Starting Load/Save RF Kill Switch Status... [ 55.477728][ T6746] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6746 [ 55.487606][ T6746] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 55.496350][ T6746] CPU: 0 PID: 6746 Comm: systemd-rfkill Not tainted 5.7.0-syzkaller #0 [ 55.504594][ T6746] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.515249][ T6746] Call Trace: [ 55.518528][ T6746] dump_stack+0x18f/0x20d [ 55.522856][ T6746] check_preemption_disabled+0x20d/0x220 [ 55.529597][ T6746] ext4_mb_new_blocks+0xa4d/0x3b70 [ 55.534717][ T6746] ? ext4_ext_search_right+0x2ca/0xb20 [ 55.540174][ T6746] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 55.545900][ T6746] ext4_ext_map_blocks+0x201b/0x33e0 [ 55.551190][ T6746] ? ext4_ext_release+0x10/0x10 [ 55.556315][ T6746] ? down_write_killable+0x170/0x170 [ 55.561612][ T6746] ? ext4_es_lookup_extent+0x41d/0xd10 [ 55.567085][ T6746] ext4_map_blocks+0x4cb/0x1640 [ 55.571941][ T6746] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 55.577119][ T6746] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 55.583271][ T6746] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 55.589235][ T6746] ? prandom_u32_state+0xe/0x170 [ 55.594165][ T6746] ? __brelse+0x84/0xa0 [ 55.598412][ T6746] ? __ext4_new_inode+0x144/0x55e0 [ 55.604124][ T6746] ext4_getblk+0xad/0x520 [ 55.608452][ T6746] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 55.614249][ T6746] ? ext4_free_inode+0x1700/0x1700 [ 55.619533][ T6746] ext4_bread+0x7c/0x380 [ 55.624124][ T6746] ? ext4_getblk+0x520/0x520 [ 55.628789][ T6746] ? dquot_get_next_dqblk+0x180/0x180 [ 55.634146][ T6746] ext4_append+0x153/0x360 [ 55.639084][ T6746] ext4_mkdir+0x5e0/0xdf0 [ 55.643434][ T6746] ? ext4_rmdir+0xde0/0xde0 [ 55.647928][ T6746] ? security_inode_permission+0xc4/0xf0 [ 55.653607][ T6746] vfs_mkdir+0x419/0x690 [ 55.658005][ T6746] do_mkdirat+0x21e/0x280 [ 55.662349][ T6746] ? __ia32_sys_mknod+0xb0/0xb0 [ 55.667829][ T6746] ? do_syscall_64+0x1c/0xe0 [ 55.672409][ T6746] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 55.678410][ T6746] do_syscall_64+0x60/0xe0 [ 55.683420][ T6746] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 55.689810][ T6746] RIP: 0033:0x7f1e535ce687 [ 55.694200][ T6746] Code: Bad RIP value. [ 55.698253][ T6746] RSP: 002b:00007ffdc0bd1288 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 55.706664][ T6746] RAX: ffffffffffffffda RBX: 000055dfe3c2a985 RCX: 00007f1e535ce687 [ 55.715089][ T6746] RDX: 00007ffdc0bd1150 RSI: 00000000000001ed RDI: 000055dfe3c2a985 [ 55.723053][ T6746] RBP: 00007f1e535ce680 R08: 0000000000000100 R09: 0000000000000000 [ 55.732282][ T6746] R10: 000055dfe3c2a980 R11: 0000000000000246 R12: 00000000000001ed [ 55.740723][ T6746] R13: 00007ffdc0bd1410 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 59.758557][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 59.767800][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.773898][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 59.781705][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.791832][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 59.797812][ T7] Call Trace: [ 59.801285][ T7] dump_stack+0x18f/0x20d [ 59.805609][ T7] check_preemption_disabled+0x20d/0x220 [ 59.811373][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.816483][ T7] ? ext4_find_extent+0x81a/0xad0 [ 59.821684][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.827152][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.832900][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.838196][ T7] ? ext4_ext_release+0x10/0x10 [ 59.843476][ T7] ? down_write_killable+0x170/0x170 [ 59.848749][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.854201][ T7] ext4_map_blocks+0x4cb/0x1640 [ 59.859036][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.864235][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.869780][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.876000][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 59.881549][ T7] ext4_writepages+0x1a7b/0x33c0 [ 59.886477][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 59.892209][ T7] ? __lock_acquire+0x2224/0x48b0 [ 59.897538][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 59.903519][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 59.909486][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 59.915465][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 59.921085][ T7] ? do_writepages+0xfa/0x2a0 [ 59.925743][ T7] do_writepages+0xfa/0x2a0 [ 59.930229][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 59.935860][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.942877][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.948834][ T7] ? lock_downgrade+0x840/0x840 [ 59.953674][ T7] __writeback_single_inode+0x12a/0x13d0 [ 59.959459][ T7] ? _raw_spin_unlock+0x24/0x40 [ 59.964309][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 59.970386][ T7] writeback_sb_inodes+0x515/0xdc0 [ 59.975491][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 59.981725][ T7] __writeback_inodes_wb+0xc3/0x250 [ 59.986927][ T7] wb_writeback+0x8db/0xd50 [ 59.991426][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 59.997752][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 60.003886][ T7] ? cpumask_next+0x3c/0x40 [ 60.008365][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 60.013546][ T7] wb_workfn+0xab3/0x1090 [ 60.017868][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 