Starting Load/Save RF Kill Switch Status... [ 53.660784][ T6726] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6726 [ 53.672415][ T6726] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 53.678960][ T6726] CPU: 1 PID: 6726 Comm: systemd-rfkill Not tainted 5.7.0-syzkaller #0 [ 53.687847][ T6726] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.700110][ T6726] Call Trace: [ 53.704246][ T6726] dump_stack+0x18f/0x20d [ 53.708580][ T6726] check_preemption_disabled+0x20d/0x220 [ 53.714478][ T6726] ext4_mb_new_blocks+0xa4d/0x3b70 [ 53.720200][ T6726] ? ext4_ext_search_right+0x2ca/0xb20 [ 53.725980][ T6726] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 53.731857][ T6726] ext4_ext_map_blocks+0x201b/0x33e0 [ 53.738078][ T6726] ? ext4_ext_release+0x10/0x10 [ 53.743146][ T6726] ? down_write_killable+0x170/0x170 [ 53.748706][ T6726] ? ext4_es_lookup_extent+0x41d/0xd10 [ 53.754989][ T6726] ext4_map_blocks+0x4cb/0x1640 [ 53.760576][ T6726] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 53.766519][ T6726] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 53.774852][ T6726] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 53.781568][ T6726] ? prandom_u32_state+0xe/0x170 [ 53.786815][ T6726] ? __brelse+0x84/0xa0 [ 53.791216][ T6726] ? __ext4_new_inode+0x144/0x55e0 [ 53.796334][ T6726] ext4_getblk+0xad/0x520 [ 53.800962][ T6726] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 53.806706][ T6726] ? ext4_free_inode+0x1700/0x1700 [ 53.811809][ T6726] ext4_bread+0x7c/0x380 [ 53.816235][ T6726] ? ext4_getblk+0x520/0x520 [ 53.821747][ T6726] ? dquot_get_next_dqblk+0x180/0x180 [ 53.827975][ T6726] ext4_append+0x153/0x360 [ 53.832766][ T6726] ext4_mkdir+0x5e0/0xdf0 [ 53.837635][ T6726] ? ext4_rmdir+0xde0/0xde0 [ 53.842419][ T6726] ? security_inode_permission+0xc4/0xf0 [ 53.848694][ T6726] vfs_mkdir+0x419/0x690 [ 53.852944][ T6726] do_mkdirat+0x21e/0x280 [ 53.857388][ T6726] ? __ia32_sys_mknod+0xb0/0xb0 [ 53.862444][ T6726] ? do_syscall_64+0x1c/0xe0 [ 53.867431][ T6726] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 53.874325][ T6726] do_syscall_64+0x60/0xe0 [ 53.879024][ T6726] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.885009][ T6726] RIP: 0033:0x7f032328e687 [ 53.889421][ T6726] Code: Bad RIP value. [ 53.893867][ T6726] RSP: 002b:00007ffd06162968 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 53.902732][ T6726] RAX: ffffffffffffffda RBX: 0000564ee25dd985 RCX: 00007f032328e687 [ 53.911194][ T6726] RDX: 00007ffd06162830 RSI: 00000000000001ed RDI: 0000564ee25dd985 [ 53.919467][ T6726] RBP: 00007f032328e680 R08: 0000000000000100 R09: 0000000000000000 [ 53.927885][ T6726] R10: 0000564ee25dd980 R11: 0000000000000246 R12: 00000000000001ed [ 53.936153][ T6726] R13: 00007ffd06162af0 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 56.792317][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 56.802570][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 56.808512][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 56.816328][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.826851][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 56.832818][ T7] Call Trace: [ 56.836189][ T7] dump_stack+0x18f/0x20d [ 56.840508][ T7] check_preemption_disabled+0x20d/0x220 [ 56.846423][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 56.852102][ T7] ? ext4_find_extent+0x81a/0xad0 [ 56.857238][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 56.862688][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 56.868636][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 56.873986][ T7] ? ext4_ext_release+0x10/0x10 [ 56.879013][ T7] ? down_write_killable+0x170/0x170 [ 56.884467][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 56.891279][ T7] ext4_map_blocks+0x4cb/0x1640 [ 56.896149][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 56.901805][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.907596][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.913869][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 56.919884][ T7] ext4_writepages+0x1a7b/0x33c0 [ 56.925100][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 56.930971][ T7] ? __lock_acquire+0x2224/0x48b0 [ 56.936221][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 56.942208][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 56.948290][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 56.954297][ T7] ? do_writepages+0xfa/0x2a0 [ 56.959322][ T7] do_writepages+0xfa/0x2a0 [ 56.964094][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 56.969726][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.975259][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.981439][ T7] ? lock_downgrade+0x840/0x840 [ 56.986290][ T7] __writeback_single_inode+0x12a/0x13d0 [ 56.992120][ T7] ? _raw_spin_unlock+0x24/0x40 [ 56.996960][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 57.003103][ T7] writeback_sb_inodes+0x515/0xdc0 [ 57.008266][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 57.014171][ T7] __writeback_inodes_wb+0xc3/0x250 [ 57.019647][ T7] wb_writeback+0x8db/0xd50 [ 57.024684][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 57.031464][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 57.037728][ T7] ? cpumask_next+0x3c/0x40 [ 57.042309][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 57.048028][ T7] wb_workfn+0xab3/0x1090 [ 57.052591][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 57.059001][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.064673][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.071555][ T7] process_one_work+0x965/0x1690 [ 57.076582][ T7] ? lock_release+0x800/0x800 [ 57.081287][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 57.086668][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 57.091661][ T7] worker_thread+0x96/0xe10 [ 57.096557][ T7] ? process_one_work+0x1690/0x1690 [ 57.101812][ T7] kthread+0x3b5/0x4a0 [ 57.106604][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.112467][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.118319][ T7] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.0.236' (ECDSA) to the list of known hosts. 2020/06/14 19:09:11 fuzzer started 2020/06/14 19:09:12 connecting to host at 10.128.0.26:38581 2020/06/14 19:09:12 checking machine... 2020/06/14 19:09:12 checking revisions... 2020/06/14 19:09:12 testing simple program... [ 58.669758][ T6795] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6795 [ 58.678866][ T6795] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.684840][ T6795] CPU: 0 PID: 6795 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 58.692847][ T6795] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.702891][ T6795] Call Trace: [ 58.706188][ T6795] dump_stack+0x18f/0x20d [ 58.710500][ T6795] check_preemption_disabled+0x20d/0x220 [ 58.716108][ T6795] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.721199][ T6795] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.726646][ T6795] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.732349][ T6795] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.737616][ T6795] ? ext4_ext_release+0x10/0x10 [ 58.742455][ T6795] ? down_write_killable+0x170/0x170 [ 58.747717][ T6795] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.753162][ T6795] ext4_map_blocks+0x4cb/0x1640 [ 58.757991][ T6795] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.763163][ T6795] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.768703][ T6795] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.774657][ T6795] ? prandom_u32_state+0xe/0x170 [ 58.779585][ T6795] ? __brelse+0x84/0xa0 [ 58.783719][ T6795] ? __ext4_new_inode+0x144/0x55e0 [ 58.788822][ T6795] ext4_getblk+0xad/0x520 [ 58.793133][ T6795] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.798915][ T6795] ? ext4_free_inode+0x1700/0x1700 [ 58.804027][ T6795] ext4_bread+0x7c/0x380 [ 58.808269][ T6795] ? ext4_getblk+0x520/0x520 [ 58.812840][ T6795] ? dquot_get_next_dqblk+0x180/0x180 [ 58.818197][ T6795] ext4_append+0x153/0x360 [ 58.822596][ T6795] ext4_mkdir+0x5e0/0xdf0 [ 58.826908][ T6795] ? ext4_rmdir+0xde0/0xde0 [ 58.831508][ T6795] ? security_inode_permission+0xc4/0xf0 [ 58.837138][ T6795] vfs_mkdir+0x419/0x690 [ 58.841371][ T6795] do_mkdirat+0x21e/0x280 [ 58.845690][ T6795] ? __ia32_sys_mknod+0xb0/0xb0 [ 58.850531][ T6795] ? do_syscall_64+0x1c/0xe0 [ 58.855105][ T6795] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.861064][ T6795] do_syscall_64+0x60/0xe0 [ 58.865471][ T6795] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.871343][ T6795] RIP: 0033:0x4b02a0 [ 58.875212][ T6795] Code: Bad RIP value. [ 58.879250][ T6795] RSP: 002b:000000c0000e74b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 58.887810][ T6795] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 58.895758][ T6795] RDX: 00000000000001c0 RSI: 000000c00009ecc0 RDI: ffffffffffffff9c [ 58.904146][ T6795] RBP: 000000c0000e7510 R08: 0000000000000000 R09: 0000000000000000 [ 58.916107][ T6795] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 58.924068][ T6795] R13: 0000000000000067 R14: 0000000000000066 R15: 0000000000000100 [ 58.952108][ T6811] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6811 [ 58.961619][ T6811] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.967561][ T6811] CPU: 1 PID: 6811 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 58.975781][ T6811] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.986606][ T6811] Call Trace: [ 58.989943][ T6811] dump_stack+0x18f/0x20d [ 58.994450][ T6811] check_preemption_disabled+0x20d/0x220 [ 59.000186][ T6811] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.005314][ T6811] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.010777][ T6811] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.016633][ T6811] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.021914][ T6811] ? ext4_ext_release+0x10/0x10 [ 59.026783][ T6811] ? down_write_killable+0x170/0x170 [ 59.032059][ T6811] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.037561][ T6811] ext4_map_blocks+0x4cb/0x1640 [ 59.042473][ T6811] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.047683][ T6811] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.053396][ T6811] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.059367][ T6811] ? prandom_u32_state+0xe/0x170 [ 59.064297][ T6811] ? __brelse+0x84/0xa0 [ 59.068447][ T6811] ? __ext4_new_inode+0x144/0x55e0 [ 59.073552][ T6811] ext4_getblk+0xad/0x520 [ 59.077870][ T6811] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.083583][ T6811] ? ext4_free_inode+0x1700/0x1700 [ 59.088683][ T6811] ext4_bread+0x7c/0x380 [ 59.092905][ T6811] ? ext4_getblk+0x520/0x520 [ 59.100537][ T6811] ? dquot_get_next_dqblk+0x180/0x180 [ 59.105962][ T6811] ext4_append+0x153/0x360 [ 59.110368][ T6811] ext4_mkdir+0x5e0/0xdf0 [ 59.114706][ T6811] ? ext4_rmdir+0xde0/0xde0 [ 59.116898][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 59.119210][ T6811] ? security_inode_permission+0xc4/0xf0 [ 59.119241][ T6811] vfs_mkdir+0x419/0x690 [ 59.128410][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.133940][ T6811] do_mkdirat+0x21e/0x280 [ 59.133958][ T6811] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.133974][ T6811] ? do_syscall_64+0x1c/0xe0 [ 59.133988][ T6811] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.134002][ T6811] do_syscall_64+0x60/0xe0 [ 59.134017][ T6811] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.134027][ T6811] RIP: 0033:0x45bee7 [ 59.134032][ T6811] Code: Bad RIP value. [ 59.134038][ T6811] RSP: 002b:00007ffd947bcb48 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 59.134049][ T6811] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 59.134056][ T6811] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffd947bcd20 [ 59.134062][ T6811] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003140 [ 59.134069][ T6811] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 59.134076][ T6811] R13: 00007ffd947bcd20 R14: 8421084210842109 R15: 00007ffd947bcd2c [ 59.231480][ T1155] CPU: 0 PID: 1155 Comm: khugepaged Not tainted 5.7.0-syzkaller #0 [ 59.239410][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.249465][ T1155] Call Trace: [ 59.252768][ T1155] dump_stack+0x18f/0x20d [ 59.257114][ T1155] check_preemption_disabled+0x20d/0x220 [ 59.262757][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.267884][ T1155] ? ext4_find_extent+0x81a/0xad0 [ 59.272930][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.278410][ T1155] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.284148][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.289459][ T1155] ? ext4_ext_release+0x10/0x10 [ 59.294335][ T1155] ? down_write_killable+0x170/0x170 [ 59.299775][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.305250][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 59.310117][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.315331][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.320887][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.326881][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 59.332354][ T1155] ext4_writepages+0x1a7b/0x33c0 [ 59.337316][ T1155] ? lock_release+0x7c0/0x800 [ 59.340074][ T6813] IPVS: ftp: loaded support on port[0] = 21 [ 59.342129][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 59.342170][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 59.359326][ T1155] ? do_writepages+0xfa/0x2a0 [ 59.364019][ T1155] do_writepages+0xfa/0x2a0 [ 59.368587][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 59.374409][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 59.379451][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 59.384666][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 59.389534][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 59.395264][ T1155] ? collapse_file+0x35a2/0x4330 [ 59.400224][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 59.402063][ T6813] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6813 [ 59.406312][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 59.415731][ T6813] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.420861][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.432717][ T1155] collapse_file+0x35ac/0x4330 [ 59.437480][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 59.442835][ T1155] ? khugepaged+0x2506/0x3fc0 [ 59.447515][ T1155] ? xas_find+0x31a/0x880 [ 59.451829][ T1155] ? check_preemption_disabled+0x38/0x220 [ 59.457551][ T1155] khugepaged+0x3041/0x3fc0 [ 59.462057][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 59.467694][ T1155] ? lock_downgrade+0x840/0x840 [ 59.472530][ T1155] ? finish_wait+0x260/0x260 [ 59.477107][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 59.482912][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.488895][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 59.493903][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 59.499536][ T1155] kthread+0x3b5/0x4a0 [ 59.503590][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.509322][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.515025][ T1155] ret_from_fork+0x1f/0x30 [ 59.521314][ T6813] CPU: 1 PID: 6813 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.529562][ T6813] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.539785][ T6813] Call Trace: [ 59.543092][ T6813] dump_stack+0x18f/0x20d [ 59.549273][ T6813] check_preemption_disabled+0x20d/0x220 [ 59.555006][ T6813] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.560152][ T6813] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.565672][ T6813] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.571838][ T6813] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.577267][ T6813] ? ext4_ext_release+0x10/0x10 [ 59.582112][ T6813] ? down_write_killable+0x170/0x170 [ 59.589113][ T6813] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.594657][ T6813] ext4_map_blocks+0x4cb/0x1640 [ 59.602237][ T6813] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.607430][ T6813] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.612953][ T6813] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.618913][ T6813] ? prandom_u32_state+0xe/0x170 [ 59.623848][ T6813] ? __brelse+0x84/0xa0 [ 59.628162][ T6813] ? __ext4_new_inode+0x144/0x55e0 [ 59.633540][ T6813] ext4_getblk+0xad/0x520 [ 59.637920][ T6813] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.643647][ T6813] ? ext4_free_inode+0x1700/0x1700 [ 59.648744][ T6813] ext4_bread+0x7c/0x380 [ 59.652970][ T6813] ? ext4_getblk+0x520/0x520 [ 59.657556][ T6813] ? dquot_get_next_dqblk+0x180/0x180 [ 59.662945][ T6813] ext4_append+0x153/0x360 [ 59.667954][ T6813] ext4_mkdir+0x5e0/0xdf0 [ 59.672452][ T6813] ? ext4_rmdir+0xde0/0xde0 [ 59.677312][ T6813] ? security_inode_permission+0xc4/0xf0 [ 59.682960][ T6813] vfs_mkdir+0x419/0x690 [ 59.687188][ T6813] do_mkdirat+0x21e/0x280 [ 59.691504][ T6813] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.696355][ T6813] ? do_syscall_64+0x1c/0xe0 [ 59.703253][ T6813] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.709452][ T6813] do_syscall_64+0x60/0xe0 [ 59.713914][ T6813] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.719897][ T6813] RIP: 0033:0x45bee7 [ 59.724013][ T6813] Code: Bad RIP value. [ 59.728061][ T6813] RSP: 002b:0000000000c9ffa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 59.736868][ T6813] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 59.745210][ T6813] RDX: 0000000000000006 RSI: 00000000000001ff RDI: 00000000004c26e2 [ 59.753169][ T6813] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000006 [ 59.761308][ T6813] R10: 0000000000000064 R11: 0000000000000246 R12: 00000000004185d0 [ 59.769263][ T6813] R13: 00007ffd947bcea8 R14: 0000000000000000 R15: 0000000000000000 [ 59.797766][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 59.806930][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.813452][ T1155] CPU: 0 PID: 1155 Comm: khugepaged Not tainted 5.7.0-syzkaller #0 [ 59.821581][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.831635][ T1155] Call Trace: [ 59.834932][ T1155] dump_stack+0x18f/0x20d [ 59.839276][ T1155] check_preemption_disabled+0x20d/0x220 [ 59.844948][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.850093][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.855595][ T1155] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 59.861764][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.867098][ T1155] ? ext4_ext_release+0x10/0x10 [ 59.872068][ T1155] ? down_write_killable+0x170/0x170 [ 59.877360][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.882836][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 59.887738][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.892950][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.898856][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.904844][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 59.910322][ T1155] ext4_writepages+0x1a7b/0x33c0 [ 59.915272][ T1155] ? lock_release+0x7c0/0x800 [ 59.919974][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 59.925646][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 59.931284][ T1155] ? do_writepages+0xfa/0x2a0 [ 59.935967][ T1155] do_writepages+0xfa/0x2a0 [ 59.940655][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 59.946294][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 59.951770][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 59.956983][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 59.961850][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 59.967580][ T1155] ? collapse_file+0x35a2/0x4330 [ 59.972525][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 59.978613][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 59.983910][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.989998][ T1155] collapse_file+0x35ac/0x4330 2020/06/14 19:09:13 building call list... [ 59.994811][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 60.000192][ T1155] ? khugepaged+0x2506/0x3fc0 [ 60.004974][ T1155] ? xas_find+0x31a/0x880 [ 60.009663][ T1155] ? check_preemption_disabled+0x38/0x220 [ 60.015392][ T1155] khugepaged+0x3041/0x3fc0 [ 60.019933][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 60.025653][ T1155] ? lock_downgrade+0x840/0x840 [ 60.030508][ T1155] ? finish_wait+0x260/0x260 [ 60.035118][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 60.041035][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.047025][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 60.052055][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 60.057687][ T1155] kthread+0x3b5/0x4a0 [ 60.061845][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.067557][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.073278][ T1155] ret_from_fork+0x1f/0x30 [ 60.114882][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 60.124051][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.129953][ T1155] CPU: 0 PID: 1155 Comm: khugepaged Not tainted 5.7.0-syzkaller #0 [ 60.137945][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.148022][ T1155] Call Trace: [ 60.151333][ T1155] dump_stack+0x18f/0x20d [ 60.155666][ T1155] check_preemption_disabled+0x20d/0x220 [ 60.161990][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.167120][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.172588][ T1155] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 60.178748][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.184048][ T1155] ? ext4_ext_release+0x10/0x10 [ 60.188912][ T1155] ? down_write_killable+0x170/0x170 [ 60.194193][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.199657][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 60.204517][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.209720][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.215289][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.221264][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 60.226759][ T1155] ext4_writepages+0x1a7b/0x33c0 [ 60.231699][ T1155] ? lock_release+0x7c0/0x800 [ 60.236392][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.242051][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.247688][ T1155] ? do_writepages+0xfa/0x2a0 [ 60.252363][ T1155] do_writepages+0xfa/0x2a0 [ 60.256870][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 60.262499][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 60.267516][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 60.272709][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 60.277561][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 60.283279][ T1155] ? collapse_file+0x35a2/0x4330 [ 60.288219][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 60.294297][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 60.299501][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.305545][ T1155] collapse_file+0x35ac/0x4330 [ 60.310339][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 60.316087][ T1155] ? khugepaged+0x2506/0x3fc0 [ 60.320793][ T1155] ? xas_find+0x31a/0x880 [ 60.325130][ T1155] ? check_preemption_disabled+0x38/0x220 [ 60.330851][ T1155] khugepaged+0x3041/0x3fc0 [ 60.335393][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 60.341039][ T1155] ? lock_downgrade+0x840/0x840 [ 60.345915][ T1155] ? finish_wait+0x260/0x260 [ 60.350512][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 60.356382][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.362396][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 60.367538][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 60.373171][ T1155] kthread+0x3b5/0x4a0 [ 60.377351][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.383078][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.388804][ T1155] ret_from_fork+0x1f/0x30 [ 60.581359][ T7] tipc: TX() has been purged, node left! [ 61.103464][ T7] ================================================================== [ 61.113111][ T7] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 