[  OK  ] Started Getty on tty6.
[  OK  ] Started Getty on tty5.
[  OK  ] Started Getty on tty4.
[  OK  ] Started Getty on tty3.
[  OK  ] Started Getty on tty2.
[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.


Debian GNU/Linux 9 syzkaller ttyS0

syzkaller login: [   59.249325][  T319] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:6/319
[   59.259365][  T319] caller is ext4_mb_new_blocks+0xa77/0x3b30
[   59.265302][  T319] CPU: 0 PID: 319 Comm: kworker/u4:6 Not tainted 5.7.0-syzkaller #0
[   59.273259][  T319] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   59.283312][  T319] Workqueue: writeback wb_workfn (flush-8:0)
[   59.289291][  T319] Call Trace:
[   59.292598][  T319]  dump_stack+0x188/0x20d
[   59.296916][  T319]  debug_smp_processor_id.cold+0x88/0x9b
[   59.302530][  T319]  ext4_mb_new_blocks+0xa77/0x3b30
[   59.307639][  T319]  ? __kmalloc+0x62f/0x7a0
[   59.312118][  T319]  ? ext4_ext_search_right+0x2ca/0xb20
[   59.317761][  T319]  ? ext4_inode_to_goal_block+0x2df/0x3f0
[   59.323478][  T319]  ext4_ext_map_blocks+0x2044/0x3410
[   59.328754][  T319]  ? ext4_ext_release+0x10/0x10
[   59.333627][  T319]  ? __down_timeout+0x2d0/0x2d0
[   59.338472][  T319]  ? ext4_es_lookup_extent+0x41d/0xd30
[   59.343913][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   59.349454][  T319]  ext4_map_blocks+0x4cb/0x1640
[   59.354291][  T319]  ? ext4_issue_zeroout+0x1e0/0x1e0
[   59.359470][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   59.364913][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   59.370464][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   59.376571][  T319]  ? ext4_alloc_io_end_vec+0x145/0x1c0
[   59.382030][  T319]  ext4_writepages+0x1ab7/0x3400
[   59.386978][  T319]  ? __ext4_mark_inode_dirty+0x950/0x950
[   59.392704][  T319]  ? __lock_acquire+0x2224/0x48a0
[   59.397739][  T319]  ? lockdep_hardirqs_on_prepare+0x590/0x590
[   59.403704][  T319]  ? lockdep_hardirqs_on_prepare+0x590/0x590
[   59.409669][  T319]  ? __ext4_mark_inode_dirty+0x950/0x950
[   59.415309][  T319]  ? do_writepages+0xfa/0x2a0
[   59.419981][  T319]  do_writepages+0xfa/0x2a0
[   59.424490][  T319]  ? page_writeback_cpu_online+0x10/0x10
[   59.430123][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   59.435599][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   59.441129][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   59.447093][  T319]  ? lock_downgrade+0x840/0x840
[   59.452032][  T319]  __writeback_single_inode+0x12a/0x1410
[   59.457684][  T319]  ? _raw_spin_unlock+0x24/0x40
[   59.462567][  T319]  ? wbc_attach_and_unlock_inode+0x60a/0x9c0
[   59.468598][  T319]  writeback_sb_inodes+0x515/0xdd0
[   59.473759][  T319]  ? __writeback_single_inode+0x1410/0x1410
[   59.479662][  T319]  __writeback_inodes_wb+0xc3/0x250
[   59.484863][  T319]  wb_writeback+0x910/0xd90
[   59.489517][  T319]  ? print_usage_bug+0x240/0x240
[   59.494470][  T319]  ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0
[   59.500813][  T319]  ? _find_next_bit.constprop.0+0x1a3/0x200
[   59.506716][  T319]  ? cpumask_next+0x3c/0x40
[   59.511254][  T319]  ? get_nr_dirty_inodes+0xd6/0x130
[   59.516466][  T319]  wb_workfn+0xadf/0x10d0
[   59.520800][  T319]  ? inode_wait_for_writeback+0x30/0x30
[   59.526490][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   59.531964][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   59.537536][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   59.543509][  T319]  process_one_work+0x965/0x16a0
[   59.548442][  T319]  ? lock_release+0x800/0x800
[   59.553328][  T319]  ? pwq_dec_nr_in_flight+0x310/0x310
[   59.558688][  T319]  ? rwlock_bug.part.0+0x90/0x90
[   59.563614][  T319]  worker_thread+0x96/0xe10
[   59.568120][  T319]  ? process_one_work+0x16a0/0x16a0
[   59.573309][  T319]  kthread+0x388/0x470
[   59.577379][  T319]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   59.583087][  T319]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   59.588794][  T319]  ret_from_fork+0x24/0x30
Warning: Permanently added '10.128.15.198' (ECDSA) to the list of known hosts.
2020/06/14 05:46:17 fuzzer started
2020/06/14 05:46:18 connecting to host at 10.128.0.26:44707
2020/06/14 05:46:18 checking machine...
2020/06/14 05:46:18 checking revisions...
2020/06/14 05:46:18 testing simple program...
