Starting Load/Save RF Kill Switch Status... [ 58.832051][ T6732] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6732 [ 58.842019][ T6732] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.848316][ T6732] CPU: 1 PID: 6732 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 [ 58.856943][ T6732] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.866996][ T6732] Call Trace: [ 58.870291][ T6732] dump_stack+0x18f/0x20d [ 58.874639][ T6732] check_preemption_disabled+0x20d/0x220 [ 58.880276][ T6732] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.885393][ T6732] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.890850][ T6732] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.896568][ T6732] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.901857][ T6732] ? ext4_ext_release+0x10/0x10 [ 58.906702][ T6732] ? down_write_killable+0x170/0x170 [ 58.911984][ T6732] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.917428][ T6732] ext4_map_blocks+0x4cb/0x1640 [ 58.922372][ T6732] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.927716][ T6732] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.933255][ T6732] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.939252][ T6732] ? prandom_u32_state+0xe/0x170 [ 58.944182][ T6732] ? __brelse+0x84/0xa0 [ 58.948335][ T6732] ? __ext4_new_inode+0x144/0x55e0 [ 58.953432][ T6732] ext4_getblk+0xad/0x520 [ 58.957952][ T6732] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.963700][ T6732] ? ext4_free_inode+0x1700/0x1700 [ 58.968794][ T6732] ext4_bread+0x7c/0x380 [ 58.973045][ T6732] ? ext4_getblk+0x520/0x520 [ 58.977712][ T6732] ? dquot_get_next_dqblk+0x180/0x180 [ 58.983068][ T6732] ext4_append+0x153/0x360 [ 58.987469][ T6732] ext4_mkdir+0x5e0/0xdf0 [ 58.991782][ T6732] ? ext4_rmdir+0xde0/0xde0 [ 58.996321][ T6732] ? security_inode_permission+0xc4/0xf0 [ 59.001940][ T6732] vfs_mkdir+0x419/0x690 [ 59.006165][ T6732] do_mkdirat+0x21e/0x280 [ 59.010558][ T6732] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.015417][ T6732] ? do_syscall_64+0x1c/0xe0 [ 59.020001][ T6732] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.025965][ T6732] do_syscall_64+0x60/0xe0 [ 59.030369][ T6732] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.036244][ T6732] RIP: 0033:0x7f88b3b9f687 [ 59.040657][ T6732] Code: Bad RIP value. [ 59.044708][ T6732] RSP: 002b:00007ffcc8331ac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 59.053096][ T6732] RAX: ffffffffffffffda RBX: 00005640286cb985 RCX: 00007f88b3b9f687 [ 59.061069][ T6732] RDX: 00007ffcc8331990 RSI: 00000000000001ed RDI: 00005640286cb985 [ 59.069023][ T6732] RBP: 00007f88b3b9f680 R08: 0000000000000100 R09: 0000000000000000 [ 59.077621][ T6732] R10: 00005640286cb980 R11: 0000000000000246 R12: 00000000000001ed [ 59.085602][ T6732] R13: 00007ffcc8331c50 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 63.426130][ T57] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/57 [ 63.435917][ T57] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.441823][ T57] CPU: 0 PID: 57 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 63.450035][ T57] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.460168][ T57] Workqueue: writeback wb_workfn (flush-8:0) [ 63.466132][ T57] Call Trace: [ 63.469414][ T57] dump_stack+0x18f/0x20d [ 63.473744][ T57] check_preemption_disabled+0x20d/0x220 [ 63.479360][ T57] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.484452][ T57] ? ext4_find_extent+0x81a/0xad0 [ 63.489473][ T57] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.494926][ T57] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.500647][ T57] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.505922][ T57] ? ext4_ext_release+0x10/0x10 [ 63.510763][ T57] ? down_write_killable+0x170/0x170 [ 63.516185][ T57] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.522160][ T57] ext4_map_blocks+0x4cb/0x1640 [ 63.527006][ T57] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.532313][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.537857][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.543820][ T57] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 63.549378][ T57] ext4_writepages+0x1a7b/0x33c0 [ 63.554504][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.560123][ T57] ? __lock_acquire+0x2224/0x48b0 [ 63.565154][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 63.571184][ T57] ? print_usage_bug+0x240/0x240 [ 63.576166][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 