60.023424][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.029032][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.034997][ T7] process_one_work+0x965/0x1690 [ 60.039919][ T7] ? lock_release+0x800/0x800 [ 60.044578][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 60.050017][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 60.060661][ T7] worker_thread+0x96/0xe10 [ 60.065165][ T7] ? process_one_work+0x1690/0x1690 [ 60.070405][ T7] kthread+0x3b5/0x4a0 [ 60.074465][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.080248][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.086038][ T7] ret_from_fork+0x1f/0x30 [ 60.093181][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 60.102429][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.108446][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 60.116240][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.126295][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 60.132253][ T7] Call Trace: [ 60.135525][ T7] dump_stack+0x18f/0x20d [ 60.139925][ T7] check_preemption_disabled+0x20d/0x220 [ 60.145532][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.150622][ T7] ? ext4_find_extent+0x81a/0xad0 [ 60.155653][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.161202][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.168367][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.173656][ T7] ? ext4_ext_release+0x10/0x10 [ 60.178711][ T7] ? down_write_killable+0x170/0x170 [ 60.184008][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.189467][ T7] ext4_map_blocks+0x4cb/0x1640 [ 60.194417][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.199622][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.205165][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.211148][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 60.218075][ T7] ext4_writepages+0x1a7b/0x33c0 [ 60.223364][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.228991][ T7] ? __lock_acquire+0x2224/0x48b0 [ 60.234016][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 60.240520][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 60.246501][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.254218][ T7] ? do_writepages+0xfa/0x2a0 [ 60.258887][ T7] do_writepages+0xfa/0x2a0 [ 60.263397][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 60.269026][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.274946][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.281130][ T7] ? lock_downgrade+0x840/0x840 [ 60.285983][ T7] __writeback_single_inode+0x12a/0x13d0 [ 60.291802][ T7] ? _raw_spin_unlock+0x24/0x40 [ 60.296823][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 60.302906][ T7] writeback_sb_inodes+0x515/0xdc0 [ 60.308023][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 60.313921][ T7] __writeback_inodes_wb+0xc3/0x250 [ 60.319103][ T7] wb_writeback+0x8db/0xd50 [ 60.323601][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 60.330012][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 60.336042][ T7] ? cpumask_next+0x3c/0x40 [ 60.340530][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 60.345737][ T7] wb_workfn+0xab3/0x1090 [ 60.350152][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 60.355692][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.361301][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.367283][ T7] process_one_work+0x965/0x1690 [ 60.372204][ T7] ? lock_release+0x800/0x800 [ 60.377234][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 60.382606][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 60.387544][ T7] worker_thread+0x96/0xe10 [ 60.392036][ T7] ? process_one_work+0x1690/0x1690 [ 60.397221][ T7] kthread+0x3b5/0x4a0 [ 60.401282][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.407064][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.412763][ T7] ret_from_fork+0x1f/0x30 [ 60.427468][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 60.438433][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.444351][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 60.452156][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.462262][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 60.468249][ T7] Call Trace: [ 60.471592][ T7] dump_stack+0x18f/0x20d [ 60.475944][ T7] check_preemption_disabled+0x20d/0x220 [ 60.481596][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.486810][ T7] ? ext4_find_extent+0x81a/0xad0 [ 60.491865][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.497347][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.503183][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.508507][ T7] ? ext4_ext_release+0x10/0x10 [ 60.513388][ T7] ? down_write_killable+0x170/0x170 [ 60.518924][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.524724][ T7] ext4_map_blocks+0x4cb/0x1640 [ 60.529565][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.534934][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.541507][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.547471][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 60.553021][ T7] ext4_writepages+0x1a7b/0x33c0 [ 60.557974][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.563607][ T7] ? __lock_acquire+0x2224/0x48b0 [ 60.568646][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 60.574666][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 60.580841][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.586488][ T7] ? do_writepages+0xfa/0x2a0 [ 60.591291][ T7] do_writepages+0xfa/0x2a0 [ 60.595805][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 60.601453][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.607009][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.612988][ T7] ? lock_downgrade+0x840/0x840 [ 60.617842][ T7] __writeback_single_inode+0x12a/0x13d0 [ 60.623474][ T7] ? _raw_spin_unlock+0x24/0x40 [ 60.628326][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 60.634308][ T7] writeback_sb_inodes+0x515/0xdc0 [ 60.639412][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 60.645303][ T7] __writeback_inodes_wb+0xc3/0x250 [ 60.650492][ T7] wb_writeback+0x8db/0xd50 [ 60.654999][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 60.661312][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 60.667191][ T7] ? cpumask_next+0x3c/0x40 [ 60.671691][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 60.676890][ T7] wb_workfn+0xab3/0x1090 [ 60.681209][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 60.686743][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.692294][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.698263][ T7] process_one_work+0x965/0x1690 [ 60.703191][ T7] ? lock_release+0x800/0x800 [ 60.707874][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 60.713233][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 60.718180][ T7] worker_thread+0x96/0xe10 [ 60.722683][ T7] ? process_one_work+0x1690/0x1690 [ 60.727883][ T7] kthread+0x3b5/0x4a0 [ 60.732094][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.737944][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.743675][ T7] ret_from_fork+0x1f/0x30 [ 60.750899][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 60.759966][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.765875][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 60.773677][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.783751][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 60.789731][ T7] Call Trace: [ 60.793006][ T7] dump_stack+0x18f/0x20d [ 60.797323][ T7] check_preemption_disabled+0x20d/0x220 [ 60.802941][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.808066][ T7] ? ext4_find_extent+0x81a/0xad0 [ 60.813089][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.818531][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.824259][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.829551][ T7] ? ext4_ext_release+0x10/0x10 [ 60.834399][ T7] ? down_write_killable+0x170/0x170 [ 60.839665][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.845114][ T7] ext4_map_blocks+0x4cb/0x1640 [ 60.850128][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.855337][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.860881][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.866847][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 60.872292][ T7] ext4_writepages+0x1a7b/0x33c0 [ 60.877229][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.882849][ T7] ? __lock_acquire+0x2224/0x48b0 [ 60.887875][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 60.893845][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 60.899825][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.906051][ T7] ? do_writepages+0xfa/0x2a0 [ 60.910707][ T7] do_writepages+0xfa/0x2a0 [ 60.915204][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 60.920823][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.926351][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.932310][ T7] ? lock_downgrade+0x840/0x840 [ 60.937148][ T7] __writeback_single_inode+0x12a/0x13d0 [ 60.942879][ T7] ? _raw_spin_unlock+0x24/0x40 [ 60.947722][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 60.953773][ T7] writeback_sb_inodes+0x515/0xdc0 [ 60.958876][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 60.964767][ T7] __writeback_inodes_wb+0xc3/0x250 [ 60.969954][ T7] wb_writeback+0x8db/0xd50 [ 60.974543][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 60.980859][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 60.987973][ T7] ? cpumask_next+0x3c/0x40 [ 60.992893][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 60.998078][ T7] wb_workfn+0xab3/0x1090 [ 61.002401][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 61.007945][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.013823][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.019790][ T7] process_one_work+0x965/0x1690 [ 61.024717][ T7] ? lock_release+0x800/0x800 [ 61.029401][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.034758][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 61.039694][ T7] worker_thread+0x96/0xe10 [ 61.044193][ T7] ? process_one_work+0x1690/0x1690 [ 61.049385][ T7] kthread+0x3b5/0x4a0 [ 61.053448][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.059241][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.064956][ T7] ret_from_fork+0x1f/0x30 [ 61.071098][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 61.080226][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.086132][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 61.093934][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.104007][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 61.110002][ T7] Call Trace: [ 61.113300][ T7] dump_stack+0x18f/0x20d [ 61.117638][ T7] check_preemption_disabled+0x20d/0x220 [ 61.123451][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.128584][ T7] ? ext4_find_extent+0x81a/0xad0 [ 61.133649][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.139103][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 61.145175][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.150447][ T7] ? ext4_ext_release+0x10/0x10 [ 61.155291][ T7] ? down_write_killable+0x170/0x170 [ 61.160585][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.166033][ T7] ext4_map_blocks+0x4cb/0x1640 [ 61.170889][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.176160][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.181701][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.187674][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 61.193294][ T7] ext4_writepages+0x1a7b/0x33c0 [ 61.198241][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.203853][ T7] ? __lock_acquire+0x2224/0x48b0 [ 61.209233][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 61.215207][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 61.221199][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.226913][ T7] ? do_writepages+0xfa/0x2a0 [ 61.231588][ T7] do_writepages+0xfa/0x2a0 [ 61.236082][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 61.241733][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.247270][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.253233][ T7] ? lock_downgrade+0x840/0x840 [ 61.258071][ T7] __writeback_single_inode+0x12a/0x13d0 [ 61.263686][ T7] ? _raw_spin_unlock+0x24/0x40 [ 61.268533][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 61.274504][ T7] writeback_sb_inodes+0x515/0xdc0 [ 61.279606][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 61.285495][ T7] __writeback_inodes_wb+0xc3/0x250 [ 61.290698][ T7] wb_writeback+0x8db/0xd50 [ 61.295282][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 61.301603][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 61.307580][ T7] ? cpumask_next+0x3c/0x40 [ 61.312064][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 61.317334][ T7] wb_workfn+0xab3/0x1090 [ 61.321671][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 61.327205][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.332744][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.338720][ T7] process_one_work+0x965/0x1690 [ 61.343658][ T7] ? lock_release+0x800/0x800 [ 61.348318][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.353673][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 61.358604][ T7] worker_thread+0x96/0xe10 [ 61.363208][ T7] ? process_one_work+0x1690/0x1690 [ 61.368390][ T7] kthread+0x3b5/0x4a0 [ 61.373657][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.379383][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.385096][ T7] ret_from_fork+0x1f/0x30 [ 61.396310][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 61.405403][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.411400][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 61.419637][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.429969][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 61.435958][ T7] Call Trace: [ 61.439238][ T7] dump_stack+0x18f/0x20d [ 61.443555][ T7] check_preemption_disabled+0x20d/0x220 [ 61.450037][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.455303][ T7] ? ext4_find_extent+0x81a/0xad0 [ 61.460339][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.465778][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 61.471496][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.476780][ T7] ? ext4_ext_release+0x10/0x10 [ 61.481626][ T7] ? down_write_killable+0x170/0x170 [ 61.486899][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.492365][ T7] ext4_map_blocks+0x4cb/0x1640 [ 61.497205][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.503084][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.509046][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.515018][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 61.520479][ T7] ext4_writepages+0x1a7b/0x33c0 [ 61.526111][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.531724][ T7] ? __lock_acquire+0x2224/0x48b0 [ 61.536739][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 61.542705][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 61.548669][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.554283][ T7] ? do_writepages+0xfa/0x2a0 [ 61.558939][ T7] do_writepages+0xfa/0x2a0 [ 61.563428][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 61.569047][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.574662][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.580622][ T7] ? lock_downgrade+0x840/0x840 [ 61.585744][ T7] __writeback_single_inode+0x12a/0x13d0 [ 61.591779][ T7] ? _raw_spin_unlock+0x24/0x40 [ 61.596711][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 61.602685][ T7] writeback_sb_inodes+0x515/0xdc0 [ 61.607805][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 61.614651][ T7] __writeback_inodes_wb+0xc3/0x250 [ 61.619837][ T7] wb_writeback+0x8db/0xd50 [ 61.624417][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 61.630752][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 61.636628][ T7] ? cpumask_next+0x3c/0x40 [ 61.641548][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 61.646732][ T7] wb_workfn+0xab3/0x1090 [ 61.651065][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 61.656612][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.662149][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.668723][ T7] process_one_work+0x965/0x1690 [ 61.673649][ T7] ? lock_release+0x800/0x800 [ 61.678327][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.683943][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 61.688955][ T7] worker_thread+0x96/0xe10 [ 61.694667][ T7] ? process_one_work+0x1690/0x1690 [ 61.700470][ T7] kthread+0x3b5/0x4a0 [ 61.704647][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.710459][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.716306][ T7] ret_from_fork+0x1f/0x30 [ 61.752189][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 61.761612][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.768086][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 61.775889][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.786040][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 61.792090][ T7] Call Trace: [ 61.795425][ T7] dump_stack+0x18f/0x20d [ 61.800022][ T7] check_preemption_disabled+0x20d/0x220 [ 61.805764][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.810877][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.816323][ T7] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 61.822546][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.828168][ T7] ? ext4_ext_release+0x10/0x10 [ 61.833278][ T7] ? down_write_killable+0x170/0x170 [ 61.838649][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.844315][ T7] ext4_map_blocks+0x4cb/0x1640 [ 61.849177][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.854729][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.860547][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.866595][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 61.872474][ T7] ext4_writepages+0x1a7b/0x33c0 [ 61.877781][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.883411][ T7] ? __lock_acquire+0x2224/0x48b0 [ 61.888461][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 61.894426][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.900215][ T7] ? do_writepages+0xfa/0x2a0 [ 61.904972][ T7] do_writepages+0xfa/0x2a0 [ 61.909550][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 61.915699][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.921406][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.927476][ T7] ? lock_downgrade+0x840/0x840 [ 61.932341][ T7] __writeback_single_inode+0x12a/0x13d0 [ 61.938081][ T7] ? _raw_spin_unlock+0x24/0x40 [ 61.942914][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 61.948886][ T7] writeback_sb_inodes+0x515/0xdc0 [ 61.953989][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 61.959877][ T7] __writeback_inodes_wb+0xc3/0x250 [ 61.965070][ T7] wb_writeback+0x8db/0xd50 [ 61.969563][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 61.975878][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 61.981755][ T7] ? cpumask_next+0x3c/0x40 [ 61.986242][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 61.991435][ T7] wb_workfn+0xab3/0x1090 [ 61.995762][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 62.001446][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.007172][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.013186][ T7] process_one_work+0x965/0x1690 [ 62.018259][ T7] ? lock_release+0x800/0x800 [ 62.022925][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.028302][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 62.033593][ T7] worker_thread+0x96/0xe10 [ 62.038109][ T7] ? process_one_work+0x1690/0x1690 [ 62.043464][ T7] kthread+0x3b5/0x4a0 [ 62.047530][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 Warning: Permanently added '10.128.10.27' (ECDSA) to the list of known hosts. [ 62.053662][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.059667][ T7] ret_from_fork+0x1f/0x30 [ 62.106256][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 62.115892][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 62.121966][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 62.129860][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.140446][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 62.146986][ T7] Call Trace: [ 62.150366][ T7] dump_stack+0x18f/0x20d [ 62.154680][ T7] check_preemption_disabled+0x20d/0x220 [ 62.160657][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 62.165792][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 62.171244][ T7] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 62.177393][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 62.182675][ T7] ? ext4_ext_release+0x10/0x10 [ 62.187525][ T7] ? down_write_killable+0x170/0x170 [ 62.192883][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 62.198359][ T7] ext4_map_blocks+0x4cb/0x1640 [ 62.203292][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 62.208483][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.214012][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.219996][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 62.225438][ T7] ext4_writepages+0x1a7b/0x33c0 [ 62.230370][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 62.235993][ T7] ? __lock_acquire+0x2224/0x48b0 [ 62.241009][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 62.247599][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 62.253587][ T7] ? do_writepages+0xfa/0x2a0 [ 62.258244][ T7] do_writepages+0xfa/0x2a0 [ 62.262743][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 62.268365][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.273985][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.280466][ T7] ? lock_downgrade+0x840/0x840 [ 62.285507][ T7] __writeback_single_inode+0x12a/0x13d0 [ 62.291152][ T7] ? _raw_spin_unlock+0x24/0x40 [ 62.296082][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 62.302059][ T7] writeback_sb_inodes+0x515/0xdc0 [ 62.307255][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 62.313255][ T7] __writeback_inodes_wb+0xc3/0x250 [ 62.318443][ T7] wb_writeback+0x8db/0xd50 [ 62.322938][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 62.329250][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 62.335126][ T7] ? cpumask_next+0x3c/0x40 [ 62.339625][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 62.344932][ T7] wb_workfn+0xab3/0x1090 [ 62.349376][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 62.354926][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.360817][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.366784][ T7] process_one_work+0x965/0x1690 [ 62.371719][ T7] ? lock_release+0x800/0x800 [ 62.376482][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.381840][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 62.386770][ T7] worker_thread+0x96/0xe10 [ 62.392391][ T7] ? process_one_work+0x1690/0x1690 [ 62.397711][ T7] kthread+0x3b5/0x4a0 [ 62.402031][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.407745][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.413622][ T7] ret_from_fork+0x1f/0x30 [ 62.427942][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 62.437694][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 62.443821][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 62.451629][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.461698][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 62.467678][ T7] Call Trace: [ 62.470984][ T7] dump_stack+0x18f/0x20d [ 62.475329][ T7] check_preemption_disabled+0x20d/0x220 [ 62.480970][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 62.486289][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 62.492195][ T7] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 62.498373][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 62.503681][ T7] ? ext4_ext_release+0x10/0x10 [ 62.508652][ T7] ? down_write_killable+0x170/0x170 [ 62.513953][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 62.519517][ T7] ext4_map_blocks+0x4cb/0x1640 [ 62.524383][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 62.529601][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.535174][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.541253][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 62.547193][ T7] ext4_writepages+0x1a7b/0x33c0 [ 62.552408][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 62.558554][ T7] ? __lock_acquire+0x2224/0x48b0 [ 62.563593][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 62.569562][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 62.575815][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 62.581621][ T7] ? do_writepages+0xfa/0x2a0 [ 62.586290][ T7] do_writepages+0xfa/0x2a0 [ 62.590951][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 62.596670][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.602198][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.608243][ T7] ? lock_downgrade+0x840/0x840 [ 62.613076][ T7] __writeback_single_inode+0x12a/0x13d0 [ 62.618894][ T7] ? _raw_spin_unlock+0x24/0x40 [ 62.624009][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 62.630019][ T7] writeback_sb_inodes+0x515/0xdc0 [ 62.635223][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 62.641132][ T7] __writeback_inodes_wb+0xc3/0x250 [ 62.646324][ T7] wb_writeback+0x8db/0xd50 [ 62.650814][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 62.657131][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 62.663110][ T7] ? cpumask_next+0x3c/0x40 [ 62.667610][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 62.672798][ T7] wb_workfn+0xab3/0x1090 [ 62.677197][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 62.682824][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.688347][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.694309][ T7] process_one_work+0x965/0x1690 [ 62.699242][ T7] ? lock_release+0x800/0x800 [ 62.703895][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.709259][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 62.714190][ T7] worker_thread+0x96/0xe10 [ 62.718703][ T7] ? process_one_work+0x1690/0x1690 [ 62.723911][ T7] kthread+0x3b5/0x4a0 [ 62.728127][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.733831][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.739548][ T7] ret_from_fork+0x1f/0x30 2020/06/14 05:04:07 fuzzer started 2020/06/14 05:04:07 connecting to host at 10.128.0.26:43439 2020/06/14 05:04:07 checking machine... 2020/06/14 05:04:07 checking revisions... 