[ 58.730473][ T166] ? _raw_spin_unlock+0x24/0x40 [ 58.735417][ T166] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 58.741411][ T166] writeback_sb_inodes+0x515/0xdc0 [ 58.746546][ T166] ? __writeback_single_inode+0x13d0/0x13d0 [ 58.752506][ T166] __writeback_inodes_wb+0xc3/0x250 [ 58.757731][ T166] wb_writeback+0x8db/0xd50 [ 58.762342][ T166] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 58.769637][ T166] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 58.775546][ T166] ? cpumask_next+0x3c/0x40 [ 58.780059][ T166] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.785276][ T166] wb_workfn+0xab3/0x1090 [ 58.789621][ T166] ? inode_wait_for_writeback+0x30/0x30 [ 58.795204][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.800764][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.806762][ T166] process_one_work+0x965/0x1690 [ 58.811720][ T166] ? lock_release+0x800/0x800 [ 58.816406][ T166] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.821789][ T166] ? rwlock_bug.part.0+0x90/0x90 [ 58.826831][ T166] worker_thread+0x96/0xe10 [ 58.831363][ T166] ? process_one_work+0x1690/0x1690 [ 58.836570][ T166] kthread+0x3b5/0x4a0 [ 58.840907][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.846639][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.852378][ T166] ret_from_fork+0x1f/0x30 [ 59.617683][ T6806] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6806 [ 59.627459][ T6806] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.634733][ T6806] CPU: 1 PID: 6806 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 [ 59.643320][ T6806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.653359][ T6806] Call Trace: [ 59.656638][ T6806] dump_stack+0x18f/0x20d [ 59.660959][ T6806] check_preemption_disabled+0x20d/0x220 [ 59.666579][ T6806] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.671792][ T6806] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.677235][ T6806] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.682939][ T6806] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.688210][ T6806] ? ext4_ext_release+0x10/0x10 [ 59.693056][ T6806] ? down_write_killable+0x170/0x170 [ 59.698422][ T6806] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.703862][ T6806] ext4_map_blocks+0x4cb/0x1640 [ 59.708693][ T6806] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.713868][ T6806] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.719393][ T6806] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.725365][ T6806] ? prandom_u32_state+0xe/0x170 [ 59.730289][ T6806] ? __brelse+0x84/0xa0 [ 59.734452][ T6806] ? __ext4_new_inode+0x144/0x55e0 [ 59.739546][ T6806] ext4_getblk+0xad/0x520 [ 59.743858][ T6806] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.749560][ T6806] ? ext4_free_inode+0x1700/0x1700 [ 59.754669][ T6806] ext4_bread+0x7c/0x380 [ 59.758888][ T6806] ? ext4_getblk+0x520/0x520 [ 59.763465][ T6806] ? dquot_get_next_dqblk+0x180/0x180 [ 59.768816][ T6806] ext4_append+0x153/0x360 [ 59.773211][ T6806] ext4_mkdir+0x5e0/0xdf0 [ 59.777521][ T6806] ? ext4_rmdir+0xde0/0xde0 [ 59.782003][ T6806] ? security_inode_permission+0xc4/0xf0 [ 59.787617][ T6806] vfs_mkdir+0x419/0x690 [ 59.791841][ T6806] do_mkdirat+0x21e/0x280 [ 59.796154][ T6806] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.800984][ T6806] ? do_syscall_64+0x1c/0xe0 [ 59.805570][ T6806] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.811546][ T6806] do_syscall_64+0x60/0xe0 [ 59.815949][ T6806] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.821883][ T6806] RIP: 0033:0x7f7e8fb9b687 [ 59.826284][ T6806] Code: Bad RIP value. [ 59.830357][ T6806] RSP: 002b:00007fffe24fa618 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 59.838774][ T6806] RAX: ffffffffffffffda RBX: 000055a3f71c4985 RCX: 00007f7e8fb9b687 [ 59.846739][ T6806] RDX: 00007fffe24fa4e0 RSI: 00000000000001ed RDI: 000055a3f71c4985 [ 59.854693][ T6806] RBP: 00007f7e8fb9b680 R08: 0000000000000100 R09: 0000000000000000 [ 59.862647][ T6806] R10: 000055a3f71c4980 R11: 0000000000000246 R12: 00000000000001ed [ 59.870597][ T6806] R13: 00007fffe24fa7a0 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.11' (ECDSA) to the list of known hosts. syzkaller login: [ 63.892777][ T166] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:4/166 [ 63.902374][ T166] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.908269][ T166] CPU: 0 PID: 166 Comm: kworker/u4:4 Not tainted 5.8.0-rc1-syzkaller #0 [ 63.916606][ T166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.926655][ T166] Workqueue: writeback wb_workfn (flush-8:0) [ 63.932624][ T166] Call Trace: [ 63.935903][ T166] dump_stack+0x18f/0x20d [ 63.940240][ T166] check_preemption_disabled+0x20d/0x220 [ 63.945877][ T166] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.950978][ T166] ? ext4_find_extent+0x81a/0xad0 [ 63.955995][ T166] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.961435][ T166] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.967144][ T166] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.972421][ T166] ? ext4_ext_release+0x10/0x10 [ 63.977269][ T166] ? down_write_killable+0x170/0x170 [ 63.982546][ T166] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.987990][ T166] ext4_map_blocks+0x4cb/0x1640 [ 63.992841][ T166] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.998029][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.003569][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.009533][ T166] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.014976][ T166] ext4_writepages+0x1a7b/0x33c0 [ 64.019918][ T166] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.025535][ T166] ? __lock_acquire+0x2224/0x48b0 [ 64.030644][ T166] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.036614][ T166] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.042582][ T166] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.048197][ T166] ? do_writepages+0xfa/0x2a0 [ 64.052856][ T166] do_writepages+0xfa/0x2a0 [ 64.057347][ T166] ? page_writeback_cpu_online+0x10/0x10 [ 64.062968][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.068507][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.074467][ T166] ? lock_downgrade+0x840/0x840 [ 64.079316][ T166] __writeback_single_inode+0x12a/0x13d0 [ 64.085024][ T166] ? _raw_spin_unlock+0x24/0x40 [ 64.090207][ T166] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.096174][ T166] writeback_sb_inodes+0x515/0xdc0 [ 64.101292][ T166] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.107273][ T166] __writeback_inodes_wb+0xc3/0x250 [ 64.112460][ T166] wb_writeback+0x8db/0xd50 [ 64.116960][ T166] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.123279][ T166] ? cpumask_next+0x3c/0x40 [ 64.127766][ T166] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.132950][ T166] wb_workfn+0x9bc/0x1090 [ 64.137268][ T166] ? inode_wait_for_writeback+0x30/0x30 [ 64.142813][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.148343][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.154485][ T166] process_one_work+0x965/0x1690 [ 64.159413][ T166] ? lock_release+0x800/0x800 [ 64.164075][ T166] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.169430][ T166] ? rwlock_bug.part.0+0x90/0x90 [ 64.174366][ T166] worker_thread+0x96/0xe10 [ 64.178873][ T166] ? process_one_work+0x1690/0x1690 [ 64.184061][ T166] kthread+0x3b5/0x4a0 [ 64.188113][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.193822][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.199526][ T166] ret_from_fork+0x1f/0x30 [ 64.207063][ T166] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:4/166 [ 64.216544][ T166] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.222523][ T166] CPU: 0 PID: 166 Comm: kworker/u4:4 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.230848][ T166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.240918][ T166] Workqueue: writeback wb_workfn (flush-8:0) [ 64.246907][ T166] Call Trace: [ 64.250208][ T166] dump_stack+0x18f/0x20d [ 64.254558][ T166] check_preemption_disabled+0x20d/0x220 [ 64.260287][ T166] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.265414][ T166] ? ext4_find_extent+0x81a/0xad0 [ 64.270461][ T166] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.275931][ T166] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.281679][ T166] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.287090][ T166] ? ext4_ext_release+0x10/0x10 [ 64.292298][ T166] ? down_write_killable+0x170/0x170 [ 64.298108][ T166] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.303945][ T166] ext4_map_blocks+0x4cb/0x1640 [ 64.309016][ T166] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.314220][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.319855][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.325845][ T166] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.331323][ T166] ext4_writepages+0x1a7b/0x33c0 [ 64.336312][ T166] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.341960][ T166] ? __lock_acquire+0x2224/0x48b0 [ 64.347015][ T166] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.353011][ T166] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.359004][ T166] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.364653][ T166] ? do_writepages+0xfa/0x2a0 [ 64.369333][ T166] do_writepages+0xfa/0x2a0 [ 64.373852][ T166] ? page_writeback_cpu_online+0x10/0x10 [ 