[   64.311996][ T6823] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6823
[   64.321216][ T6823] caller is ext4_mb_new_blocks+0xa77/0x3b30
[   64.327105][ T6823] CPU: 1 PID: 6823 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0
[   64.334987][ T6823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   64.345140][ T6823] Call Trace:
[   64.348432][ T6823]  dump_stack+0x188/0x20d
[   64.352749][ T6823]  debug_smp_processor_id.cold+0x88/0x9b
[   64.358377][ T6823]  ext4_mb_new_blocks+0xa77/0x3b30
[   64.363500][ T6823]  ? ext4_ext_search_right+0x2ca/0xb20
[   64.368946][ T6823]  ? ext4_inode_to_goal_block+0x2df/0x3f0
[   64.374649][ T6823]  ext4_ext_map_blocks+0x2044/0x3410
[   64.379928][ T6823]  ? ext4_ext_release+0x10/0x10
[   64.384786][ T6823]  ? __down_timeout+0x2d0/0x2d0
[   64.389746][ T6823]  ? ext4_es_lookup_extent+0x41d/0xd30
[   64.395205][ T6823]  ext4_map_blocks+0x4cb/0x1640
[   64.400048][ T6823]  ? ext4_issue_zeroout+0x1e0/0x1e0
[   64.405575][ T6823]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   64.411681][ T6823]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   64.417647][ T6823]  ? prandom_u32_state+0xe/0x170
[   64.422595][ T6823]  ? __brelse+0x84/0xa0
[   64.426736][ T6823]  ? __ext4_new_inode+0x144/0x57c0
[   64.431841][ T6823]  ext4_getblk+0xad/0x520
[   64.436157][ T6823]  ? ext4_iomap_overwrite_begin+0xa0/0xa0
[   64.441886][ T6823]  ? ext4_free_inode+0x17e0/0x17e0
[   64.446991][ T6823]  ext4_bread+0x7c/0x380
[   64.451217][ T6823]  ? ext4_getblk+0x520/0x520
[   64.455786][ T6823]  ? dqget+0xff0/0xff0
[   64.459840][ T6823]  ext4_append+0x153/0x360
[   64.464239][ T6823]  ext4_mkdir+0x5e0/0xdf0
[   64.468576][ T6823]  ? ext4_rmdir+0xde0/0xde0
[   64.473069][ T6823]  ? security_inode_permission+0xc4/0xf0
[   64.478716][ T6823]  vfs_mkdir+0x419/0x690
[   64.482968][ T6823]  do_mkdirat+0x21e/0x280
[   64.487348][ T6823]  ? __ia32_sys_mknod+0xb0/0xb0
[   64.492324][ T6823]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   64.498316][ T6823]  ? do_syscall_64+0x21/0x7d0
[   64.503004][ T6823]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   64.509015][ T6823]  do_syscall_64+0xf6/0x7d0
[   64.513528][ T6823]  entry_SYSCALL_64_after_hwframe+0x49/0xb3
[   64.519430][ T6823] RIP: 0033:0x4b02a0
[   64.523307][ T6823] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
[   64.542898][ T6823] RSP: 002b:000000c00004f4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102
[   64.551727][ T6823] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0
[   64.559700][ T6823] RDX: 00000000000001c0 RSI: 000000c000027320 RDI: ffffffffffffff9c
[   64.567679][ T6823] RBP: 000000c00004f510 R08: 0000000000000000 R09: 0000000000000000
[   64.575648][ T6823] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff
[   64.583603][ T6823] R13: 000000000000009a R14: 0000000000000099 R15: 0000000000000100
[   64.608282][  T319] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:6/319
[   64.617871][  T319] caller is ext4_mb_new_blocks+0xa77/0x3b30
[   64.623765][  T319] CPU: 0 PID: 319 Comm: kworker/u4:6 Not tainted 5.7.0-syzkaller #0
[   64.631721][  T319] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   64.641788][  T319] Workqueue: writeback wb_workfn (flush-8:0)
[   64.647768][  T319] Call Trace:
[   64.651049][  T319]  dump_stack+0x188/0x20d
[   64.655622][  T319]  debug_smp_processor_id.cold+0x88/0x9b
[   64.661239][  T319]  ext4_mb_new_blocks+0xa77/0x3b30
[   64.666334][  T319]  ? __kmalloc+0x62f/0x7a0
[   64.670760][  T319]  ? ext4_ext_search_right+0x2ca/0xb20
[   64.676199][  T319]  ? ext4_inode_to_goal_block+0x2df/0x3f0
[   64.681927][  T319]  ext4_ext_map_blocks+0x2044/0x3410
[   64.687221][  T319]  ? ext4_ext_release+0x10/0x10
[   64.692265][  T319]  ? __down_timeout+0x2d0/0x2d0
[   64.697271][  T319]  ? ext4_es_lookup_extent+0x41d/0xd30
[   64.702725][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   64.708181][  T319]  ext4_map_blocks+0x4cb/0x1640
[   64.713042][  T319]  ? ext4_issue_zeroout+0x1e0/0x1e0
[   64.718218][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   64.723681][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   64.730860][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   64.736823][  T319]  ? ext4_alloc_io_end_vec+0x145/0x1c0
[   64.742267][  T319]  ext4_writepages+0x1ab7/0x3400
[   64.747223][  T319]  ? __ext4_mark_inode_dirty+0x950/0x950
[   64.753015][  T319]  ? __lock_acquire+0x2224/0x48a0
[   64.758063][  T319]  ? lockdep_hardirqs_on_prepare+0x590/0x590
[   64.764283][  T319]  ? lockdep_hardirqs_on_prepare+0x590/0x590
[   64.770262][  T319]  ? __ext4_mark_inode_dirty+0x950/0x950
