T6798] ? __brelse+0x84/0xa0 [ 59.879592][ T6798] ? __ext4_new_inode+0x144/0x57c0 [ 59.884679][ T6798] ext4_getblk+0xad/0x520 [ 59.889005][ T6798] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.894701][ T6798] ? ext4_free_inode+0x17e0/0x17e0 [ 59.899793][ T6798] ext4_bread+0x7c/0x380 [ 59.904008][ T6798] ? ext4_getblk+0x520/0x520 [ 59.908573][ T6798] ? dqget+0xff0/0xff0 [ 59.912630][ T6798] ext4_append+0x153/0x360 [ 59.917048][ T6798] ext4_mkdir+0x5e0/0xdf0 [ 59.921367][ T6798] ? ext4_rmdir+0xde0/0xde0 [ 59.925852][ T6798] ? security_inode_permission+0xc4/0xf0 [ 59.931476][ T6798] vfs_mkdir+0x419/0x690 [ 59.935696][ T6798] do_mkdirat+0x21e/0x280 [ 59.940002][ T6798] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.944828][ T6798] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.950783][ T6798] ? do_syscall_64+0x21/0x7d0 [ 59.955437][ T6798] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.961394][ T6798] do_syscall_64+0xf6/0x7d0 [ 59.965875][ T6798] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.971759][ T6798] RIP: 0033:0x45bee7 [ 59.975640][ T6798] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 59.995228][ T6798] RSP: 002b:00007ffd492215f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 60.003613][ T6798] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 60.011561][ T6798] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffd492217d0 [ 60.019532][ T6798] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003240 [ 60.027481][ T6798] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 60.035427][ T6798] R13: 00007ffd492217d0 R14: 8421084210842109 R15: 00007ffd492217dc [ 60.114784][ T6799] IPVS: ftp: loaded support on port[0] = 21 [ 60.150243][ T6799] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6799 [ 60.159692][ T6799] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 60.165575][ T6799] CPU: 0 PID: 6799 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 60.173784][ T6799] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.183816][ T6799] Call Trace: [ 60.187087][ T6799] dump_stack+0x188/0x20d [ 60.191394][ T6799] debug_smp_processor_id.cold+0x88/0x9b [ 60.197024][ T6799] ext4_mb_new_blocks+0xa77/0x3b30 [ 60.202115][ T6799] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.207551][ T6799] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.213249][ T6799] ext4_ext_map_blocks+0x2044/0x3410 [ 60.218601][ T6799] ? ext4_ext_release+0x10/0x10 [ 60.223448][ T6799] ? __down_timeout+0x2d0/0x2d0 [ 60.228288][ T6799] ? ext4_es_lookup_extent+0x41d/0xd30 [ 60.233726][ T6799] ext4_map_blocks+0x4cb/0x1640 [ 60.238558][ T6799] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.243729][ T6799] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.249259][ T6799] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.255210][ T6799] ? prandom_u32_state+0xe/0x170 [ 60.260123][ T6799] ? __brelse+0x84/0xa0 [ 60.264251][ T6799] ? __ext4_new_inode+0x144/0x57c0 [ 60.269356][ T6799] ext4_getblk+0xad/0x520 [ 60.273669][ T6799] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.279383][ T6799] ? ext4_free_inode+0x17e0/0x17e0 [ 60.284476][ T6799] ext4_bread+0x7c/0x380 [ 60.288701][ T6799] ? ext4_getblk+0x520/0x520 [ 60.293269][ T6799] ? dqget+0xff0/0xff0 [ 60.297361][ T6799] ext4_append+0x153/0x360 [ 60.301785][ T6799] ext4_mkdir+0x5e0/0xdf0 [ 60.306093][ T6799] ? ext4_rmdir+0xde0/0xde0 [ 60.310578][ T6799] ? security_inode_permission+0xc4/0xf0 [ 60.316191][ T6799] vfs_mkdir+0x419/0x690 [ 60.320440][ T6799] do_mkdirat+0x21e/0x280 [ 60.324761][ T6799] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.329588][ T6799] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.335543][ T6799] ? do_syscall_64+0x21/0x7d0 [ 60.340220][ T6799] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.346177][ T6799] do_syscall_64+0xf6/0x7d0 [ 60.350659][ T6799] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 60.356538][ T6799] RIP: 0033:0x45bee7 [ 60.360408][ T6799] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 60.380000][ T6799] RSP: 002b:00007ffd492214e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 60.388476][ T6799] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 60.396426][ T6799] RDX: 00007ffd49221533 RSI: 00000000000001ff RDI: 00007ffd49221530 [ 60.404379][ T6799] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 60.412332][ T6799] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185d0 [ 60.420285][ T6799] R13: 00007ffd49221520 R14: 0000000000000000 R15: 00007ffd49221530 [ 60.470528][ T6799] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6799 [ 60.480048][ T6799] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 60.485942][ T6799] CPU: 0 PID: 6799 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 60.494161][ T6799] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.504229][ T6799] Call Trace: [ 60.507526][ T6799] dump_stack+0x188/0x20d [ 60.511860][ T6799] debug_smp_processor_id.cold+0x88/0x9b [ 60.517494][ T6799] ext4_mb_new_blocks+0xa77/0x3b30 [ 60.522627][ T6799] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.528124][ T6799] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.533852][ T6799] ext4_ext_map_blocks+0x2044/0x3410 [ 60.539145][ T6799] ? ext4_ext_release+0x10/0x10 [ 60.544013][ T6799] ? __down_timeout+0x2d0/0x2d0 [ 60.548865][ T6799] ? ext4_es_lookup_extent+0x41d/0xd30 [ 60.554338][ T6799] ext4_map_blocks+0x4cb/0x1640 [ 60.559255][ T6799] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.564429][ T6799] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.569954][ T6799] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.575937][ T6799] ? prandom_u32_state+0xe/0x170 [ 60.580850][ T6799] ? __brelse+0x84/0xa0 [ 60.584983][ T6799] ? __ext4_new_inode+0x144/0x57c0 [ 60.590072][ T6799] ext4_getblk+0xad/0x520 [ 60.594390][ T6799] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.600086][ T6799] ? ext4_free_inode+0x17e0/0x17e0 [ 60.605172][ T6799] ext4_bread+0x7c/0x380 [ 60.609391][ T6799] ? ext4_getblk+0x520/0x520 [ 60.613958][ T6799] ? dqget+0xff0/0xff0 [ 60.618004][ T6799] ext4_append+0x153/0x360 [ 60.622396][ T6799] ext4_mkdir+0x5e0/0xdf0 [ 60.626712][ T6799] ? ext4_rmdir+0xde0/0xde0 [ 60.631206][ T6799] ? security_inode_permission+0xc4/0xf0 [ 60.636818][ T6799] vfs_mkdir+0x419/0x690 [ 60.641036][ T6799] do_mkdirat+0x21e/0x280 [ 60.645349][ T6799] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.650172][ T6799] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.656124][ T6799] ? do_syscall_64+0x21/0x7d0 [ 60.660789][ T6799] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.666766][ T6799] do_syscall_64+0xf6/0x7d0 [ 60.671259][ T6799] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 60.677126][ T6799] RIP: 0033:0x45bee7 [ 60.680993][ T6799] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 60.700580][ T6799] RSP: 002b:00007ffd492214e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 60.708962][ T6799] RAX: ffffffffffffffda RBX: 000000000000ec38 RCX: 000000000045bee7 2020/06/10 17:25:17 building call list... [ 60.716918][ T6799] RDX: 00007ffd49221533 RSI: 00000000000001ff RDI: 00007ffd49221530 [ 60.724871][ T6799] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 60.732816][ T6799] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 60.740773][ T6799] R13: 00007ffd49221520 R14: 000000000000ec27 R15: 00007ffd49221530 [ 61.026824][ T376] tipc: TX() has been purged, node left! [ 61.509049][ T376] ================================================================== [ 61.517278][ T376] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x7a7/0x880 [ 61.525165][ T376] Write of size 1 at addr ffff88809da081e4 by task kworker/u4:4/376 [ 61.533124][ T376] [ 61.535454][ T376] CPU: 0 PID: 376 Comm: kworker/u4:4 Not tainted 5.7.0-syzkaller #0 [ 61.543415][ T376] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.553477][ T376] Workqueue: netns cleanup_net [ 61.558228][ T376] Call Trace: [ 61.561514][ T376] dump_stack+0x188/0x20d [ 61.565843][ T376] ? afs_wake_up_async_call+0x7a7/0x880 [ 61.571381][ T376] ? afs_wake_up_async_call+0x7a7/0x880 [ 61.576918][ T376] ? afs_put_call+0xa70/0xa70 [ 61.581594][ T376] print_address_description.constprop.0.cold+0xd3/0x413 [ 61.588617][ T376] ? vprintk_func+0x97/0x1a6 [ 61.593208][ T376] ? afs_wake_up_async_call+0x7a7/0x880 [ 61.598746][ T376] kasan_report.cold+0x1f/0x37 [ 61.603506][ T376] ? afs_wake_up_async_call+0x7a7/0x880 [ 61.609135][ T376] afs_wake_up_async_call+0x7a7/0x880 [ 61.614498][ T376] ? do_raw_spin_lock+0x129/0x2e0 [ 61.619518][ T376] ? afs_close_socket+0x320/0x320 [ 61.624548][ T376] ? rwlock_bug.part.0+0x90/0x90 [ 61.629486][ T376] ? rcu_read_lock_held+0x9c/0xb0 [ 61.634504][ T376] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.640133][ T376] ? afs_close_socket+0x320/0x320 [ 61.645156][ T376] ? afs_put_call+0xa70/0xa70 [ 61.649847][ T376] rxrpc_notify_socket+0x1e5/0x5e0 [ 61.654980][ T376] ? afs_put_call+0xa70/0xa70 [ 61.659658][ T376] __rxrpc_set_call_completion.part.0+0x172/0x420 [ 61.666069][ T376] rxrpc_call_completed+0xca/0xf0 [ 61.671091][ T376] rxrpc_discard_prealloc+0x786/0xac0 [ 61.676461][ T376] ? lock_sock_nested+0x94/0x110 [ 61.681396][ T376] rxrpc_listen+0x147/0x360 [ 61.685898][ T376] afs_close_socket+0x95/0x320 [ 61.690666][ T376] ? afs_purge_servers+0x16d/0x300 [ 61.695779][ T376] ? afs_rx_discard_new_call+0x50/0x50 [ 61.701259][ T376] ? debug_smp_processor_id+0x2f/0x185 [ 61.706726][ T376] ? init_wait_var_entry+0x200/0x200 [ 61.712023][ T376] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.717657][ T376] afs_net_exit+0x1bc/0x310 [ 61.722163][ T376] ? afs_net_init+0xe30/0xe30 [ 61.726833][ T376] ops_exit_list.isra.0+0xa8/0x150 [ 61.731963][ T376] cleanup_net+0x511/0xa50 [ 61.736377][ T376] ? unregister_pernet_device+0x70/0x70 [ 61.741919][ T376] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.747905][ T376] process_one_work+0x965/0x16a0 [ 61.752851][ T376] ? lock_release+0x800/0x800 [ 61.757522][ T376] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.762903][ T376] ? rwlock_bug.part.0+0x90/0x90 [ 61.767844][ T376] worker_thread+0x96/0xe10 [ 61.772354][ T376] ? process_one_work+0x16a0/0x16a0 [ 61.777550][ T376] kthread+0x388/0x470 [ 61.781624][ T376] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.787336][ T376] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.793052][ T376] ret_from_fork+0x24/0x30 [ 61.797481][ T376] [ 61.799798][ T376] Allocated by task 6799: [ 61.804121][ T376] save_stack+0x1b/0x40 [ 61.808442][ T376] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.814066][ T376] kmem_cache_alloc_trace+0x153/0x7d0 [ 61.819429][ T376] afs_alloc_call+0x55/0x640 [ 61.824014][ T376] afs_charge_preallocation+0xe9/0x2d0 [ 61.829478][ T376] afs_open_socket+0x292/0x360 [ 61.834231][ T376] afs_net_init+0xa6c/0xe30 [ 61.838726][ T376] ops_init+0xaf/0x420 [ 61.842786][ T376] setup_net+0x2de/0x860 [ 61.847021][ T376] copy_net_ns+0x293/0x590 [ 61.851430][ T376] create_new_namespaces+0x3fb/0xb30 [ 61.856705][ T376] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 61.862326][ T376] ksys_unshare+0x43d/0x8e0 [ 61.866821][ T376] __x64_sys_unshare+0x2d/0x40 [ 61.871578][ T376] do_syscall_64+0xf6/0x7d0 [ 61.876074][ T376] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.881951][ T376] [ 61.884269][ T376] Freed by task 376: [ 61.888159][ T376] save_stack+0x1b/0x40 [ 61.892304][ T376] __kasan_slab_free+0xf7/0x140 [ 61.897147][ T376] kfree+0x109/0x2b0 [ 61.901035][ T376] afs_put_call+0x59b/0xa70 [ 61.905530][ T376] rxrpc_discard_prealloc+0x769/0xac0 [ 61.910898][ T376] rxrpc_listen+0x147/0x360 [ 61.915432][ T376] afs_close_socket+0x95/0x320 [ 61.920190][ T376] afs_net_exit+0x1bc/0x310 [ 61.924688][ T376] ops_exit_list.isra.0+0xa8/0x150 [ 61.929793][ T376] cleanup_net+0x511/0xa50 [ 61.934202][ T376] process_one_work+0x965/0x16a0 [ 61.939133][ T376] worker_thread+0x96/0xe10 [ 61.943626][ T376] kthread+0x388/0x470 [ 61.947696][ T376] ret_from_fork+0x24/0x30 [ 61.952096][ T376] [ 61.954418][ T376] The buggy address belongs to the object at ffff88809da08000 [ 61.954418][ T376] which belongs to the cache kmalloc-1k of size 1024 [ 61.968458][ T376] The buggy address is located 484 bytes inside of [ 61.968458][ T376] 1024-byte region [ffff88809da08000, ffff88809da08400) [ 61.981800][ T376] The buggy address belongs to the page: [ 61.987427][ T376] page:ffffea0002768200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 61.996520][ T376] flags: 0xfffe0000000200(slab) [ 62.001368][ T376] raw: 00fffe0000000200 ffffea000299bb08 ffffea0002831388 ffff8880aa000c40 [ 62.009948][ T376] raw: 0000000000000000 ffff88809da08000 0000000100000002 0000000000000000 [ 62.018516][ T376] page dumped because: kasan: bad access detected [ 62.024912][ T376] [ 62.027233][ T376] Memory state around the buggy address: [ 62.032853][ T376] ffff88809da08080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.040904][ T376] ffff88809da08100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.048960][ T376] >ffff88809da08180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.057008][ T376] ^ [ 62.064282][ T376] ffff88809da08200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.072337][ T376] ffff88809da08280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.080384][ T376] ================================================================== [ 62.088428][ T376] Disabling lock debugging due to kernel taint [ 62.094637][ T376] Kernel panic - not syncing: panic_on_warn set ... [ 62.101226][ T376] CPU: 0 PID: 376 Comm: kworker/u4:4 Tainted: G B 5.7.0-syzkaller #0 [ 62.110602][ T376] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.120675][ T376] Workqueue: netns cleanup_net [ 62.125433][ T376] Call Trace: [ 62.128725][ T376] dump_stack+0x188/0x20d [ 62.133077][ T376] ? afs_wake_up_async_call+0x6b0/0x880 [ 62.138621][ T376] ? afs_put_call+0xa70/0xa70 [ 62.143295][ T376] panic+0x2e3/0x75c [ 62.147193][ T376] ? add_taint.cold+0x16/0x16 [ 62.151861][ T376] ? retint_kernel+0x2b/0x2b [ 62.156457][ T376] ? trace_hardirqs_on+0x55/0x230 [ 62.161475][ T376] ? afs_wake_up_async_call+0x7a7/0x880 [ 62.167041][ T376] ? afs_wake_up_async_call+0x7a7/0x880 [ 62.172580][ T376] ? afs_put_call+0xa70/0xa70 [ 62.177249][ T376] end_report+0x4d/0x53 [ 62.181407][ T376] kasan_report.cold+0xd/0x37 [ 62.186078][ T376] ? afs_wake_up_async_call+0x7a7/0x880 [ 62.191621][ T376] afs_wake_up_async_call+0x7a7/0x880 [ 62.196985][ T376] ? do_raw_spin_lock+0x129/0x2e0 [ 62.202004][ T376] ? afs_close_socket+0x320/0x320 [ 62.207021][ T376] ? rwlock_bug.part.0+0x90/0x90 [ 62.211954][ T376] ? rcu_read_lock_held+0x9c/0xb0 [ 62.216972][ T376] ? rcu_read_lock_held_common+0xa0/0xa0 [ 62.222601][ T376] ? afs_close_socket+0x320/0x320 [ 62.227614][ T376] ? afs_put_call+0xa70/0xa70 [ 62.232296][ T376] rxrpc_notify_socket+0x1e5/0x5e0 [ 62.237387][ T376] ? afs_put_call+0xa70/0xa70 [ 62.242035][ T376] __rxrpc_set_call_completion.part.0+0x172/0x420 [ 62.248430][ T376] rxrpc_call_completed+0xca/0xf0 [ 62.253434][ T376] rxrpc_discard_prealloc+0x786/0xac0 [ 62.258786][ T376] ? lock_sock_nested+0x94/0x110 [ 62.263703][ T376] rxrpc_listen+0x147/0x360 [ 62.268184][ T376] afs_close_socket+0x95/0x320 [ 62.272919][ T376] ? afs_purge_servers+0x16d/0x300 [ 62.278030][ T376] ? afs_rx_discard_new_call+0x50/0x50 [ 62.283463][ T376] ? debug_smp_processor_id+0x2f/0x185 [ 62.288895][ T376] ? init_wait_var_entry+0x200/0x200 [ 62.294151][ T376] ? rcu_read_lock_held_common+0xa0/0xa0 [ 62.299767][ T376] afs_net_exit+0x1bc/0x310 [ 62.304242][ T376] ? afs_net_init+0xe30/0xe30 [ 62.308891][ T376] ops_exit_list.isra.0+0xa8/0x150 [ 62.313975][ T376] cleanup_net+0x511/0xa50 [ 62.318364][ T376] ? unregister_pernet_device+0x70/0x70 [ 62.323881][ T376] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.329833][ T376] process_one_work+0x965/0x16a0 [ 62.334741][ T376] ? lock_release+0x800/0x800 [ 62.339400][ T376] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.344742][ T376] ? rwlock_bug.part.0+0x90/0x90 [ 62.349652][ T376] worker_thread+0x96/0xe10 [ 62.354136][ T376] ? process_one_work+0x16a0/0x16a0 [ 62.359305][ T376] kthread+0x388/0x470 [ 62.364473][ T376] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.370176][ T376] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.375876][ T376] ret_from_fork+0x24/0x30 [ 62.381488][ T376] Kernel Offset: disabled [ 62.385811][ T376] Rebooting in 86400 seconds..