[ 50.683876][ T6720] RAX: ffffffffffffffda RBX: 000055d2c4b2d985 RCX: 00007f6bfd02e687 [ 50.683884][ T6720] RDX: 00007fffa862ba60 RSI: 00000000000001ed RDI: 000055d2c4b2d985 [ 50.683893][ T6720] RBP: 00007f6bfd02e680 R08: 0000000000000100 R09: 0000000000000000 [ 50.683901][ T6720] R10: 000055d2c4b2d980 R11: 0000000000000246 R12: 00000000000001ed [ 50.683910][ T6720] R13: 00007fffa862bd20 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.79' (ECDSA) to the list of known hosts. 2020/06/02 11:03:51 fuzzer started 2020/06/02 11:03:52 connecting to host at 10.128.0.26:39369 2020/06/02 11:03:52 checking machine... 2020/06/02 11:03:52 checking revisions... 2020/06/02 11:03:52 testing simple program... syzkaller login: [ 59.806466][ T6792] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6792 [ 59.815692][ T6792] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.821714][ T6792] CPU: 1 PID: 6792 Comm: syz-fuzzer Not tainted 5.7.0-next-20200602-syzkaller #0 [ 59.830866][ T6792] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.840909][ T6792] Call Trace: [ 59.844178][ T6792] dump_stack+0x18f/0x20d [ 59.848512][ T6792] check_preemption_disabled+0x20d/0x220 [ 59.854126][ T6792] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.859396][ T6792] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.864840][ T6792] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.870593][ T6792] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.875905][ T6792] ? ext4_ext_release+0x10/0x10 [ 59.880748][ T6792] ? down_write_killable+0x170/0x170 [ 59.886005][ T6792] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.891443][ T6792] ext4_map_blocks+0x4cb/0x1640 [ 59.896274][ T6792] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.901461][ T6792] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.906982][ T6792] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.912999][ T6792] ? prandom_u32_state+0xe/0x170 [ 59.917913][ T6792] ? __brelse+0x84/0xa0 [ 59.922043][ T6792] ? __ext4_new_inode+0x144/0x55e0 [ 59.927130][ T6792] ext4_getblk+0xad/0x520 [ 59.931435][ T6792] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.937131][ T6792] ? ext4_free_inode+0x1700/0x1700 [ 59.942219][ T6792] ext4_bread+0x7c/0x380 [ 59.946481][ T6792] ? ext4_getblk+0x520/0x520 [ 59.951046][ T6792] ? dquot_get_next_dqblk+0x180/0x180 [ 59.956396][ T6792] ext4_append+0x153/0x360 [ 59.960807][ T6792] ext4_mkdir+0x5e0/0xdf0 [ 59.965115][ T6792] ? ext4_rmdir+0xde0/0xde0 [ 59.969593][ T6792] ? security_inode_permission+0xc4/0xf0 [ 59.975203][ T6792] vfs_mkdir+0x419/0x690 [ 59.979423][ T6792] do_mkdirat+0x21e/0x280 [ 59.983732][ T6792] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.988576][ T6792] ? do_syscall_64+0x1c/0xe0 [ 59.993170][ T6792] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.999133][ T6792] do_syscall_64+0x60/0xe0 [ 60.003526][ T6792] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.009423][ T6792] RIP: 0033:0x4b02a0 [ 60.013286][ T6792] Code: Bad RIP value. [ 60.017323][ T6792] RSP: 002b:000000c00010d4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 60.025720][ T6792] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 60.033663][ T6792] RDX: 00000000000001c0 RSI: 000000c000026b40 RDI: ffffffffffffff9c [ 60.041628][ T6792] RBP: 000000c00010d510 R08: 0000000000000000 R09: 0000000000000000 [ 60.049586][ T6792] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 60.057530][ T6792] R13: 000000000000005b R14: 000000000000005a R15: 0000000000000100 [ 60.080208][ T6802] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6802 [ 60.090206][ T6802] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.096077][ T6802] CPU: 0 PID: 6802 Comm: syz-executor.0 Not tainted 5.7.0-next-20200602-syzkaller #0 [ 60.105498][ T6802] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.115524][ T6802] Call Trace: [ 60.118789][ T6802] dump_stack+0x18f/0x20d [ 60.123098][ T6802] check_preemption_disabled+0x20d/0x220 [ 60.128705][ T6802] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.133797][ T6802] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.139317][ T6802] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.145014][ T6802] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.150278][ T6802] ? ext4_ext_release+0x10/0x10 [ 60.155114][ T6802] ? down_write_killable+0x170/0x170 [ 60.160373][ T6802] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.165811][ T6802] ext4_map_blocks+0x4cb/0x1640 [ 60.170647][ T6802] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.175821][ T6802] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.181344][ T6802] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.187314][ T6802] ? prandom_u32_state+0xe/0x170 [ 60.192237][ T6802] ? __brelse+0x84/0xa0 [ 60.196369][ T6802] ? __ext4_new_inode+0x144/0x55e0 [ 60.201523][ T6802] ext4_getblk+0xad/0x520 [ 60.205833][ T6802] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.211530][ T6802] ? ext4_free_inode+0x1700/0x1700 [ 60.216615][ T6802] ext4_bread+0x7c/0x380 [ 60.220835][ T6802] ? ext4_getblk+0x520/0x520 [ 60.225399][ T6802] ? dquot_get_next_dqblk+0x180/0x180 [ 60.230751][ T6802] ext4_append+0x153/0x360 [ 60.235161][ T6802] ext4_mkdir+0x5e0/0xdf0 [ 60.239474][ T6802] ? ext4_rmdir+0xde0/0xde0 [ 60.243958][ T6802] ? security_inode_permission+0xc4/0xf0 [ 60.249573][ T6802] vfs_mkdir+0x419/0x690 [ 60.253817][ T6802] do_mkdirat+0x21e/0x280 [ 60.258124][ T6802] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.262954][ T6802] ? do_syscall_64+0x1c/0xe0 [ 60.267526][ T6802] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.273483][ T6802] do_syscall_64+0x60/0xe0 [ 60.277934][ T6802] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.283823][ T6802] RIP: 0033:0x45bee7 [ 60.287702][ T6802] Code: Bad RIP value. [ 60.291741][ T6802] RSP: 002b:00007ffe20a8da48 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 60.300175][ T6802] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 60.308127][ T6802] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffe20a8dc20 [ 60.316074][ T6802] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003100 [ 60.324023][ T6802] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 60.331971][ T6802] R13: 00007ffe20a8dc20 R14: 8421084210842109 R15: 00007ffe20a8dc2c [ 60.414993][ T6803] IPVS: ftp: loaded support on port[0] = 21 [ 60.450123][ T6803] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6803 [ 60.459690][ T6803] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.465560][ T6803] CPU: 1 PID: 6803 Comm: syz-executor.0 Not tainted 5.7.0-next-20200602-syzkaller #0 [ 60.474987][ T6803] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.485072][ T6803] Call Trace: [ 60.488339][ T6803] dump_stack+0x18f/0x20d [ 60.492689][ T6803] check_preemption_disabled+0x20d/0x220 [ 60.498297][ T6803] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.503394][ T6803] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.508867][ T6803] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.514585][ T6803] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.519850][ T6803] ? ext4_ext_release+0x10/0x10 [ 60.524687][ T6803] ? down_write_killable+0x170/0x170 [ 60.529945][ T6803] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.535382][ T6803] ext4_map_blocks+0x4cb/0x1640 [ 60.540214][ T6803] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.545385][ T6803] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.550906][ T6803] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.556856][ T6803] ? prandom_u32_state+0xe/0x170 [ 60.561780][ T6803] ? __brelse+0x84/0xa0 [ 60.565921][ T6803] ? __ext4_new_inode+0x144/0x55e0 [ 60.571009][ T6803] ext4_getblk+0xad/0x520 [ 60.575315][ T6803] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.581012][ T6803] ? ext4_free_inode+0x1700/0x1700 [ 60.586098][ T6803] ext4_bread+0x7c/0x380 [ 60.590330][ T6803] ? ext4_getblk+0x520/0x520 [ 60.594894][ T6803] ? dquot_get_next_dqblk+0x180/0x180 [ 60.600258][ T6803] ext4_append+0x153/0x360 [ 60.604650][ T6803] ext4_mkdir+0x5e0/0xdf0 [ 60.608958][ T6803] ? ext4_rmdir+0xde0/0xde0 [ 60.613439][ T6803] ? security_inode_permission+0xc4/0xf0 [ 60.619073][ T6803] vfs_mkdir+0x419/0x690 [ 60.623291][ T6803] do_mkdirat+0x21e/0x280 [ 60.627598][ T6803] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.632421][ T6803] ? do_syscall_64+0x1c/0xe0 [ 60.636985][ T6803] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.642945][ T6803] do_syscall_64+0x60/0xe0 [ 60.647337][ T6803] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.653213][ T6803] RIP: 0033:0x45bee7 [ 60.657075][ T6803] Code: Bad RIP value. [ 60.661109][ T6803] RSP: 002b:00007ffe20a8d938 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 60.669490][ T6803] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 60.677449][ T6803] RDX: 00007ffe20a8d983 RSI: 00000000000001ff RDI: 00007ffe20a8d980 [ 60.685390][ T6803] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 60.693344][ T6803] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185d0 [ 60.701293][ T6803] R13: 00007ffe20a8d970 R14: 0000000000000000 R15: 00007ffe20a8d980 [ 60.752171][ T6803] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6803 [ 60.761762][ T6803] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.767722][ T6803] CPU: 0 PID: 6803 Comm: syz-executor.0 Not tainted 5.7.0-next-20200602-syzkaller #0 [ 60.777165][ T6803] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.787220][ T6803] Call Trace: [ 60.790512][ T6803] dump_stack+0x18f/0x20d [ 60.794850][ T6803] check_preemption_disabled+0x20d/0x220 [ 60.800485][ T6803] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.805604][ T6803] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.811063][ T6803] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.816778][ T6803] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.822062][ T6803] ? ext4_ext_release+0x10/0x10 [ 60.826936][ T6803] ? down_write_killable+0x170/0x170 [ 60.832213][ T6803] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.837673][ T6803] ext4_map_blocks+0x4cb/0x1640 [ 60.842514][ T6803] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.847701][ T6803] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.853234][ T6803] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.859193][ T6803] ? prandom_u32_state+0xe/0x170 [ 60.864110][ T6803] ? __brelse+0x84/0xa0 [ 60.868258][ T6803] ? __ext4_new_inode+0x144/0x55e0 [ 60.873346][ T6803] ext4_getblk+0xad/0x520 [ 60.877654][ T6803] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.883361][ T6803] ? ext4_free_inode+0x1700/0x1700 [ 60.888450][ T6803] ext4_bread+0x7c/0x380 [ 60.892666][ T6803] ? ext4_getblk+0x520/0x520 [ 60.897231][ T6803] ? dquot_get_next_dqblk+0x180/0x180 [ 60.902586][ T6803] ext4_append+0x153/0x360 [ 60.906990][ T6803] ext4_mkdir+0x5e0/0xdf0 [ 60.911314][ T6803] ? ext4_rmdir+0xde0/0xde0 [ 60.915798][ T6803] ? security_inode_permission+0xc4/0xf0 [ 60.921413][ T6803] vfs_mkdir+0x419/0x690 [ 60.925647][ T6803] do_mkdirat+0x21e/0x280 [ 60.929955][ T6803] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.934782][ T6803] ? do_syscall_64+0x1c/0xe0 [ 60.939348][ T6803] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.945319][ T6803] do_syscall_64+0x60/0xe0 [ 60.949713][ T6803] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.955589][ T6803] RIP: 0033:0x45bee7 [ 60.959452][ T6803] Code: Bad RIP value. [ 60.963489][ T6803] RSP: 002b:00007ffe20a8d938 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 60.971889][ T6803] RAX: ffffffffffffffda RBX: 000000000000ed43 RCX: 000000000045bee7 [ 60.979839][ T6803] RDX: 00007ffe20a8d983 RSI: 00000000000001ff RDI: 00007ffe20a8d980 [ 60.987819][ T6803] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 2020/06/02 11:03:53 building call list... [ 60.995765][ T6803] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 61.003715][ T6803] R13: 00007ffe20a8d970 R14: 000000000000ed39 R15: 00007ffe20a8d980 [ 61.256906][ T26] tipc: TX() has been purged, node left! executing program [ 62.665041][ T6786] can: request_module (can-proto-0) failed. [ 62.822735][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 62.831987][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 62.837951][ T1155] CPU: 1 PID: 1155 Comm: khugepaged Not tainted 5.7.0-next-20200602-syzkaller #0 [ 62.847045][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.857086][ T1155] Call Trace: [ 62.860379][ T1155] dump_stack+0x18f/0x20d [ 62.864839][ T1155] check_preemption_disabled+0x20d/0x220 [ 62.870473][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 62.875577][ T1155] ? ext4_find_extent+0x81a/0xad0 [ 62.880605][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 62.886059][ T1155] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 62.891780][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 62.897070][ T1155] ? ext4_ext_release+0x10/0x10 [ 62.901935][ T1155] ? down_write_killable+0x170/0x170 [ 62.907211][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 62.912671][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 62.917528][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 62.922731][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.928275][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.934246][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 62.939697][ T1155] ext4_writepages+0x1ab5/0x3400 [ 62.944632][ T1155] ? mark_lock+0x20/0xdd0 [ 62.948969][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 62.954623][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 62.960246][ T1155] ? do_writepages+0xfa/0x2a0 [ 62.964911][ T1155] do_writepages+0xfa/0x2a0 [ 62.969419][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 62.975048][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 62.980062][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 62.985241][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 62.990081][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 62.995776][ T1155] ? collapse_file+0x35a2/0x4330 [ 63.000688][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 63.006734][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 63.011909][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.017933][ T1155] collapse_file+0x35ac/0x4330 [ 63.022730][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 63.028077][ T1155] ? khugepaged+0x2506/0x3fc0 [ 63.032735][ T1155] ? xas_find+0x31a/0x880 [ 63.037096][ T1155] ? check_preemption_disabled+0x38/0x220 [ 63.042835][ T1155] khugepaged+0x3041/0x3fc0 [ 63.047330][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 63.052938][ T1155] ? lock_downgrade+0x840/0x840 [ 63.057763][ T1155] ? finish_wait+0x260/0x260 [ 63.062384][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 63.068164][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.074119][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 63.079120][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 63.084744][ T1155] kthread+0x3b5/0x4a0 [ 63.088788][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.094479][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.100172][ T1155] ret_from_fork+0x1f/0x30 [ 63.165115][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 63.174324][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.180289][ T1155] CPU: 1 PID: 1155 Comm: khugepaged Not tainted 5.7.0-next-20200602-syzkaller #0 [ 63.189382][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.199410][ T1155] Call Trace: [ 63.202676][ T1155] dump_stack+0x18f/0x20d [ 63.207075][ T1155] check_preemption_disabled+0x20d/0x220 [ 63.212684][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.217776][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.223215][ T1155] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 63.229349][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.234614][ T1155] ? ext4_ext_release+0x10/0x10 [ 63.239455][ T1155] ? down_write_killable+0x170/0x170 [ 63.244721][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.250158][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 63.254987][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.260163][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.265682][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.271651][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 63.277220][ T1155] ext4_writepages+0x1ab5/0x3400 [ 63.282135][ T1155] ? mark_lock+0x20/0xdd0 [ 63.286447][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.292069][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.297675][ T1155] ? do_writepages+0xfa/0x2a0 [ 63.302327][ T1155] do_writepages+0xfa/0x2a0 [ 63.306809][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 63.312465][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 63.317465][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 63.322653][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 63.327479][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 63.333171][ T1155] ? collapse_file+0x35a2/0x4330 [ 63.338082][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 63.344125][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 63.349311][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.355268][ T1155] collapse_file+0x35ac/0x4330 [ 63.360193][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 63.365551][ T1155] ? khugepaged+0x2506/0x3fc0 [ 63.370225][ T1155] ? xas_find+0x31a/0x880 [ 63.374532][ T1155] ? check_preemption_disabled+0x38/0x220 [ 63.380226][ T1155] khugepaged+0x3041/0x3fc0 [ 63.384715][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 63.390335][ T1155] ? lock_downgrade+0x840/0x840 [ 63.395166][ T1155] ? finish_wait+0x260/0x260 [ 63.399750][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 63.405545][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.411504][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 63.416504][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 63.422125][ T1155] kthread+0x3b5/0x4a0 [ 63.426166][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.431862][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.437557][ T1155] ret_from_fork+0x1f/0x30 [ 63.484963][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 63.494136][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.500119][ T1155] CPU: 1 PID: 1155 Comm: khugepaged Not tainted 5.7.0-next-20200602-syzkaller #0 [ 63.509211][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.519253][ T1155] Call Trace: [ 63.522541][ T1155] dump_stack+0x18f/0x20d [ 63.526959][ T1155] check_preemption_disabled+0x20d/0x220 [ 63.532591][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.537707][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.543162][ T1155] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 63.549309][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.554597][ T1155] ? ext4_ext_release+0x10/0x10 [ 63.559456][ T1155] ? down_write_killable+0x170/0x170 [ 63.564732][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.570183][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 63.575018][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.580239][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.585768][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.591720][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 63.597196][ T1155] ext4_writepages+0x1ab5/0x3400 [ 63.602111][ T1155] ? mark_lock+0x20/0xdd0 [ 63.606459][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.612095][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.617702][ T1155] ? do_writepages+0xfa/0x2a0 [ 63.625567][ T1155] do_writepages+0xfa/0x2a0 [ 63.630067][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 63.635674][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 63.640685][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 63.645860][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 63.650702][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 63.656397][ T1155] ? collapse_file+0x35a2/0x4330 [ 63.661393][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 63.667453][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 63.672624][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.678581][ T1155] collapse_file+0x35ac/0x4330 [ 63.683353][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 63.688711][ T1155] ? khugepaged+0x2506/0x3fc0 [ 63.693372][ T1155] ? xas_find+0x31a/0x880 [ 63.697683][ T1155] ? check_preemption_disabled+0x38/0x220 [ 63.703433][ T1155] khugepaged+0x3041/0x3fc0 [ 63.707940][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 63.713551][ T1155] ? lock_downgrade+0x840/0x840 [ 63.718382][ T1155] ? finish_wait+0x260/0x260 [ 63.722949][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 63.728731][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.734691][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 63.739694][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 63.745419][ T1155] kthread+0x3b5/0x4a0 [ 63.749465][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.755201][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.760899][ T1155] ret_from_fork+0x1f/0x30 [ 63.931715][ T6786] can: request_module (can-proto-0) failed. [ 63.942709][ T6786] can: request_module (can-proto-0) failed.