[   64.775889][  T319]  ? do_writepages+0xfa/0x2a0
[   64.780555][  T319]  do_writepages+0xfa/0x2a0
[   64.785046][  T319]  ? page_writeback_cpu_online+0x10/0x10
[   64.790663][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   64.796107][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   64.801652][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   64.807630][  T319]  ? lock_downgrade+0x840/0x840
[   64.812475][  T319]  __writeback_single_inode+0x12a/0x1410
[   64.818093][  T319]  ? _raw_spin_unlock+0x24/0x40
[   64.822926][  T319]  ? wbc_attach_and_unlock_inode+0x60a/0x9c0
[   64.828914][  T319]  writeback_sb_inodes+0x515/0xdd0
[   64.834018][  T319]  ? __writeback_single_inode+0x1410/0x1410
[   64.839991][  T319]  __writeback_inodes_wb+0xc3/0x250
[   64.845196][  T319]  wb_writeback+0x910/0xd90
[   64.849713][  T319]  ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0
[   64.851013][ T6826] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6826
[   64.856096][  T319]  ? cpumask_next+0x3c/0x40
[   64.865519][ T6826] caller is ext4_mb_new_blocks+0xa77/0x3b30
[   64.869946][  T319]  ? get_nr_dirty_inodes+0xd6/0x130
[   64.869967][  T319]  wb_workfn+0x9d8/0x10d0
[   64.869989][  T319]  ? inode_wait_for_writeback+0x30/0x30
[   64.870007][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   64.870031][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   64.870050][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   64.908000][  T319]  process_one_work+0x965/0x16a0
[   64.912938][  T319]  ? lock_release+0x800/0x800
[   64.917602][  T319]  ? pwq_dec_nr_in_flight+0x310/0x310
[   64.922985][  T319]  ? rwlock_bug.part.0+0x90/0x90
[   64.927920][  T319]  worker_thread+0x96/0xe10
[   64.932420][  T319]  ? process_one_work+0x16a0/0x16a0
[   64.937626][  T319]  kthread+0x388/0x470
[   64.941685][  T319]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   64.947398][  T319]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   64.953116][  T319]  ret_from_fork+0x24/0x30
[   64.957539][ T6826] CPU: 1 PID: 6826 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0
[   64.965792][ T6826] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   64.968377][  T319] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:6/319
[   64.975861][ T6826] Call Trace:
[   64.985066][  T319] caller is ext4_mb_new_blocks+0xa77/0x3b30
[   64.988245][ T6826]  dump_stack+0x188/0x20d
[   64.988266][ T6826]  debug_smp_processor_id.cold+0x88/0x9b
[   64.988279][ T6826]  ext4_mb_new_blocks+0xa77/0x3b30
[   64.988307][ T6826]  ? ext4_ext_search_right+0x2ca/0xb20
[   65.014800][ T6826]  ? ext4_inode_to_goal_block+0x2df/0x3f0
[   65.022086][ T6826]  ext4_ext_map_blocks+0x2044/0x3410
[   65.027370][ T6826]  ? ext4_ext_release+0x10/0x10
[   65.032232][ T6826]  ? __down_timeout+0x2d0/0x2d0
[   65.037088][ T6826]  ? ext4_es_lookup_extent+0x41d/0xd30
[   65.042543][ T6826]  ext4_map_blocks+0x4cb/0x1640
[   65.047390][ T6826]  ? ext4_issue_zeroout+0x1e0/0x1e0
[   65.052577][ T6826]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   65.058127][ T6826]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   65.064108][ T6826]  ? prandom_u32_state+0xe/0x170
[   65.069065][ T6826]  ? __brelse+0x84/0xa0
[   65.073222][ T6826]  ? __ext4_new_inode+0x144/0x57c0
[   65.078323][ T6826]  ext4_getblk+0xad/0x520
[   65.082640][ T6826]  ? ext4_iomap_overwrite_begin+0xa0/0xa0
[   65.088350][ T6826]  ? ext4_free_inode+0x17e0/0x17e0
[   65.093449][ T6826]  ext4_bread+0x7c/0x380
[   65.097699][ T6826]  ? ext4_getblk+0x520/0x520
[   65.102276][ T6826]  ? dqget+0xff0/0xff0
[   65.106336][ T6826]  ext4_append+0x153/0x360
[   65.110743][ T6826]  ext4_mkdir+0x5e0/0xdf0
[   65.115077][ T6826]  ? ext4_rmdir+0xde0/0xde0
[   65.119570][ T6826]  ? security_inode_permission+0xc4/0xf0
[   65.125196][ T6826]  vfs_mkdir+0x419/0x690
[   65.129445][ T6826]  do_mkdirat+0x21e/0x280
[   65.133767][ T6826]  ? __ia32_sys_mknod+0xb0/0xb0
[   65.138605][ T6826]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   65.144572][ T6826]  ? do_syscall_64+0x21/0x7d0
[   65.149337][ T6826]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   65.155326][ T6826]  do_syscall_64+0xf6/0x7d0
[   65.159995][ T6826]  entry_SYSCALL_64_after_hwframe+0x49/0xb3
[   65.165889][ T6826] RIP: 0033:0x45bee7
[   65.169776][ T6826] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00
[   65.189364][ T6826] RSP: 002b:00007ffdfdfb7358 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
[   65.197879][ T6826] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7
[   65.205833][ T6826] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffdfdfb7530
