[ 51.245736][ T6843] R10: 000055ec7d6d7980 R11: 0000000000000246 R12: 00000000000001ed [ 51.245744][ T6843] R13: 00007ffd3f755360 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 56.393342][ T2863] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:5/2863 [ 56.402965][ T2863] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 56.408856][ T2863] CPU: 1 PID: 2863 Comm: kworker/u4:5 Not tainted 5.7.0-syzkaller #0 [ 56.416984][ T2863] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.427047][ T2863] Workqueue: writeback wb_workfn (flush-8:0) [ 56.433001][ T2863] Call Trace: [ 56.436273][ T2863] dump_stack+0x188/0x20d [ 56.440582][ T2863] debug_smp_processor_id.cold+0x88/0x9b [ 56.446193][ T2863] ext4_mb_new_blocks+0xa77/0x3b30 [ 56.451281][ T2863] ? __kmalloc+0x62f/0x7a0 [ 56.455746][ T2863] ? ext4_ext_search_right+0x2ca/0xb20 [ 56.461179][ T2863] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 56.466888][ T2863] ext4_ext_map_blocks+0x2044/0x3410 [ 56.472157][ T2863] ? ext4_ext_release+0x10/0x10 [ 56.476996][ T2863] ? __down_timeout+0x2d0/0x2d0 [ 56.481828][ T2863] ? ext4_es_lookup_extent+0x41d/0xd30 [ 56.487262][ T2863] ? debug_smp_processor_id+0x2f/0x185 [ 56.492700][ T2863] ext4_map_blocks+0x4cb/0x1640 [ 56.497619][ T2863] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 56.502807][ T2863] ? debug_smp_processor_id+0x2f/0x185 [ 56.508258][ T2863] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.513797][ T2863] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.519761][ T2863] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 56.525212][ T2863] ext4_writepages+0x1ab7/0x3400 [ 56.530138][ T2863] ? __ext4_mark_inode_dirty+0x950/0x950 [ 56.535756][ T2863] ? __lock_acquire+0x2224/0x48a0 [ 56.540766][ T2863] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 56.546725][ T2863] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 56.552700][ T2863] ? __ext4_mark_inode_dirty+0x950/0x950 [ 56.558321][ T2863] ? do_writepages+0xfa/0x2a0 [ 56.562995][ T2863] do_writepages+0xfa/0x2a0 [ 56.567507][ T2863] ? page_writeback_cpu_online+0x10/0x10 [ 56.573130][ T2863] ? debug_smp_processor_id+0x2f/0x185 [ 56.578575][ T2863] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.584107][ T2863] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.590066][ T2863] ? lock_downgrade+0x840/0x840 [ 56.594897][ T2863] __writeback_single_inode+0x12a/0x1410 [ 56.600522][ T2863] ? _raw_spin_unlock+0x24/0x40 [ 56.605365][ T2863] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 56.611321][ T2863] writeback_sb_inodes+0x515/0xdd0 [ 56.616446][ T2863] ? __writeback_single_inode+0x1410/0x1410 [ 56.622443][ T2863] __writeback_inodes_wb+0xc3/0x250 [ 56.627622][ T2863] wb_writeback+0x910/0xd90 [ 56.632120][ T2863] ? print_usage_bug+0x240/0x240 [ 56.637057][ T2863] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 56.643374][ T2863] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 56.649265][ T2863] ? cpumask_next+0x3c/0x40 [ 56.653748][ T2863] ? get_nr_dirty_inodes+0xd6/0x130 [ 56.658938][ T2863] wb_workfn+0xadf/0x10d0 [ 56.663252][ T2863] ? inode_wait_for_writeback+0x30/0x30 [ 56.668778][ T2863] ? debug_smp_processor_id+0x2f/0x185 [ 56.674230][ T2863] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.679754][ T2863] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.685724][ T2863] process_one_work+0x965/0x16a0 [ 56.690644][ T2863] ? lock_release+0x800/0x800 [ 56.695308][ T2863] ? pwq_dec_nr_in_flight+0x310/0x310 [ 56.700659][ T2863] ? rwlock_bug.part.0+0x90/0x90 [ 56.705582][ T2863] worker_thread+0x96/0xe10 [ 56.710067][ T2863] ? process_one_work+0x16a0/0x16a0 [ 56.715257][ T2863] kthread+0x388/0x470 [ 56.719315][ T2863] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 56.725007][ T2863] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 56.730717][ T2863] ret_from_fork+0x24/0x30 Warning: Permanently added '10.128.0.142' (ECDSA) to the list of known hosts. 2020/06/13 03:38:28 fuzzer started 2020/06/13 03:38:28 connecting to host at 10.128.0.26:41495 2020/06/13 03:38:28 checking machine... 2020/06/13 03:38:28 checking revisions... 