64.379584][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.385139][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.391119][ T166] ? lock_downgrade+0x840/0x840 [ 64.396066][ T166] __writeback_single_inode+0x12a/0x13d0 [ 64.401718][ T166] ? _raw_spin_unlock+0x24/0x40 [ 64.406584][ T166] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.412587][ T166] writeback_sb_inodes+0x515/0xdc0 [ 64.417721][ T166] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.423646][ T166] __writeback_inodes_wb+0xc3/0x250 [ 64.428859][ T166] wb_writeback+0x8db/0xd50 [ 64.433376][ T166] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.439827][ T166] ? cpumask_next+0x3c/0x40 [ 64.444336][ T166] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.449548][ T166] wb_workfn+0x9bc/0x1090 [ 64.453900][ T166] ? inode_wait_for_writeback+0x30/0x30 [ 64.459462][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.465105][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.471100][ T166] process_one_work+0x965/0x1690 [ 64.476077][ T166] ? lock_release+0x800/0x800 [ 64.480757][ T166] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.486479][ T166] ? rwlock_bug.part.0+0x90/0x90 2020/06/18 05:56:50 fuzzer started [ 64.491602][ T166] worker_thread+0x96/0xe10 [ 64.496122][ T166] ? process_one_work+0x1690/0x1690 [ 64.501391][ T166] kthread+0x3b5/0x4a0 [ 64.505469][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.511198][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.517066][ T166] ret_from_fork+0x1f/0x30 [ 64.546456][ T166] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:4/166 [ 64.555682][ T166] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.561590][ T166] CPU: 0 PID: 166 Comm: kworker/u4:4 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.569916][ T166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.580012][ T166] Workqueue: writeback wb_workfn (flush-8:0) [ 64.586084][ T166] Call Trace: [ 64.589385][ T166] dump_stack+0x18f/0x20d [ 64.593733][ T166] check_preemption_disabled+0x20d/0x220 [ 64.599379][ T166] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.604512][ T166] ? ext4_find_extent+0x81a/0xad0 [ 64.609562][ T166] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.615031][ T166] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.620774][ T166] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.626120][ T166] ? ext4_ext_release+0x10/0x10 [ 64.631367][ T166] ? down_write_killable+0x170/0x170 [ 64.636673][ T166] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.642152][ T166] ext4_map_blocks+0x4cb/0x1640 [ 64.647020][ T166] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.652328][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.657920][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.663912][ T166] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.669383][ T166] ext4_writepages+0x1a7b/0x33c0 [ 64.674372][ T166] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.680019][ T166] ? __lock_acquire+0x2224/0x48b0 [ 64.685072][ T166] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.691067][ T166] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.697237][ T166] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.702880][ T166] ? do_writepages+0xfa/0x2a0 [ 64.707577][ T166] do_writepages+0xfa/0x2a0 [ 64.712099][ T166] ? page_writeback_cpu_online+0x10/0x10 [ 64.717747][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.723302][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.729288][ T166] ? lock_downgrade+0x840/0x840 [ 64.734153][ T166] __writeback_single_inode+0x12a/0x13d0 [ 64.739782][ T166] ? _raw_spin_unlock+0x24/0x40 [ 64.744633][ T166] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.750620][ T166] writeback_sb_inodes+0x515/0xdc0 [ 64.756331][ T166] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.762253][ T166] __writeback_inodes_wb+0xc3/0x250 [ 64.767471][ T166] wb_writeback+0x8db/0xd50 [ 64.772251][ T166] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.778599][ T166] ? cpumask_next+0x3c/0x40 [ 64.783113][ T166] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.788328][ T166] wb_workfn+0x9bc/0x1090 [ 64.792676][ T166] ? inode_wait_for_writeback+0x30/0x30 [ 64.798239][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.803788][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.809754][ T166] process_one_work+0x965/0x1690 [ 64.814683][ T166] ? lock_release+0x800/0x800 [ 64.819348][ T166] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.824718][ T166] ? rwlock_bug.part.0+0x90/0x90 [ 64.829662][ T166] worker_thread+0x96/0xe10 [ 64.834191][ T166] ? process_one_work+0x1690/0x1690 [ 64.839835][ T166] kthread+0x3b5/0x4a0 2020/06/18 05:56:50 connecting to host at 10.128.0.26:36751 2020/06/18 05:56:50 checking machine... 