[   65.213792][ T6826] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003a00
[   65.221784][ T6826] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2
[   65.230350][ T6826] R13: 00007ffdfdfb7530 R14: 8421084210842109 R15: 00007ffdfdfb753c
[   65.238328][  T319] CPU: 0 PID: 319 Comm: kworker/u4:6 Not tainted 5.7.0-syzkaller #0
[   65.246319][  T319] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   65.256418][  T319] Workqueue: writeback wb_workfn (flush-8:0)
[   65.262409][  T319] Call Trace:
[   65.265716][  T319]  dump_stack+0x188/0x20d
[   65.270063][  T319]  debug_smp_processor_id.cold+0x88/0x9b
[   65.275700][  T319]  ext4_mb_new_blocks+0xa77/0x3b30
[   65.280817][  T319]  ? __kmalloc+0x62f/0x7a0
[   65.285257][  T319]  ? ext4_ext_search_right+0x2ca/0xb20
[   65.290726][  T319]  ? ext4_inode_to_goal_block+0x2df/0x3f0
[   65.296462][  T319]  ext4_ext_map_blocks+0x2044/0x3410
[   65.301765][  T319]  ? ext4_ext_release+0x10/0x10
[   65.306643][  T319]  ? __down_timeout+0x2d0/0x2d0
[   65.311499][  T319]  ? ext4_es_lookup_extent+0x41d/0xd30
[   65.316972][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   65.322447][  T319]  ext4_map_blocks+0x4cb/0x1640
[   65.327401][  T319]  ? ext4_issue_zeroout+0x1e0/0x1e0
[   65.332608][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   65.338171][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   65.343831][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   65.349961][ T6827] IPVS: ftp: loaded support on port[0] = 21
[   65.350712][  T319]  ? ext4_alloc_io_end_vec+0x145/0x1c0
[   65.362044][  T319]  ext4_writepages+0x1ab7/0x3400
[   65.367003][  T319]  ? __ext4_mark_inode_dirty+0x950/0x950
[   65.372676][  T319]  ? __lock_acquire+0x2224/0x48a0
[   65.377732][  T319]  ? lockdep_hardirqs_on_prepare+0x590/0x590
[   65.383732][  T319]  ? lockdep_hardirqs_on_prepare+0x590/0x590
[   65.389730][  T319]  ? __ext4_mark_inode_dirty+0x950/0x950
[   65.395505][  T319]  ? do_writepages+0xfa/0x2a0
[   65.400197][  T319]  do_writepages+0xfa/0x2a0
[   65.404728][  T319]  ? page_writeback_cpu_online+0x10/0x10
[   65.406517][ T6827] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6827
[   65.410382][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   65.410406][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   65.410426][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   65.419820][ T6827] caller is ext4_mb_new_blocks+0xa77/0x3b30
[   65.425266][  T319]  ? lock_downgrade+0x840/0x840
[   65.447562][  T319]  __writeback_single_inode+0x12a/0x1410
[   65.453187][  T319]  ? _raw_spin_unlock+0x24/0x40
[   65.458027][  T319]  ? wbc_attach_and_unlock_inode+0x60a/0x9c0
[   65.463993][  T319]  writeback_sb_inodes+0x515/0xdd0
[   65.469099][  T319]  ? __writeback_single_inode+0x1410/0x1410
[   65.475001][  T319]  __writeback_inodes_wb+0xc3/0x250
[   65.480199][  T319]  wb_writeback+0x910/0xd90
[   65.484700][  T319]  ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0
[   65.491457][  T319]  ? cpumask_next+0x3c/0x40
[   65.496035][  T319]  ? get_nr_dirty_inodes+0xd6/0x130
[   65.501223][  T319]  wb_workfn+0x9d8/0x10d0
[   65.505542][  T319]  ? inode_wait_for_writeback+0x30/0x30
[   65.511068][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   65.516516][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   65.522047][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   65.528020][  T319]  process_one_work+0x965/0x16a0
[   65.532952][  T319]  ? lock_release+0x800/0x800
[   65.537614][  T319]  ? pwq_dec_nr_in_flight+0x310/0x310
[   65.542982][  T319]  ? rwlock_bug.part.0+0x90/0x90
[   65.547918][  T319]  worker_thread+0x96/0xe10
[   65.552419][  T319]  ? process_one_work+0x16a0/0x16a0
[   65.557602][  T319]  kthread+0x388/0x470
[   65.561652][  T319]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   65.567376][  T319]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   65.573107][  T319]  ret_from_fork+0x24/0x30
[   65.577525][ T6827] CPU: 1 PID: 6827 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0
[   65.585788][ T6827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   65.595944][ T6827] Call Trace:
[   65.599260][ T6827]  dump_stack+0x188/0x20d
[   65.603613][ T6827]  debug_smp_processor_id.cold+0x88/0x9b
[   65.609260][ T6827]  ext4_mb_new_blocks+0xa77/0x3b30
[   65.614433][ T6827]  ? ext4_ext_search_right+0x2ca/0xb20
[   65.619900][ T6827]  ? ext4_inode_to_goal_block+0x2df/0x3f0
[   65.625636][ T6827]  ext4_ext_map_blocks+0x2044/0x3410
[   65.630940][ T6827]  ? ext4_ext_release+0x10/0x10
[   65.635830][ T6827]  ? __down_timeout+0x2d0/0x2d0
