Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 57.027668][ T227] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:5/227 [ 57.036804][ T227] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.042790][ T227] CPU: 1 PID: 227 Comm: kworker/u4:5 Not tainted 5.7.0-next-20200609-syzkaller #0 [ 57.051996][ T227] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.062223][ T227] Workqueue: writeback wb_workfn (flush-8:0) [ 57.068180][ T227] Call Trace: [ 57.071467][ T227] dump_stack+0x18f/0x20d [ 57.075786][ T227] check_preemption_disabled+0x20d/0x220 [ 57.081396][ T227] ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.086551][ T227] ? ext4_find_extent+0x81a/0xad0 [ 57.091577][ T227] ? ext4_ext_search_right+0x2ca/0xb20 [ 57.097221][ T227] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 57.103014][ T227] ext4_ext_map_blocks+0x201b/0x33e0 [ 57.108285][ T227] ? ext4_ext_release+0x10/0x10 [ 57.113139][ T227] ? down_write_killable+0x170/0x170 [ 57.118423][ T227] ? ext4_es_lookup_extent+0x41d/0xd10 [ 57.123861][ T227] ext4_map_blocks+0x4cb/0x1640 [ 57.128694][ T227] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 57.133880][ T227] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.140281][ T227] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.146370][ T227] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 57.151817][ T227] ext4_writepages+0x1a83/0x33c0 [ 57.156748][ T227] ? __ext4_mark_inode_dirty+0x940/0x940 [ 57.162383][ T227] ? __lock_acquire+0x2224/0x48b0 [ 57.167404][ T227] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.173379][ T227] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.179356][ T227] ? __ext4_mark_inode_dirty+0x940/0x940 [ 57.184967][ T227] ? do_writepages+0xf3/0x2a0 [ 57.189619][ T227] do_writepages+0xf3/0x2a0 [ 57.194105][ T227] ? page_writeback_cpu_online+0x10/0x10 [ 57.199740][ T227] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.205438][ T227] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.211403][ T227] ? lock_downgrade+0x840/0x840 [ 57.216242][ T227] __writeback_single_inode+0x12a/0x13d0 [ 57.222028][ T227] ? _raw_spin_unlock+0x24/0x40 [ 57.226864][ T227] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 57.232828][ T227] writeback_sb_inodes+0x515/0xdc0 [ 57.237927][ T227] ? __writeback_single_inode+0x13d0/0x13d0 [ 57.244071][ T227] __writeback_inodes_wb+0xc3/0x250 [ 57.250056][ T227] wb_writeback+0x8c8/0xd40 [ 57.254561][ T227] ? writeback_inodes_wb.constprop.0+0x190/0x190 [ 57.260987][ T227] ? cpumask_next+0x3c/0x40 [ 57.266034][ T227] ? get_nr_dirty_inodes+0xd6/0x130 [ 57.271344][ T227] wb_workfn+0xab3/0x1090 [ 57.275665][ T227] ? inode_wait_for_writeback+0x30/0x30 [ 57.281226][ T227] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.286750][ T227] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.292748][ T227] process_one_work+0x965/0x1690 [ 57.297804][ T227] ? lock_release+0x800/0x800 [ 57.302468][ T227] ? pwq_dec_nr_in_flight+0x310/0x310 [ 57.308343][ T227] ? rwlock_bug.part.0+0x90/0x90 [ 57.313265][ T227] worker_thread+0x96/0xe10 [ 57.317785][ T227] ? process_one_work+0x1690/0x1690 [ 57.322962][ T227] kthread+0x3b5/0x4a0 [ 57.327121][ T227] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.332818][ T227] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.338535][ T227] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.0.54' (ECDSA) to the list of known hosts. 2020/06/09 13:14:27 fuzzer started 2020/06/09 13:14:27 connecting to host at 10.128.0.26:36231 2020/06/09 13:14:27 checking machine... 2020/06/09 13:14:27 checking revisions... 2020/06/09 13:14:27 testing simple program... [ 60.516438][ T6799] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6799 [ 60.525602][ T6799] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.532175][ T6799] CPU: 0 PID: 6799 Comm: syz-fuzzer Not tainted 5.7.0-next-20200609-syzkaller #0 [ 60.541433][ T6799] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.551474][ T6799] Call Trace: [ 60.554753][ T6799] dump_stack+0x18f/0x20d [ 60.559092][ T6799] check_preemption_disabled+0x20d/0x220 [ 60.564713][ T6799] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.569963][ T6799] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.575438][ T6799] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.581168][ T6799] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.586455][ T6799] ? ext4_ext_release+0x10/0x10 [ 60.591308][ T6799] ? down_write_killable+0x170/0x170 [ 60.596950][ T6799] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.602821][ T6799] ext4_map_blocks+0x4cb/0x1640 [ 60.607689][ T6799] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.612916][ T6799] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.618638][ T6799] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.624797][ T6799] ? prandom_u32_state+0xe/0x170 [ 60.629747][ T6799] ? __brelse+0x84/0xa0 [ 60.633904][ T6799] ? __ext4_new_inode+0x144/0x55e0 [ 60.639281][ T6799] ext4_getblk+0xad/0x520 [ 60.643601][ T6799] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.649299][ T6799] ? ext4_free_inode+0x1700/0x1700 [ 60.654401][ T6799] ext4_bread+0x7c/0x380 [ 60.658991][ T6799] ? ext4_getblk+0x520/0x520 [ 60.663579][ T6799] ? dquot_get_next_dqblk+0x180/0x180 [ 60.668938][ T6799] ext4_append+0x153/0x360 [ 60.673352][ T6799] ext4_mkdir+0x5e0/0xdf0 [ 60.677677][ T6799] ? ext4_rmdir+0xde0/0xde0 [ 60.682176][ T6799] ? security_inode_permission+0xc4/0xf0 [ 60.687798][ T6799] vfs_mkdir+0x419/0x690 [ 60.692022][ T6799] do_mkdirat+0x21e/0x280 [ 60.696332][ T6799] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.701162][ T6799] ? do_syscall_64+0x1c/0xe0 [ 60.705730][ T6799] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.711718][ T6799] do_syscall_64+0x60/0xe0 [ 60.716126][ T6799] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.721992][ T6799] RIP: 0033:0x4b02a0 [ 60.725858][ T6799] Code: Bad RIP value. [ 60.729901][ T6799] RSP: 002b:000000c0000dd4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 60.738298][ T6799] RAX: ffffffffffffffda RBX: 000000c00002e500 RCX: 00000000004b02a0 [ 60.746305][ T6799] RDX: 00000000000001c0 RSI: 000000c000026680 RDI: ffffffffffffff9c [ 60.754268][ T6799] RBP: 000000c0000dd510 R08: 0000000000000000 R09: 0000000000000000 [ 60.762245][ T6799] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 60.770202][ T6799] R13: 0000000000000035 R14: 0000000000000034 R15: 0000000000000100 [ 60.785960][ T6801] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6801 [ 60.795370][ T6801] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.801351][ T6801] CPU: 0 PID: 6801 Comm: syz-executor.0 Not tainted 5.7.0-next-20200609-syzkaller #0 [ 60.810798][ T6801] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.820842][ T6801] Call Trace: [ 60.824117][ T6801] dump_stack+0x18f/0x20d [ 60.828445][ T6801] check_preemption_disabled+0x20d/0x220 [ 60.834070][ T6801] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.839174][ T6801] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.844608][ T6801] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.850311][ T6801] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.855613][ T6801] ? ext4_ext_release+0x10/0x10 [ 60.860514][ T6801] ? down_write_killable+0x170/0x170 [ 60.866752][ T6801] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.872202][ T6801] ext4_map_blocks+0x4cb/0x1640 [ 60.877039][ T6801] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.882227][ T6801] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.887776][ T6801] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.893833][ T6801] ? prandom_u32_state+0xe/0x170 [ 60.898760][ T6801] ? __brelse+0x84/0xa0 [ 60.902902][ T6801] ? __ext4_new_inode+0x144/0x55e0 [ 60.907993][ T6801] ext4_getblk+0xad/0x520 [ 60.912300][ T6801] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.918000][ T6801] ? ext4_free_inode+0x1700/0x1700 [ 60.923086][ T6801] ext4_bread+0x7c/0x380 [ 60.927304][ T6801] ? ext4_getblk+0x520/0x520 [ 60.931870][ T6801] ? dquot_get_next_dqblk+0x180/0x180 [ 60.937239][ T6801] ext4_append+0x153/0x360 [ 60.941636][ T6801] ext4_mkdir+0x5e0/0xdf0 [ 60.945947][ T6801] ? ext4_rmdir+0xde0/0xde0 [ 60.950445][ T6801] ? security_inode_permission+0xc4/0xf0 [ 60.956057][ T6801] vfs_mkdir+0x419/0x690 [ 60.960288][ T6801] do_mkdirat+0x21e/0x280 [ 60.964607][ T6801] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.969447][ T6801] ? do_syscall_64+0x1c/0xe0 [ 60.974015][ T6801] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.979986][ T6801] do_syscall_64+0x60/0xe0 [ 60.984377][ T6801] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.990268][ T6801] RIP: 0033:0x45bee7 [ 60.994142][ T6801] Code: Bad RIP value. [ 60.998181][ T6801] RSP: 002b:00007ffd3ee5b758 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 61.006567][ T6801] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 61.014512][ T6801] RDX: 0000000000000002 RSI: 00000000000001c0 RDI: 00007ffd3ee5b930 [ 61.022469][ T6801] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000002d80 [ 61.030436][ T6801] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 61.038394][ T6801] R13: 00007ffd3ee5b930 R14: 8421084210842109 R15: 00007ffd3ee5b93c [ 61.121125][ T6802] IPVS: ftp: loaded support on port[0] = 21 [ 61.156470][ T6802] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6802 [ 61.166164][ T6802] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.172831][ T6802] CPU: 1 PID: 6802 Comm: syz-executor.0 Not tainted 5.7.0-next-20200609-syzkaller #0 [ 61.182255][ T6802] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.192290][ T6802] Call Trace: [ 61.195582][ T6802] dump_stack+0x18f/0x20d [ 61.199977][ T6802] check_preemption_disabled+0x20d/0x220 [ 61.205589][ T6802] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.210713][ T6802] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.216145][ T6802] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 61.221846][ T6802] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.227124][ T6802] ? ext4_ext_release+0x10/0x10 [ 61.231958][ T6802] ? down_write_killable+0x170/0x170 [ 61.237229][ T6802] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.242668][ T6802] ext4_map_blocks+0x4cb/0x1640 [ 61.247521][ T6802] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.252692][ T6802] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.258213][ T6802] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.264174][ T6802] ? prandom_u32_state+0xe/0x170 [ 61.269266][ T6802] ? __brelse+0x84/0xa0 [ 61.273420][ T6802] ? __ext4_new_inode+0x144/0x55e0 [ 61.278943][ T6802] ext4_getblk+0xad/0x520 [ 61.283276][ T6802] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 61.288995][ T6802] ? ext4_free_inode+0x1700/0x1700 [ 61.294428][ T6802] ext4_bread+0x7c/0x380 [ 61.298645][ T6802] ? ext4_getblk+0x520/0x520 [ 61.303223][ T6802] ? dquot_get_next_dqblk+0x180/0x180 [ 61.308589][ T6802] ext4_append+0x153/0x360 [ 61.312999][ T6802] ext4_mkdir+0x5e0/0xdf0 [ 61.317325][ T6802] ? ext4_rmdir+0xde0/0xde0 [ 61.321818][ T6802] ? security_inode_permission+0xc4/0xf0 [ 61.327436][ T6802] vfs_mkdir+0x419/0x690 [ 61.331653][ T6802] do_mkdirat+0x21e/0x280 [ 61.335958][ T6802] ? __ia32_sys_mknod+0xb0/0xb0 [ 61.340797][ T6802] ? do_syscall_64+0x1c/0xe0 [ 61.345382][ T6802] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.351359][ T6802] do_syscall_64+0x60/0xe0 [ 61.355753][ T6802] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.361625][ T6802] RIP: 0033:0x45bee7 [ 61.365503][ T6802] Code: Bad RIP value. [ 61.369542][ T6802] RSP: 002b:00007ffd3ee5b648 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 61.377944][ T6802] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 61.386065][ T6802] RDX: 00007ffd3ee5b693 RSI: 00000000000001ff RDI: 00007ffd3ee5b690 [ 61.394099][ T6802] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 61.402069][ T6802] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185d0 [ 61.410037][ T6802] R13: 00007ffd3ee5b680 R14: 0000000000000000 R15: 00007ffd3ee5b690 [ 61.482690][ T6802] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6802 [ 61.492224][ T6802] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.498642][ T6802] CPU: 0 PID: 6802 Comm: syz-executor.0 Not tainted 5.7.0-next-20200609-syzkaller #0 [ 61.509136][ T6802] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.519181][ T6802] Call Trace: [ 61.522467][ T6802] dump_stack+0x18f/0x20d [ 61.526809][ T6802] check_preemption_disabled+0x20d/0x220 [ 61.532437][ T6802] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.537560][ T6802] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.543017][ T6802] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 61.548746][ T6802] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.554030][ T6802] ? ext4_ext_release+0x10/0x10 [ 61.558878][ T6802] ? down_write_killable+0x170/0x170 [ 61.564162][ T6802] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.569628][ T6802] ext4_map_blocks+0x4cb/0x1640 [ 61.574539][ T6802] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.579777][ T6802] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.585321][ T6802] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.591429][ T6802] ? prandom_u32_state+0xe/0x170 [ 61.596376][ T6802] ? __brelse+0x84/0xa0 [ 61.600693][ T6802] ? __ext4_new_inode+0x144/0x55e0 [ 61.605981][ T6802] ext4_getblk+0xad/0x520 [ 61.610298][ T6802] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 61.616018][ T6802] ? ext4_free_inode+0x1700/0x1700 [ 61.621119][ T6802] ext4_bread+0x7c/0x380 [ 61.625353][ T6802] ? ext4_getblk+0x520/0x520 [ 61.629949][ T6802] ? dquot_get_next_dqblk+0x180/0x180 [ 61.635343][ T6802] ext4_append+0x153/0x360 [ 61.639755][ T6802] ext4_mkdir+0x5e0/0xdf0 [ 61.644066][ T6802] ? ext4_rmdir+0xde0/0xde0 [ 61.648555][ T6802] ? security_inode_permission+0xc4/0xf0 [ 61.654353][ T6802] vfs_mkdir+0x419/0x690 [ 61.658722][ T6802] do_mkdirat+0x21e/0x280 [ 61.663034][ T6802] ? __ia32_sys_mknod+0xb0/0xb0 [ 61.667886][ T6802] ? do_syscall_64+0x1c/0xe0 [ 61.672459][ T6802] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.678454][ T6802] do_syscall_64+0x60/0xe0 [ 61.683208][ T6802] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.689112][ T6802] RIP: 0033:0x45bee7 [ 61.692980][ T6802] Code: Bad RIP value. [ 61.697020][ T6802] RSP: 002b:00007ffd3ee5b648 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 61.705516][ T6802] RAX: ffffffffffffffda RBX: 000000000000f015 RCX: 