[ 58.381094][ T4195] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 58.386990][ T4195] ? cpumask_next+0x3c/0x40 [ 58.391497][ T4195] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.396708][ T4195] wb_workfn+0xab3/0x1090 [ 58.401040][ T4195] ? inode_wait_for_writeback+0x30/0x30 [ 58.406577][ T4195] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.412110][ T4195] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.418096][ T4195] process_one_work+0x965/0x1690 [ 58.423043][ T4195] ? lock_release+0x800/0x800 [ 58.427706][ T4195] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.433067][ T4195] ? rwlock_bug.part.0+0x90/0x90 [ 58.437996][ T4195] worker_thread+0x96/0xe10 [ 58.442493][ T4195] ? process_one_work+0x1690/0x1690 [ 58.447677][ T4195] kthread+0x3b5/0x4a0 [ 58.451732][ T4195] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.457435][ T4195] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.463159][ T4195] ret_from_fork+0x1f/0x30 [ 58.467580][ T6730] CPU: 1 PID: 6730 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 [ 58.476263][ T6730] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.486409][ T6730] Call Trace: [ 58.489714][ T6730] dump_stack+0x18f/0x20d [ 58.494078][ T6730] check_preemption_disabled+0x20d/0x220 [ 58.499700][ T6730] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.504807][ T6730] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.510249][ T6730] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.515956][ T6730] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.521252][ T6730] ? ext4_ext_release+0x10/0x10 [ 58.526154][ T6730] ? down_write_killable+0x170/0x170 [ 58.531493][ T6730] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.536961][ T6730] ext4_map_blocks+0x4cb/0x1640 [ 58.542155][ T6730] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.542174][ T6730] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.542193][ T6730] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.542209][ T6730] ? prandom_u32_state+0xe/0x170 [ 58.542229][ T6730] ? __brelse+0x84/0xa0 [ 58.542246][ T6730] ? __ext4_new_inode+0x144/0x55e0 [ 58.542268][ T6730] ext4_getblk+0xad/0x520 [ 58.542289][ T6730] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.542313][ T6730] ? ext4_free_inode+0x1700/0x1700 [ 58.542334][ T6730] ext4_bread+0x7c/0x380 [ 58.542351][ T6730] ? ext4_getblk+0x520/0x520 [ 58.542368][ T6730] ? dquot_get_next_dqblk+0x180/0x180 [ 58.542393][ T6730] ext4_append+0x153/0x360 [ 58.542416][ T6730] ext4_mkdir+0x5e0/0xdf0 [ 58.542442][ T6730] ? ext4_rmdir+0xde0/0xde0 [ 58.542463][ T6730] ? security_inode_permission+0xc4/0xf0 [ 58.542489][ T6730] vfs_mkdir+0x419/0x690 [ 58.542510][ T6730] do_mkdirat+0x21e/0x280 [ 58.542530][ T6730] ? __ia32_sys_mknod+0xb0/0xb0 [ 58.542549][ T6730] ? do_syscall_64+0x1c/0xe0 [ 58.542567][ T6730] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.542588][ T6730] do_syscall_64+0x60/0xe0 [ 58.542606][ T6730] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.542619][ T6730] RIP: 0033:0x7fd20d5bc687 [ 58.542625][ T6730] Code: Bad RIP value. [ 58.542632][ T6730] RSP: 002b:00007ffd7a797df8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 58.542646][ T6730] RAX: ffffffffffffffda RBX: 00005616fb9e0985 RCX: 00007fd20d5bc687 [ 58.542655][ T6730] RDX: 00007ffd7a797cc0 RSI: 00000000000001ed RDI: 00005616fb9e0985 [ 58.542663][ T6730] RBP: 00007fd20d5bc680 R08: 0000000000000100 R09: 0000000000000000 [ 58.542672][ T6730] R10: 00005616fb9e0980 R11: 0000000000000246 R12: 00000000000001ed [ 58.542682][ T6730] R13: 00007ffd7a797f80 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.67' (ECDSA) to the list of known hosts. syzkaller login: [ 63.493372][ T4195] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:6/4195 [ 63.502769][ T4195] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.508675][ T4195] CPU: 0 PID: 4195 Comm: kworker/u4:6 Not tainted 5.8.0-rc1-syzkaller #0 [ 63.517087][ T4195] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.527149][ T4195] Workqueue: writeback wb_workfn (flush-8:0) [ 63.533125][ T4195] Call Trace: [ 63.536411][ T4195] dump_stack+0x18f/0x20d [ 63.540743][ T4195] check_preemption_disabled+0x20d/0x220 [ 63.546369][ T4195] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.551476][ T4195] ? ext4_find_extent+0x81a/0xad0 [ 63.556503][ T4195] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.561976][ T4195] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.567711][ T4195] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.572990][ T4195] ? ext4_ext_release+0x10/0x10 [ 63.577829][ T4195] ? down_write_killable+0x170/0x170 [ 63.583103][ T4195] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.588544][ T4195] ext4_map_blocks+0x4cb/0x1640 [ 63.593393][ T4195] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.598587][ T4195] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.604126][ T4195] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.610099][ T4195] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 63.615540][ T4195] ext4_writepages+0x1a7b/0x33c0 [ 63.620468][ T4195] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.626077][ T4195] ? __lock_acquire+0x2224/0x48b0 [ 63.631088][ T4195] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 63.637062][ T4195] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 63.643125][ T4195] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.648752][ T4195] ? do_writepages+0xfa/0x2a0 [ 63.653425][ T4195] do_writepages+0xfa/0x2a0 [ 63.657911][ T4195] ? page_writeback_cpu_online+0x10/0x10 [ 63.663877][ T4195] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.669414][ T4195] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.675370][ T4195] ? lock_downgrade+0x840/0x840 [ 63.680217][ T4195] __writeback_single_inode+0x12a/0x13d0 [ 63.685844][ T4195] ? _raw_spin_unlock+0x24/0x40 [ 63.690686][ T4195] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 63.696645][ T4195] writeback_sb_inodes+0x515/0xdc0 [ 63.701917][ T4195] ? __writeback_single_inode+0x13d0/0x13d0 [ 63.707801][ T4195] __writeback_inodes_wb+0xc3/0x250 [ 63.713008][ T4195] wb_writeback+0x8db/0xd50 [ 63.717509][ T4195] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 63.723822][ T4195] ? cpumask_next+0x3c/0x40 [ 63.728314][ T4195] ? get_nr_dirty_inodes+0xd6/0x130 [ 63.733513][ T4195] wb_workfn+0x9bc/0x1090 [ 63.737826][ T4195] ? inode_wait_for_writeback+0x30/0x30 [ 63.743353][ T4195] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.748877][ T4195] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.754838][ T4195] process_one_work+0x965/0x1690 [ 63.759773][ T4195] ? lock_release+0x800/0x800 [ 63.764428][ T4195] ? pwq_dec_nr_in_flight+0x310/0x310 [ 63.769779][ T4195] ? rwlock_bug.part.0+0x90/0x90 [ 63.774699][ T4195] worker_thread+0x96/0xe10 [ 63.779202][ T4195] ? process_one_work+0x1690/0x1690 [ 63.784391][ T4195] kthread+0x3b5/0x4a0 [ 63.788437][ T4195] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.794148][ T4195] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.799862][ T4195] ret_from_fork+0x1f/0x30 [ 63.864041][ T4195] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:6/4195 [ 63.873722][ T4195] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.879635][ T4195] CPU: 0 PID: 4195 Comm: kworker/u4:6 Not tainted 5.8.0-rc1-syzkaller #0 [ 63.888049][ T4195] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.898122][ T4195] Workqueue: writeback wb_workfn (flush-8:0) [ 63.904112][ T4195] Call Trace: [ 63.907414][ T4195] dump_stack+0x18f/0x20d [ 63.911762][ T4195] check_preemption_disabled+0x20d/0x220 [ 63.917441][ T4195] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.922572][ T4195] ? ext4_find_extent+0x81a/0xad0 [ 63.927623][ T4195] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.933097][ T4195] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.938846][ T4195] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.944177][ T4195] ? ext4_ext_release+0x10/0x10 [ 63.949058][ T4195] ? down_write_killable+0x170/0x170 [ 63.954358][ T4195] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.959852][ T4195] ext4_map_blocks+0x4cb/0x1640 [ 63.964713][ T4195] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.970017][ T4195] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.975592][ T4195] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.981572][ T4195] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 63.987017][ T4195] ext4_writepages+0x1a7b/0x33c0 [ 63.991961][ T4195] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.997594][ T4195] ? __lock_acquire+0x2224/0x48b0 [ 64.002684][ T4195] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.008797][ T4195] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.014787][ T4195] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.020401][ T4195] ? do_writepages+0xfa/0x2a0 [ 64.025060][ T4195] do_writepages+0xfa/0x2a0 [ 64.029663][ T4195] ? page_writeback_cpu_online+0x10/0x10 [ 64.035300][ T4195] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.040851][ T4195] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.046811][ T4195] ? lock_downgrade+0x840/0x840 [ 64.051758][ T4195] __writeback_single_inode+0x12a/0x13d0 [ 64.057472][ T4195] ? _raw_spin_unlock+0x24/0x40 [ 64.062301][ T4195] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.068273][ T4195] writeback_sb_inodes+0x515/0xdc0 [ 64.073372][ T4195] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.079278][ T4195] __writeback_inodes_wb+0xc3/0x250 [ 64.084476][ T4195] wb_writeback+0x8db/0xd50 [ 64.088981][ T4195] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.095310][ T4195] ? cpumask_next+0x3c/0x40 [ 64.099792][ T4195] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.105341][ T4195] wb_workfn+0x9bc/0x1090 [ 64.109675][ T4195] ? inode_wait_for_writeback+0x30/0x30 [ 64.115205][ T4195] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.120743][ T4195] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.126794][ T4195] process_one_work+0x965/0x1690 [ 64.131826][ T4195] ? lock_release+0x800/0x800 [ 64.136502][ T4195] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.141871][ T4195] ? rwlock_bug.part.0+0x90/0x90 [ 64.146794][ T4195] worker_thread+0x96/0xe10 [ 64.151284][ T4195] ? process_one_work+0x1690/0x1690 [ 64.156482][ T4195] kthread+0x3b5/0x4a0 [ 64.160721][ T4195] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.166425][ T4195] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.172126][ T4195] ret_from_fork+0x1f/0x30 [ 64.180737][ T4195] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:6/4195 [ 64.190042][ T4195] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.196058][ T4195] CPU: 0 PID: 4195 Comm: kworker/u4:6 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.204475][ T4195] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.214631][ T4195] Workqueue: writeback wb_workfn (flush-8:0) [ 64.220635][ T4195] Call Trace: [ 64.223940][ T4195] dump_stack+0x18f/0x20d [ 64.228284][ T4195] check_preemption_disabled+0x20d/0x220 [ 64.233958][ T4195] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.239102][ T4195] ? ext4_find_extent+0x81a/0xad0 [ 64.244147][ T4195] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.249612][ T4195] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.255353][ T4195] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.260659][ T4195] ? ext4_ext_release+0x10/0x10 [ 64.265535][ T4195] ? down_write_killable+0x170/0x170 [ 64.270822][ T4195] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.276296][ T4195] ext4_map_blocks+0x4cb/0x1640 [ 64.281191][ T4195] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.286402][ T4195] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.292931][ T4195] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.298949][ T4195] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.305809][ T4195] ext4_writepages+0x1a7b/0x33c0 [ 64.311234][ T4195] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.322260][ T4195] ? __lock_acquire+0x2224/0x48b0 [ 64.327330][ T4195] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.333329][ T4195] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.339326][ T4195] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.344972][ T4195] ? do_writepages+0xfa/0x2a0 [ 64.349656][ T4195] do_writepages+0xfa/0x2a0 [ 64.354193][ T4195] ? page_writeback_cpu_online+0x10/0x10 [ 64.359834][ T4195] ? rcu_read_lock_sched_held+0x9c/0xd0 2020/06/16 05:42:12 fuzzer started [ 64.365387][ T4195] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.371507][ T4195] ? lock_downgrade+0x840/0x840 [ 64.376373][ T4195] __writeback_single_inode+0x12a/0x13d0 [ 64.382154][ T4195] ? _raw_spin_unlock+0x24/0x40 [ 64.387014][ T4195] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.393010][ T4195] writeback_sb_inodes+0x515/0xdc0 [ 64.398144][ T4195] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.404072][ T4195] __writeback_inodes_wb+0xc3/0x250 [ 64.409289][ T4195] wb_writeback+0x8db/0xd50 [ 64.413810][ T4195] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.420160][ T4195] ? cpumask_next+0x3c/0x40 [ 64.424676][ T4195] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.429896][ T4195] wb_workfn+0x9bc/0x1090 [ 64.434251][ T4195] ? inode_wait_for_writeback+0x30/0x30 [ 64.439825][ T4195] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.445480][ T4195] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.451616][ T4195] process_one_work+0x965/0x1690 [ 64.456587][ T4195] ? lock_release+0x800/0x800 [ 64.461291][ T4195] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.466682][ T4195] ? rwlock_bug.part.0+0x90/0x90 [ 64.471645][ T4195] worker_thread+0x96/0xe10 [ 64.476179][ T4195] ? process_one_work+0x1690/0x1690 [ 64.481652][ T4195] kthread+0x3b5/0x4a0 [ 64.485757][ T4195] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.491494][ T4195] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.497231][ T4195] ret_from_fork+0x1f/0x30 2020/06/16 05:42:12 connecting to host at 10.128.0.26:41617 2020/06/16 05:42:12 checking machine... 2020/06/16 05:42:12 checking revisions... 2020/06/16 05:42:12 testing simple program... [ 64.858019][ T1154] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1154 [ 64.867344][ T1154] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.873460][ T1154] CPU: 0 PID: 1154 Comm: khugepaged Not tainted 5.8.0-rc1-syzkaller #0 [ 64.881702][ T1154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.891760][ T1154] Call Trace: [ 64.895075][ T1154] dump_stack+0x18f/0x20d [ 64.899420][ T1154] check_preemption_disabled+0x20d/0x220 [ 64.905065][ T1154] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.910211][ T1154] ? ext4_find_extent+0x81a/0xad0 [ 64.915273][ T1154] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.920829][ T1154] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.926569][ T1154] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.931873][ T1154] ? ext4_ext_release+0x10/0x10 [ 64.936766][ T1154] ? down_write_killable+0x170/0x170 [ 64.942242][ T1154] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.947720][ T1154] ext4_map_blocks+0x4cb/0x1640 [ 64.952635][ T1154] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.957852][ T1154] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.963421][ T1154] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.969409][ T1154] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.974980][ T1154] ext4_writepages+0x1a7b/0x33c0 [ 64.979929][ T1154] ? lock_release+0x7f0/0x800 [ 64.984626][ T1154] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.990302][ T1154] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.995942][ T1154] ? do_writepages+0xfa/0x2a0 [ 65.000632][ T1154] do_writepages+0xfa/0x2a0 [ 65.005156][ T1154] ? page_writeback_cpu_online+0x10/0x10 [ 65.010797][ T1154] ? do_raw_spin_lock+0x120/0x2d0 [ 65.015831][ T1154] ? do_raw_spin_unlock+0x171/0x260 [ 65.021123][ T1154] ? _raw_spin_unlock+0x24/0x40 [ 65.026172][ T1154] __filemap_fdatawrite_range+0x2aa/0x390 [ 65.029797][ T6808] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6808 [ 65.031898][ T1154] ? collapse_file+0x35a2/0x4330 [ 65.031931][ T1154] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 