[   65.639949][  T319] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:6/319
[   65.640712][ T6827]  ? ext4_es_lookup_extent+0x41d/0xd30
[   65.649897][  T319] caller is ext4_mb_new_blocks+0xa77/0x3b30
[   65.655260][ T6827]  ext4_map_blocks+0x4cb/0x1640
[   65.665972][ T6827]  ? ext4_issue_zeroout+0x1e0/0x1e0
[   65.671177][ T6827]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   65.676715][ T6827]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   65.682700][ T6827]  ? prandom_u32_state+0xe/0x170
[   65.687749][ T6827]  ? __brelse+0x84/0xa0
[   65.691891][ T6827]  ? __ext4_new_inode+0x144/0x57c0
[   65.696989][ T6827]  ext4_getblk+0xad/0x520
[   65.701394][ T6827]  ? ext4_iomap_overwrite_begin+0xa0/0xa0
[   65.707105][ T6827]  ? ext4_free_inode+0x17e0/0x17e0
[   65.712204][ T6827]  ext4_bread+0x7c/0x380
[   65.716465][ T6827]  ? ext4_getblk+0x520/0x520
[   65.721057][ T6827]  ? dqget+0xff0/0xff0
[   65.725155][ T6827]  ext4_append+0x153/0x360
[   65.729569][ T6827]  ext4_mkdir+0x5e0/0xdf0
[   65.733902][ T6827]  ? ext4_rmdir+0xde0/0xde0
[   65.738497][ T6827]  ? security_inode_permission+0xc4/0xf0
[   65.744122][ T6827]  vfs_mkdir+0x419/0x690
[   65.748375][ T6827]  do_mkdirat+0x21e/0x280
[   65.752694][ T6827]  ? __ia32_sys_mknod+0xb0/0xb0
[   65.757567][ T6827]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   65.763595][ T6827]  ? do_syscall_64+0x21/0x7d0
[   65.768267][ T6827]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   65.774238][ T6827]  do_syscall_64+0xf6/0x7d0
[   65.778735][ T6827]  entry_SYSCALL_64_after_hwframe+0x49/0xb3
[   65.784624][ T6827] RIP: 0033:0x45bee7
[   65.788510][ T6827] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00
[   65.808098][ T6827] RSP: 002b:00007ffdfdfb7248 EFLAGS: 00000206 ORIG_RAX: 0000000000000053
[   65.816494][ T6827] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7
[   65.824455][ T6827] RDX: 00007ffdfdfb7293 RSI: 00000000000001ff RDI: 00007ffdfdfb7290
[   65.832425][ T6827] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003
[   65.840477][ T6827] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185d0
[   65.848433][ T6827] R13: 00007ffdfdfb7280 R14: 0000000000000000 R15: 00007ffdfdfb7290
[   65.856411][  T319] CPU: 0 PID: 319 Comm: kworker/u4:6 Not tainted 5.7.0-syzkaller #0
[   65.864416][  T319] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   65.874529][  T319] Workqueue: writeback wb_workfn (flush-8:0)
[   65.880522][  T319] Call Trace:
[   65.883838][  T319]  dump_stack+0x188/0x20d
[   65.888188][  T319]  debug_smp_processor_id.cold+0x88/0x9b
[   65.893835][  T319]  ext4_mb_new_blocks+0xa77/0x3b30
[   65.898960][  T319]  ? __kmalloc+0x62f/0x7a0
[   65.903406][  T319]  ? ext4_ext_search_right+0x2ca/0xb20
[   65.908889][  T319]  ? ext4_inode_to_goal_block+0x2df/0x3f0
[   65.914721][  T319]  ext4_ext_map_blocks+0x2044/0x3410
[   65.920032][  T319]  ? ext4_ext_release+0x10/0x10
[   65.925014][  T319]  ? __down_timeout+0x2d0/0x2d0
[   65.929882][  T319]  ? ext4_es_lookup_extent+0x41d/0xd30
[   65.935353][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   65.940844][  T319]  ext4_map_blocks+0x4cb/0x1640
[   65.945733][  T319]  ? ext4_issue_zeroout+0x1e0/0x1e0
[   65.950957][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   65.956448][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   65.962020][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   65.968026][  T319]  ? ext4_alloc_io_end_vec+0x145/0x1c0
[   65.973512][  T319]  ext4_writepages+0x1ab7/0x3400
[   65.978500][  T319]  ? __ext4_mark_inode_dirty+0x950/0x950
[   65.984156][  T319]  ? __lock_acquire+0x2224/0x48a0
[   65.989217][  T319]  ? lockdep_hardirqs_on_prepare+0x590/0x590
[   65.995589][  T319]  ? lockdep_hardirqs_on_prepare+0x590/0x590
[   66.002119][  T319]  ? __ext4_mark_inode_dirty+0x950/0x950
[   66.007778][  T319]  ? do_writepages+0xfa/0x2a0
[   66.012563][  T319]  do_writepages+0xfa/0x2a0
[   66.013113][ T6827] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6827
[   66.017075][  T319]  ? page_writeback_cpu_online+0x10/0x10
[   66.026526][ T6827] caller is ext4_mb_new_blocks+0xa77/0x3b30
[   66.032174][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   66.032197][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   66.032211][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   66.032227][  T319]  ? lock_downgrade+0x840/0x840
[   66.032249][  T319]  __writeback_single_inode+0x12a/0x1410
[   66.032269][  T319]  ? _raw_spin_unlock+0x24/0x40
[   66.070389][  T319]  ? wbc_attach_and_unlock_inode+0x60a/0x9c0
[   66.076382][  T319]  writeback_sb_inodes+0x515/0xdd0
