[ 57.693914][ T25] ? lock_release+0x800/0x800 [ 57.698677][ T25] ? pwq_dec_nr_in_flight+0x310/0x310 [ 57.704039][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 57.708998][ T25] worker_thread+0x96/0xe10 [ 57.713494][ T25] ? process_one_work+0x1690/0x1690 [ 57.718678][ T25] kthread+0x3b5/0x4a0 [ 57.722730][ T25] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.728431][ T25] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.734136][ T25] ret_from_fork+0x1f/0x30 [ 57.767626][ T25] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/25 [ 57.776932][ T25] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.782852][ T25] CPU: 1 PID: 25 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 57.791099][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.801190][ T25] Workqueue: writeback wb_workfn (flush-8:0) [ 57.807958][ T25] Call Trace: [ 57.811459][ T25] dump_stack+0x18f/0x20d [ 57.815814][ T25] check_preemption_disabled+0x20d/0x220 [ 57.821471][ T25] ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.826611][ T25] ? ext4_find_extent+0x81a/0xad0 [ 57.831663][ T25] ? ext4_ext_search_right+0x2ca/0xb20 [ 57.837141][ T25] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 57.842891][ T25] ext4_ext_map_blocks+0x201b/0x33e0 [ 57.848217][ T25] ? ext4_ext_release+0x10/0x10 [ 57.853108][ T25] ? down_write_killable+0x170/0x170 [ 57.858407][ T25] ? ext4_es_lookup_extent+0x41d/0xd10 [ 57.863886][ T25] ext4_map_blocks+0x4cb/0x1640 [ 57.868764][ T25] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 57.873983][ T25] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.879543][ T25] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.886248][ T25] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 57.891729][ T25] ext4_writepages+0x1a7b/0x33c0 [ 57.896702][ T25] ? __ext4_mark_inode_dirty+0x940/0x940 [ 57.902343][ T25] ? __lock_acquire+0x2224/0x48b0 [ 57.907419][ T25] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.913415][ T25] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.919417][ T25] ? __ext4_mark_inode_dirty+0x940/0x940 [ 57.925066][ T25] ? do_writepages+0xfa/0x2a0 [ 57.929761][ T25] do_writepages+0xfa/0x2a0 [ 57.934284][ T25] ? page_writeback_cpu_online+0x10/0x10 [ 57.939938][ T25] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.945587][ T25] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.951584][ T25] ? lock_downgrade+0x840/0x840 [ 57.956481][ T25] __writeback_single_inode+0x12a/0x13d0 [ 57.962123][ T25] ? _raw_spin_unlock+0x24/0x40 [ 57.966979][ T25] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 57.972973][ T25] writeback_sb_inodes+0x515/0xdc0 [ 57.978115][ T25] ? __writeback_single_inode+0x13d0/0x13d0 [ 57.984053][ T25] __writeback_inodes_wb+0xc3/0x250 [ 57.989269][ T25] wb_writeback+0x8db/0xd50 [ 57.993799][ T25] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 58.000146][ T25] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 58.006139][ T25] ? cpumask_next+0x3c/0x40 [ 58.010653][ T25] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.015866][ T25] wb_workfn+0xab3/0x1090 [ 58.020211][ T25] ? inode_wait_for_writeback+0x30/0x30 [ 58.025775][ T25] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.031333][ T25] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.037332][ T25] process_one_work+0x965/0x1690 [ 58.042289][ T25] ? lock_release+0x800/0x800 [ 58.046976][ T25] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.052364][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 58.057322][ T25] worker_thread+0x96/0xe10 [ 58.061846][ T25] ? process_one_work+0x1690/0x1690 [ 58.067059][ T25] kthread+0x3b5/0x4a0 [ 58.071151][ T25] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.076875][ T25] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.082616][ T25] ret_from_fork+0x1f/0x30 [ 58.127462][ T25] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/25 [ 58.136830][ T25] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.142742][ T25] CPU: 1 PID: 25 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 58.151064][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.161138][ T25] Workqueue: writeback wb_workfn (flush-8:0) [ 58.167322][ T25] Call Trace: [ 58.170807][ T25] dump_stack+0x18f/0x20d [ 58.175159][ T25] check_preemption_disabled+0x20d/0x220 [ 58.180900][ T25] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.186034][ T25] ? ext4_find_extent+0x81a/0xad0 [ 58.191078][ T25] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.196546][ T25] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.202298][ T25] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.207605][ T25] ? ext4_ext_release+0x10/0x10 [ 58.212486][ T25] ? down_write_killable+0x170/0x170 [ 58.217777][ T25] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.223253][ T25] ext4_map_blocks+0x4cb/0x1640 [ 58.228121][ T25] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.233336][ T25] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.238891][ T25] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.245081][ T25] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.250557][ T25] ext4_writepages+0x1a7b/0x33c0 [ 58.255529][ T25] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.261197][ T25] ? __lock_acquire+0x2224/0x48b0 [ 58.266255][ T25] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.272249][ T25] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.278251][ T25] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.284074][ T25] ? do_writepages+0xfa/0x2a0 [ 58.288760][ T25] do_writepages+0xfa/0x2a0 [ 58.293283][ T25] ? page_writeback_cpu_online+0x10/0x10 [ 58.299090][ T25] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.304656][ T25] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.310641][ T25] ? lock_downgrade+0x840/0x840 [ 58.315509][ T25] __writeback_single_inode+0x12a/0x13d0 [ 58.321148][ T25] ? _raw_spin_unlock+0x24/0x40 [ 58.326016][ T25] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 58.332013][ T25] writeback_sb_inodes+0x515/0xdc0 [ 58.337147][ T25] ? __writeback_single_inode+0x13d0/0x13d0 [ 58.343071][ T25] __writeback_inodes_wb+0xc3/0x250 [ 58.348299][ T25] wb_writeback+0x8db/0xd50 [ 58.352919][ T25] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 58.359261][ T25] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 58.365169][ T25] ? cpumask_next+0x3c/0x40 [ 58.369684][ T25] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.374907][ T25] wb_workfn+0xab3/0x1090 [ 58.379250][ T25] ? inode_wait_for_writeback+0x30/0x30 [ 58.384813][ T25] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.390373][ T25] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.396719][ T25] process_one_work+0x965/0x1690 [ 58.401687][ T25] ? lock_release+0x800/0x800 [ 58.406368][ T25] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.411750][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 58.416712][ T25] worker_thread+0x96/0xe10 [ 58.421252][ T25] ? process_one_work+0x1690/0x1690 [ 58.426556][ T25] kthread+0x3b5/0x4a0 [ 58.430644][ T25] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.436369][ T25] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.442096][ T25] ret_from_fork+0x1f/0x30 [ 58.458022][ T25] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/25 [ 58.467227][ T25] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.473129][ T25] CPU: 1 PID: 25 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 58.481373][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.491445][ T25] Workqueue: writeback wb_workfn (flush-8:0) [ 58.497599][ T25] Call Trace: [ 58.500905][ T25] dump_stack+0x18f/0x20d [ 58.505278][ T25] check_preemption_disabled+0x20d/0x220 [ 58.510923][ T25] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.516049][ T25] ? ext4_find_extent+0x81a/0xad0 [ 58.521087][ T25] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.526551][ T25] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.532292][ T25] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.537942][ T25] ? ext4_ext_release+0x10/0x10 [ 58.537994][ T25] ? down_write_killable+0x170/0x170 [ 58.538010][ T25] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.538036][ T25] ext4_map_blocks+0x4cb/0x1640 [ 58.538062][ T25] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.538089][ T25] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.538108][ T25] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.538126][ T25] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.538148][ T25] ext4_writepages+0x1a7b/0x33c0 [ 58.538192][ T25] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.538209][ T25] ? __lock_acquire+0x2224/0x48b0 [ 58.538245][ T25] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.538269][ T25] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.538291][ T25] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.538309][ T25] ? do_writepages+0xfa/0x2a0 [ 58.538325][ T25] do_writepages+0xfa/0x2a0 [ 58.538350][ T25] ? page_writeback_cpu_online+0x10/0x10 [ 58.538376][ T25] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.538395][ T25] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.538412][ T25] ? lock_downgrade+0x840/0x840 [ 58.538436][ T25] __writeback_single_inode+0x12a/0x13d0 [ 