65.031958][ T1154] ? _raw_spin_unlock_irq+0x1f/0x80 [ 65.041390][ T6808] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.046287][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.069428][ T1154] collapse_file+0x35ac/0x4330 [ 65.074197][ T1154] ? collapse_huge_page+0x4350/0x4350 [ 65.079576][ T1154] ? khugepaged+0x2506/0x3fc0 [ 65.084261][ T1154] ? xas_find+0x31a/0x880 [ 65.088579][ T1154] ? check_preemption_disabled+0x38/0x220 [ 65.094295][ T1154] khugepaged+0x3041/0x3fc0 [ 65.098823][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 65.104443][ T1154] ? lock_downgrade+0x840/0x840 [ 65.109294][ T1154] ? finish_wait+0x260/0x260 [ 65.113877][ T1154] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 65.119668][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.125637][ T1154] ? __kthread_parkme+0x13f/0x1e0 [ 65.130649][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 65.136285][ T1154] kthread+0x3b5/0x4a0 [ 65.140355][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.146057][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.151767][ T1154] ret_from_fork+0x1f/0x30 [ 65.156185][ T6808] CPU: 1 PID: 6808 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 65.164438][ T6808] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.174497][ T6808] Call Trace: [ 65.177796][ T6808] dump_stack+0x18f/0x20d [ 65.182180][ T6808] check_preemption_disabled+0x20d/0x220 [ 65.187840][ T6808] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.192976][ T6808] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.198558][ T6808] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.204290][ T6808] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.209592][ T6808] ? ext4_ext_release+0x10/0x10 [ 65.209931][ T1154] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1154 [ 65.214471][ T6808] ? down_write_killable+0x170/0x170 [ 65.214486][ T6808] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.214508][ T6808] ext4_map_blocks+0x4cb/0x1640 [ 65.214530][ T6808] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.214545][ T6808] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.214565][ T6808] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.223628][ T1154] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.228857][ T6808] ? prandom_u32_state+0xe/0x170 [ 65.267674][ T6808] ? __brelse+0x84/0xa0 [ 65.271827][ T6808] ? __ext4_new_inode+0x144/0x55e0 [ 65.276950][ T6808] ext4_getblk+0xad/0x520 [ 65.281973][ T6808] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.287693][ T6808] ? ext4_free_inode+0x1700/0x1700 [ 65.292794][ T6808] ext4_bread+0x7c/0x380 [ 65.297020][ T6808] ? ext4_getblk+0x520/0x520 [ 65.301595][ T6808] ? dquot_get_next_dqblk+0x180/0x180 [ 65.306956][ T6808] ext4_append+0x153/0x360 [ 65.311361][ T6808] ext4_mkdir+0x5e0/0xdf0 [ 65.315727][ T6808] ? ext4_rmdir+0xde0/0xde0 [ 65.320220][ T6808] ? security_inode_permission+0xc4/0xf0 [ 65.326103][ T6808] vfs_mkdir+0x419/0x690 [ 65.330332][ T6808] do_mkdirat+0x21e/0x280 [ 65.334649][ T6808] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.339486][ T6808] ? do_syscall_64+0x1c/0xe0 [ 65.344063][ T6808] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.350117][ T6808] do_syscall_64+0x60/0xe0 [ 65.354522][ T6808] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.360406][ T6808] RIP: 0033:0x4b02a0 [ 65.364277][ T6808] Code: Bad RIP value. [ 65.368321][ T6808] RSP: 002b:000000c0000e14b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 65.376717][ T6808] RAX: ffffffffffffffda RBX: 000000c00002e500 RCX: 00000000004b02a0 [ 65.384770][ T6808] RDX: 00000000000001c0 RSI: 000000c0000a8960 RDI: ffffffffffffff9c [ 65.392727][ T6808] RBP: 000000c0000e1510 R08: 0000000000000000 R09: 0000000000000000 [ 65.400698][ T6808] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 65.408655][ T6808] R13: 000000000000004c R14: 000000000000004b R15: 0000000000000100 [ 65.416631][ T1154] CPU: 0 PID: 1154 Comm: khugepaged Not tainted 5.8.0-rc1-syzkaller #0 [ 65.424878][ T1154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.434936][ T1154] Call Trace: [ 65.438242][ T1154] dump_stack+0x18f/0x20d [ 65.442686][ T1154] check_preemption_disabled+0x20d/0x220 [ 65.448443][ T1154] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.453695][ T1154] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.459153][ T1154] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 65.465304][ T1154] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.470579][ T1154] ? ext4_ext_release+0x10/0x10 [ 65.475422][ T1154] ? down_write_killable+0x170/0x170 [ 65.480687][ T1154] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.486128][ T1154] ext4_map_blocks+0x4cb/0x1640 [ 65.490960][ T1154] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.496152][ T1154] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.501699][ T1154] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.507672][ T1154] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 65.513125][ T1154] ext4_writepages+0x1a7b/0x33c0 [ 65.518041][ T1154] ? lock_release+0x7f0/0x800 [ 65.522705][ T1154] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.528342][ T1154] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.533953][ T1154] ? do_writepages+0xfa/0x2a0 [ 65.538605][ T1154] do_writepages+0xfa/0x2a0 [ 65.543092][ T1154] ? page_writeback_cpu_online+0x10/0x10 [ 65.548773][ T1154] ? do_raw_spin_lock+0x120/0x2d0 [ 65.553795][ T1154] ? do_raw_spin_unlock+0x171/0x260 [ 65.558984][ T1154] ? _raw_spin_unlock+0x24/0x40 [ 65.563820][ T1154] __filemap_fdatawrite_range+0x2aa/0x390 [ 65.569519][ T1154] ? collapse_file+0x35a2/0x4330 [ 65.574436][ T1154] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 65.580501][ T1154] ? _raw_spin_unlock_irq+0x1f/0x80 [ 65.585678][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.591641][ T1154] collapse_file+0x35ac/0x4330 [ 65.596413][ T1154] ? collapse_huge_page+0x4350/0x4350 [ 65.601767][ T1154] ? khugepaged+0x2506/0x3fc0 [ 65.606450][ T1154] ? xas_find+0x31a/0x880 [ 65.610757][ T1154] ? check_preemption_disabled+0x38/0x220 [ 65.616460][ T1154] khugepaged+0x3041/0x3fc0 [ 65.620957][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 65.626582][ T1154] ? lock_downgrade+0x840/0x840 [ 65.631411][ T1154] ? finish_wait+0x260/0x260 [ 65.635992][ T1154] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 65.641792][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.647754][ T1154] ? __kthread_parkme+0x13f/0x1e0 [ 65.652758][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 65.658382][ T1154] kthread+0x3b5/0x4a0 [ 65.662444][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.668140][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.673838][ T1154] ret_from_fork+0x1f/0x30 [ 65.701643][ T6823] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6823 [ 65.707160][ T1154] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1154 [ 65.711365][ T6823] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.711384][ T6823] CPU: 1 PID: 6823 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.711393][ T6823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.711403][ T6823] Call Trace: [ 65.711431][ T6823] dump_stack+0x18f/0x20d [ 65.711457][ T6823] check_preemption_disabled+0x20d/0x220 [ 65.711474][ T6823] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.711505][ T6823] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.711522][ T6823] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.711548][ T6823] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.711577][ T6823] ? ext4_ext_release+0x10/0x10 [ 65.711613][ T6823] ? down_write_killable+0x170/0x170 [ 65.711628][ T6823] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.711653][ T6823] ext4_map_blocks+0x4cb/0x1640 [ 65.711677][ T6823] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.711693][ T6823] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.711711][ T6823] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.711731][ T6823] ? prandom_u32_state+0xe/0x170 [ 65.711750][ T6823] ? __brelse+0x84/0xa0 [ 65.711767][ T6823] ? __ext4_new_inode+0x144/0x55e0 [ 65.711794][ T6823] ext4_getblk+0xad/0x520 [ 65.711812][ T6823] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.711840][ T6823] ? ext4_free_inode+0x1700/0x1700 [ 65.711865][ T6823] ext4_bread+0x7c/0x380 [ 65.711886][ T6823] ? ext4_getblk+0x520/0x520 [ 65.711906][ T6823] ? dquot_get_next_dqblk+0x180/0x180 [ 65.711935][ T6823] ext4_append+0x153/0x360 [ 65.711957][ T6823] ext4_mkdir+0x5e0/0xdf0 [ 65.711986][ T6823] ? ext4_rmdir+0xde0/0xde0 [ 65.712007][ T6823] ? security_inode_permission+0xc4/0xf0 [ 65.712031][ T6823] vfs_mkdir+0x419/0x690 [ 65.712056][ T6823] do_mkdirat+0x21e/0x280 [ 65.712076][ T6823] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.712092][ T6823] ? do_syscall_64+0x1c/0xe0 [ 65.712110][ T6823] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.712130][ T6823] do_syscall_64+0x60/0xe0 [ 65.712153][ T6823] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.712166][ T6823] RIP: 0033:0x45bed7 [ 65.712173][ T6823] Code: Bad RIP value. [ 65.712182][ T6823] RSP: 002b:00007fff03c66ba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 65.712200][ T6823] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 65.712209][ T6823] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007fff03c66d80 [ 65.712218][ T6823] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003a00 [ 65.712227][ T6823] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 65.712237][ T6823] R13: 00007fff03c66d80 R14: 8421084210842109 R15: 00007fff03c66d8c [ 65.840833][ T6824] IPVS: ftp: loaded support on port[0] = 21 [ 65.843111][ T1154] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.843129][ T1154] CPU: 0 PID: 1154 Comm: khugepaged Not tainted 5.8.0-rc1-syzkaller #0 [ 65.843138][ T1154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.843149][ T1154] Call Trace: [ 65.892749][ T6824] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6824 [ 65.894850][ T1154] dump_stack+0x18f/0x20d [ 65.899425][ T6824] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.905383][ T1154] check_preemption_disabled+0x20d/0x220 [ 65.905399][ T1154] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.905427][ T1154] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.905448][ T1154] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 65.905472][ T1154] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.054894][ T1154] ? ext4_ext_release+0x10/0x10 [ 66.059781][ T1154] ? down_write_killable+0x170/0x170 [ 66.065143][ T1154] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.070595][ T1154] ext4_map_blocks+0x4cb/0x1640 [ 66.075439][ T1154] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.080629][ T1154] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.086162][ T1154] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.092127][ T1154] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 66.097661][ T1154] ext4_writepages+0x1a7b/0x33c0 [ 66.102637][ T1154] ? lock_release+0x7f0/0x800 [ 66.107312][ T1154] ? __ext4_mark_inode_dirty+0x940/0x940 [ 66.112952][ T1154] ? __ext4_mark_inode_dirty+0x940/0x940 [ 66.118570][ T1154] ? do_writepages+0xfa/0x2a0 [ 66.123231][ T1154] do_writepages+0xfa/0x2a0 [ 66.127749][ T1154] ? page_writeback_cpu_online+0x10/0x10 [ 66.133369][ T1154] ? do_raw_spin_lock+0x120/0x2d0 [ 66.138484][ T1154] ? do_raw_spin_unlock+0x171/0x260 [ 66.143688][ T1154] ? _raw_spin_unlock+0x24/0x40 [ 66.148529][ T1154] __filemap_fdatawrite_range+0x2aa/0x390 [ 66.154324][ T1154] ? collapse_file+0x35a2/0x4330 [ 66.159261][ T1154] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 66.165681][ T1154] ? _raw_spin_unlock_irq+0x1f/0x80 [ 66.170867][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.176843][ T1154] collapse_file+0x35ac/0x4330 [ 66.181606][ T1154] ? collapse_huge_page+0x4350/0x4350 [ 66.186970][ T1154] ? khugepaged+0x2506/0x3fc0 [ 66.191640][ T1154] ? xas_find+0x31a/0x880 [ 66.195959][ T1154] ? check_preemption_disabled+0x38/0x220 [ 66.201692][ T1154] khugepaged+0x3041/0x3fc0 [ 66.206201][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 66.211931][ T1154] ? lock_downgrade+0x840/0x840 [ 66.216784][ T1154] ? finish_wait+0x260/0x260 [ 66.221371][ T1154] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 66.227162][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.233132][ T1154] ? __kthread_parkme+0x13f/0x1e0 [ 66.238142][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 66.243760][ T1154] kthread+0x3b5/0x4a0 [ 66.247814][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.253525][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.259232][ T1154] ret_from_fork+0x1f/0x30 [ 66.263652][ T6824] CPU: 1 PID: 6824 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.272258][ T6824] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.282315][ T6824] Call Trace: [ 66.285650][ T6824] dump_stack+0x18f/0x20d [ 66.289993][ T6824] check_preemption_disabled+0x20d/0x220 [ 66.295629][ T6824] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.300761][ T6824] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.306236][ T6824] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.311975][ T6824] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.317370][ T6824] ? ext4_ext_release+0x10/0x10 [ 66.322445][ T6824] ? down_write_killable+0x170/0x170 [ 66.327827][ T6824] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.334045][ T6824] ext4_map_blocks+0x4cb/0x1640 [ 66.338909][ T6824] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.344291][ T6824] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.350310][ T6824] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.356483][ T6824] ? prandom_u32_state+0xe/0x170 [ 66.361416][ T6824] ? __brelse+0x84/0xa0 [ 66.365569][ T6824] ? __ext4_new_inode+0x144/0x55e0 [ 66.370672][ T6824] ext4_getblk+0xad/0x520 [ 66.375085][ T6824] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.380793][ T6824] ? ext4_free_inode+0x1700/0x1700 [ 66.385983][ T6824] ext4_bread+0x7c/0x380 [ 66.390225][ T6824] ? ext4_getblk+0x520/0x520 [ 66.394800][ T6824] ? dquot_get_next_dqblk+0x180/0x180 [ 66.400174][ T6824] ext4_append+0x153/0x360 [ 66.404573][ T6824] ext4_mkdir+0x5e0/0xdf0 [ 66.408889][ T6824] ? ext4_rmdir+0xde0/0xde0 [ 66.413385][ T6824] ? security_inode_permission+0xc4/0xf0 [ 66.419020][ T6824] vfs_mkdir+0x419/0x690 [ 66.423246][ T6824] do_mkdirat+0x21e/0x280 [ 66.427555][ T6824] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.432388][ T6824] ? do_syscall_64+0x1c/0xe0 [ 66.437068][ T6824] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.443126][ T6824] do_syscall_64+0x60/0xe0 [ 66.447532][ T6824] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.453434][ T6824] RIP: 0033:0x45bed7 [ 66.457308][ T6824] Code: Bad RIP value. [ 66.461379][ T6824] RSP: 002b:00007fff03c66a98 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 66.469795][ T6824] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 66.477862][ T6824] RDX: 00007fff03c66ae3 RSI: 00000000000001ff RDI: 00007fff03c66ae0 [ 66.485817][ T6824] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 66.493773][ T6824] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185c0 [ 66.501750][ T6824] R13: 00007fff03c66ad0 R14: 0000000000000000 R15: 00007fff03c66ae0 [ 66.576045][ T6824] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6824 [ 66.585746][ T6824] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.591863][ T6824] CPU: 0 PID: 6824 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.600444][ T6824] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.610500][ T6824] Call Trace: [ 66.613803][ T6824] dump_stack+0x18f/0x20d [ 66.618162][ T6824] check_preemption_disabled+0x20d/0x220 [ 66.623808][ T6824] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.629208][ T6824] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.634886][ T6824] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.640634][ T6824] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.645931][ T6824] ? ext4_ext_release+0x10/0x10 [ 66.650802][ T6824] ? down_write_killable+0x170/0x170 [ 66.656098][ T6824] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.661542][ T6824] ext4_map_blocks+0x4cb/0x1640 [ 66.666469][ T6824] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.671658][ T6824] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.677193][ T6824] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.683158][ T6824] ? prandom_u32_state+0xe/0x170 [ 66.688097][ T6824] ? __brelse+0x84/0xa0 [ 66.692250][ T6824] ? __ext4_new_inode+0x144/0x55e0 [ 66.697372][ T6824] ext4_getblk+0xad/0x520 [ 66.701703][ T6824] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.707448][ T6824] ? ext4_free_inode+0x1700/0x1700 [ 66.712551][ T6824] ext4_bread+0x7c/0x380 [ 66.716792][ T6824] ? ext4_getblk+0x520/0x520 [ 66.721376][ T6824] ? dquot_get_next_dqblk+0x180/0x180 [ 66.726859][ T6824] ext4_append+0x153/0x360 [ 66.731293][ T6824] ext4_mkdir+0x5e0/0xdf0 [ 66.735626][ T6824] ? ext4_rmdir+0xde0/0xde0 [ 66.740136][ T6824] ? security_inode_permission+0xc4/0xf0 [ 66.746072][ T6824] vfs_mkdir+0x419/0x690 [ 66.750337][ T6824] do_mkdirat+0x21e/0x280 [ 66.754657][ T6824] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.759497][ T6824] ? do_syscall_64+0x1c/0xe0 [ 66.764082][ T6824] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.770058][ T6824] do_syscall_64+0x60/0xe0 2020/06/16 05:42:14 building call list... [ 66.774472][ T6824] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.780355][ T6824] RIP: 0033:0x45bed7 [ 66.784248][ T6824] Code: Bad RIP value. [ 66.788295][ T6824] RSP: 002b:00007fff03c66a98 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 66.796684][ T6824] RAX: ffffffffffffffda RBX: 0000000000010407 RCX: 000000000045bed7 [ 66.805084][ T6824] RDX: 00007fff03c66ae3 RSI: 00000000000001ff RDI: 00007fff03c66ae0 [ 66.813304][ T6824] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 66.821276][ T6824] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 66.829551][ T6824] R13: 00007fff03c66ad0 R14: 00000000000103ed R15: 00007fff03c66ae0 [ 67.060985][ T4195] tipc: TX() has been purged, node left! [ 67.593347][ T4195] ================================================================== [ 67.601608][ T4195] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 67.609517][ T4195] Write of size 1 at addr ffff8880924611e4 by task kworker/u4:6/4195 [ 67.617564][ T4195] [ 67.619897][ T4195] CPU: 0 PID: 4195 Comm: kworker/u4:6 Not tainted 5.8.0-rc1-syzkaller #0 [ 67.628295][ T4195] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.638348][ T4195] Workqueue: netns cleanup_net [ 67.643105][ T4195] Call Trace: [ 67.646396][ T4195] dump_stack+0x18f/0x20d [ 67.650729][ T4195] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.656273][ T4195] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.665374][ T4195] ? afs_put_call+0xa40/0xa40 [ 67.670053][ T4195] print_address_description.constprop.0.cold+0xd3/0x413 [ 67.677079][ T4195] ? vprintk_func+0x97/0x1a6 [ 67.681676][ T4195] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.687218][ T4195] kasan_report.cold+0x1f/0x37 [ 67.691986][ T4195] ? rcu_read_lock_held_common+0x51/0xa0 [ 67.697632][ T4195] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.703181][ T4195] afs_wake_up_async_call+0x6aa/0x770 [ 67.708557][ T4195] ? afs_close_socket+0x320/0x320 [ 67.713580][ T4195] ? afs_put_call+0xa40/0xa40 [ 67.718270][ T4195] rxrpc_notify_socket+0x1db/0x5d0 [ 67.723384][ T4195] ? afs_put_call+0xa40/0xa40 [ 67.728061][ T4195] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 67.734476][ T4195] rxrpc_call_completed+0xca/0xf0 [ 67.739511][ T4195] rxrpc_discard_prealloc+0x781/0xab0 [ 67.744883][ T4195] ? lock_sock_nested+0x94/0x110 [ 67.749822][ T4195] rxrpc_listen+0x147/0x360 [ 67.754326][ T4195] afs_close_socket+0x95/0x320 [ 67.759088][ T4195] ? afs_purge_servers+0x16d/0x300 [ 67.764198][ T4195] ? afs_rx_discard_new_call+0x50/0x50 [ 67.769670][ T4195] ? init_wait_var_entry+0x200/0x200 [ 67.774958][ T4195] ? rcu_read_lock_held_common+0xa0/0xa0 [ 67.780610][ T4195] ? check_preemption_disabled+0x38/0x220 [ 67.786333][ T4195] afs_net_exit+0x1bc/0x310 [ 67.790833][ T4195] ? afs_net_init+0xe30/0xe30 [ 67.795532][ T4195] ops_exit_list.isra.0+0xa8/0x150 [ 67.800645][ T4195] cleanup_net+0x511/0xa50 [ 67.805063][ T4195] ? unregister_pernet_device+0x70/0x70 [ 67.810634][ T4195] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.816619][ T4195] process_one_work+0x965/0x1690 [ 67.821565][ T4195] ? lock_release+0x800/0x800 [ 67.826240][ T4195] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.831612][ T4195] ? rwlock_bug.part.0+0x90/0x90 [ 67.836560][ T4195] worker_thread+0x96/0xe10 [ 67.841076][ T4195] ? process_one_work+0x1690/0x1690 [ 67.846273][ T4195] kthread+0x3b5/0x4a0 [ 67.850341][ T4195] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.856058][ T4195] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.861806][ T4195] ret_from_fork+0x1f/0x30 [ 67.866242][ T4195] [ 67.868575][ T4195] Allocated by task 6824: [ 67.872915][ T4195] save_stack+0x1b/0x40 [ 67.877108][ T4195] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 67.882745][ T4195] kmem_cache_alloc_trace+0x153/0x7d0 [ 67.888559][ T4195] afs_alloc_call+0x55/0x630 [ 67.893149][ T4195] afs_charge_preallocation+0xe9/0x2d0 [ 67.898607][ T4195] afs_open_socket+0x292/0x360 [ 67.903382][ T4195] afs_net_init+0xa6c/0xe30 [ 67.907899][ T4195] ops_init+0xaf/0x420 [ 67.911962][ T4195] setup_net+0x2de/0x860 [ 67.916206][ T4195] copy_net_ns+0x293/0x590 [ 67.920728][ T4195] create_new_namespaces+0x3fb/0xb30 [ 67.926035][ T4195] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 67.931693][ T4195] ksys_unshare+0x43d/0x8e0 [ 67.936250][ T4195] __x64_sys_unshare+0x2d/0x40 [ 67.941029][ T4195] do_syscall_64+0x60/0xe0 [ 67.945462][ T4195] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.951531][ T4195] [ 67.953901][ T4195] Freed by task 4195: [ 67.959099][ T4195] save_stack+0x1b/0x40 [ 67.963260][ T4195] __kasan_slab_free+0xf7/0x140 [ 67.968225][ T4195] kfree+0x109/0x2b0 [ 67.972127][ T4195] afs_put_call+0x585/0xa40 [ 67.976642][ T4195] rxrpc_discard_prealloc+0x764/0xab0 [ 67.982019][ T4195] rxrpc_listen+0x147/0x360 [ 67.986521][ T4195] afs_close_socket+0x95/0x320 [ 67.991288][ T4195] afs_net_exit+0x1bc/0x310 [ 67.995904][ T4195] ops_exit_list.isra.0+0xa8/0x150 [ 68.001011][ T4195] cleanup_net+0x511/0xa50 [ 68.005423][ T4195] process_one_work+0x965/0x1690 [ 68.010362][ T4195] worker_thread+0x96/0xe10 [ 68.014876][ T4195] kthread+0x3b5/0x4a0 [ 68.018950][ T4195] ret_from_fork+0x1f/0x30 [ 68.023356][ T4195] [ 68.025685][ T4195] The buggy address belongs to the object at ffff888092461000 [ 68.025685][ T4195] which belongs to the cache kmalloc-1k of size 1024 [ 68.039786][ T4195] The buggy address is located 484 bytes inside of [ 68.039786][ T4195] 1024-byte region [ffff888092461000, ffff888092461400) [ 68.053198][ T4195] The buggy address belongs to the page: [ 68.058949][ T4195] page:ffffea0002491840 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 68.068143][ T4195] flags: 0xfffe0000000200(slab) [ 68.073000][ T4195] raw: 00fffe0000000200 ffffea00027ec148 ffffea00025d0948 ffff8880aa000c40 [ 68.081703][ T4195] raw: 0000000000000000 ffff888092461000 0000000100000002 0000000000000000 [ 68.091149][ T4195] page dumped because: kasan: bad access detected [ 68.097546][ T4195] [ 68.099892][ T4195] Memory state around the buggy address: [ 68.105514][ T4195] ffff888092461080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.113567][ T4195] ffff888092461100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.121638][ T4195] >ffff888092461180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.129698][ T4195] ^ [ 68.136907][ T4195] ffff888092461200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program [ 68.144962][ T4195] ffff888092461280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.153008][ T4195] ================================================================== [ 68.161068][ T4195] Disabling lock debugging due to kernel taint [ 68.167273][ T4195] Kernel panic - not syncing: panic_on_warn set ... [ 68.173867][ T4195] CPU: 0 PID: 4195 Comm: kworker/u4:6 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 68.183656][ T4195] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.193712][ T4195] Workqueue: netns cleanup_net [ 68.198466][ T4195] Call Trace: [ 68.201756][ T4195] dump_stack+0x18f/0x20d [ 68.206081][ T4195] ? afs_wake_up_async_call+0x670/0x770 [ 68.211625][ T4195] ? afs_put_call+0xa40/0xa40 [ 68.216304][ T4195] panic+0x2e3/0x75c [ 68.220193][ T4195] ? __warn_printk+0xf3/0xf3 [ 68.224776][ T4195] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 68.230945][ T4195] ? trace_hardirqs_on+0x55/0x220 [ 68.236050][ T4195] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.241585][ T4195] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.247118][ T4195] ? afs_put_call+0xa40/0xa40 [ 68.251801][ T4195] end_report+0x4d/0x53 [ 68.255966][ T4195] kasan_report.cold+0xd/0x37 [ 68.260650][ T4195] ? rcu_read_lock_held_common+0x51/0xa0 [ 68.266270][ T4195] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.271806][ T4195] afs_wake_up_async_call+0x6aa/0x770 [ 68.277180][ T4195] ? afs_close_socket+0x320/0x320 [ 68.282202][ T4195] ? afs_put_call+0xa40/0xa40 [ 68.286955][ T4195] rxrpc_notify_socket+0x1db/0x5d0 [ 68.292059][ T4195] ? afs_put_call+0xa40/0xa40 [ 68.296728][ T4195] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 68.303134][ T4195] rxrpc_call_completed+0xca/0xf0 [ 68.308258][ T4195] rxrpc_discard_prealloc+0x781/0xab0 [ 68.313627][ T4195] ? lock_sock_nested+0x94/0x110 [ 68.318560][ T4195] rxrpc_listen+0x147/0x360 [ 68.323054][ T4195] afs_close_socket+0x95/0x320 [ 68.327808][ T4195] ? afs_purge_servers+0x16d/0x300 [ 68.332930][ T4195] ? afs_rx_discard_new_call+0x50/0x50 [ 68.338378][ T4195] ? init_wait_var_entry+0x200/0x200 [ 68.343671][ T4195] ? rcu_read_lock_held_common+0xa0/0xa0 [ 68.349296][ T4195] ? check_preemption_disabled+0x38/0x220 [ 68.355006][ T4195] afs_net_exit+0x1bc/0x310 [ 68.359504][ T4195] ? afs_net_init+0xe30/0xe30 [ 68.364172][ T4195] ops_exit_list.isra.0+0xa8/0x150 [ 68.369273][ T4195] cleanup_net+0x511/0xa50 [ 68.373680][ T4195] ? unregister_pernet_device+0x70/0x70 [ 68.379221][ T4195] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.385216][ T4195] process_one_work+0x965/0x1690 [ 68.390152][ T4195] ? lock_release+0x800/0x800 [ 68.394838][ T4195] ? pwq_dec_nr_in_flight+0x310/0x310 [ 68.400202][ T4195] ? rwlock_bug.part.0+0x90/0x90 [ 68.405132][ T4195] worker_thread+0x96/0xe10 [ 68.409633][ T4195] ? process_one_work+0x1690/0x1690 [ 68.414993][ T4195] kthread+0x3b5/0x4a0 [ 68.419054][ T4195] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.424762][ T4195] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.430484][ T4195] ret_from_fork+0x1f/0x30 [ 68.436313][ T4195] Kernel Offset: disabled [ 68.440640][ T4195] Rebooting in 86400 seconds..