[   66.081507][  T319]  ? __writeback_single_inode+0x1410/0x1410
[   66.087421][  T319]  __writeback_inodes_wb+0xc3/0x250
[   66.092617][  T319]  wb_writeback+0x910/0xd90
[   66.097137][  T319]  ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0
[   66.103476][  T319]  ? cpumask_next+0x3c/0x40
[   66.107969][  T319]  ? get_nr_dirty_inodes+0xd6/0x130
[   66.113158][  T319]  wb_workfn+0x9d8/0x10d0
[   66.117500][  T319]  ? inode_wait_for_writeback+0x30/0x30
[   66.123047][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   66.128496][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   66.134028][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   66.139999][  T319]  process_one_work+0x965/0x16a0
[   66.144950][  T319]  ? lock_release+0x800/0x800
[   66.149626][  T319]  ? pwq_dec_nr_in_flight+0x310/0x310
[   66.154987][  T319]  ? rwlock_bug.part.0+0x90/0x90
[   66.159937][  T319]  worker_thread+0x96/0xe10
[   66.164515][  T319]  ? process_one_work+0x16a0/0x16a0
[   66.169714][  T319]  kthread+0x388/0x470
[   66.173770][  T319]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   66.179473][  T319]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   66.185193][  T319]  ret_from_fork+0x24/0x30
[   66.189613][ T6827] CPU: 1 PID: 6827 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0
[   66.197867][ T6827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   66.207960][ T6827] Call Trace:
[   66.211267][ T6827]  dump_stack+0x188/0x20d
[   66.214109][ T1156] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1156
[   66.215607][ T6827]  debug_smp_processor_id.cold+0x88/0x9b
[   66.215627][ T6827]  ext4_mb_new_blocks+0xa77/0x3b30
[   66.224835][ T1156] caller is ext4_mb_new_blocks+0xa77/0x3b30
[   66.230379][ T6827]  ? ext4_ext_search_right+0x2ca/0xb20
[   66.230393][ T6827]  ? ext4_inode_to_goal_block+0x2df/0x3f0
[   66.230411][ T6827]  ext4_ext_map_blocks+0x2044/0x3410
[   66.230433][ T6827]  ? ext4_ext_release+0x10/0x10
[   66.230467][ T6827]  ? __down_timeout+0x2d0/0x2d0
[   66.230483][ T6827]  ? ext4_es_lookup_extent+0x41d/0xd30
[   66.273017][ T6827]  ext4_map_blocks+0x4cb/0x1640
[   66.277872][ T6827]  ? ext4_issue_zeroout+0x1e0/0x1e0
[   66.283068][ T6827]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   66.288611][ T6827]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   66.294578][ T6827]  ? prandom_u32_state+0xe/0x170
[   66.299503][ T6827]  ? __brelse+0x84/0xa0
[   66.303658][ T6827]  ? __ext4_new_inode+0x144/0x57c0
[   66.308757][ T6827]  ext4_getblk+0xad/0x520
[   66.313075][ T6827]  ? ext4_iomap_overwrite_begin+0xa0/0xa0
[   66.318783][ T6827]  ? ext4_free_inode+0x17e0/0x17e0
[   66.323896][ T6827]  ext4_bread+0x7c/0x380
[   66.328123][ T6827]  ? ext4_getblk+0x520/0x520
[   66.332715][ T6827]  ? dqget+0xff0/0xff0
[   66.336795][ T6827]  ext4_append+0x153/0x360
[   66.341199][ T6827]  ext4_mkdir+0x5e0/0xdf0
[   66.345521][ T6827]  ? ext4_rmdir+0xde0/0xde0
[   66.350048][ T6827]  ? security_inode_permission+0xc4/0xf0
[   66.355676][ T6827]  vfs_mkdir+0x419/0x690
[   66.360192][ T6827]  do_mkdirat+0x21e/0x280
[   66.364508][ T6827]  ? __ia32_sys_mknod+0xb0/0xb0
[   66.369346][ T6827]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   66.375314][ T6827]  ? do_syscall_64+0x21/0x7d0
[   66.379991][ T6827]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   66.385976][ T6827]  do_syscall_64+0xf6/0x7d0
[   66.390470][ T6827]  entry_SYSCALL_64_after_hwframe+0x49/0xb3
[   66.396346][ T6827] RIP: 0033:0x45bee7
[   66.400253][ T6827] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00
[   66.419860][ T6827] RSP: 002b:00007ffdfdfb7248 EFLAGS: 00000206 ORIG_RAX: 0000000000000053
[   66.428259][ T6827] RAX: ffffffffffffffda RBX: 00000000000101d6 RCX: 000000000045bee7
[   66.436216][ T6827] RDX: 00007ffdfdfb7293 RSI: 00000000000001ff RDI: 00007ffdfdfb7290
[   66.444187][ T6827] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003
[   66.452246][ T6827] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003
[   66.460227][ T6827] R13: 00007ffdfdfb7280 R14: 000000000001015b R15: 00007ffdfdfb7290
[   66.468223][ T1156] CPU: 0 PID: 1156 Comm: khugepaged Not tainted 5.7.0-syzkaller #0
[   66.476129][ T1156] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   66.486313][ T1156] Call Trace:
[   66.489619][ T1156]  dump_stack+0x188/0x20d
[   66.493964][ T1156]  debug_smp_processor_id.cold+0x88/0x9b
[   66.499613][ T1156]  ext4_mb_new_blocks+0xa77/0x3b30
[   66.504740][ T1156]  ? __kmalloc+0x62f/0x7a0
[   66.509185][ T1156]  ? ext4_ext_search_right+0x2ca/0xb20
[   66.514663][ T1156]  ? ext4_inode_to_goal_block+0x2df/0x3f0
2020/06/14 05:46:20 building call list...