000000000045bee7 [ 61.713480][ T6802] RDX: 00007ffd3ee5b693 RSI: 00000000000001ff RDI: 00007ffd3ee5b690 [ 61.721430][ T6802] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 2020/06/09 13:14:29 building call list... [ 61.729389][ T6802] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 61.737334][ T6802] R13: 00007ffd3ee5b680 R14: 000000000000effa R15: 00007ffd3ee5b690 [ 61.975320][ T70] tipc: TX() has been purged, node left! executing program [ 63.464850][ T6787] can: request_module (can-proto-0) failed. [ 63.511136][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 63.520536][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.526986][ T1155] CPU: 0 PID: 1155 Comm: khugepaged Not tainted 5.7.0-next-20200609-syzkaller #0 [ 63.536187][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.546319][ T1155] Call Trace: [ 63.549609][ T1155] dump_stack+0x18f/0x20d [ 63.553953][ T1155] check_preemption_disabled+0x20d/0x220 [ 63.559582][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.564688][ T1155] ? ext4_find_extent+0x81a/0xad0 [ 63.569713][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.575169][ T1155] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.580889][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.586178][ T1155] ? ext4_ext_release+0x10/0x10 [ 63.591042][ T1155] ? down_write_killable+0x170/0x170 [ 63.596433][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.601898][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 63.606765][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.611976][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.617519][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.623681][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 63.629137][ T1155] ext4_writepages+0x1a83/0x33c0 [ 63.634112][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.639760][ T1155] ? __lock_acquire+0x2224/0x48b0 [ 63.644828][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.650484][ T1155] ? do_writepages+0xf3/0x2a0 [ 63.655170][ T1155] do_writepages+0xf3/0x2a0 [ 63.659700][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 63.665319][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 63.670331][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 63.675512][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 63.680346][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 63.686046][ T1155] ? collapse_file+0x35a2/0x4330 [ 63.690989][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 63.697040][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 63.702228][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.708192][ T1155] collapse_file+0x35ac/0x4330 [ 63.713135][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 63.718487][ T1155] ? khugepaged+0x2506/0x3fc0 [ 63.723152][ T1155] ? xas_find+0x31a/0x880 [ 63.727462][ T1155] ? check_preemption_disabled+0x38/0x220 [ 63.733173][ T1155] khugepaged+0x3041/0x3fc0 [ 63.737673][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 63.743295][ T1155] ? lock_downgrade+0x840/0x840 [ 63.748126][ T1155] ? finish_wait+0x260/0x260 [ 63.752698][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 63.758656][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.764706][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 63.769711][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 63.775328][ T1155] kthread+0x3b5/0x4a0 [ 63.779392][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.785101][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.790975][ T1155] ret_from_fork+0x1f/0x30 [ 63.898585][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 63.907707][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.913583][ T1155] CPU: 0 PID: 1155 Comm: khugepaged Not tainted 5.7.0-next-20200609-syzkaller #0 [ 63.922663][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.932699][ T1155] Call Trace: [ 63.935972][ T1155] dump_stack+0x18f/0x20d [ 63.940298][ T1155] check_preemption_disabled+0x20d/0x220 [ 63.946002][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.951115][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.956553][ T1155] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 63.962708][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.967980][ T1155] ? ext4_ext_release+0x10/0x10 [ 63.972820][ T1155] ? down_write_killable+0x170/0x170 [ 63.978083][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.983541][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 63.988377][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.993819][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.999345][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.005308][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.010761][ T1155] ext4_writepages+0x1a83/0x33c0 [ 64.015825][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.021458][ T1155] ? __lock_acquire+0x2224/0x48b0 [ 64.026480][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.032097][ T1155] ? do_writepages+0xf3/0x2a0 [ 64.036753][ T1155] do_writepages+0xf3/0x2a0 [ 64.041243][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 64.046855][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 64.051862][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 64.057059][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 64.061916][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 64.067616][ T1155] ? collapse_file+0x35a2/0x4330 [ 64.072535][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 64.078588][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 64.083868][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.089829][ T1155] collapse_file+0x35ac/0x4330 [ 64.094581][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 64.099943][ T1155] ? khugepaged+0x2506/0x3fc0 [ 64.104618][ T1155] ? xas_find+0x31a/0x880 [ 64.108928][ T1155] ? check_preemption_disabled+0x38/0x220 [ 64.114633][ T1155] khugepaged+0x3041/0x3fc0 [ 64.119136][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 64.124851][ T1155] ? lock_downgrade+0x840/0x840 [ 64.129679][ T1155] ? finish_wait+0x260/0x260 [ 64.134257][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 64.140041][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.148715][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 64.153756][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 64.159576][ T1155] kthread+0x3b5/0x4a0 [ 64.163647][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.169347][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.175239][ T1155] ret_from_fork+0x1f/0x30 [ 64.226372][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 64.235586][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.241481][ T1155] CPU: 0 PID: 1155 Comm: khugepaged Not tainted 5.7.0-next-20200609-syzkaller #0 [ 64.250661][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.260708][ T1155] Call Trace: [ 64.263999][ T1155] dump_stack+0x18f/0x20d [ 64.268330][ T1155] check_preemption_disabled+0x20d/0x220 [ 64.273965][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.279100][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.284644][ T1155] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 64.290798][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.296091][ T1155] ? ext4_ext_release+0x10/0x10 [ 64.300958][ T1155] ? down_write_killable+0x170/0x170 [ 64.306257][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.312007][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 64.316897][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.322112][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.327664][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.333659][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.339125][ T1155] ext4_writepages+0x1a83/0x33c0 [ 64.344416][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.350064][ T1155] ? __lock_acquire+0x2224/0x48b0 [ 64.355196][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.360843][ T1155] ? do_writepages+0xf3/0x2a0 [ 64.365681][ T1155] do_writepages+0xf3/0x2a0 [ 64.370199][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 64.377299][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 64.382305][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 64.387485][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 64.392333][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 64.398052][ T1155] ? collapse_file+0x35a2/0x4330 [ 64.402969][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 64.409020][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 64.414207][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.420603][ T1155] collapse_file+0x35ac/0x4330 [ 64.425370][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 64.430753][ T1155] ? khugepaged+0x2506/0x3fc0 [ 64.435419][ T1155] ? xas_find+0x31a/0x880 [ 64.439749][ T1155] ? check_preemption_disabled+0x38/0x220 [ 64.445451][ T1155] khugepaged+0x3041/0x3fc0 [ 64.449984][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 64.455759][ T1155] ? lock_downgrade+0x840/0x840 [ 64.460603][ T1155] ? finish_wait+0x260/0x260 [ 64.465195][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 64.470985][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.476958][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 64.481971][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 64.487681][ T1155] kthread+0x3b5/0x4a0 [ 64.492277][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.497995][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.503728][ T1155] ret_from_fork+0x1f/0x30 [ 64.670916][ T6787] can: request_module (can-proto-0) failed. [ 64.682440][ T6787] can: request_module (can-proto-0) failed.