[ 54.075500][ T6807] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 54.081455][ T6807] ? prandom_u32_state+0xe/0x170 [ 54.086381][ T6807] ? __brelse+0x84/0xa0 [ 54.090522][ T6807] ? __ext4_new_inode+0x144/0x55e0 [ 54.095609][ T6807] ext4_getblk+0xad/0x520 [ 54.100037][ T6807] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 54.105805][ T6807] ? ext4_free_inode+0x1700/0x1700 [ 54.110938][ T6807] ext4_bread+0x7c/0x380 [ 54.115212][ T6807] ? ext4_getblk+0x520/0x520 [ 54.119793][ T6807] ? dquot_get_next_dqblk+0x180/0x180 [ 54.125151][ T6807] ext4_append+0x153/0x360 [ 54.129560][ T6807] ext4_mkdir+0x5e0/0xdf0 [ 54.133887][ T6807] ? ext4_rmdir+0xde0/0xde0 [ 54.138369][ T6807] ? security_inode_permission+0xc4/0xf0 [ 54.143981][ T6807] vfs_mkdir+0x419/0x690 [ 54.148204][ T6807] do_mkdirat+0x21e/0x280 [ 54.152509][ T6807] ? __ia32_sys_mknod+0xb0/0xb0 [ 54.157351][ T6807] ? do_syscall_64+0x1c/0xe0 [ 54.161924][ T6807] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 54.167878][ T6807] do_syscall_64+0x60/0xe0 [ 54.172269][ T6807] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 54.178134][ T6807] RIP: 0033:0x7fa23f71f687 [ 54.182519][ T6807] Code: Bad RIP value. [ 54.186569][ T6807] RSP: 002b:00007ffef0af1008 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 54.194957][ T6807] RAX: ffffffffffffffda RBX: 00005560d352f985 RCX: 00007fa23f71f687 [ 54.202901][ T6807] RDX: 00007ffef0af0ed0 RSI: 00000000000001ed RDI: 00005560d352f985 [ 54.210847][ T6807] RBP: 00007fa23f71f680 R08: 0000000000000100 R09: 0000000000000000 [ 54.218800][ T6807] R10: 00005560d352f980 R11: 0000000000000246 R12: 00000000000001ed [ 54.226743][ T6807] R13: 00007ffef0af1190 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.75' (ECDSA) to the list of known hosts. 2020/06/07 10:17:33 fuzzer started 2020/06/07 10:17:33 connecting to host at 10.128.0.26:45581 2020/06/07 10:17:33 checking machine... 2020/06/07 10:17:33 checking revisions... 2020/06/07 10:17:33 testing simple program... syzkaller login: [ 59.852853][ T6859] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6859 [ 59.861949][ T6859] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.867827][ T6859] CPU: 1 PID: 6859 Comm: syz-fuzzer Not tainted 5.7.0-next-20200605-syzkaller #0 [ 59.876904][ T6859] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.886934][ T6859] Call Trace: [ 59.890205][ T6859] dump_stack+0x18f/0x20d [ 59.894521][ T6859] check_preemption_disabled+0x20d/0x220 [ 59.900132][ T6859] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.905334][ T6859] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.910866][ T6859] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.916563][ T6859] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.921831][ T6859] ? ext4_ext_release+0x10/0x10 [ 59.926678][ T6859] ? down_write_killable+0x170/0x170 [ 59.931939][ T6859] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.937375][ T6859] ext4_map_blocks+0x4cb/0x1640 [ 59.942203][ T6859] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.947375][ T6859] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.952905][ T6859] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.958949][ T6859] ? prandom_u32_state+0xe/0x170 [ 59.963867][ T6859] ? __brelse+0x84/0xa0 [ 59.968015][ T6859] ? __ext4_new_inode+0x144/0x55e0 [ 59.973126][ T6859] ext4_getblk+0xad/0x520 [ 59.977456][ T6859] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.983156][ T6859] ? ext4_free_inode+0x1700/0x1700 [ 59.989146][ T6859] ext4_bread+0x7c/0x380 [ 59.993368][ T6859] ? ext4_getblk+0x520/0x520 [ 59.997937][ T6859] ? dquot_get_next_dqblk+0x180/0x180 [ 60.003319][ T6859] ext4_append+0x153/0x360 [ 60.008583][ T6859] ext4_mkdir+0x5e0/0xdf0 [ 60.012898][ T6859] ? ext4_rmdir+0xde0/0xde0 [ 60.017400][ T6859] ? security_inode_permission+0xc4/0xf0 [ 60.023016][ T6859] vfs_mkdir+0x419/0x690 [ 60.027430][ T6859] do_mkdirat+0x21e/0x280 [ 60.031756][ T6859] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.036586][ T6859] ? do_syscall_64+0x1c/0xe0 [ 60.041156][ T6859] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.047134][ T6859] do_syscall_64+0x60/0xe0 [ 60.051543][ T6859] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.057412][ T6859] RIP: 0033:0x4b02a0 [ 60.061294][ T6859] Code: Bad RIP value. [ 60.065346][ T6859] RSP: 002b:000000c0001214b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 60.073732][ T6859] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 60.081680][ T6859] RDX: 00000000000001c0 