58.538454][ T25] ? _raw_spin_unlock+0x24/0x40 [ 58.538472][ T25] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 58.538494][ T25] writeback_sb_inodes+0x515/0xdc0 [ 58.538527][ T25] ? __writeback_single_inode+0x13d0/0x13d0 [ 58.538568][ T25] __writeback_inodes_wb+0xc3/0x250 [ 58.538595][ T25] wb_writeback+0x8db/0xd50 [ 58.538624][ T25] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 58.538647][ T25] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 58.538670][ T25] ? cpumask_next+0x3c/0x40 [ 58.538689][ T25] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.538714][ T25] wb_workfn+0xab3/0x1090 [ 58.538740][ T25] ? inode_wait_for_writeback+0x30/0x30 [ 58.538772][ T25] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.538791][ T25] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.538817][ T25] process_one_work+0x965/0x1690 [ 58.538845][ T25] ? lock_release+0x800/0x800 [ 58.538863][ T25] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.538885][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 58.538913][ T25] worker_thread+0x96/0xe10 [ 58.538943][ T25] ? process_one_work+0x1690/0x1690 [ 58.538962][ T25] kthread+0x3b5/0x4a0 [ 58.538978][ T25] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.538994][ T25] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.539015][ T25] ret_from_fork+0x1f/0x30 [ 58.597130][ T25] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/25 [ 58.597169][ T25] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.597189][ T25] CPU: 1 PID: 25 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 58.597198][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.597214][ T25] Workqueue: writeback wb_workfn (flush-8:0) [ 58.597225][ T25] Call Trace: [ 58.597243][ T25] dump_stack+0x18f/0x20d [ 58.597268][ T25] check_preemption_disabled+0x20d/0x220 [ 58.597287][ T25] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.597307][ T25] ? ext4_find_extent+0x81a/0xad0 [ 58.597342][ T25] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.597359][ T25] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.597388][ T25] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.597417][ T25] ? ext4_ext_release+0x10/0x10 [ 58.597455][ T25] ? down_write_killable+0x170/0x170 [ 58.597472][ T25] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.597498][ T25] ext4_map_blocks+0x4cb/0x1640 [ 58.597523][ T25] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.597548][ T25] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.597567][ T25] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.597584][ T25] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.597606][ T25] ext4_writepages+0x1a7b/0x33c0 [ 58.597650][ T25] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.597667][ T25] ? __lock_acquire+0x2224/0x48b0 [ 58.597703][ T25] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.597727][ T25] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.597749][ T25] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.597766][ T25] ? do_writepages+0xfa/0x2a0 [ 58.597782][ T25] do_writepages+0xfa/0x2a0 [ 58.597807][ T25] ? page_writeback_cpu_online+0x10/0x10 [ 58.597831][ T25] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.597850][ T25] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.597866][ T25] ? lock_downgrade+0x840/0x840 [ 58.597898][ T25] __writeback_single_inode+0x12a/0x13d0 [ 58.597916][ T25] ? _raw_spin_unlock+0x24/0x40 [ 58.597933][ T25] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 58.597955][ T25] writeback_sb_inodes+0x515/0xdc0 [ 58.597988][ T25] ? __writeback_single_inode+0x13d0/0x13d0 [ 58.598029][ T25] __writeback_inodes_wb+0xc3/0x250 [ 58.598056][ T25] wb_writeback+0x8db/0xd50 [ 58.598084][ T25] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 58.598106][ T25] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 58.598128][ T25] ? cpumask_next+0x3c/0x40 [ 58.598146][ T25] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.598170][ T25] wb_workfn+0xab3/0x1090 [ 58.598196][ T25] ? inode_wait_for_writeback+0x30/0x30 [ 58.598221][ T25] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.598239][ T25] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.598265][ T25] process_one_work+0x965/0x1690 [ 58.598291][ T25] ? lock_release+0x800/0x800 [ 58.598309][ T25] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.598335][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 58.598363][ T25] worker_thread+0x96/0xe10 [ 58.598393][ T25] ? process_one_work+0x1690/0x1690 [ 58.598412][ T25] kthread+0x3b5/0x4a0 [ 58.598427][ T25] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.598442][ T25] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.598463][ T25] ret_from_fork+0x1f/0x30 [ 59.812307][ T6794] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6794 [ 59.821913][ T6794] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.828028][ T6794] CPU: 1 PID: 6794 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 [ 59.836710][ T6794] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.846742][ T6794] Call Trace: [ 59.850018][ T6794] dump_stack+0x18f/0x20d [ 59.854347][ T6794] check_preemption_disabled+0x20d/0x220 [ 59.859960][ T6794] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.865076][ T6794] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.870531][ T6794] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.876240][ T6794] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.881506][ T6794] ? ext4_ext_release+0x10/0x10 [ 59.886351][ T6794] ? down_write_killable+0x170/0x170 [ 59.891612][ T6794] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.897067][ T6794] ext4_map_blocks+0x4cb/0x1640 [ 59.901899][ T6794] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.907076][ T6794] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.912606][ T6794] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.918571][ T6794] ? prandom_u32_state+0xe/0x170 [ 59.923498][ T6794] ? __brelse+0x84/0xa0 [ 59.927632][ T6794] ? __ext4_new_inode+0x144/0x55e0 [ 59.932734][ T6794] ext4_getblk+0xad/0x520 [ 59.937065][ T6794] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.942763][ T6794] ? ext4_free_inode+0x1700/0x1700 [ 59.947853][ T6794] ext4_bread+0x7c/0x380 [ 59.952075][ T6794] ? ext4_getblk+0x520/0x520 [ 59.956647][ T6794] ? dquot_get_next_dqblk+0x180/0x180 [ 59.962007][ T6794] ext4_append+0x153/0x360 [ 59.966419][ T6794] ext4_mkdir+0x5e0/0xdf0 [ 59.970750][ T6794] ? ext4_rmdir+0xde0/0xde0 [ 59.975279][ T6794] ? security_inode_permission+0xc4/0xf0 [ 59.980900][ T6794] vfs_mkdir+0x419/0x690 [ 59.985128][ T6794] do_mkdirat+0x21e/0x280 [ 59.989440][ T6794] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.994282][ T6794] ? do_syscall_64+0x1c/0xe0 [ 59.999054][ T6794] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.005016][ T6794] do_syscall_64+0x60/0xe0 [ 60.009412][ T6794] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.015281][ T6794] RIP: 0033:0x7effcc3d3687 [ 60.019682][ T6794] Code: Bad RIP value. [ 60.023724][ T6794] RSP: 002b:00007ffef2bacc28 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 60.032120][ T6794] RAX: ffffffffffffffda RBX: 000056330ca92985 RCX: 00007effcc3d3687 [ 60.040254][ T6794] RDX: 00007ffef2bacaf0 RSI: 00000000000001ed RDI: 000056330ca92985 [ 60.048226][ T6794] RBP: 00007effcc3d3680 R08: 0000000000000100 R09: 0000000000000000 [ 60.056174][ T6794] R10: 000056330ca92980 R11: 0000000000000246 R12: 00000000000001ed [ 60.064127][ T6794] R13: 00007ffef2bacdb0 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.214' (ECDSA) to the list of known hosts. 2020/06/16 05:55:20 fuzzer started 2020/06/16 05:55:20 connecting to host at 10.128.0.26:43415 2020/06/16 05:55:20 checking machine... 2020/06/16 05:55:20 checking revisions... 2020/06/16 05:55:20 testing simple program... syzkaller login: [ 63.542317][ T6806] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6806 [ 63.551410][ T6806] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.557398][ T6806] CPU: 0 PID: 6806 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 63.565913][ T6806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.576141][ T6806] Call Trace: [ 63.579417][ T6806] dump_stack+0x18f/0x20d [ 63.583731][ T6806] check_preemption_disabled+0x20d/0x220 [ 63.589364][ T6806] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.594465][ T6806] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.599911][ T6806] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.605615][ T6806] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.610887][ T6806] ? ext4_ext_release+0x10/0x10 [ 63.615738][ T6806] ? down_write_killable+0x170/0x170 [ 63.621085][ T6806] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.626613][ T6806] ext4_map_blocks+0x4cb/0x1640 [ 63.631457][ T6806] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.636632][ T6806] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.642153][ T6806] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.648123][ T6806] ? prandom_u32_state+0xe/0x170 [ 63.653061][ T6806] ? __brelse+0x84/0xa0 [ 63.657209][ T6806] ? __ext4_new_inode+0x144/0x55e0 [ 63.662366][ T6806] ext4_getblk+0xad/0x520 [ 63.666683][ T6806] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 