63.582133][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.587751][ T57] ? do_writepages+0xfa/0x2a0 [ 63.592404][ T57] do_writepages+0xfa/0x2a0 [ 63.596950][ T57] ? page_writeback_cpu_online+0x10/0x10 [ 63.602565][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.608204][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.614174][ T57] ? lock_downgrade+0x840/0x840 [ 63.619019][ T57] __writeback_single_inode+0x12a/0x13d0 [ 63.624747][ T57] ? _raw_spin_unlock+0x24/0x40 [ 63.630198][ T57] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 63.637640][ T57] writeback_sb_inodes+0x515/0xdc0 [ 63.642754][ T57] ? __writeback_single_inode+0x13d0/0x13d0 [ 63.648656][ T57] __writeback_inodes_wb+0xc3/0x250 [ 63.654319][ T57] wb_writeback+0x8db/0xd50 [ 63.658928][ T57] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 63.665271][ T57] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 63.671374][ T57] ? cpumask_next+0x3c/0x40 [ 63.675882][ T57] ? get_nr_dirty_inodes+0xd6/0x130 [ 63.681077][ T57] wb_workfn+0xab3/0x1090 [ 63.685603][ T57] ? inode_wait_for_writeback+0x30/0x30 [ 63.691153][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.696800][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.703900][ T57] process_one_work+0x965/0x1690 [ 63.709126][ T57] ? lock_release+0x800/0x800 [ 63.713826][ T57] ? pwq_dec_nr_in_flight+0x310/0x310 [ 63.719216][ T57] ? rwlock_bug.part.0+0x90/0x90 [ 63.724269][ T57] worker_thread+0x96/0xe10 [ 63.728814][ T57] ? process_one_work+0x1690/0x1690 [ 63.734006][ T57] kthread+0x3b5/0x4a0 [ 63.738187][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.743942][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.749728][ T57] ret_from_fork+0x1f/0x30 [ 63.762779][ T57] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/57 [ 63.772354][ T57] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.778372][ T57] CPU: 0 PID: 57 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 63.786613][ T57] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.796698][ T57] Workqueue: writeback wb_workfn (flush-8:0) [ 63.802945][ T57] Call Trace: [ 63.806283][ T57] dump_stack+0x18f/0x20d [ 63.810753][ T57] check_preemption_disabled+0x20d/0x220 [ 63.816403][ T57] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.821573][ T57] ? ext4_find_extent+0x81a/0xad0 [ 63.826623][ T57] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.832100][ T57] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.837876][ T57] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.843198][ T57] ? ext4_ext_release+0x10/0x10 [ 63.848115][ T57] ? down_write_killable+0x170/0x170 [ 63.853587][ T57] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.859059][ T57] ext4_map_blocks+0x4cb/0x1640 [ 63.864353][ T57] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.869562][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.875092][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.881168][ T57] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 63.886652][ T57] ext4_writepages+0x1a7b/0x33c0 [ 63.891706][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.897326][ T57] ? __lock_acquire+0x2224/0x48b0 [ 63.902620][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 63.908601][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 63.914586][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.920206][ T57] ? do_writepages+0xfa/0x2a0 [ 63.924869][ T57] do_writepages+0xfa/0x2a0 [ 63.929456][ T57] ? page_writeback_cpu_online+0x10/0x10 [ 63.935080][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.940611][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.946799][ T57] ? lock_downgrade+0x840/0x840 [ 63.951742][ T57] __writeback_single_inode+0x12a/0x13d0 [ 63.957368][ T57] ? _raw_spin_unlock+0x24/0x40 [ 63.962211][ T57] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 63.968211][ T57] writeback_sb_inodes+0x515/0xdc0 [ 63.973343][ T57] ? __writeback_single_inode+0x13d0/0x13d0 [ 63.979237][ T57] __writeback_inodes_wb+0xc3/0x250 [ 63.984427][ T57] wb_writeback+0x8db/0xd50 [ 63.988937][ T57] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 63.995259][ T57] ? cpumask_next+0x3c/0x40 [ 63.999764][ T57] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.004952][ T57] wb_workfn+0x9bc/0x1090 [ 64.009448][ T57] ? inode_wait_for_writeback+0x30/0x30 [ 64.014988][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.020536][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.026509][ T57] process_one_work+0x965/0x1690 [ 64.031458][ T57] ? lock_release+0x800/0x800 [ 64.036120][ T57] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.041478][ T57] ? rwlock_bug.part.0+0x90/0x90 [ 64.046408][ T57] worker_thread+0x96/0xe10 [ 64.050916][ T57] ? process_one_work+0x1690/0x1690 [ 64.056100][ T57] kthread+0x3b5/0x4a0 [ 64.060154][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.065859][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.071764][ T57] ret_from_fork+0x1f/0x30 [ 64.079729][ T57] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/57 [ 64.090093][ T57] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.096075][ T57] CPU: 0 PID: 57 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.104311][ T57] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.114732][ T57] Workqueue: writeback wb_workfn (flush-8:0) [ 64.120698][ T57] Call Trace: [ 64.123990][ T57] dump_stack+0x18f/0x20d [ 64.128310][ T57] check_preemption_disabled+0x20d/0x220 [ 64.133924][ T57] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.139033][ T57] ? ext4_find_extent+0x81a/0xad0 [ 64.144154][ T57] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.149599][ T57] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.155307][ T57] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.160591][ T57] ? ext4_ext_release+0x10/0x10 [ 64.165457][ T57] ? down_write_killable+0x170/0x170 [ 64.170728][ T57] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.176174][ T57] ext4_map_blocks+0x4cb/0x1640 [ 64.181012][ T57] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.186198][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.191728][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.197703][ T57] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.203148][ T57] ext4_writepages+0x1a7b/0x33c0 [ 64.208175][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.213789][ T57] ? __lock_acquire+0x2224/0x48b0 [ 64.218835][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.224813][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.230783][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.236398][ T57] ? do_writepages+0xfa/0x2a0 [ 64.241057][ T57] do_writepages+0xfa/0x2a0 [ 64.245549][ T57] ? page_writeback_cpu_online+0x10/0x10 [ 64.251180][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.256712][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.262676][ T57] ? lock_downgrade+0x840/0x840 [ 64.267601][ T57] __writeback_single_inode+0x12a/0x13d0 [ 64.273217][ T57] ? _raw_spin_unlock+0x24/0x40 [ 64.278063][ T57] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.284030][ T57] writeback_sb_inodes+0x515/0xdc0 [ 64.289134][ T57] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.295025][ T57] __writeback_inodes_wb+0xc3/0x250 [ 64.300214][ T57] wb_writeback+0x8db/0xd50 [ 64.304710][ T57] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.311028][ T57] ? cpumask_next+0x3c/0x40 [ 64.315518][ T57] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.320708][ T57] wb_workfn+0x9bc/0x1090 [ 64.325027][ T57] ? inode_wait_for_writeback+0x30/0x30 [ 64.330561][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.336092][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.342150][ T57] process_one_work+0x965/0x1690 [ 64.347084][ T57] ? lock_release+0x800/0x800 [ 64.351758][ T57] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.357119][ T57] ? rwlock_bug.part.0+0x90/0x90 [ 64.362067][ T57] worker_thread+0x96/0xe10 [ 64.366573][ T57] ? process_one_work+0x1690/0x1690 [ 64.371770][ T57] kthread+0x3b5/0x4a0 [ 64.375842][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.381552][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.387260][ T57] ret_from_fork+0x1f/0x30 [ 64.393403][ T57] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/57 [ 64.402552][ T57] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.408547][ T57] CPU: 0 PID: 57 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.416791][ T57] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.426881][ T57] Workqueue: writeback wb_workfn (flush-8:0) [ 64.432868][ T57] Call Trace: [ 64.436144][ T57] dump_stack+0x18f/0x20d [ 64.440465][ T57] check_preemption_disabled+0x20d/0x220 [ 64.446091][ T57] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.451202][ T57] ? ext4_find_extent+0x81a/0xad0 [ 64.456758][ T57] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.462202][ T57] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.467912][ T57] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.473304][ T57] ? ext4_ext_release+0x10/0x10 [ 64.478168][ T57] ? down_write_killable+0x170/0x170 [ 64.483434][ T57] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.488895][ T57] ext4_map_blocks+0x4cb/0x1640 [ 64.493751][ T57] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.498943][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.504475][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.510457][ T57] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.515909][ T57] ext4_writepages+0x1a7b/0x33c0 [ 64.520852][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.526481][ T57] ? __lock_acquire+0x2224/0x48b0 [ 64.531506][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.537474][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.543440][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.549057][ T57] ? do_writepages+0xfa/0x2a0 [ 64.553717][ T57] do_writepages+0xfa/0x2a0 [ 64.558210][ T57] ? page_writeback_cpu_online+0x10/0x10 [ 64.563833][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.569363][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.575327][ T57] ? lock_downgrade+0x840/0x840 [ 64.580169][ T57] __writeback_single_inode+0x12a/0x13d0 [ 64.586148][ T57] ? _raw_spin_unlock+0x24/0x40 [ 64.590998][ T57] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.596967][ T57] writeback_sb_inodes+0x515/0xdc0 [ 64.602075][ T57] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.608081][ T57] __writeback_inodes_wb+0xc3/0x250 [ 64.613316][ T57] wb_writeback+0x8db/0xd50 [ 64.617820][ T57] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.624139][ T57] ? cpumask_next+0x3c/0x40 [ 64.628637][ T57] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.633826][ T57] wb_workfn+0x9bc/0x1090 [ 64.638146][ T57] ? inode_wait_for_writeback+0x30/0x30 [ 64.643689][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.649220][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.655227][ T57] process_one_work+0x965/0x1690 [ 64.660160][ T57] ? lock_release+0x800/0x800 [ 64.664840][ T57] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.670210][ T57] ? rwlock_bug.part.0+0x90/0x90 [ 64.675161][ T57] worker_thread+0x96/0xe10 Warning: Permanently added '10.128.10.50' (ECDSA) to the list of known hosts. [ 64.679666][ T57] ? process_one_work+0x1690/0x1690 [ 64.684939][ T57] kthread+0x3b5/0x4a0 [ 64.688992][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.694692][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.700418][ T57] ret_from_fork+0x1f/0x30 2020/06/16 23:29:51 fuzzer started 2020/06/16 23:29:51 connecting to host at 10.128.0.26:44183 2020/06/16 23:29:51 checking machine... 2020/06/16 23:29:51 checking revisions... 2020/06/16 23:29:51 testing simple program... [ 65.420613][ T6775] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6775 [ 65.429738][ T6775] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.435730][ T6775] CPU: 1 PID: 6775 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 65.443971][ T6775] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.454150][ T6775] Call Trace: [ 65.457444][ T6775] dump_stack+0x18f/0x20d [ 65.461770][ T6775] check_preemption_disabled+0x20d/0x220 [ 65.467382][ T6775] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.472495][ T6775] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.478193][ T6775] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.483913][ T6775] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.489235][ T6775] ? ext4_ext_release+0x10/0x10 [ 65.494129][ T6775] ? down_write_killable+0x170/0x170 [ 65.499422][ T6775] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.504870][ T6775] ext4_map_blocks+0x4cb/0x1640 [ 65.509729][ T6775] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.514936][ T6775] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.520468][ T6775] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.527579][ T6775] ? prandom_u32_state+0xe/0x170 [ 65.532518][ T6775] ? __brelse+0x84/0xa0 [ 65.536670][ T6775] ? __ext4_new_inode+0x144/0x55e0 [ 65.541780][ T6775] ext4_getblk+0xad/0x520 [ 65.546126][ T6775] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.551844][ T6775] ? ext4_free_inode+0x1700/0x1700 [ 65.556964][ T6775] ext4_bread+0x7c/0x380 [ 65.561214][ T6775] ? ext4_getblk+0x520/0x520 [ 65.565913][ T6775] ? dquot_get_next_dqblk+0x180/0x180 [ 65.571276][ T6775] ext4_append+0x153/0x360 [ 65.575684][ T6775] ext4_mkdir+0x5e0/0xdf0 [ 65.580032][ T6775] ? ext4_rmdir+0xde0/0xde0 [ 65.584521][ T6775] ? security_inode_permission+0xc4/0xf0 [ 65.590139][ T6775] vfs_mkdir+0x419/0x690 [ 65.594452][ T6775] do_mkdirat+0x21e/0x280 [ 65.598776][ T6775] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.603636][ T6775] ? do_syscall_64+0x1c/0xe0 [ 65.608219][ T6775] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.614194][ T6775] do_syscall_64+0x60/0xe0 [ 65.618641][ T6775] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.624631][ T6775] RIP: 0033:0x4b02a0 [ 65.628506][ T6775] Code: Bad RIP value. [ 65.632654][ T6775] RSP: 002b:000000c00004f4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 65.641072][ T6775] RAX: ffffffffffffffda RBX: 000000c00002e500 RCX: 00000000004b02a0 [ 65.649035][ T6775] RDX: 00000000000001c0 RSI: 000000c0000cab40 RDI: ffffffffffffff9c [ 65.657033][ T6775] RBP: 000000c00004f510 R08: 0000000000000000 R09: 0000000000000000 [ 65.664992][ T6775] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 65.672960][ T6775] R13: 000000000000005b R14: 000000000000005a R15: 0000000000000100 [ 65.705582][ T6788] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6788 [ 65.715273][ T6788] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.721199][ T6788] CPU: 1 PID: 6788 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.729824][ T6788] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.739899][ T6788] Call Trace: [ 65.743219][ T6788] dump_stack+0x18f/0x20d [ 65.747598][ T6788] check_preemption_disabled+0x20d/0x220 [ 65.753263][ T6788] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.758378][ T6788] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.763820][ T6788] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.769529][ T6788] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.774819][ T6788] ? ext4_ext_release+0x10/0x10 [ 65.779711][ T6788] ? down_write_killable+0x170/0x170 [ 65.785005][ T6788] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.790457][ T6788] ext4_map_blocks+0x4cb/0x1640 [ 65.795397][ T6788] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.800685][ T6788] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.806224][ T6788] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.812213][ T6788] ? prandom_u32_state+0xe/0x170 [ 65.817159][ T6788] ? __brelse+0x84/0xa0 [ 65.821426][ T6788] ? __ext4_new_inode+0x144/0x55e0 [ 65.826547][ T6788] ext4_getblk+0xad/0x520 [ 65.830896][ T6788] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.836636][ T6788] ? ext4_free_inode+0x1700/0x1700 [ 65.841754][ T6788] ext4_bread+0x7c/0x380 [ 65.845989][ T6788] ? ext4_getblk+0x520/0x520 [ 65.850578][ T6788] ? dquot_get_next_dqblk+0x180/0x180 [ 65.855959][ T6788] ext4_append+0x153/0x360 [ 65.860396][ T6788] ext4_mkdir+0x5e0/0xdf0 [ 65.864769][ T6788] ? ext4_rmdir+0xde0/0xde0 [ 65.869308][ T6788] ? security_inode_permission+0xc4/0xf0 [ 65.875184][ T6788] vfs_mkdir+0x419/0x690 [ 65.879437][ T6788] do_mkdirat+0x21e/0x280 [ 65.883780][ T6788] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.888673][ T6788] ? do_syscall_64+0x1c/0xe0 [ 65.893289][ T6788] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.899474][ T6788] do_syscall_64+0x60/0xe0 [ 65.903983][ T6788] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.910037][ T6788] RIP: 0033:0x45bed7 [ 65.913926][ T6788] Code: Bad RIP value. [ 65.917989][ T6788] RSP: 002b:00007ffc4357a4d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 65.926512][ T6788] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 65.934673][ T6788] RDX: 0000000000000002 RSI: 00000000000001c0 RDI: 00007ffc4357a6b0 [ 65.942668][ T6788] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000002b80 [ 65.950648][ T6788] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 65.958684][ T6788] R13: 00007ffc4357a6b0 R14: 8421084210842109 R15: 00007ffc4357a6bc [ 66.050585][ T6789] IPVS: ftp: loaded support on port[0] = 21 [ 66.088623][ T6789] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6789 [ 66.098347][ T6789] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.105420][ T6789] CPU: 0 PID: 6789 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.114098][ T6789] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.124150][ T6789] Call Trace: [ 66.127447][ T6789] dump_stack+0x18f/0x20d [ 66.131768][ T6789] check_preemption_disabled+0x20d/0x220 [ 66.137391][ T6789] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.142514][ T6789] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.147979][ T6789] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.153700][ T6789] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.158977][ T6789] ? ext4_ext_release+0x10/0x10 [ 66.164279][ T6789] ? down_write_killable+0x170/0x170 [ 66.169590][ T6789] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.175068][ T6789] ext4_map_blocks+0x4cb/0x1640 [ 66.180202][ T6789] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.185413][ T6789] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.191034][ T6789] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.197014][ T6789] ? prandom_u32_state+0xe/0x170 [ 66.202200][ T6789] ? __brelse+0x84/0xa0 [ 66.206343][ T6789] ? __ext4_new_inode+0x144/0x55e0 [ 66.211458][ T6789] ext4_getblk+0xad/0x520 [ 66.215793][ T6789] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.221520][ T6789] ? ext4_free_inode+0x1700/0x1700 [ 66.226637][ T6789] ext4_bread+0x7c/0x380 [ 66.230863][ T6789] ? ext4_getblk+0x520/0x520 [ 66.236498][ T6789] ? dquot_get_next_dqblk+0x180/0x180 [ 66.241872][ T6789] ext4_append+0x153/0x360 [ 66.246276][ T6789] ext4_mkdir+0x5e0/0xdf0 [ 66.250604][ T6789] ? ext4_rmdir+0xde0/0xde0 [ 66.255116][ T6789] ? security_inode_permission+0xc4/0xf0 [ 66.260737][ T6789] vfs_mkdir+0x419/0x690 [ 66.264962][ T6789] do_mkdirat+0x21e/0x280 [ 66.269478][ T6789] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.274336][ T6789] ? do_syscall_64+0x1c/0xe0 [ 66.278920][ T6789] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.285010][ T6789] do_syscall_64+0x60/0xe0 [ 66.289456][ T6789] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.295354][ T6789] RIP: 0033:0x45bed7 [ 66.299235][ T6789] Code: Bad RIP value. [ 66.303285][ T6789] RSP: 002b:00007ffc4357a3c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 66.311809][ T6789] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 66.319766][ T6789] RDX: 00007ffc4357a413 RSI: 00000000000001ff RDI: 00007ffc4357a410 [ 66.327734][ T6789] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 66.335861][ T6789] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185c0 [ 66.343914][ T6789] R13: 00007ffc4357a400 R14: 0000000000000000 R15: 00007ffc4357a410 [ 66.393667][ T6789] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6789 [ 66.403407][ T6789] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.409420][ T6789] CPU: 1 PID: 6789 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.418004][ T6789] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.428063][ T6789] Call Trace: [ 66.431363][ T6789] dump_stack+0x18f/0x20d [ 66.435797][ T6789] check_preemption_disabled+0x20d/0x220 [ 66.441535][ T6789] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.446669][ T6789] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.452132][ T6789] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.457865][ T6789] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.463166][ T6789] ? ext4_ext_release+0x10/0x10 [ 66.468051][ T6789] ? down_write_killable+0x170/0x170 [ 66.473337][ T6789] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.478796][ T6789] ext4_map_blocks+0x4cb/0x1640 [ 66.483667][ T6789] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.488845][ T6789] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.494369][ T6789] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.500331][ T6789] ? prandom_u32_state+0xe/0x170 [ 66.505251][ T6789] ? __brelse+0x84/0xa0 [ 66.509395][ T6789] ? __ext4_new_inode+0x144/0x55e0 [ 66.514510][ T6789] ext4_getblk+0xad/0x520 [ 66.518836][ T6789] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.524553][ T6789] ? ext4_free_inode+0x1700/0x1700 [ 66.529657][ T6789] ext4_bread+0x7c/0x380 [ 66.533888][ T6789] ? ext4_getblk+0x520/0x520 [ 66.538460][ T6789] ? dquot_get_next_dqblk+0x180/0x180 [ 66.543812][ T6789] ext4_append+0x153/0x360 [ 66.548221][ T6789] ext4_mkdir+0x5e0/0xdf0 [ 66.552537][ T6789] ? ext4_rmdir+0xde0/0xde0 [ 66.557021][ T6789] ? security_inode_permission+0xc4/0xf0 [ 66.562785][ T6789] vfs_mkdir+0x419/0x690 [ 66.567075][ T6789] do_mkdirat+0x21e/0x280 [ 66.571489][ T6789] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.576327][ T6789] ? do_syscall_64+0x1c/0xe0 [ 66.580924][ T6789] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.586887][ T6789] do_syscall_64+0x60/0xe0 [ 66.591286][ T6789] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.597155][ T6789] RIP: 0033:0x45bed7 [ 66.601021][ T6789] Code: Bad RIP value. [ 66.605073][ T6789] RSP: 002b:00007ffc4357a3c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 66.613545][ T6789] RAX: ffffffffffffffda RBX: 0000000000010344 RCX: 000000000045bed7 [ 66.621557][ T6789] RDX: 00007ffc4357a413 RSI: 