RSI: 000000c0000e4b60 RDI: ffffffffffffff9c [ 60.089715][ T6859] RBP: 000000c000121510 R08: 0000000000000000 R09: 0000000000000000 [ 60.097664][ T6859] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 60.105625][ T6859] R13: 000000000000005c R14: 000000000000005b R15: 0000000000000100 [ 60.129735][ T6871] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6871 [ 60.139351][ T6871] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.145244][ T6871] CPU: 0 PID: 6871 Comm: syz-executor.0 Not tainted 5.7.0-next-20200605-syzkaller #0 [ 60.154671][ T6871] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.164705][ T6871] Call Trace: [ 60.167980][ T6871] dump_stack+0x18f/0x20d [ 60.172293][ T6871] check_preemption_disabled+0x20d/0x220 [ 60.177919][ T6871] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.183031][ T6871] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.188485][ T6871] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.194182][ T6871] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.199448][ T6871] ? ext4_ext_release+0x10/0x10 [ 60.204287][ T6871] ? down_write_killable+0x170/0x170 [ 60.209549][ T6871] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.215000][ T6871] ext4_map_blocks+0x4cb/0x1640 [ 60.219832][ T6871] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.225017][ T6871] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.230555][ T6871] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.236517][ T6871] ? prandom_u32_state+0xe/0x170 [ 60.241452][ T6871] ? __brelse+0x84/0xa0 [ 60.245584][ T6871] ? __ext4_new_inode+0x144/0x55e0 [ 60.250673][ T6871] ext4_getblk+0xad/0x520 [ 60.254998][ T6871] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.260698][ T6871] ? ext4_free_inode+0x1700/0x1700 [ 60.265802][ T6871] ext4_bread+0x7c/0x380 [ 60.270027][ T6871] ? ext4_getblk+0x520/0x520 [ 60.274595][ T6871] ? dquot_get_next_dqblk+0x180/0x180 [ 60.279960][ T6871] ext4_append+0x153/0x360 [ 60.284355][ T6871] ext4_mkdir+0x5e0/0xdf0 [ 60.288665][ T6871] ? ext4_rmdir+0xde0/0xde0 [ 60.293146][ T6871] ? security_inode_permission+0xc4/0xf0 [ 60.298758][ T6871] vfs_mkdir+0x419/0x690 [ 60.302977][ T6871] do_mkdirat+0x21e/0x280 [ 60.307294][ T6871] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.312134][ T6871] ? do_syscall_64+0x1c/0xe0 [ 60.316710][ T6871] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.322675][ T6871] do_syscall_64+0x60/0xe0 [ 60.327069][ T6871] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.332936][ T6871] RIP: 0033:0x45bee7 [ 60.336813][ T6871] Code: Bad RIP value. [ 60.340950][ T6871] RSP: 002b:00007ffdea49ae28 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 60.349332][ T6871] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 60.358851][ T6871] RDX: 0000000000000002 RSI: 00000000000001c0 RDI: 00007ffdea49b000 [ 60.366813][ T6871] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000002d00 [ 60.374894][ T6871] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 60.382850][ T6871] R13: 00007ffdea49b000 R14: 8421084210842109 R15: 00007ffdea49b00c [ 60.437537][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 60.447744][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.453764][ T1155] CPU: 1 PID: 1155 Comm: khugepaged Not tainted 5.7.0-next-20200605-syzkaller #0 [ 60.462862][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.473290][ T1155] Call Trace: [ 60.476576][ T1155] dump_stack+0x18f/0x20d [ 60.480892][ T1155] check_preemption_disabled+0x20d/0x220 [ 60.486520][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.491635][ T1155] ? ext4_find_extent+0x81a/0xad0 [ 60.494636][ T6872] IPVS: ftp: loaded support on port[0] = 21 [ 60.496663][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.507980][ T1155] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.513712][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.519010][ T1155] ? ext4_ext_release+0x10/0x10 [ 60.523886][ T1155] ? down_write_killable+0x170/0x170 [ 60.529173][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.534639][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 60.539503][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.544718][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.550275][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.556268][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 60.558265][ T6872] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6872 [ 60.561759][ T1155] ext4_writepages+0x1a7b/0x33c0 [ 60.561780][ T1155] ? lock_release+0x710/0x800 [ 60.561806][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.561845][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.571247][ T6872] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.576101][ T1155] ? do_writepages+0xfa/0x2a0 [ 60.602516][ T1155] do_writepages+0xfa/0x2a0 [ 60.607009][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 60.612623][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 60.617628][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 60.622810][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 60.627647][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 60.633360][ T1155] ? collapse_file+0x35a2/0x4330 [ 60.638280][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 60.644349][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 60.649549][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.655525][ T1155] collapse_file+0x35ac/0x4330 [ 60.660288][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 60.665641][ T1155] ? khugepaged+0x2506/0x3fc0 [ 60.670309][ T1155] ? xas_find+0x31a/0x880 [ 60.674621][ T1155] ? check_preemption_disabled+0x38/0x220 [ 60.680427][ T1155] khugepaged+0x3041/0x3fc0 [ 60.684972][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 60.690595][ T1155] ? lock_downgrade+0x840/0x840 [ 60.695436][ T1155] ? finish_wait+0x260/0x260 [ 60.700013][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 60.705812][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.711781][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 60.716789][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 60.722405][ T1155] kthread+0x3b5/0x4a0 [ 60.726460][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.732158][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.737861][ T1155] ret_from_fork+0x1f/0x30 [ 60.742282][ T6872] CPU: 0 PID: 6872 Comm: syz-executor.0 Not tainted 5.7.0-next-20200605-syzkaller #0 [ 60.751741][ T6872] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.761804][ T6872] Call Trace: [ 60.765097][ T6872] dump_stack+0x18f/0x20d [ 60.769452][ T6872] check_preemption_disabled+0x20d/0x220 [ 60.775068][ T6872] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.780184][ T6872] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.785633][ T6872] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.791358][ T6872] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.796643][ T6872] ? ext4_ext_release+0x10/0x10 [ 60.801509][ T6872] ? down_write_killable+0x170/0x170 [ 60.806798][ T6872] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.812339][ T6872] ext4_map_blocks+0x4cb/0x1640 [ 60.817175][ T6872] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.821643][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 60.822358][ T6872] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.822376][ T6872] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.831419][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.837868][ T6872] ? prandom_u32_state+0xe/0x170 [ 60.837887][ T6872] ? __brelse+0x84/0xa0 [ 60.837903][ T6872] ? __ext4_new_inode+0x144/0x55e0 [ 60.837920][ T6872] ext4_getblk+0xad/0x520 [ 60.837937][ T6872] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.837964][ T6872] ? ext4_free_inode+0x1700/0x1700 [ 60.881195][ T6872] ext4_bread+0x7c/0x380 [ 60.885450][ T6872] ? ext4_getblk+0x520/0x520 [ 60.890029][ T6872] ? dquot_get_next_dqblk+0x180/0x180 [ 60.895390][ T6872] ext4_append+0x153/0x360 [ 60.899797][ T6872] ext4_mkdir+0x5e0/0xdf0 [ 60.904133][ T6872] ? ext4_rmdir+0xde0/0xde0 [ 60.908623][ T6872] ? security_inode_permission+0xc4/0xf0 [ 60.914246][ T6872] vfs_mkdir+0x419/0x690 [ 60.918474][ T6872] do_mkdirat+0x21e/0x280 [ 60.922806][ T6872] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.927643][ T6872] ? do_syscall_64+0x1c/0xe0 [ 60.932218][ T6872] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.938198][ T6872] do_syscall_64+0x60/0xe0 [ 60.942597][ T6872] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.948495][ T6872] RIP: 0033:0x45bee7 [ 60.952381][ T6872] Code: Bad RIP value. [ 60.956429][ T6872] RSP: 002b:00007ffdea49ad18 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 60.964823][ T6872] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 60.972794][ T6872] RDX: 00007ffdea49ad63 RSI: 00000000000001ff RDI: 00007ffdea49ad60 [ 60.980745][ T6872] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 60.988706][ T6872] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185d0 [ 60.996660][ T6872] R13: 00007ffdea49ad50 R14: 0000000000000000 R15: 00007ffdea49ad60 [ 61.004652][ T1155] CPU: 1 PID: 1155 Comm: khugepaged Not tainted 5.7.0-next-20200605-syzkaller #0 [ 61.013763][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.023991][ T1155] Call Trace: [ 61.027288][ T1155] dump_stack+0x18f/0x20d [ 61.031630][ T1155] check_preemption_disabled+0x20d/0x220 [ 61.037274][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.046228][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.051699][ T1155] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 61.057862][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.063176][ T1155] ? ext4_ext_release+0x10/0x10 [ 61.070311][ T1155] ? down_write_killable+0x170/0x170 [ 61.075604][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.081508][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 61.086473][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.091688][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.097247][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.103240][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 61.108711][ T1155] ext4_writepages+0x1a7b/0x33c0 [ 61.113659][ T1155] ? lock_release+0x710/0x800 [ 61.118358][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.124455][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.131055][ T1155] ? do_writepages+0xfa/0x2a0 [ 61.135738][ T1155] do_writepages+0xfa/0x2a0 [ 61.140257][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 61.145892][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 61.152150][ T6872] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6872 [ 61.158550][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 61.167980][ T6872] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.173077][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 61.173097][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 61.173111][ T1155] ? collapse_file+0x35a2/0x4330 [ 61.173125][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 61.173150][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 61.173165][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.173186][ T1155] collapse_file+0x35ac/0x4330 [ 61.217110][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 61.222467][ T1155] ? khugepaged+0x2506/0x3fc0 [ 61.227135][ T1155] ? xas_find+0x31a/0x880 [ 61.231471][ T1155] ? check_preemption_disabled+0x38/0x220 [ 61.237194][ T1155] khugepaged+0x3041/0x3fc0 [ 61.241704][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 61.247320][ T1155] ? lock_downgrade+0x840/0x840 [ 61.252156][ T1155] ? finish_wait+0x260/0x260 [ 61.256728][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 61.262520][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.268487][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 61.273514][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 61.279128][ T1155] kthread+0x3b5/0x4a0 [ 61.283201][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.288908][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.294613][ T1155] ret_from_fork+0x1f/0x30 [ 61.299027][ T6872] CPU: 0 PID: 6872 Comm: syz-executor.0 Not tainted 5.7.0-next-20200605-syzkaller #0 [ 61.309179][ T6872] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.319413][ T6872] Call Trace: [ 61.322712][ T6872] dump_stack+0x18f/0x20d [ 61.327046][ T6872] check_preemption_disabled+0x20d/0x220 [ 61.332775][ T6872] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.337902][ T6872] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.343365][ T6872] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 61.349089][ T6872] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.354648][ T6872] ? ext4_ext_release+0x10/0x10 [ 61.359517][ T6872] ? down_write_killable+0x170/0x170 [ 61.364806][ T6872] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.371249][ T6872] ext4_map_blocks+0x4cb/0x1640 [ 61.372160][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 61.376123][ T6872] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.385278][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.391373][ T6872] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.391390][ T6872] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.391404][ T6872] ? prandom_u32_state+0xe/0x170 [ 61.391421][ T6872] ? __brelse+0x84/0xa0 [ 61.391438][ T6872] ? __ext4_new_inode+0x144/0x55e0 [ 61.391455][ T6872] ext4_getblk+0xad/0x520 [ 61.428146][ T6872] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 61.433867][ T6872] ? ext4_free_inode+0x1700/0x1700 [ 61.438981][ T6872] ext4_bread+0x7c/0x380 [ 61.443207][ T6872] ? ext4_getblk+0x520/0x520 [ 61.447781][ T6872] ? dquot_get_next_dqblk+0x180/0x180 [ 61.453143][ T6872] ext4_append+0x153/0x360 [ 61.457565][ T6872] ext4_mkdir+0x5e0/0xdf0 [ 61.462077][ T6872] ? ext4_rmdir+0xde0/0xde0 [ 61.466567][ T6872] ? security_inode_permission+0xc4/0xf0 [ 61.473152][ T6872] vfs_mkdir+0x419/0x690 [ 61.477556][ T6872] do_mkdirat+0x21e/0x280 [ 61.481872][ T6872] ? __ia32_sys_mknod+0xb0/0xb0 [ 61.486708][ T6872] ? do_syscall_64+0x1c/0xe0 [ 61.496691][ T6872] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.502674][ T6872] do_syscall_64+0x60/0xe0 [ 61.507075][ T6872] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.512963][ T6872] RIP: 0033:0x45bee7 [ 61.516855][ T6872] Code: Bad RIP value. [ 61.520926][ T6872] RSP: 002b:00007ffdea49ad18 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 61.530011][ T6872] RAX: ffffffffffffffda RBX: 000000000000ee74 RCX: 000000000045bee7 [ 61.537975][ T6872] RDX: 00007ffdea49ad63 RSI: 00000000000001ff RDI: 00007ffdea49ad60 [ 61.545941][ T6872] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 61.553913][ T6872] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 61.561878][ T6872] R13: 00007ffdea49ad50 R14: 000000000000ee04 R15: 00007ffdea49ad60 [ 61.569853][ T1155] CPU: 1 PID: 1155 Comm: khugepaged Not tainted 5.7.0-next-20200605-syzkaller #0 [ 61.578960][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.589016][ T1155] Call Trace: [ 61.592344][ T1155] dump_stack+0x18f/0x20d [ 61.596682][ T1155] check_preemption_disabled+0x20d/0x220 [ 61.602314][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.607425][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.612872][ T1155] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 61.619082][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.624369][ T1155] ? ext4_ext_release+0x10/0x10 [ 61.629243][ T1155] ? down_write_killable+0x170/0x170 [ 61.634529][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.640097][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 61.644938][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.650125][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.655673][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.661635][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 61.667089][ T1155] ext4_writepages+0x1a7b/0x33c0 [ 61.672013][ T1155] ? lock_release+0x710/0x800 [ 61.676678][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.683263][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.689024][ T1155] ? do_writepages+0xfa/0x2a0 [ 61.693693][ T1155] do_writepages+0xfa/0x2a0 [ 61.698193][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 61.703825][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 61.710746][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 61.715950][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 61.720831][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 61.726542][ T1155] ? collapse_file+0x35a2/0x4330 [ 61.731464][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 61.737525][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 61.742707][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.748700][ T1155] collapse_file+0x35ac/0x4330 [ 61.753475][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 61.758826][ T1155] ? khugepaged+0x2506/0x3fc0 [ 61.763530][ T1155] ? xas_find+0x31a/0x880 [ 61.767859][ T1155] ? check_preemption_disabled+0x38/0x220 [ 61.773562][ T1155] khugepaged+0x3041/0x3fc0 [ 61.778156][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 61.783791][ T1155] ? lock_downgrade+0x840/0x840 [ 61.788640][ T1155] ? finish_wait+0x260/0x260 [ 61.793220][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 61.799005][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.804970][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 61.809994][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 61.815607][ T1155] kthread+0x3b5/0x4a0 [ 61.819661][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.826487][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.832196][ T1155] ret_from_fork+0x1f/0x30 2020/06/07 10:17:36 building call list... [ 62.037384][ T7] tipc: TX() has been purged, node left! executing program [ 63.736067][ T6854] can: request_module (can-proto-0) failed. [ 64.149405][ T6854] can: request_module (can-proto-0) failed. [ 64.161354][ T6854] can: request_module (can-proto-0) failed.