[   66.520400][ T1156]  ext4_ext_map_blocks+0x2044/0x3410
[   66.525694][ T1156]  ? ext4_ext_release+0x10/0x10
[   66.530735][ T1156]  ? __down_timeout+0x2d0/0x2d0
[   66.535589][ T1156]  ? ext4_es_lookup_extent+0x41d/0xd30
[   66.541059][ T1156]  ext4_map_blocks+0x4cb/0x1640
[   66.546023][ T1156]  ? ext4_issue_zeroout+0x1e0/0x1e0
[   66.551238][ T1156]  ? debug_smp_processor_id+0x2f/0x185
[   66.556710][ T1156]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   66.562364][ T1156]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   66.568352][ T1156]  ? ext4_alloc_io_end_vec+0x145/0x1c0
[   66.574018][ T1156]  ext4_writepages+0x1ab7/0x3400
[   66.578988][ T1156]  ? mark_lock+0x30/0xdd0
[   66.583333][ T1156]  ? __ext4_mark_inode_dirty+0x950/0x950
[   66.589011][ T1156]  ? __ext4_mark_inode_dirty+0x950/0x950
[   66.594677][ T1156]  ? do_writepages+0xfa/0x2a0
[   66.599478][ T1156]  do_writepages+0xfa/0x2a0
[   66.604005][ T1156]  ? page_writeback_cpu_online+0x10/0x10
[   66.609656][ T1156]  ? do_raw_spin_lock+0x129/0x2e0
[   66.614799][ T1156]  ? do_raw_spin_unlock+0x171/0x260
[   66.620086][ T1156]  ? _raw_spin_unlock+0x24/0x40
[   66.624944][ T1156]  __filemap_fdatawrite_range+0x2aa/0x390
[   66.631035][ T1156]  ? collapse_file+0x3575/0x4300
[   66.635970][ T1156]  ? delete_from_page_cache_batch+0xec0/0xec0
[   66.642050][ T1156]  ? _raw_spin_unlock_irq+0x1f/0x80
[   66.647272][ T1156]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   66.653481][ T1156]  collapse_file+0x357f/0x4300
[   66.658801][ T1156]  ? collapse_huge_page+0x4370/0x4370
[   66.664174][ T1156]  ? khugepaged+0x24fa/0x3f80
[   66.669016][ T1156]  khugepaged+0x3049/0x3f80
[   66.673621][ T1156]  ? collapse_pte_mapped_thp+0xbf0/0xbf0
[   66.679256][ T1156]  ? lock_downgrade+0x840/0x840
[   66.684107][ T1156]  ? finish_wait+0x260/0x260
[   66.688894][ T1156]  ? _raw_spin_unlock_irqrestore+0x62/0xe0
[   66.694708][ T1156]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   66.700781][ T1156]  ? __kthread_parkme+0x13f/0x1e0
[   66.707129][ T1156]  ? collapse_pte_mapped_thp+0xbf0/0xbf0
[   66.712937][ T1156]  kthread+0x388/0x470
[   66.721088][ T1156]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   66.726804][ T1156]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   66.732522][ T1156]  ret_from_fork+0x24/0x30
[   66.758234][  T319] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:6/319
[   66.767566][  T319] caller is ext4_mb_new_blocks+0xa77/0x3b30
[   66.773489][  T319] CPU: 1 PID: 319 Comm: kworker/u4:6 Not tainted 5.7.0-syzkaller #0
[   66.781490][  T319] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   66.791577][  T319] Workqueue: writeback wb_workfn (flush-8:0)
[   66.797668][  T319] Call Trace:
[   66.800982][  T319]  dump_stack+0x188/0x20d
[   66.802648][ T1156] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1156
[   66.805315][  T319]  debug_smp_processor_id.cold+0x88/0x9b
[   66.814418][ T1156] caller is ext4_mb_new_blocks+0xa77/0x3b30
[   66.819931][  T319]  ext4_mb_new_blocks+0xa77/0x3b30
[   66.819945][  T319]  ? __kmalloc+0x62f/0x7a0
[   66.819969][  T319]  ? ext4_ext_search_right+0x2ca/0xb20
[   66.819982][  T319]  ? ext4_inode_to_goal_block+0x2df/0x3f0
[   66.820003][  T319]  ext4_ext_map_blocks+0x2044/0x3410
[   66.820025][  T319]  ? ext4_ext_release+0x10/0x10
[   66.820057][  T319]  ? __down_timeout+0x2d0/0x2d0
[   66.862247][  T319]  ? ext4_es_lookup_extent+0x41d/0xd30
[   66.867696][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   66.873233][  T319]  ext4_map_blocks+0x4cb/0x1640
[   66.878074][  T319]  ? ext4_issue_zeroout+0x1e0/0x1e0
[   66.883949][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   66.889401][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   66.895465][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   66.901431][  T319]  ? ext4_alloc_io_end_vec+0x145/0x1c0
[   66.906876][  T319]  ext4_writepages+0x1ab7/0x3400
[   66.912004][  T319]  ? lockdep_hardirqs_on_prepare+0x580/0x590
[   66.917980][  T319]  ? __ext4_mark_inode_dirty+0x950/0x950
[   66.923608][  T319]  ? mark_held_locks+0x9f/0xe0
[   66.928390][  T319]  ? _raw_spin_unlock_irq+0x55/0x80
[   66.934096][  T319]  ? finish_task_switch+0x147/0x750
[   66.939300][  T319]  ? finish_task_switch+0x119/0x750
[   66.944519][  T319]  ? __ext4_mark_inode_dirty+0x950/0x950
[   66.950417][  T319]  ? do_writepages+0xfa/0x2a0
[   66.955357][  T319]  do_writepages+0xfa/0x2a0
[   66.959995][  T319]  ? page_writeback_cpu_online+0x10/0x10