2020/06/13 03:38:28 testing simple program... [ 58.958055][ T1154] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1154 [ 58.967459][ T1154] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 58.973560][ T1154] CPU: 1 PID: 1154 Comm: khugepaged Not tainted 5.7.0-syzkaller #0 [ 58.981447][ T1154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.991500][ T1154] Call Trace: [ 58.994797][ T1154] dump_stack+0x188/0x20d [ 58.999131][ T1154] debug_smp_processor_id.cold+0x88/0x9b [ 59.004771][ T1154] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.009885][ T1154] ? __kmalloc+0x62f/0x7a0 [ 59.014317][ T1154] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.019776][ T1154] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.026458][ T1154] ext4_ext_map_blocks+0x2044/0x3410 [ 59.031751][ T1154] ? ext4_ext_release+0x10/0x10 [ 59.036618][ T1154] ? __down_timeout+0x2d0/0x2d0 [ 59.041493][ T1154] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.046962][ T1154] ext4_map_blocks+0x4cb/0x1640 [ 59.051820][ T1154] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.057017][ T1154] ? debug_smp_processor_id+0x2f/0x185 [ 59.062483][ T1154] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.068028][ T1154] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.074012][ T1154] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 59.079474][ T1154] ext4_writepages+0x1ab7/0x3400 [ 59.084413][ T1154] ? mark_lock+0x30/0xdd0 [ 59.088757][ T1154] ? __ext4_mark_inode_dirty+0x950/0x950 [ 59.094417][ T1154] ? __ext4_mark_inode_dirty+0x950/0x950 [ 59.100048][ T1154] ? do_writepages+0xfa/0x2a0 [ 59.104735][ T1154] do_writepages+0xfa/0x2a0 [ 59.109240][ T1154] ? page_writeback_cpu_online+0x10/0x10 [ 59.115044][ T1154] ? do_raw_spin_lock+0x129/0x2e0 [ 59.120160][ T1154] ? do_raw_spin_unlock+0x171/0x260 [ 59.125358][ T1154] ? _raw_spin_unlock+0x24/0x40 [ 59.130223][ T1154] __filemap_fdatawrite_range+0x2aa/0x390 [ 59.135943][ T1154] ? collapse_file+0x3575/0x4300 [ 59.140880][ T1154] ? delete_from_page_cache_batch+0xec0/0xec0 [ 59.146954][ T1154] ? _raw_spin_unlock_irq+0x1f/0x80 [ 59.152157][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.158157][ T1154] collapse_file+0x357f/0x4300 [ 59.162944][ T1154] ? collapse_huge_page+0x4370/0x4370 [ 59.166690][ T6931] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6931 [ 59.168343][ T1154] ? khugepaged+0x24fa/0x3f80 [ 59.177420][ T6931] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 59.182015][ T1154] ? hash_netport6_uref+0x228/0x2e0 [ 59.182034][ T1154] khugepaged+0x3049/0x3f80 [ 59.182071][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 59.203170][ T1154] ? lock_downgrade+0x840/0x840 [ 59.208008][ T1154] ? finish_wait+0x260/0x260 [ 59.212579][ T1154] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 59.218377][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.224343][ T1154] ? __kthread_parkme+0x13f/0x1e0 [ 59.229363][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 59.234979][ T1154] kthread+0x388/0x470 [ 59.239030][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.244729][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.250439][ T1154] ret_from_fork+0x24/0x30 [ 59.254852][ T6931] CPU: 0 PID: 6931 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 59.262747][ T6931] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.272821][ T6931] Call Trace: [ 59.276146][ T6931] dump_stack+0x188/0x20d [ 59.280501][ T6931] debug_smp_processor_id.cold+0x88/0x9b [ 59.286141][ T6931] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.291281][ T6931] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.296737][ T6931] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.302445][ T6931] ext4_ext_map_blocks+0x2044/0x3410 [ 59.307817][ T6931] ? ext4_ext_release+0x10/0x10 [ 59.312693][ T6931] ? __down_timeout+0x2d0/0x2d0 [ 59.317546][ T6931] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.323026][ T6931] ext4_map_blocks+0x4cb/0x1640 [ 59.327693][ T1154] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1154 [ 59.327878][ T6931] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.337402][ T1154] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 59.342502][ T6931] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.342519][ T6931] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.342533][ T6931] ? prandom_u32_state+0xe/0x170 [ 59.342550][ T6931] ? __brelse+0x84/0xa0 [ 59.342563][ T6931] ? __ext4_new_inode+0x144/0x57c0 [ 59.342581][ T6931] ext4_getblk+0xad/0x520 [ 59.378383][ T6931] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.384111][ T6931] ? ext4_free_inode+0x17e0/0x17e0 [ 59.389222][ T6931] ext4_bread+0x7c/0x380 [ 59.393470][ T6931] ? ext4_getblk+0x520/0x520 [ 59.398042][ T6931] ? dqget+0xff0/0xff0 [ 59.402120][ T6931] ext4_append+0x153/0x360 [ 59.406531][ T6931] ext4_mkdir+0x5e0/0xdf0 [ 59.411730][ T6931] ? ext4_rmdir+0xde0/0xde0 [ 59.416229][ T6931] ? security_inode_permission+0xc4/0xf0 [ 59.421849][ T6931] vfs_mkdir+0x419/0x690 [ 59.426079][ T6931] do_mkdirat+0x21e/0x280 [ 59.430407][ T6931] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.435250][ T6931] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.441213][ T6931] ? do_syscall_64+0x21/0x7d0 [ 59.445892][ T6931] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.451875][ T6931] do_syscall_64+0xf6/0x7d0 [ 59.456372][ T6931] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.462247][ T6931] RIP: 0033:0x4b02a0 [ 59.466139][ T6931] 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 [ 59.485742][ T6931] RSP: 002b:000000c0000d94b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 59.494133][ T6931] RAX: ffffffffffffffda RBX: 000000c00002e500 RCX: 00000000004b02a0 [ 59.502085][ T6931] RDX: 00000000000001c0 RSI: 000000c00009ef60 RDI: ffffffffffffff9c [ 59.510038][ T6931] RBP: 000000c0000d9510 R08: 0000000000000000 R09: 0000000000000000 [ 59.518040][ T6931] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 59.526030][ T6931] R13: 000000000000007c R14: 000000000000007b R15: 0000000000000100 [ 59.534100][ T1154] CPU: 1 PID: 1154 Comm: khugepaged Not tainted 5.7.0-syzkaller #0 [ 59.542090][ T1154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.552165][ T1154] Call Trace: [ 59.555438][ T1154] dump_stack+0x188/0x20d [ 59.559778][ T1154] debug_smp_processor_id.cold+0x88/0x9b [ 59.565415][ T1154] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.570542][ T1154] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.576017][ T1154] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 59.582291][ T1154] ext4_ext_map_blocks+0x2044/0x3410 [ 59.587571][ T1154] ? ext4_ext_release+0x10/0x10 [ 59.592479][ T1154] ? __down_timeout+0x2d0/0x2d0 [ 59.597325][ T1154] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.602778][ T1154] ext4_map_blocks+0x4cb/0x1640 [ 59.607630][ T1154] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.612818][ T1154] ? debug_smp_processor_id+0x2f/0x185 [ 59.618271][ T1154] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.623808][ T1154] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.629777][ T1154] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 59.635225][ T1154] ext4_writepages+0x1ab7/0x3400 [ 59.640166][ T1154] ? mark_lock+0x30/0xdd0 [ 59.644500][ T1154] ? __ext4_mark_inode_dirty+0x950/0x950 [ 59.650135][ T1154] ? __ext4_mark_inode_dirty+0x950/0x950 [ 59.655746][ T1154] ? do_writepages+0xfa/0x2a0 [ 59.660420][ T1154] do_writepages+0xfa/0x2a0 [ 59.664907][ T1154] ? page_writeback_cpu_online+0x10/0x10 [ 59.670517][ T1154] ? do_raw_spin_lock+0x129/0x2e0 [ 59.675520][ T1154] ? do_raw_spin_unlock+0x171/0x260 [ 59.680697][ T1154] ? _raw_spin_unlock+0x24/0x40 [ 59.685528][ T1154] __filemap_fdatawrite_range+0x2aa/0x390 [ 59.691225][ T1154] ? collapse_file+0x3575/0x4300 [ 59.696152][ T1154] ? delete_from_page_cache_batch+0xec0/0xec0 [ 59.702294][ T1154] ? _raw_spin_unlock_irq+0x1f/0x80 [ 59.707556][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.713585][ T1154] collapse_file+0x357f/0x4300 [ 59.718347][ T1154] ? collapse_huge_page+0x4370/0x4370 [ 59.723701][ T1154] ? khugepaged+0x24fa/0x3f80 [ 59.728472][ T1154] ? hash_netport6_uref+0x228/0x2e0 [ 59.733668][ T1154] khugepaged+0x3049/0x3f80 [ 