2020/06/18 05:56:50 checking revisions... [ 64.844165][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.849890][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.855619][ T166] ret_from_fork+0x1f/0x30 [ 64.880213][ T166] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:4/166 [ 64.889463][ T166] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.895487][ T166] CPU: 0 PID: 166 Comm: kworker/u4:4 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.903858][ T166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.913937][ T166] Workqueue: writeback wb_workfn (flush-8:0) [ 64.919919][ T166] Call Trace: [ 64.923218][ T166] dump_stack+0x18f/0x20d [ 64.927584][ T166] check_preemption_disabled+0x20d/0x220 [ 64.933232][ T166] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.938357][ T166] ? ext4_find_extent+0x81a/0xad0 [ 64.943495][ T166] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.948970][ T166] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.954706][ T166] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.960010][ T166] ? ext4_ext_release+0x10/0x10 [ 64.964888][ T166] ? down_write_killable+0x170/0x170 [ 64.970176][ T166] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.975647][ T166] ext4_map_blocks+0x4cb/0x1640 [ 64.980513][ T166] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.985743][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.991297][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 2020/06/18 05:56:50 testing simple program... [ 64.997675][ T166] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 65.003245][ T166] ext4_writepages+0x1a7b/0x33c0 [ 65.008669][ T166] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.014490][ T166] ? __lock_acquire+0x2224/0x48b0 [ 65.019630][ T166] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.025627][ T166] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.031709][ T166] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.037360][ T166] ? do_writepages+0xfa/0x2a0 [ 65.042045][ T166] do_writepages+0xfa/0x2a0 [ 65.046586][ T166] ? page_writeback_cpu_online+0x10/0x10 [ 65.052865][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.058715][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.064701][ T166] ? lock_downgrade+0x840/0x840 [ 65.069567][ T166] __writeback_single_inode+0x12a/0x13d0 [ 65.075204][ T166] ? _raw_spin_unlock+0x24/0x40 [ 65.080057][ T166] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 65.086046][ T166] writeback_sb_inodes+0x515/0xdc0 [ 65.091191][ T166] ? __writeback_single_inode+0x13d0/0x13d0 [ 65.097132][ T166] __writeback_inodes_wb+0xc3/0x250 [ 65.102352][ T166] wb_writeback+0x8db/0xd50 [ 65.106882][ T166] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 65.113223][ T166] ? cpumask_next+0x3c/0x40 [ 65.117762][ T166] ? get_nr_dirty_inodes+0xd6/0x130 [ 65.122972][ T166] wb_workfn+0x9bc/0x1090 [ 65.127347][ T166] ? inode_wait_for_writeback+0x30/0x30 [ 65.132907][ T166] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.138459][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.144448][ T166] process_one_work+0x965/0x1690 [ 65.149431][ T166] ? lock_release+0x800/0x800 [ 65.154113][ T166] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.159498][ T166] ? rwlock_bug.part.0+0x90/0x90 [ 65.164625][ T166] worker_thread+0x96/0xe10 [ 65.169141][ T166] ? process_one_work+0x1690/0x1690 [ 65.174516][ T166] kthread+0x3b5/0x4a0 [ 65.178587][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.184306][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.190033][ T166] ret_from_fork+0x1f/0x30 [ 65.264091][ T6828] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6828 [ 65.273540][ T6828] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.279431][ T6828] CPU: 0 PID: 6828 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 65.287667][ T6828] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.297860][ T6828] Call Trace: [ 65.301166][ T6828] dump_stack+0x18f/0x20d [ 65.305496][ T6828] check_preemption_disabled+0x20d/0x220 [ 65.311109][ T6828] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.316216][ T6828] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.322086][ T6828] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.327804][ T6828] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.333085][ T6828] ? ext4_ext_release+0x10/0x10 [ 65.337935][ T6828] ? down_write_killable+0x170/0x170 [ 65.343208][ T6828] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.348687][ T6828] ext4_map_blocks+0x4cb/0x1640 [ 65.353788][ T6828] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.358968][ T6828] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.364512][ T6828] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.370657][ T6828] ? prandom_u32_state+0xe/0x170 [ 65.375689][ T6828] ? __brelse+0x84/0xa0 [ 65.379822][ T6828] ? __ext4_new_inode+0x144/0x55e0 [ 65.385368][ T6828] ext4_getblk+0xad/0x520 [ 65.389696][ T6828] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.395395][ T6828] ? ext4_free_inode+0x1700/0x1700 [ 65.400487][ T6828] ext4_bread+0x7c/0x380 [ 65.404727][ T6828] ? ext4_getblk+0x520/0x520 [ 65.409313][ T6828] ? dquot_get_next_dqblk+0x180/0x180 [ 65.414710][ T6828] ext4_append+0x153/0x360 [ 65.419113][ T6828] ext4_mkdir+0x5e0/0xdf0 [ 65.423439][ T6828] ? ext4_rmdir+0xde0/0xde0 [ 65.427935][ T6828] ? security_inode_permission+0xc4/0xf0 [ 65.433587][ T6828] vfs_mkdir+0x419/0x690 [ 65.437816][ T6828] do_mkdirat+0x21e/0x280 [ 65.442218][ T6828] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.447076][ T6828] ? do_syscall_64+0x1c/0xe0 [ 65.451740][ T6828] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.457727][ T6828] do_syscall_64+0x60/0xe0 [ 65.462133][ T6828] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.468017][ T6828] RIP: 0033:0x4b02a0 [ 65.471882][ T6828] Code: Bad RIP value. [ 65.475923][ T6828] RSP: 002b:000000c0000754b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 65.484345][ T6828] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 65.492293][ T6828] RDX: 00000000000001c0 RSI: 000000c0000aea80 RDI: ffffffffffffff9c [ 65.500256][ T6828] RBP: 000000c000075510 R08: 0000000000000000 R09: 0000000000000000 [ 65.508402][ T6828] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 65.516362][ T6828] R13: 0000000000000055 R14: 0000000000000054 R15: 0000000000000100 [ 65.531146][ T6832] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6832 [ 65.540654][ T6832] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.546659][ T6832] CPU: 0 PID: 6832 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.555242][ T6832] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.565275][ T6832] Call Trace: [ 65.568549][ T6832] dump_stack+0x18f/0x20d [ 65.572873][ T6832] check_preemption_disabled+0x20d/0x220 [ 65.578495][ T6832] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.583590][ T6832] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.589030][ T6832] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.594729][ T6832] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.600008][ T6832] ? ext4_ext_release+0x10/0x10 [ 65.604847][ T6832] ? down_write_killable+0x170/0x170 [ 65.610110][ T6832] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.615670][ T6832] ext4_map_blocks+0x4cb/0x1640 [ 65.620530][ T6832] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.625714][ T6832] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.631239][ T6832] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.637195][ T6832] ? prandom_u32_state+0xe/0x170 [ 65.642111][ T6832] ? __brelse+0x84/0xa0 [ 65.646243][ T6832] ? __ext4_new_inode+0x144/0x55e0 [ 65.651697][ T6832] ext4_getblk+0xad/0x520 [ 65.656012][ T6832] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.661821][ T6832] ? ext4_free_inode+0x1700/0x1700 [ 65.666911][ T6832] ext4_bread+0x7c/0x380 [ 65.671131][ T6832] ? ext4_getblk+0x520/0x520 [ 65.675704][ T6832] ? dquot_get_next_dqblk+0x180/0x180 [ 65.681066][ T6832] ext4_append+0x153/0x360 [ 65.685474][ T6832] ext4_mkdir+0x5e0/0xdf0 [ 65.689797][ T6832] ? ext4_rmdir+0xde0/0xde0 [ 65.694280][ T6832] ? security_inode_permission+0xc4/0xf0 [ 65.699897][ T6832] vfs_mkdir+0x419/0x690 [ 65.704121][ T6832] do_mkdirat+0x21e/0x280 [ 65.708439][ T6832] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.713272][ T6832] ? do_syscall_64+0x1c/0xe0 [ 65.717965][ T6832] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.723924][ T6832] do_syscall_64+0x60/0xe0 [ 65.728321][ T6832] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.734191][ T6832] RIP: 0033:0x45bed7 [ 65.738056][ T6832] Code: Bad RIP value. [ 65.742111][ T6832] RSP: 002b:00007ffd2a34aa88 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 65.750515][ T6832] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 65.758466][ T6832] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffd2a34ac60 [ 65.766413][ T6832] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000002f80 [ 65.774362][ T6832] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 65.782309][ T6832] R13: 00007ffd2a34ac60 R14: 8421084210842109 R15: 00007ffd2a34ac6c [ 65.870320][ T6833] IPVS: ftp: loaded support on port[0] = 21 [ 65.908038][ T6833] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6833 [ 65.917665][ T6833] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.923666][ T6833] CPU: 