63.672399][ T6806] ? ext4_free_inode+0x1700/0x1700 [ 63.677493][ T6806] ext4_bread+0x7c/0x380 [ 63.681728][ T6806] ? ext4_getblk+0x520/0x520 [ 63.686305][ T6806] ? dquot_get_next_dqblk+0x180/0x180 [ 63.691661][ T6806] ext4_append+0x153/0x360 [ 63.696091][ T6806] ext4_mkdir+0x5e0/0xdf0 [ 63.700401][ T6806] ? ext4_rmdir+0xde0/0xde0 [ 63.704886][ T6806] ? security_inode_permission+0xc4/0xf0 [ 63.710498][ T6806] vfs_mkdir+0x419/0x690 [ 63.714730][ T6806] do_mkdirat+0x21e/0x280 [ 63.719048][ T6806] ? __ia32_sys_mknod+0xb0/0xb0 [ 63.723889][ T6806] ? do_syscall_64+0x1c/0xe0 [ 63.728601][ T6806] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.738220][ T6806] do_syscall_64+0x60/0xe0 [ 63.742719][ T6806] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.748591][ T6806] RIP: 0033:0x4b02a0 [ 63.752457][ T6806] Code: Bad RIP value. [ 63.756499][ T6806] RSP: 002b:000000c0000c94b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 63.764887][ T6806] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 63.772847][ T6806] RDX: 00000000000001c0 RSI: 000000c000026da0 RDI: ffffffffffffff9c [ 63.780816][ T6806] RBP: 000000c0000c9510 R08: 0000000000000000 R09: 0000000000000000 [ 63.788808][ T6806] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 63.796761][ T6806] R13: 000000000000006e R14: 000000000000006d R15: 0000000000000100 [ 63.812075][ T6818] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6818 [ 63.821581][ T6818] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.827740][ T6818] CPU: 0 PID: 6818 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 63.837018][ T6818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.847067][ T6818] Call Trace: [ 63.850780][ T6818] dump_stack+0x18f/0x20d [ 63.855097][ T6818] check_preemption_disabled+0x20d/0x220 [ 63.860708][ T6818] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.865813][ T6818] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.871261][ T6818] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.876993][ T6818] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.882263][ T6818] ? ext4_ext_release+0x10/0x10 [ 63.887106][ T6818] ? down_write_killable+0x170/0x170 [ 63.892367][ T6818] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.898085][ T6818] ext4_map_blocks+0x4cb/0x1640 [ 63.902917][ T6818] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.908180][ T6818] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.913704][ T6818] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.919837][ T6818] ? prandom_u32_state+0xe/0x170 [ 63.924752][ T6818] ? __brelse+0x84/0xa0 [ 63.928886][ T6818] ? __ext4_new_inode+0x144/0x55e0 [ 63.934671][ T6818] ext4_getblk+0xad/0x520 [ 63.938993][ T6818] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 63.944869][ T6818] ? ext4_free_inode+0x1700/0x1700 [ 63.949959][ T6818] ext4_bread+0x7c/0x380 [ 63.954192][ T6818] ? ext4_getblk+0x520/0x520 [ 63.958878][ T6818] ? dquot_get_next_dqblk+0x180/0x180 [ 63.964232][ T6818] ext4_append+0x153/0x360 [ 63.968639][ T6818] ext4_mkdir+0x5e0/0xdf0 [ 63.972964][ T6818] ? ext4_rmdir+0xde0/0xde0 [ 63.977462][ T6818] ? security_inode_permission+0xc4/0xf0 [ 63.983088][ T6818] vfs_mkdir+0x419/0x690 [ 63.987322][ T6818] do_mkdirat+0x21e/0x280 [ 63.991631][ T6818] ? __ia32_sys_mknod+0xb0/0xb0 [ 63.996466][ T6818] ? do_syscall_64+0x1c/0xe0 [ 64.001046][ T6818] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.007004][ T6818] do_syscall_64+0x60/0xe0 [ 64.011415][ T6818] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.017296][ T6818] RIP: 0033:0x45bed7 [ 64.021161][ T6818] Code: Bad RIP value. [ 64.025213][ T6818] RSP: 002b:00007ffd4125d9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 64.033608][ T6818] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 64.041555][ T6818] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffd4125dbd0 [ 64.049504][ T6818] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003180 [ 64.057465][ T6818] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 64.065426][ T6818] R13: 00007ffd4125dbd0 R14: 8421084210842109 R15: 00007ffd4125dbdc [ 64.152930][ T6819] IPVS: ftp: loaded support on port[0] = 21 [ 64.190296][ T6819] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6819 [ 64.199737][ T6819] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.205703][ T6819] CPU: 0 PID: 6819 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.214292][ T6819] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.224356][ T6819] Call Trace: [ 64.227771][ T6819] dump_stack+0x18f/0x20d [ 64.232099][ T6819] check_preemption_disabled+0x20d/0x220 [ 64.237737][ T6819] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.242845][ T6819] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.248283][ T6819] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.254037][ T6819] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.259320][ T6819] ? ext4_ext_release+0x10/0x10 [ 64.264174][ T6819] ? down_write_killable+0x170/0x170 [ 64.269436][ T6819] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.274876][ T6819] ext4_map_blocks+0x4cb/0x1640 [ 64.279734][ T6819] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.284924][ T6819] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.290463][ T6819] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.296418][ T6819] ? prandom_u32_state+0xe/0x170 [ 64.301345][ T6819] ? __brelse+0x84/0xa0 [ 64.305479][ T6819] ? __ext4_new_inode+0x144/0x55e0 [ 64.310569][ T6819] ext4_getblk+0xad/0x520 [ 64.314894][ T6819] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.320594][ T6819] ? ext4_free_inode+0x1700/0x1700 [ 64.325687][ T6819] ext4_bread+0x7c/0x380 [ 64.329914][ T6819] ? ext4_getblk+0x520/0x520 [ 64.334484][ T6819] ? dquot_get_next_dqblk+0x180/0x180 [ 64.339850][ T6819] ext4_append+0x153/0x360 [ 64.344246][ T6819] ext4_mkdir+0x5e0/0xdf0 [ 64.348558][ T6819] ? ext4_rmdir+0xde0/0xde0 [ 64.353043][ T6819] ? security_inode_permission+0xc4/0xf0 [ 64.358676][ T6819] vfs_mkdir+0x419/0x690 [ 64.362915][ T6819] do_mkdirat+0x21e/0x280 [ 64.367227][ T6819] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.372078][ T6819] ? do_syscall_64+0x1c/0xe0 [ 64.376672][ T6819] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.382664][ T6819] do_syscall_64+0x60/0xe0 [ 64.387142][ T6819] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.393029][ T6819] RIP: 0033:0x45bed7 [ 64.396912][ T6819] Code: Bad RIP value. [ 64.400971][ T6819] RSP: 002b:00007ffd4125d8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 64.409358][ T6819] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 64.417335][ T6819] RDX: 00007ffd4125d933 RSI: 00000000000001ff RDI: 00007ffd4125d930 [ 64.425304][ T6819] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 64.433271][ T6819] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185c0 [ 64.441220][ T6819] R13: 00007ffd4125d920 R14: 0000000000000000 R15: 00007ffd4125d930 [ 64.493837][ T6819] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6819 [ 64.503555][ T6819] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.509463][ T6819] CPU: 1 PID: 6819 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.518055][ T6819] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.528117][ T6819] Call Trace: [ 64.531420][ T6819] dump_stack+0x18f/0x20d [ 64.535770][ T6819] check_preemption_disabled+0x20d/0x220 [ 64.541418][ T6819] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.546556][ T6819] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.552031][ T6819] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.557787][ T6819] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.563078][ T6819] ? ext4_ext_release+0x10/0x10 [ 64.567928][ T6819] ? down_write_killable+0x170/0x170 [ 64.573326][ T6819] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.578797][ T6819] ext4_map_blocks+0x4cb/0x1640 [ 64.583664][ T6819] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.588869][ T6819] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.594418][ T6819] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.600530][ T6819] ? prandom_u32_state+0xe/0x170 [ 64.605454][ T6819] ? __brelse+0x84/0xa0 [ 64.609664][ T6819] ? __ext4_new_inode+0x144/0x55e0 [ 64.614803][ T6819] ext4_getblk+0xad/0x520 [ 64.619138][ T6819] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.624851][ T6819] ? ext4_free_inode+0x1700/0x1700 [ 64.629951][ T6819] ext4_bread+0x7c/0x380 [ 64.634176][ T6819] ? ext4_getblk+0x520/0x520 [ 64.638749][ T6819] ? dquot_get_next_dqblk+0x180/0x180 [ 64.644218][ T6819] ext4_append+0x153/0x360 [ 64.648624][ T6819] ext4_mkdir+0x5e0/0xdf0 [ 64.653049][ T6819] ? ext4_rmdir+0xde0/0xde0 [ 64.657541][ T6819] ? security_inode_permission+0xc4/0xf0 [ 64.663162][ T6819] vfs_mkdir+0x419/0x690 [ 64.667396][ T6819] do_mkdirat+0x21e/0x280 [ 64.671707][ T6819] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.676538][ T6819] ? do_syscall_64+0x1c/0xe0 [ 64.681109][ T6819] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.687088][ T6819] do_syscall_64+0x60/0xe0 [ 64.691486][ T6819] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.697363][ T6819] RIP: 0033:0x45bed7 [ 64.701250][ T6819] Code: Bad RIP value. [ 64.705294][ T6819] RSP: 