2020/06/14 05:04:07 testing simple program... [ 63.296487][ T6822] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6822 [ 63.306135][ T6822] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.312118][ T6822] CPU: 1 PID: 6822 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 63.320021][ T6822] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.330435][ T6822] Call Trace: [ 63.333707][ T6822] dump_stack+0x18f/0x20d [ 63.338027][ T6822] check_preemption_disabled+0x20d/0x220 [ 63.343655][ T6822] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.348842][ T6822] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.354289][ T6822] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.359988][ T6822] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.365380][ T6822] ? ext4_ext_release+0x10/0x10 [ 63.370219][ T6822] ? down_write_killable+0x170/0x170 [ 63.375478][ T6822] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.380917][ T6822] ext4_map_blocks+0x4cb/0x1640 [ 63.385760][ T6822] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.390948][ T6822] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.396468][ T6822] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.402426][ T6822] ? prandom_u32_state+0xe/0x170 [ 63.407692][ T6822] ? __brelse+0x84/0xa0 [ 63.411837][ T6822] ? __ext4_new_inode+0x144/0x55e0 [ 63.416928][ T6822] ext4_getblk+0xad/0x520 [ 63.421233][ T6822] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 63.426942][ T6822] ? ext4_free_inode+0x1700/0x1700 [ 63.432041][ T6822] ext4_bread+0x7c/0x380 [ 63.439482][ T6822] ? ext4_getblk+0x520/0x520 [ 63.444049][ T6822] ? dquot_get_next_dqblk+0x180/0x180 [ 63.449413][ T6822] ext4_append+0x153/0x360 [ 63.453828][ T6822] ext4_mkdir+0x5e0/0xdf0 [ 63.458224][ T6822] ? ext4_rmdir+0xde0/0xde0 [ 63.462717][ T6822] ? security_inode_permission+0xc4/0xf0 [ 63.468343][ T6822] vfs_mkdir+0x419/0x690 [ 63.472579][ T6822] do_mkdirat+0x21e/0x280 [ 63.476908][ T6822] ? __ia32_sys_mknod+0xb0/0xb0 [ 63.481924][ T6822] ? do_syscall_64+0x1c/0xe0 [ 63.486498][ T6822] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.492539][ T6822] do_syscall_64+0x60/0xe0 [ 63.497589][ T6822] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.503469][ T6822] RIP: 0033:0x4b02a0 [ 63.507345][ T6822] Code: Bad RIP value. [ 63.511389][ T6822] RSP: 002b:000000c00004f4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 63.519772][ T6822] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 63.528262][ T6822] RDX: 00000000000001c0 RSI: 000000c00009c9e0 RDI: ffffffffffffff9c [ 63.536338][ T6822] RBP: 000000c00004f510 R08: 0000000000000000 R09: 0000000000000000 [ 63.544316][ T6822] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 63.552284][ T6822] R13: 0000000000000050 R14: 000000000000004f R15: 0000000000000100 [ 63.653615][ T6835] IPVS: ftp: loaded support on port[0] = 21 2020/06/14 05:04:08 building call list... [ 64.016840][ T219] tipc: TX() has been purged, node left! [ 64.529100][ T219] ================================================================== [ 64.537341][ T219] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 64.545504][ T219] Write of size 1 at addr ffff8880922079e4 by task kworker/u4:5/219 [ 64.553499][ T219] [ 64.555975][ T219] CPU: 0 PID: 219 Comm: kworker/u4:5 Not tainted 5.7.0-syzkaller #0 [ 64.563951][ T219] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.574013][ T219] Workqueue: netns cleanup_net [ 64.578768][ T219] Call Trace: [ 64.582062][ T219] dump_stack+0x18f/0x20d [ 64.586575][ T219] ? afs_wake_up_async_call+0x6aa/0x770 [ 64.592148][ T219] ? afs_wake_up_async_call+0x6aa/0x770 [ 64.597688][ T219] ? afs_put_call+0xa40/0xa40 [ 64.602363][ T219] print_address_description.constprop.0.cold+0xd3/0x413 [ 64.609419][ T219] ? vprintk_func+0x97/0x1a6 [ 64.614022][ T219] ? afs_wake_up_async_call+0x6aa/0x770 [ 64.619675][ T219] kasan_report.cold+0x1f/0x37 [ 64.624466][ T219] ? rcu_read_lock_held+0x81/0xb0 [ 64.629486][ T219] ? afs_wake_up_async_call+0x6aa/0x770 [ 64.635031][ T219] afs_wake_up_async_call+0x6aa/0x770 [ 64.640497][ T219] ? afs_close_socket+0x320/0x320 [ 64.645520][ T219] ? afs_put_call+0xa40/0xa40 [ 64.650203][ T219] rxrpc_notify_socket+0x1db/0x5d0 [ 64.655348][ T219] ? afs_put_call+0xa40/0xa40 [ 64.660048][ T219] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 64.666597][ T219] rxrpc_call_completed+0xca/0xf0 [ 64.671747][ T219] rxrpc_discard_prealloc+0x781/0xab0 [ 64.677137][ T219] ? lock_sock_nested+0x94/0x110 [ 64.682085][ T219] rxrpc_listen+0x147/0x360 [ 64.687203][ T219] afs_close_socket+0x95/0x320 [ 64.691964][ T219] ? afs_purge_servers+0x16d/0x300 [ 64.697074][ T219] ? afs_rx_discard_new_call+0x50/0x50 [ 64.702536][ T219] ? init_wait_var_entry+0x200/0x200 [ 64.707830][ T219] ? rcu_read_lock_held_common+0xa0/0xa0 [ 64.713464][ T219] ? check_preemption_disabled+0x38/0x220 [ 64.719214][ T219] afs_net_exit+0x1bc/0x310 [ 64.723748][ T219] ? afs_net_init+0xe30/0xe30 [ 64.728513][ T219] ops_exit_list.isra.0+0xa8/0x150 [ 64.733633][ T219] cleanup_net+0x511/0xa50 [ 64.738122][ T219] ? unregister_pernet_device+0x70/0x70 [ 64.743926][ T219] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.749935][ T219] process_one_work+0x965/0x1690 [ 64.754971][ T219] ? lock_release+0x800/0x800 [ 64.759861][ T219] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.765245][ T219] ? rwlock_bug.part.0+0x90/0x90 [ 64.770284][ T219] worker_thread+0x96/0xe10 [ 64.774800][ T219] ? process_one_work+0x1690/0x1690 [ 64.780004][ T219] kthread+0x3b5/0x4a0 [ 64.784074][ T219] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.789876][ T219] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.795774][ T219] ret_from_fork+0x1f/0x30 [ 64.800218][ T219] [ 64.802665][ T219] Allocated by task 6835: [ 64.807007][ T219] save_stack+0x1b/0x40 [ 64.811167][ T219] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 64.816805][ T219] kmem_cache_alloc_trace+0x153/0x7d0 [ 64.822283][ T219] afs_alloc_call+0x55/0x630 [ 64.826973][ T219] afs_charge_preallocation+0xe9/0x2d0 [ 64.833389][ T219] afs_open_socket+0x292/0x360 [ 64.838151][ T219] afs_net_init+0xa6c/0xe30 [ 64.842661][ T219] ops_init+0xaf/0x420 [ 64.846824][ T219] setup_net+0x2de/0x860 [ 64.851063][ T219] copy_net_ns+0x293/0x590 [ 64.855501][ T219] create_new_namespaces+0x3fb/0xb30 [ 64.860799][ T219] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 64.866464][ T219] ksys_unshare+0x43d/0x8e0 [ 64.870974][ T219] __x64_sys_unshare+0x2d/0x40 [ 64.875736][ T219] do_syscall_64+0x60/0xe0 [ 64.880152][ T219] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.886030][ T219] [ 64.888352][ T219] Freed by task 219: [ 64.892350][ T219] save_stack+0x1b/0x40 [ 64.896511][ T219] __kasan_slab_free+0xf7/0x140 [ 64.901355][ T219] kfree+0x109/0x2b0 [ 64.905252][ T219] afs_put_call+0x585/0xa40 [ 64.909759][ T219] rxrpc_discard_prealloc+0x764/0xab0 [ 64.915312][ T219] rxrpc_listen+0x147/0x360 [ 64.919810][ T219] afs_close_socket+0x95/0x320 [ 64.924572][ T219] afs_net_exit+0x1bc/0x310 [ 64.929160][ T219] ops_exit_list.isra.0+0xa8/0x150 [ 64.934811][ T219] cleanup_net+0x511/0xa50 [ 64.939253][ T219] process_one_work+0x965/0x1690 [ 64.944190][ T219] worker_thread+0x96/0xe10 [ 64.948690][ T219] kthread+0x3b5/0x4a0 [ 64.953277][ T219] ret_from_fork+0x1f/0x30 [ 64.957681][ T219] [ 64.960006][ T219] The buggy address belongs to the object at ffff888092207800 [ 64.960006][ T219] which belongs to the cache kmalloc-1k of size 1024 [ 64.974230][ T219] The buggy address is located 484 bytes inside of [ 64.974230][ T219] 1024-byte region [ffff888092207800, ffff888092207c00) [ 64.988798][ T219] The buggy address belongs to the page: [ 64.994527][ T219] page:ffffea00024881c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 65.003632][ T219] flags: 0xfffe0000000200(slab) [ 65.008574][ T219] raw: 00fffe0000000200 ffffea0002552288 ffffea0002a054c8 ffff8880aa000c40 [ 65.017158][ T219] raw: 0000000000000000 ffff888092207000 0000000100000002 0000000000000000 [ 65.026275][ T219] page dumped because: kasan: bad access detected [ 65.032684][ T219] [ 65.035007][ T219] Memory state around the buggy address: [ 65.040639][ T219] ffff888092207880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.048705][ T219] ffff888092207900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.056860][ T219] >ffff888092207980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.065019][ T219] ^ [ 65.072211][ T219] ffff888092207a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.080297][ T219] ffff888092207a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.088349][ T219] ================================================================== [ 65.096515][ T219] Disabling lock debugging due to kernel taint [ 65.102725][ T219] Kernel panic - not syncing: panic_on_warn set ... [ 65.109309][ T219] CPU: 0 PID: 219 Comm: kworker/u4:5 Tainted: G B 5.7.0-syzkaller #0 [ 65.119094][ T219] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.129149][ T219] Workqueue: netns cleanup_net [ 65.133898][ T219] Call Trace: [ 65.137271][ T219] dump_stack+0x18f/0x20d [ 65.141599][ T219] ? afs_wake_up_async_call+0x5f0/0x770 [ 65.147131][ T219] ? afs_put_call+0xa40/0xa40 [ 65.151805][ T219] panic+0x2e3/0x75c [ 65.155783][ T219] ? __warn_printk+0xf3/0xf3 [ 65.160453][ T219] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 65.166603][ T219] ? trace_hardirqs_on+0x55/0x220 [ 65.171627][ T219] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.177163][ T219] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.182786][ T219] ? afs_put_call+0xa40/0xa40 [ 65.187459][ T219] end_report+0x4d/0x53 [ 65.191611][ T219] kasan_report.cold+0xd/0x37 [ 65.196308][ T219] ? rcu_read_lock_held+0x81/0xb0 [ 65.201343][ T219] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.206901][ T219] afs_wake_up_async_call+0x6aa/0x770 [ 65.212350][ T219] ? afs_close_socket+0x320/0x320 [ 65.217369][ T219] ? afs_put_call+0xa40/0xa40 [ 65.222049][ T219] rxrpc_notify_socket+0x1db/0x5d0 [ 65.227155][ T219] ? afs_put_call+0xa40/0xa40 [ 65.231911][ T219] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 65.238838][ T219] rxrpc_call_completed+0xca/0xf0 [ 65.243857][ T219] rxrpc_discard_prealloc+0x781/0xab0 [ 65.249241][ T219] ? lock_sock_nested+0x94/0x110 [ 65.254201][ T219] rxrpc_listen+0x147/0x360 [ 65.258694][ T219] afs_close_socket+0x95/0x320 [ 65.263447][ T219] ? afs_purge_servers+0x16d/0x300 [ 65.268643][ T219] ? afs_rx_discard_new_call+0x50/0x50 [ 65.274881][ T219] ? init_wait_var_entry+0x200/0x200 [ 65.280181][ T219] ? rcu_read_lock_held_common+0xa0/0xa0 [ 65.286419][ T219] ? check_preemption_disabled+0x38/0x220 [ 65.292217][ T219] afs_net_exit+0x1bc/0x310 [ 65.296730][ T219] ? afs_net_init+0xe30/0xe30 [ 65.301491][ T219] ops_exit_list.isra.0+0xa8/0x150 [ 65.306599][ T219] cleanup_net+0x511/0xa50 [ 65.311106][ T219] ? unregister_pernet_device+0x70/0x70 [ 65.316659][ T219] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.322644][ T219] process_one_work+0x965/0x1690 [ 65.327675][ T219] ? lock_release+0x800/0x800 [ 65.332372][ T219] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.338518][ T219] ? rwlock_bug.part.0+0x90/0x90 [ 65.343488][ T219] worker_thread+0x96/0xe10 [ 65.348001][ T219] ? process_one_work+0x1690/0x1690 [ 65.353200][ T219] kthread+0x3b5/0x4a0 [ 65.357271][ T219] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.362995][ T219] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.368721][ T219] ret_from_fork+0x1f/0x30 [ 65.374702][ T219] Kernel Offset: disabled [ 65.379280][ T219] Rebooting in 86400 seconds..