00000000000001ff RDI: 00007ffc4357a410 [ 66.629566][ T6789] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 2020/06/16 23:29:53 building call list... [ 66.637544][ T6789] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 66.645978][ T6789] R13: 00007ffc4357a400 R14: 000000000001033f R15: 00007ffc4357a410 [ 66.904563][ T187] tipc: TX() has been purged, node left! [ 67.416935][ T187] ================================================================== [ 67.425185][ T187] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 67.433081][ T187] Write of size 1 at addr ffff888097ef19e4 by task kworker/u4:5/187 [ 67.441144][ T187] [ 67.443486][ T187] CPU: 0 PID: 187 Comm: kworker/u4:5 Not tainted 5.8.0-rc1-syzkaller #0 [ 67.451802][ T187] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.461943][ T187] Workqueue: netns cleanup_net [ 67.466711][ T187] Call Trace: [ 67.470016][ T187] dump_stack+0x18f/0x20d [ 67.474347][ T187] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.479886][ T187] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.485598][ T187] ? afs_put_call+0xa40/0xa40 [ 67.490275][ T187] print_address_description.constprop.0.cold+0xd3/0x413 [ 67.497305][ T187] ? vprintk_func+0x97/0x1a6 [ 67.501935][ T187] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.507478][ T187] kasan_report.cold+0x1f/0x37 [ 67.512244][ T187] ? rcu_read_lock_held_common+0x51/0xa0 [ 67.517875][ T187] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.523421][ T187] afs_wake_up_async_call+0x6aa/0x770 [ 67.528964][ T187] ? afs_close_socket+0x320/0x320 [ 67.534003][ T187] ? afs_put_call+0xa40/0xa40 [ 67.538678][ T187] rxrpc_notify_socket+0x1db/0x5d0 [ 67.543793][ T187] ? afs_put_call+0xa40/0xa40 [ 67.548481][ T187] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 67.554904][ T187] rxrpc_call_completed+0xca/0xf0 [ 67.559935][ T187] rxrpc_discard_prealloc+0x781/0xab0 [ 67.565310][ T187] ? lock_sock_nested+0x94/0x110 [ 67.570250][ T187] rxrpc_listen+0x147/0x360 [ 67.574753][ T187] afs_close_socket+0x95/0x320 [ 67.579516][ T187] ? afs_purge_servers+0x16d/0x300 [ 67.584642][ T187] ? afs_rx_discard_new_call+0x50/0x50 [ 67.593407][ T187] ? init_wait_var_entry+0x200/0x200 [ 67.598694][ T187] ? rcu_read_lock_held_common+0xa0/0xa0 [ 67.604597][ T187] ? check_preemption_disabled+0x38/0x220 [ 67.610344][ T187] afs_net_exit+0x1bc/0x310 [ 67.615472][ T187] ? afs_net_init+0xe30/0xe30 [ 67.620772][ T187] ops_exit_list.isra.0+0xa8/0x150 [ 67.625885][ T187] cleanup_net+0x511/0xa50 [ 67.630485][ T187] ? unregister_pernet_device+0x70/0x70 [ 67.636035][ T187] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.642195][ T187] process_one_work+0x965/0x1690 [ 67.647149][ T187] ? lock_release+0x800/0x800 [ 67.651828][ T187] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.657213][ T187] ? rwlock_bug.part.0+0x90/0x90 [ 67.662161][ T187] worker_thread+0x96/0xe10 [ 67.666675][ T187] ? process_one_work+0x1690/0x1690 [ 67.672308][ T187] kthread+0x3b5/0x4a0 [ 67.676378][ T187] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.682097][ T187] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.687847][ T187] ret_from_fork+0x1f/0x30 [ 67.692271][ T187] [ 67.694601][ T187] Allocated by task 6789: [ 67.698927][ T187] save_stack+0x1b/0x40 [ 67.703080][ T187] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 67.708706][ T187] kmem_cache_alloc_trace+0x153/0x7d0 [ 67.714076][ T187] afs_alloc_call+0x55/0x630 [ 67.718673][ T187] afs_charge_preallocation+0xe9/0x2d0 [ 67.724132][ T187] afs_open_socket+0x292/0x360 [ 67.728895][ T187] afs_net_init+0xa6c/0xe30 [ 67.733394][ T187] ops_init+0xaf/0x420 [ 67.737457][ T187] setup_net+0x2de/0x860 [ 67.741710][ T187] copy_net_ns+0x293/0x590 [ 67.746143][ T187] create_new_namespaces+0x3fb/0xb30 [ 67.751450][ T187] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 67.757101][ T187] ksys_unshare+0x43d/0x8e0 [ 67.761625][ T187] __x64_sys_unshare+0x2d/0x40 [ 67.766386][ T187] do_syscall_64+0x60/0xe0 [ 67.770807][ T187] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.776685][ T187] [ 67.779008][ T187] Freed by task 187: [ 67.782988][ T187] save_stack+0x1b/0x40 [ 67.787156][ T187] __kasan_slab_free+0xf7/0x140 [ 67.792017][ T187] kfree+0x109/0x2b0 [ 67.795907][ T187] afs_put_call+0x585/0xa40 [ 67.800406][ T187] rxrpc_discard_prealloc+0x764/0xab0 [ 67.805775][ T187] rxrpc_listen+0x147/0x360 [ 67.810280][ T187] afs_close_socket+0x95/0x320 [ 67.815132][ T187] afs_net_exit+0x1bc/0x310 [ 67.819628][ T187] ops_exit_list.isra.0+0xa8/0x150 [ 67.824734][ T187] cleanup_net+0x511/0xa50 [ 67.829234][ T187] process_one_work+0x965/0x1690 [ 67.834180][ T187] worker_thread+0x96/0xe10 [ 67.838676][ T187] kthread+0x3b5/0x4a0 [ 67.842749][ T187] ret_from_fork+0x1f/0x30 [ 67.847516][ T187] [ 67.849859][ T187] The buggy address belongs to the object at ffff888097ef1800 [ 67.849859][ T187] which belongs to the cache kmalloc-1k of size 1024 [ 67.864028][ T187] The buggy address is located 484 bytes inside of [ 67.864028][ T187] 1024-byte region [ffff888097ef1800, ffff888097ef1c00) [ 67.877487][ T187] The buggy address belongs to the page: [ 67.883131][ T187] page:ffffea00025fbc40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 67.892679][ T187] flags: 0xfffe0000000200(slab) [ 67.897636][ T187] raw: 00fffe0000000200 ffffea00025d4908 ffffea00025d1c08 ffff8880aa000c40 [ 67.906234][ T187] raw: 0000000000000000 ffff888097ef1000 0000000100000002 0000000000000000 [ 67.914817][ T187] page dumped because: kasan: bad access detected [ 67.921233][ T187] [ 67.923552][ T187] Memory state around the buggy address: [ 67.929291][ T187] ffff888097ef1880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.937365][ T187] ffff888097ef1900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.945424][ T187] >ffff888097ef1980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.953566][ T187] ^ [ 67.960759][ T187] ffff888097ef1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.968822][ T187] ffff888097ef1a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.976963][ T187] ================================================================== [ 67.985016][ T187] Disabling lock debugging due to kernel taint [ 67.992278][ T187] Kernel panic - not syncing: panic_on_warn set ... [ 67.998867][ T187] CPU: 0 PID: 187 Comm: kworker/u4:5 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 68.008561][ T187] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.019743][ T187] Workqueue: netns cleanup_net [ 68.024493][ T187] Call Trace: [ 68.027780][ T187] dump_stack+0x18f/0x20d [ 68.032115][ T187] ? afs_wake_up_async_call+0x670/0x770 [ 68.038705][ T187] ? afs_put_call+0xa40/0xa40 [ 68.043392][ T187] panic+0x2e3/0x75c [ 68.047297][ T187] ? __warn_printk+0xf3/0xf3 [ 68.051933][ T187] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 68.058178][ T187] ? trace_hardirqs_on+0x55/0x220 [ 68.063200][ T187] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.068822][ T187] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.074363][ T187] ? afs_put_call+0xa40/0xa40 [ 68.079037][ T187] end_report+0x4d/0x53 [ 68.083190][ T187] kasan_report.cold+0xd/0x37 [ 68.087867][ T187] ? rcu_read_lock_held_common+0x51/0xa0 [ 68.093667][ T187] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.099204][ T187] afs_wake_up_async_call+0x6aa/0x770 [ 68.104693][ T187] ? afs_close_socket+0x320/0x320 [ 68.109797][ T187] ? afs_put_call+0xa40/0xa40 [ 68.114467][ T187] rxrpc_notify_socket+0x1db/0x5d0 [ 68.119666][ T187] ? afs_put_call+0xa40/0xa40 [ 68.124339][ T187] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 68.130764][ T187] rxrpc_call_completed+0xca/0xf0 [ 68.135791][ T187] rxrpc_discard_prealloc+0x781/0xab0 [ 68.141161][ T187] ? lock_sock_nested+0x94/0x110 [ 68.146096][ T187] rxrpc_listen+0x147/0x360 [ 68.150594][ T187] afs_close_socket+0x95/0x320 [ 68.155348][ T187] ? afs_purge_servers+0x16d/0x300 [ 68.160453][ T187] ? afs_rx_discard_new_call+0x50/0x50 [ 68.166014][ T187] ? init_wait_var_entry+0x200/0x200 [ 68.171310][ T187] ? rcu_read_lock_held_common+0xa0/0xa0 [ 68.176951][ T187] ? check_preemption_disabled+0x38/0x220 [ 68.182666][ T187] afs_net_exit+0x1bc/0x310 [ 68.187181][ T187] ? afs_net_init+0xe30/0xe30 [ 68.191850][ T187] ops_exit_list.isra.0+0xa8/0x150 [ 68.196953][ T187] cleanup_net+0x511/0xa50 [ 68.201396][ T187] ? unregister_pernet_device+0x70/0x70 [ 68.207027][ T187] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.213093][ T187] process_one_work+0x965/0x1690 [ 68.218036][ T187] ? lock_release+0x800/0x800 [ 68.222713][ T187] ? pwq_dec_nr_in_flight+0x310/0x310 [ 68.228076][ T187] ? rwlock_bug.part.0+0x90/0x90 [ 68.233009][ T187] worker_thread+0x96/0xe10 [ 68.237513][ T187] ? process_one_work+0x1690/0x1690 [ 68.242700][ T187] kthread+0x3b5/0x4a0 [ 68.246769][ T187] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.252493][ T187] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.258203][ T187] ret_from_fork+0x1f/0x30 [ 68.264547][ T187] Kernel Offset: disabled [ 68.268918][ T187] Rebooting in 86400 seconds..