1 PID: 6833 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.932241][ T6833] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.942527][ T6833] Call Trace: [ 65.945841][ T6833] dump_stack+0x18f/0x20d [ 65.950171][ T6833] check_preemption_disabled+0x20d/0x220 [ 65.955802][ T6833] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.961007][ T6833] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.966446][ T6833] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.972160][ T6833] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.977440][ T6833] ? ext4_ext_release+0x10/0x10 [ 65.982293][ T6833] ? down_write_killable+0x170/0x170 [ 65.987642][ T6833] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.993083][ T6833] ext4_map_blocks+0x4cb/0x1640 [ 65.997914][ T6833] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.003089][ T6833] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.008612][ T6833] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.014569][ T6833] ? prandom_u32_state+0xe/0x170 [ 66.019496][ T6833] ? __brelse+0x84/0xa0 [ 66.023656][ T6833] ? __ext4_new_inode+0x144/0x55e0 [ 66.028760][ T6833] ext4_getblk+0xad/0x520 [ 66.033086][ T6833] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.038807][ T6833] ? ext4_free_inode+0x1700/0x1700 [ 66.043900][ T6833] ext4_bread+0x7c/0x380 [ 66.048121][ T6833] ? ext4_getblk+0x520/0x520 [ 66.052711][ T6833] ? dquot_get_next_dqblk+0x180/0x180 [ 66.058308][ T6833] ext4_append+0x153/0x360 [ 66.062713][ T6833] ext4_mkdir+0x5e0/0xdf0 [ 66.067055][ T6833] ? ext4_rmdir+0xde0/0xde0 [ 66.071543][ T6833] ? security_inode_permission+0xc4/0xf0 [ 66.077162][ T6833] vfs_mkdir+0x419/0x690 [ 66.081386][ T6833] do_mkdirat+0x21e/0x280 [ 66.085715][ T6833] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.090555][ T6833] ? do_syscall_64+0x1c/0xe0 [ 66.095148][ T6833] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.101996][ T6833] do_syscall_64+0x60/0xe0 [ 66.106398][ T6833] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.112308][ T6833] RIP: 0033:0x45bed7 [ 66.116184][ T6833] Code: Bad RIP value. [ 66.120231][ T6833] RSP: 002b:00007ffd2a34a978 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 66.128620][ T6833] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 66.136581][ T6833] RDX: 00007ffd2a34a9c3 RSI: 00000000000001ff RDI: 00007ffd2a34a9c0 [ 66.144539][ T6833] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 66.152494][ T6833] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185c0 [ 66.160461][ T6833] R13: 00007ffd2a34a9b0 R14: 0000000000000000 R15: 00007ffd2a34a9c0 [ 66.220875][ T6833] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6833 [ 66.230441][ T6833] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.236585][ T6833] CPU: 1 PID: 6833 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.245187][ T6833] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.255239][ T6833] Call Trace: [ 66.258534][ T6833] dump_stack+0x18f/0x20d [ 66.262889][ T6833] check_preemption_disabled+0x20d/0x220 [ 66.268536][ T6833] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.273676][ T6833] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.279151][ T6833] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.285010][ T6833] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.290318][ T6833] ? ext4_ext_release+0x10/0x10 [ 66.295202][ T6833] ? down_write_killable+0x170/0x170 [ 66.300760][ T6833] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.306235][ T6833] ext4_map_blocks+0x4cb/0x1640 [ 66.311290][ T6833] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.316522][ T6833] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.322160][ T6833] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.328338][ T6833] ? prandom_u32_state+0xe/0x170 [ 66.333268][ T6833] ? __brelse+0x84/0xa0 [ 66.337418][ T6833] ? __ext4_new_inode+0x144/0x55e0 [ 66.342541][ T6833] ext4_getblk+0xad/0x520 [ 66.346857][ T6833] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.352577][ T6833] ? ext4_free_inode+0x1700/0x1700 [ 66.357677][ T6833] ext4_bread+0x7c/0x380 [ 66.361911][ T6833] ? ext4_getblk+0x520/0x520 [ 66.366499][ T6833] ? dquot_get_next_dqblk+0x180/0x180 [ 66.371851][ T6833] ext4_append+0x153/0x360 [ 66.376259][ T6833] ext4_mkdir+0x5e0/0xdf0 [ 66.380571][ T6833] ? ext4_rmdir+0xde0/0xde0 [ 66.385069][ T6833] ? security_inode_permission+0xc4/0xf0 [ 66.390702][ T6833] vfs_mkdir+0x419/0x690 [ 66.394938][ T6833] do_mkdirat+0x21e/0x280 [ 66.399256][ T6833] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.404092][ T6833] ? do_syscall_64+0x1c/0xe0 [ 66.408674][ T6833] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.414640][ T6833] do_syscall_64+0x60/0xe0 [ 66.419057][ T6833] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.424945][ T6833] RIP: 0033:0x45bed7 [ 66.428823][ T6833] Code: Bad RIP value. [ 66.432895][ T6833] RSP: 002b:00007ffd2a34a978 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 66.441401][ T6833] RAX: ffffffffffffffda RBX: 000000000001029a RCX: 000000000045bed7 [ 66.449359][ T6833] RDX: 00007ffd2a34a9c3 RSI: 00000000000001ff RDI: 00007ffd2a34a9c0 [ 66.457311][ T6833] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 2020/06/18 05:56:52 building call list... [ 66.465869][ T6833] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 66.473830][ T6833] R13: 00007ffd2a34a9b0 R14: 0000000000010287 R15: 00007ffd2a34a9c0 [ 66.761840][ T166] tipc: TX() has been purged, node left! [ 67.273963][ T166] ================================================================== [ 67.282238][ T166] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 67.290126][ T166] Write of size 1 at addr ffff8880978a91e4 by task kworker/u4:4/166 [ 67.298094][ T166] [ 67.300425][ T166] CPU: 0 PID: 166 Comm: kworker/u4:4 Not tainted 5.8.0-rc1-syzkaller #0 [ 67.308747][ T166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.318832][ T166] Workqueue: netns cleanup_net [ 67.323594][ T166] Call Trace: [ 67.326887][ T166] dump_stack+0x18f/0x20d [ 67.331242][ T166] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.336783][ T166] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.342323][ T166] ? afs_put_call+0xa40/0xa40 [ 67.347239][ T166] print_address_description.constprop.0.cold+0xd3/0x413 [ 67.354285][ T166] ? vprintk_func+0x97/0x1a6 [ 67.358883][ T166] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.364431][ T166] kasan_report.cold+0x1f/0x37 [ 67.369210][ T166] ? rcu_read_lock_held_common+0x51/0xa0 [ 67.374839][ T166] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.380386][ T166] afs_wake_up_async_call+0x6aa/0x770 [ 67.385760][ T166] ? afs_close_socket+0x320/0x320 [ 67.390783][ T166] ? afs_put_call+0xa40/0xa40 [ 67.395545][ T166] rxrpc_notify_socket+0x1db/0x5d0 [ 67.400661][ T166] ? afs_put_call+0xa40/0xa40 [ 67.405337][ T166] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 67.411752][ T166] rxrpc_call_completed+0xca/0xf0 [ 67.416797][ T166] rxrpc_discard_prealloc+0x781/0xab0 [ 67.422180][ T166] ? lock_sock_nested+0x94/0x110 [ 67.427128][ T166] rxrpc_listen+0x147/0x360 [ 67.431643][ T166] afs_close_socket+0x95/0x320 [ 67.436511][ T166] ? afs_purge_servers+0x16d/0x300 [ 67.441639][ T166] ? afs_rx_discard_new_call+0x50/0x50 [ 67.447103][ T166] ? init_wait_var_entry+0x200/0x200 [ 67.452397][ T166] ? rcu_read_lock_held_common+0xa0/0xa0 [ 67.458031][ T166] ? check_preemption_disabled+0x38/0x220 [ 67.463752][ T166] afs_net_exit+0x1bc/0x310 [ 67.468250][ T166] ? afs_net_init+0xe30/0xe30 [ 67.472923][ T166] ops_exit_list.isra.0+0xa8/0x150 [ 67.478309][ T166] cleanup_net+0x511/0xa50 [ 67.482727][ T166] ? unregister_pernet_device+0x70/0x70 [ 67.488276][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.494276][ T166] process_one_work+0x965/0x1690 [ 67.499234][ T166] ? lock_release+0x800/0x800 [ 67.504002][ T166] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.509380][ T166] ? rwlock_bug.part.0+0x90/0x90 [ 67.514328][ T166] worker_thread+0x96/0xe10 [ 67.518846][ T166] ? process_one_work+0x1690/0x1690 [ 67.524047][ T166] kthread+0x3b5/0x4a0 [ 67.528208][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.533921][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.539642][ T166] ret_from_fork+0x1f/0x30 [ 67.544069][ T166] [ 67.546390][ T166] Allocated by task 6833: [ 67.550715][ T166] save_stack+0x1b/0x40 [ 67.554868][ T166] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 67.560525][ T166] kmem_cache_alloc_trace+0x153/0x7d0 [ 67.565910][ T166] afs_alloc_call+0x55/0x630 [ 67.570503][ T166] afs_charge_preallocation+0xe9/0x2d0 [ 67.575959][ T166] afs_open_socket+0x292/0x360 [ 67.580716][ T166] afs_net_init+0xa6c/0xe30 [ 67.585219][ T166] ops_init+0xaf/0x420 [ 67.589389][ T166] setup_net+0x2de/0x860 [ 67.593648][ T166] copy_net_ns+0x293/0x590 [ 67.598093][ T166] create_new_namespaces+0x3fb/0xb30 [ 67.603395][ T166] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 67.609053][ T166] ksys_unshare+0x43d/0x8e0 [ 67.613573][ T166] __x64_sys_unshare+0x2d/0x40 [ 67.618347][ T166] do_syscall_64+0x60/0xe0 [ 67.622778][ T166] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.628659][ T166] [ 67.631074][ T166] Freed by task 166: [ 67.634966][ T166] save_stack+0x1b/0x40 [ 67.639106][ T166] __kasan_slab_free+0xf7/0x140 [ 67.645248][ T166] kfree+0x109/0x2b0 [ 67.649144][ T166] afs_put_call+0x585/0xa40 [ 67.653676][ T166] rxrpc_discard_prealloc+0x764/0xab0 [ 67.659052][ T166] rxrpc_listen+0x147/0x360 [ 67.663560][ T166] afs_close_socket+0x95/0x320 [ 67.668321][ T166] afs_net_exit+0x1bc/0x310 [ 67.672828][ T166] ops_exit_list.isra.0+0xa8/0x150 [ 67.677936][ T166] cleanup_net+0x511/0xa50 [ 67.682360][ T166] process_one_work+0x965/0x1690 [ 67.687322][ T166] worker_thread+0x96/0xe10 [ 67.691823][ T166] kthread+0x3b5/0x4a0 [ 67.695890][ T166] ret_from_fork+0x1f/0x30 [ 67.700310][ T166] [ 67.702641][ T166] The buggy address belongs to the object at ffff8880978a9000 [ 67.702641][ T166] which belongs to the cache kmalloc-1k of size 1024 [ 67.716698][ T166] The buggy address is located 484 bytes inside of [ 67.716698][ T166] 1024-byte region [ffff8880978a9000, ffff8880978a9400) [ 67.730131][ T166] The buggy address belongs to the page: [ 67.735768][ T166] page:ffffea00025e2a40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 67.744870][ T166] flags: 0xfffe0000000200(slab) [ 67.749755][ T166] raw: 00fffe0000000200 ffffea00025e29c8 ffffea000287ac08 ffff8880aa000c40 [ 67.758531][ T166] raw: 0000000000000000 ffff8880978a9000 0000000100000002 0000000000000000 [ 67.767105][ T166] page dumped because: kasan: bad access detected [ 67.773513][ T166] [ 67.775839][ T166] Memory state around the buggy address: [ 67.781643][ T166] ffff8880978a9080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.789708][ T166] ffff8880978a9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.797772][ T166] >ffff8880978a9180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.805823][ T166] ^ [ 67.813017][ T166] ffff8880978a9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.821076][ T166] ffff8880978a9280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.829159][ T166] ================================================================== [ 67.837309][ T166] Disabling lock debugging due to kernel taint [ 67.843551][ T166] Kernel panic - not syncing: panic_on_warn set ... [ 67.850133][ T166] CPU: 0 PID: 166 Comm: kworker/u4:4 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 67.859828][ T166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.869880][ T166] Workqueue: netns cleanup_net [ 67.874631][ T166] Call Trace: [ 67.877943][ T166] dump_stack+0x18f/0x20d [ 67.882267][ T166] ? afs_wake_up_async_call+0x680/0x770 [ 67.887888][ T166] ? afs_put_call+0xa40/0xa40 [ 67.892571][ T166] panic+0x2e3/0x75c [ 67.896642][ T166] ? __warn_printk+0xf3/0xf3 [ 67.901770][ T166] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 67.907919][ T166] ? trace_hardirqs_on+0x55/0x220 [ 67.912937][ T166] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.918480][ T166] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.924017][ T166] ? afs_put_call+0xa40/0xa40 [ 67.928688][ T166] end_report+0x4d/0x53 [ 67.932840][ T166] kasan_report.cold+0xd/0x37 [ 67.937712][ T166] ? rcu_read_lock_held_common+0x51/0xa0 [ 67.943361][ T166] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.949029][ T166] afs_wake_up_async_call+0x6aa/0x770 [ 67.954479][ T166] ? afs_close_socket+0x320/0x320 [ 67.959598][ T166] ? afs_put_call+0xa40/0xa40 [ 67.964355][ T166] rxrpc_notify_socket+0x1db/0x5d0 [ 67.969479][ T166] ? afs_put_call+0xa40/0xa40 [ 67.974237][ T166] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 67.980646][ T166] rxrpc_call_completed+0xca/0xf0 [ 67.985693][ T166] rxrpc_discard_prealloc+0x781/0xab0 [ 67.991070][ T166] ? lock_sock_nested+0x94/0x110 [ 67.996006][ T166] rxrpc_listen+0x147/0x360 [ 68.000690][ T166] afs_close_socket+0x95/0x320 [ 68.005977][ T166] ? afs_purge_servers+0x16d/0x300 [ 68.011177][ T166] ? afs_rx_discard_new_call+0x50/0x50 [ 68.016646][ T166] ? init_wait_var_entry+0x200/0x200 [ 68.021930][ T166] ? rcu_read_lock_held_common+0xa0/0xa0 [ 68.027561][ T166] ? check_preemption_disabled+0x38/0x220 [ 68.033293][ T166] afs_net_exit+0x1bc/0x310 [ 68.037784][ T166] ? afs_net_init+0xe30/0xe30 [ 68.042450][ T166] ops_exit_list.isra.0+0xa8/0x150 [ 68.047554][ T166] cleanup_net+0x511/0xa50 [ 68.051983][ T166] ? unregister_pernet_device+0x70/0x70 [ 68.058566][ T166] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.064543][ T166] process_one_work+0x965/0x1690 [ 68.069511][ T166] ? lock_release+0x800/0x800 [ 68.074443][ T166] ? pwq_dec_nr_in_flight+0x310/0x310 [ 68.079897][ T166] ? rwlock_bug.part.0+0x90/0x90 [ 68.085002][ T166] worker_thread+0x96/0xe10 [ 68.089522][ T166] ? process_one_work+0x1690/0x1690 [ 68.094711][ T166] kthread+0x3b5/0x4a0 [ 68.098771][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.104655][ T166] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.110542][ T166] ret_from_fork+0x1f/0x30 [ 68.116352][ T166] Kernel Offset: disabled [ 68.120685][ T166] Rebooting in 86400 seconds..