59.738317][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 59.743940][ T1154] ? lock_downgrade+0x840/0x840 [ 59.748778][ T1154] ? finish_wait+0x260/0x260 [ 59.753367][ T1154] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 59.759607][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.765572][ T1154] ? __kthread_parkme+0x13f/0x1e0 [ 59.770575][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 59.776184][ T1154] kthread+0x388/0x470 [ 59.780274][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.786130][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.791832][ T1154] ret_from_fork+0x24/0x30 [ 59.818355][ T6947] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6947 [ 59.827970][ T6947] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 59.833961][ T6947] CPU: 0 PID: 6947 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.842190][ T6947] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.845145][ T1154] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1154 [ 59.852233][ T6947] Call Trace: [ 59.852256][ T6947] dump_stack+0x188/0x20d [ 59.852274][ T6947] debug_smp_processor_id.cold+0x88/0x9b [ 59.852292][ T6947] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.861929][ T1154] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 59.865179][ T6947] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.865192][ T6947] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.865212][ T6947] ext4_ext_map_blocks+0x2044/0x3410 [ 59.902492][ T6947] ? ext4_ext_release+0x10/0x10 [ 59.907363][ T6947] ? __down_timeout+0x2d0/0x2d0 [ 59.912202][ T6947] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.917649][ T6947] ext4_map_blocks+0x4cb/0x1640 [ 59.922488][ T6947] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.927669][ T6947] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.933212][ T6947] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.939175][ T6947] ? prandom_u32_state+0xe/0x170 [ 59.944120][ T6947] ? __brelse+0x84/0xa0 [ 59.948608][ T6947] ? __ext4_new_inode+0x144/0x57c0 [ 59.953707][ T6947] ext4_getblk+0xad/0x520 [ 59.958032][ T6947] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.963735][ T6947] ? ext4_free_inode+0x17e0/0x17e0 [ 59.968837][ T6947] ext4_bread+0x7c/0x380 [ 59.973063][ T6947] ? ext4_getblk+0x520/0x520 [ 59.977656][ T6947] ? dqget+0xff0/0xff0 [ 59.981712][ T6947] ext4_append+0x153/0x360 [ 59.986118][ T6947] ext4_mkdir+0x5e0/0xdf0 [ 59.990435][ T6947] ? ext4_rmdir+0xde0/0xde0 [ 59.994924][ T6947] ? security_inode_permission+0xc4/0xf0 [ 60.000630][ T6947] vfs_mkdir+0x419/0x690 [ 60.004865][ T6947] do_mkdirat+0x21e/0x280 [ 60.009178][ T6947] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.014021][ T6947] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.020001][ T6947] ? do_syscall_64+0x21/0x7d0 [ 60.024665][ T6947] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.030628][ T6947] do_syscall_64+0xf6/0x7d0 [ 60.035144][ T6947] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 60.041028][ T6947] RIP: 0033:0x45bee7 [ 60.044906][ T6947] 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 [ 60.064502][ T6947] RSP: 002b:00007ffe2e27d868 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 60.072910][ T6947] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 60.080874][ T6947] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffe2e27da40 [ 60.088836][ T6947] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003400 [ 60.096897][ T6947] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 60.104864][ T6947] R13: 00007ffe2e27da40 R14: 8421084210842109 R15: 00007ffe2e27da4c [ 60.112848][ T1154] CPU: 1 PID: 1154 Comm: khugepaged Not tainted 5.7.0-syzkaller #0 [ 60.120757][ T1154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.131019][ T1154] Call Trace: [ 60.134320][ T1154] dump_stack+0x188/0x20d [ 60.139118][ T1154] debug_smp_processor_id.cold+0x88/0x9b [ 60.144765][ T1154] ext4_mb_new_blocks+0xa77/0x3b30 [ 60.149895][ T1154] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.155366][ T1154] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 60.161612][ T1154] ext4_ext_map_blocks+0x2044/0x3410 [ 60.166950][ T1154] ? ext4_ext_release+0x10/0x10 [ 60.171817][ T1154] ? __down_timeout+0x2d0/0x2d0 [ 60.176677][ T1154] ? ext4_es_lookup_extent+0x41d/0xd30 [ 60.182145][ T1154] ext4_map_blocks+0x4cb/0x1640 [ 60.187011][ T1154] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.192210][ T1154] ? debug_smp_processor_id+0x2f/0x185 [ 60.197680][ T1154] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.203233][ T1154] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.209216][ T1154] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 60.214684][ T1154] ext4_writepages+0x1ab7/0x3400 [ 60.219741][ T1154] ? mark_lock+0x30/0xdd0 [ 60.222408][ T6948] IPVS: ftp: loaded support on port[0] = 21 [ 60.224091][ T1154] ? __ext4_mark_inode_dirty+0x950/0x950 [ 60.235598][ T1154] ? __ext4_mark_inode_dirty+0x950/0x950 [ 60.241237][ T1154] ? do_writepages+0xfa/0x2a0 [ 60.245921][ T1154] do_writepages+0xfa/0x2a0 [ 60.250438][ T1154] ? page_writeback_cpu_online+0x10/0x10 [ 60.256194][ T1154] ? do_raw_spin_lock+0x129/0x2e0 [ 60.261229][ T1154] ? do_raw_spin_unlock+0x171/0x260 [ 60.266437][ T1154] ? _raw_spin_unlock+0x24/0x40 [ 60.271299][ T1154] __filemap_fdatawrite_range+0x2aa/0x390 [ 60.276640][ T6948] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6948 [ 60.277022][ T1154] ? collapse_file+0x3575/0x4300 [ 60.286436][ T6948] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 60.291296][ T1154] ? delete_from_page_cache_batch+0xec0/0xec0 [ 60.303217][ T1154] ? _raw_spin_unlock_irq+0x1f/0x80 [ 60.308401][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.314369][ T1154] collapse_file+0x357f/0x4300 [ 60.319144][ T1154] ? collapse_huge_page+0x4370/0x4370 [ 60.324499][ T1154] ? khugepaged+0x24fa/0x3f80 [ 60.329170][ T1154] ? hash_netport6_uref+0x228/0x2e0 [ 60.334352][ T1154] khugepaged+0x3049/0x3f80 [ 60.338867][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 60.344480][ T1154] ? lock_downgrade+0x840/0x840 [ 60.349314][ T1154] ? finish_wait+0x260/0x260 [ 60.353976][ T1154] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 60.359773][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.365744][ T1154] ? __kthread_parkme+0x13f/0x1e0 [ 60.370888][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 60.376514][ T1154] kthread+0x388/0x470 [ 60.380574][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.387347][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.393065][ T1154] ret_from_fork+0x24/0x30 [ 60.397492][ T6948] CPU: 0 PID: 6948 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 60.405830][ T6948] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.415902][ T6948] Call Trace: [ 60.419250][ T6948] dump_stack+0x188/0x20d [ 60.423590][ T6948] debug_smp_processor_id.cold+0x88/0x9b [ 60.429223][ T6948] ext4_mb_new_blocks+0xa77/0x3b30 [ 60.434441][ T6948] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.439904][ T6948] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.445651][ T6948] ext4_ext_map_blocks+0x2044/0x3410 [ 60.450955][ T6948] ? ext4_ext_release+0x10/0x10 [ 60.455840][ T6948] ? __down_timeout+0x2d0/0x2d0 [ 60.460707][ T6948] ? ext4_es_lookup_extent+0x41d/0xd30 [ 60.466174][ T6948] ext4_map_blocks+0x4cb/0x1640 [ 60.471039][ T6948] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.476239][ T6948] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.481802][ T6948] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.487781][ T6948] ? prandom_u32_state+0xe/0x170 [ 60.492728][ T6948] ? __brelse+0x84/0xa0 [ 60.496884][ T6948] ? __ext4_new_inode+0x144/0x57c0 [ 60.501998][ T6948] ext4_getblk+0xad/0x520 [ 60.506417][ T6948] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.512142][ T6948] ? ext4_free_inode+0x17e0/0x17e0 [ 60.517259][ T6948] ext4_bread+0x7c/0x380 [ 60.521492][ T6948] ? ext4_getblk+0x520/0x520 [ 60.526061][ T6948] ? dqget+0xff0/0xff0 [ 60.530110][ T6948] ext4_append+0x153/0x360 [ 60.534508][ T6948] ext4_mkdir+0x5e0/0xdf0 [ 60.538820][ T6948] ? ext4_rmdir+0xde0/0xde0 [ 60.544606][ T6948] ? security_inode_permission+0xc4/0xf0 [ 60.550218][ T6948] vfs_mkdir+0x419/0x690 [ 60.554440][ T6948] do_mkdirat+0x21e/0x280 [ 60.558747][ T6948] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.563592][ T6948] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.569547][ T6948] ? do_syscall_64+0x21/0x7d0 [ 60.574206][ T6948] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.580250][ T6948] do_syscall_64+0xf6/0x7d0 [ 60.584734][ T6948] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 60.590604][ T6948] RIP: 0033:0x45bee7 [ 60.594493][ T6948] 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 [ 60.615386][ T6948] RSP: 002b:00007ffe2e27d758 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 60.623786][ T6948] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 60.631742][ T6948] RDX: 00007ffe2e27d7a3 RSI: 00000000000001ff RDI: 00007ffe2e27d7a0 [ 60.639689][ T6948] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 60.647651][ T6948] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185d0 [ 60.655698][ T6948] R13: 00007ffe2e27d790 R14: 0000000000000000 R15: 00007ffe2e27d7a0 [ 60.716815][ T6948] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6948 [ 60.726478][ T6948] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 60.732530][ T6948] CPU: 0 PID: 6948 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 60.740768][ T6948] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.751168][ T6948] Call Trace: [ 60.754504][ T6948] dump_stack+0x188/0x20d [ 60.758850][ T6948] debug_smp_processor_id.cold+0x88/0x9b [ 60.764489][ T6948] ext4_mb_new_blocks+0xa77/0x3b30 [ 60.769842][ T6948] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.775318][ T6948] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.781061][ T6948] ext4_ext_map_blocks+0x2044/0x3410 [ 60.786348][ T6948] ? ext4_ext_release+0x10/0x10 [ 60.791193][ T6948] ? __down_timeout+0x2d0/0x2d0 [ 60.796057][ T6948] ? ext4_es_lookup_extent+0x41d/0xd30 [ 60.801542][ T6948] ext4_map_blocks+0x4cb/0x1640 [ 60.806663][ T6948] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.812189][ T6948] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.817799][ T6948] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.823763][ T6948] ? prandom_u32_state+0xe/0x170 [ 60.828700][ T6948] ? __brelse+0x84/0xa0 [ 60.832840][ T6948] ? __ext4_new_inode+0x144/0x57c0 [ 60.837927][ T6948] ext4_getblk+0xad/0x520 [ 60.842242][ T6948] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.847942][ T6948] ? ext4_free_inode+0x17e0/0x17e0 [ 60.853052][ T6948] ext4_bread+0x7c/0x380 [ 60.857272][ T6948] ? ext4_getblk+0x520/0x520 [ 60.861852][ T6948] ? dqget+0xff0/0xff0 [ 60.865903][ T6948] ext4_append+0x153/0x360 [ 60.870297][ T6948] ext4_mkdir+0x5e0/0xdf0 [ 60.874606][ T6948] ? ext4_rmdir+0xde0/0xde0 [ 60.879102][ T6948] ? security_inode_permission+0xc4/0xf0 [ 60.884979][ T6948] vfs_mkdir+0x419/0x690 [ 60.889200][ T6948] do_mkdirat+0x21e/0x280 [ 60.893525][ T6948] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.898364][ T6948] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.904332][ T6948] ? do_syscall_64+0x21/0x7d0 [ 60.908984][ T6948] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.914947][ T6948] do_syscall_64+0xf6/0x7d0 [ 60.919429][ T6948] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 60.925318][ T6948] RIP: 0033:0x45bee7 [ 60.929206][ T6948] 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 [ 60.948795][ T6948] RSP: 002b:00007ffe2e27d758 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 60.958166][ T6948] RAX: ffffffffffffffda RBX: 000000000000ed21 RCX: 000000000045bee7 2020/06/13 03:38:30 building call list... [ 60.966127][ T6948] RDX: 00007ffe2e27d7a3 RSI: 00000000000001ff RDI: 00007ffe2e27d7a0 [ 60.974161][ T6948] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 60.982119][ T6948] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 60.990079][ T6948] R13: 00007ffe2e27d790 R14: 000000000000ed16 R15: 00007ffe2e27d7a0 [ 61.331363][ T21] tipc: TX() has been purged, node left! executing program [ 62.707904][ T6931] can: request_module (can-proto-0) failed. [ 63.276197][ T6931] can: request_module (can-proto-0) failed. [ 63.288005][ T6931] can: request_module (can-proto-0) failed.