[   66.965634][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   66.971185][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   66.976908][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   66.982974][  T319]  __writeback_single_inode+0x12a/0x1410
[   66.988616][  T319]  ? _raw_spin_unlock+0x36/0x40
[   66.993542][  T319]  ? wbc_attach_and_unlock_inode+0x60a/0x9c0
[   66.999520][  T319]  writeback_sb_inodes+0x515/0xdd0
[   67.004632][  T319]  ? __writeback_single_inode+0x1410/0x1410
[   67.010662][  T319]  __writeback_inodes_wb+0xc3/0x250
[   67.017515][  T319]  wb_writeback+0x910/0xd90
[   67.022034][  T319]  ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0
[   67.028370][  T319]  ? cpumask_next+0x3c/0x40
[   67.032860][  T319]  ? get_nr_dirty_inodes+0xd6/0x130
[   67.038061][  T319]  wb_workfn+0x9d8/0x10d0
[   67.042495][  T319]  ? inode_wait_for_writeback+0x30/0x30
[   67.048045][  T319]  ? debug_smp_processor_id+0x2f/0x185
[   67.053604][  T319]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   67.059314][  T319]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   67.065287][  T319]  process_one_work+0x965/0x16a0
executing program
[   67.070229][  T319]  ? lock_release+0x800/0x800
[   67.075015][  T319]  ? pwq_dec_nr_in_flight+0x310/0x310
[   67.080381][  T319]  ? rwlock_bug.part.0+0x90/0x90
[   67.085315][  T319]  worker_thread+0x96/0xe10
[   67.089810][  T319]  ? process_one_work+0x16a0/0x16a0
[   67.095003][  T319]  kthread+0x388/0x470
[   67.099156][  T319]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   67.104870][  T319]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   67.110576][  T319]  ret_from_fork+0x24/0x30
[   67.115076][ T1156] CPU: 0 PID: 1156 Comm: khugepaged Not tainted 5.7.0-syzkaller #0
[   67.123102][ T1156] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   67.133162][ T1156] Call Trace:
[   67.136479][ T1156]  dump_stack+0x188/0x20d
[   67.140829][ T1156]  debug_smp_processor_id.cold+0x88/0x9b
[   67.146587][ T1156]  ext4_mb_new_blocks+0xa77/0x3b30
[   67.151932][ T1156]  ? ext4_ext_search_right+0x2ca/0xb20
[   67.157516][ T1156]  ? ext4_ext_next_allocated_block+0x221/0x2d0
[   67.163783][ T1156]  ext4_ext_map_blocks+0x2044/0x3410
[   67.169078][ T1156]  ? ext4_ext_release+0x10/0x10
[   67.174034][ T1156]  ? __down_timeout+0x2d0/0x2d0
[   67.178972][ T1156]  ? ext4_es_lookup_extent+0x41d/0xd30
[   67.184856][ T1156]  ext4_map_blocks+0x4cb/0x1640
[   67.189725][ T1156]  ? ext4_issue_zeroout+0x1e0/0x1e0
[   67.194932][ T1156]  ? debug_smp_processor_id+0x2f/0x185
[   67.200428][ T1156]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   67.206239][ T1156]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   67.212220][ T1156]  ? ext4_alloc_io_end_vec+0x145/0x1c0
[   67.217721][ T1156]  ext4_writepages+0x1ab7/0x3400
[   67.222668][ T1156]  ? mark_lock+0x30/0xdd0
[   67.227012][ T1156]  ? __ext4_mark_inode_dirty+0x950/0x950
[   67.232672][ T1156]  ? __ext4_mark_inode_dirty+0x950/0x950
[   67.238326][ T1156]  ? do_writepages+0xfa/0x2a0
[   67.243001][ T1156]  do_writepages+0xfa/0x2a0
[   67.247535][ T1156]  ? page_writeback_cpu_online+0x10/0x10
[   67.253174][ T1156]  ? do_raw_spin_lock+0x129/0x2e0
[   67.258198][ T1156]  ? do_raw_spin_unlock+0x171/0x260
[   67.263397][ T1156]  ? _raw_spin_unlock+0x24/0x40
[   67.268260][ T1156]  __filemap_fdatawrite_range+0x2aa/0x390
[   67.273984][ T1156]  ? collapse_file+0x3575/0x4300
[   67.279020][ T1156]  ? delete_from_page_cache_batch+0xec0/0xec0
[   67.285106][ T1156]  ? _raw_spin_unlock_irq+0x1f/0x80
[   67.290307][ T1156]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   67.296294][ T1156]  collapse_file+0x357f/0x4300
[   67.301093][ T1156]  ? collapse_huge_page+0x4370/0x4370
[   67.306472][ T1156]  ? khugepaged+0x24fa/0x3f80
[   67.311211][ T1156]  khugepaged+0x3049/0x3f80
[   67.315738][ T1156]  ? collapse_pte_mapped_thp+0xbf0/0xbf0
[   67.321370][ T1156]  ? lock_downgrade+0x840/0x840
[   67.326220][ T1156]  ? finish_wait+0x260/0x260
[   67.330816][ T1156]  ? _raw_spin_unlock_irqrestore+0x62/0xe0
[   67.336627][ T1156]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   67.342622][ T1156]  ? __kthread_parkme+0x13f/0x1e0
[   67.347655][ T1156]  ? collapse_pte_mapped_thp+0xbf0/0xbf0
[   67.353290][ T1156]  kthread+0x388/0x470
[   67.357374][ T1156]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   67.363096][ T1156]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   67.368913][ T1156]  ret_from_fork+0x24/0x30
[   67.628427][  T263] tipc: TX() has been purged, node left!
[   68.836677][ T6823] can: request_module (can-proto-0) failed.
[   69.563202][ T6823] can: request_module (can-proto-0) failed.
[   69.575468][ T6823] can: request_module (can-proto-0) failed.