002b:00007ffd4125d8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 64.713697][ T6819] RAX: ffffffffffffffda RBX: 000000000000fbe8 RCX: 000000000045bed7 [ 64.721661][ T6819] RDX: 00007ffd4125d933 RSI: 00000000000001ff RDI: 00007ffd4125d930 [ 64.729611][ T6819] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 2020/06/16 05:55:22 building call list... [ 64.737563][ T6819] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 64.745514][ T6819] R13: 00007ffd4125d920 R14: 000000000000fbe2 R15: 00007ffd4125d930 [ 64.993082][ T207] tipc: TX() has been purged, node left! [ 65.485340][ T207] ================================================================== [ 65.493587][ T207] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 65.501474][ T207] Write of size 1 at addr ffff8880a7f449e4 by task kworker/u4:4/207 [ 65.509434][ T207] [ 65.511766][ T207] CPU: 0 PID: 207 Comm: kworker/u4:4 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.520081][ T207] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.530140][ T207] Workqueue: netns cleanup_net [ 65.534899][ T207] Call Trace: [ 65.538211][ T207] dump_stack+0x18f/0x20d [ 65.542543][ T207] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.548083][ T207] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.553625][ T207] ? afs_put_call+0xa40/0xa40 [ 65.558301][ T207] print_address_description.constprop.0.cold+0xd3/0x413 [ 65.565327][ T207] ? vprintk_func+0x97/0x1a6 [ 65.569921][ T207] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.575466][ T207] kasan_report.cold+0x1f/0x37 [ 65.580254][ T207] ? rcu_read_lock_held_common+0x51/0xa0 [ 65.585901][ T207] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.591454][ T207] afs_wake_up_async_call+0x6aa/0x770 [ 65.596825][ T207] ? afs_close_socket+0x320/0x320 [ 65.601871][ T207] ? afs_put_call+0xa40/0xa40 [ 65.606546][ T207] rxrpc_notify_socket+0x1db/0x5d0 [ 65.611680][ T207] ? afs_put_call+0xa40/0xa40 [ 65.616358][ T207] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 65.622803][ T207] rxrpc_call_completed+0xca/0xf0 [ 65.627832][ T207] rxrpc_discard_prealloc+0x781/0xab0 [ 65.633208][ T207] ? lock_sock_nested+0x94/0x110 [ 65.638187][ T207] rxrpc_listen+0x147/0x360 [ 65.642711][ T207] afs_close_socket+0x95/0x320 [ 65.647473][ T207] ? afs_purge_servers+0x16d/0x300 [ 65.652586][ T207] ? afs_rx_discard_new_call+0x50/0x50 [ 65.658054][ T207] ? init_wait_var_entry+0x200/0x200 [ 65.663353][ T207] ? rcu_read_lock_held_common+0xa0/0xa0 [ 65.669083][ T207] ? check_preemption_disabled+0x38/0x220 [ 65.674813][ T207] afs_net_exit+0x1bc/0x310 [ 65.679338][ T207] ? afs_net_init+0xe30/0xe30 [ 65.684014][ T207] ops_exit_list.isra.0+0xa8/0x150 [ 65.689128][ T207] cleanup_net+0x511/0xa50 [ 65.693546][ T207] ? unregister_pernet_device+0x70/0x70 [ 65.699122][ T207] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.705110][ T207] process_one_work+0x965/0x1690 [ 65.710061][ T207] ? lock_release+0x800/0x800 [ 65.714740][ T207] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.720116][ T207] ? rwlock_bug.part.0+0x90/0x90 [ 65.725088][ T207] worker_thread+0x96/0xe10 [ 65.729620][ T207] ? process_one_work+0x1690/0x1690 [ 65.734825][ T207] kthread+0x3b5/0x4a0 [ 65.738892][ T207] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.744609][ T207] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.750350][ T207] ret_from_fork+0x1f/0x30 [ 65.754776][ T207] [ 65.757100][ T207] Allocated by task 6819: [ 65.761425][ T207] save_stack+0x1b/0x40 [ 65.765578][ T207] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 65.771204][ T207] kmem_cache_alloc_trace+0x153/0x7d0 [ 65.776570][ T207] afs_alloc_call+0x55/0x630 [ 65.781174][ T207] afs_charge_preallocation+0xe9/0x2d0 [ 65.786632][ T207] afs_open_socket+0x292/0x360 [ 65.791394][ T207] afs_net_init+0xa6c/0xe30 [ 65.795894][ T207] ops_init+0xaf/0x420 [ 65.799958][ T207] setup_net+0x2de/0x860 [ 65.804196][ T207] copy_net_ns+0x293/0x590 [ 65.808607][ T207] create_new_namespaces+0x3fb/0xb30 [ 65.813930][ T207] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 65.819592][ T207] ksys_unshare+0x43d/0x8e0 [ 65.824109][ T207] __x64_sys_unshare+0x2d/0x40 [ 65.828877][ T207] do_syscall_64+0x60/0xe0 [ 65.833316][ T207] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.839196][ T207] [ 65.841518][ T207] Freed by task 207: [ 65.845409][ T207] save_stack+0x1b/0x40 [ 65.849560][ T207] __kasan_slab_free+0xf7/0x140 [ 65.854409][ T207] kfree+0x109/0x2b0 [ 65.858298][ T207] afs_put_call+0x585/0xa40 [ 65.862799][ T207] rxrpc_discard_prealloc+0x764/0xab0 [ 65.868173][ T207] rxrpc_listen+0x147/0x360 [ 65.872691][ T207] afs_close_socket+0x95/0x320 [ 65.877449][ T207] afs_net_exit+0x1bc/0x310 [ 65.881954][ T207] ops_exit_list.isra.0+0xa8/0x150 [ 65.887062][ T207] cleanup_net+0x511/0xa50 [ 65.891502][ T207] process_one_work+0x965/0x1690 [ 65.896435][ T207] worker_thread+0x96/0xe10 [ 65.901023][ T207] kthread+0x3b5/0x4a0 [ 65.905098][ T207] ret_from_fork+0x1f/0x30 [ 65.909499][ T207] [ 65.911826][ T207] The buggy address belongs to the object at ffff8880a7f44800 [ 65.911826][ T207] which belongs to the cache kmalloc-1k of size 1024 [ 65.925874][ T207] The buggy address is located 484 bytes inside of [ 65.925874][ T207] 1024-byte region [ffff8880a7f44800, ffff8880a7f44c00) [ 65.939579][ T207] The buggy address belongs to the page: [ 65.945219][ T207] page:ffffea00029fd100 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 65.954331][ T207] flags: 0xfffe0000000200(slab) [ 65.959189][ T207] raw: 00fffe0000000200 ffffea00029a1c48 ffffea00025324c8 ffff8880aa000c40 [ 65.967777][ T207] raw: 0000000000000000 ffff8880a7f44000 0000000100000002 0000000000000000 [ 65.976348][ T207] page dumped because: kasan: bad access detected [ 65.982749][ T207] [ 65.985069][ T207] Memory state around the buggy address: [ 65.990700][ T207] ffff8880a7f44880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.998759][ T207] ffff8880a7f44900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.006818][ T207] >ffff8880a7f44980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.014871][ T207] ^ [ 66.022062][ T207] ffff8880a7f44a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.030123][ T207] ffff8880a7f44a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.038261][ T207] ================================================================== [ 66.046329][ T207] Disabling lock debugging due to kernel taint [ 66.052559][ T207] Kernel panic - not syncing: panic_on_warn set ... [ 66.059153][ T207] CPU: 0 PID: 207 Comm: kworker/u4:4 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 66.068896][ T207] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.078959][ T207] Workqueue: netns cleanup_net [ 66.083715][ T207] Call Trace: [ 66.087006][ T207] dump_stack+0x18f/0x20d [ 66.091370][ T207] ? afs_wake_up_async_call+0x670/0x770 [ 66.096916][ T207] ? afs_put_call+0xa40/0xa40 [ 66.101592][ T207] panic+0x2e3/0x75c [ 66.105489][ T207] ? __warn_printk+0xf3/0xf3 [ 66.110078][ T207] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 66.116246][ T207] ? trace_hardirqs_on+0x55/0x220 [ 66.121272][ T207] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.126812][ T207] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.132348][ T207] ? afs_put_call+0xa40/0xa40 [ 66.137016][ T207] end_report+0x4d/0x53 [ 66.141163][ T207] kasan_report.cold+0xd/0x37 [ 66.145836][ T207] ? rcu_read_lock_held_common+0x51/0xa0 [ 66.151459][ T207] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.156998][ T207] afs_wake_up_async_call+0x6aa/0x770 [ 66.162358][ T207] ? afs_close_socket+0x320/0x320 [ 66.167377][ T207] ? afs_put_call+0xa40/0xa40 [ 66.172052][ T207] rxrpc_notify_socket+0x1db/0x5d0 [ 66.177171][ T207] ? afs_put_call+0xa40/0xa40 [ 66.181848][ T207] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 66.188258][ T207] rxrpc_call_completed+0xca/0xf0 [ 66.193282][ T207] rxrpc_discard_prealloc+0x781/0xab0 [ 66.198651][ T207] ? lock_sock_nested+0x94/0x110 [ 66.203581][ T207] rxrpc_listen+0x147/0x360 [ 66.208087][ T207] afs_close_socket+0x95/0x320 [ 66.212842][ T207] ? afs_purge_servers+0x16d/0x300 [ 66.217946][ T207] ? afs_rx_discard_new_call+0x50/0x50 [ 66.223403][ T207] ? init_wait_var_entry+0x200/0x200 [ 66.228682][ T207] ? rcu_read_lock_held_common+0xa0/0xa0 [ 66.234306][ T207] ? check_preemption_disabled+0x38/0x220 [ 66.240018][ T207] afs_net_exit+0x1bc/0x310 [ 66.244511][ T207] ? afs_net_init+0xe30/0xe30 [ 66.249178][ T207] ops_exit_list.isra.0+0xa8/0x150 [ 66.254306][ T207] cleanup_net+0x511/0xa50 [ 66.258714][ T207] ? unregister_pernet_device+0x70/0x70 [ 66.264253][ T207] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.270231][ T207] process_one_work+0x965/0x1690 [ 66.275166][ T207] ? lock_release+0x800/0x800 [ 66.279835][ T207] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.285200][ T207] ? rwlock_bug.part.0+0x90/0x90 [ 66.290132][ T207] worker_thread+0x96/0xe10 [ 66.294654][ T207] ? process_one_work+0x1690/0x1690 [ 66.299843][ T207] kthread+0x3b5/0x4a0 [ 66.303906][ T207] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.309615][ T207] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.315328][ T207] ret_from_fork+0x1f/0x30 [ 66.321130][ T207] Kernel Offset: disabled [ 66.325451][ T207] Rebooting in 86400 seconds..