61.121005][ T7] Write of size 1 at addr ffff8880a28f91e4 by task kworker/u4:0/7 [ 61.128802][ T7] [ 61.131140][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 61.138932][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.148986][ T7] Workqueue: netns cleanup_net [ 61.153737][ T7] Call Trace: [ 61.157025][ T7] dump_stack+0x18f/0x20d [ 61.161355][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.166892][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.172438][ T7] ? afs_put_call+0xa40/0xa40 [ 61.177112][ T7] print_address_description.constprop.0.cold+0xd3/0x413 [ 61.184159][ T7] ? vprintk_func+0x97/0x1a6 [ 61.188841][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.194380][ T7] kasan_report.cold+0x1f/0x37 [ 61.199142][ T7] ? rcu_read_lock_held+0x81/0xb0 [ 61.204164][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.209706][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 61.215070][ T7] ? afs_close_socket+0x320/0x320 [ 61.220093][ T7] ? afs_put_call+0xa40/0xa40 [ 61.224790][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 61.229918][ T7] ? afs_put_call+0xa40/0xa40 [ 61.234592][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 61.241002][ T7] rxrpc_call_completed+0xca/0xf0 [ 61.246031][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 61.251408][ T7] ? lock_sock_nested+0x94/0x110 [ 61.256356][ T7] rxrpc_listen+0x147/0x360 [ 61.261831][ T7] afs_close_socket+0x95/0x320 [ 61.266611][ T7] ? afs_purge_servers+0x16d/0x300 [ 61.271736][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 61.277197][ T7] ? init_wait_var_entry+0x200/0x200 [ 61.282480][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.288107][ T7] ? check_preemption_disabled+0x38/0x220 [ 61.293834][ T7] afs_net_exit+0x1bc/0x310 [ 61.298337][ T7] ? afs_net_init+0xe30/0xe30 [ 61.303007][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 61.308118][ T7] cleanup_net+0x511/0xa50 [ 61.312538][ T7] ? unregister_pernet_device+0x70/0x70 [ 61.318084][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.324069][ T7] process_one_work+0x965/0x1690 [ 61.329040][ T7] ? lock_release+0x800/0x800 [ 61.333713][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.339087][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 61.344032][ T7] worker_thread+0x96/0xe10 [ 61.348545][ T7] ? process_one_work+0x1690/0x1690 [ 61.353746][ T7] kthread+0x3b5/0x4a0 [ 61.357806][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.363517][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.369241][ T7] ret_from_fork+0x1f/0x30 [ 61.373662][ T7] [ 61.375989][ T7] Allocated by task 6813: [ 61.380327][ T7] save_stack+0x1b/0x40 [ 61.384486][ T7] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.390118][ T7] kmem_cache_alloc_trace+0x153/0x7d0 [ 61.395485][ T7] afs_alloc_call+0x55/0x630 [ 61.400069][ T7] afs_charge_preallocation+0xe9/0x2d0 [ 61.405519][ T7] afs_open_socket+0x292/0x360 [ 61.410275][ T7] afs_net_init+0xa6c/0xe30 [ 61.414767][ T7] ops_init+0xaf/0x420 [ 61.418826][ T7] setup_net+0x2de/0x860 [ 61.423071][ T7] copy_net_ns+0x293/0x590 [ 61.427482][ T7] create_new_namespaces+0x3fb/0xb30 [ 61.432761][ T7] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 61.438385][ T7] ksys_unshare+0x43d/0x8e0 [ 61.442904][ T7] __x64_sys_unshare+0x2d/0x40 [ 61.447659][ T7] do_syscall_64+0x60/0xe0 [ 61.452085][ T7] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.457959][ T7] [ 61.460278][ T7] Freed by task 7: [ 61.463993][ T7] save_stack+0x1b/0x40 [ 61.468166][ T7] __kasan_slab_free+0xf7/0x140 [ 61.473008][ T7] kfree+0x109/0x2b0 [ 61.476894][ T7] afs_put_call+0x585/0xa40 [ 61.481413][ T7] rxrpc_discard_prealloc+0x764/0xab0 [ 61.486787][ T7] rxrpc_listen+0x147/0x360 [ 61.491282][ T7] afs_close_socket+0x95/0x320 [ 61.496036][ T7] afs_net_exit+0x1bc/0x310 [ 61.500529][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 61.505628][ T7] cleanup_net+0x511/0xa50 [ 61.510037][ T7] process_one_work+0x965/0x1690 [ 61.514984][ T7] worker_thread+0x96/0xe10 [ 61.519478][ T7] kthread+0x3b5/0x4a0 [ 61.523569][ T7] ret_from_fork+0x1f/0x30 [ 61.528147][ T7] [ 61.530495][ T7] The buggy address belongs to the object at ffff8880a28f9000 [ 61.530495][ T7] which belongs to the cache kmalloc-1k of size 1024 [ 61.544551][ T7] The buggy address is located 484 bytes inside of [ 61.544551][ T7] 1024-byte region [ffff8880a28f9000, ffff8880a28f9400) [ 61.558507][ T7] The buggy address belongs to the page: [ 61.564136][ T7] page:ffffea00028a3e40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 61.573236][ T7] flags: 0xfffe0000000200(slab) [ 61.578082][ T7] raw: 00fffe0000000200 ffffea00027b5048 ffffea0002796f08 ffff8880aa000c40 [ 61.586662][ T7] raw: 0000000000000000 ffff8880a28f9000 0000000100000002 0000000000000000 [ 61.595231][ T7] page dumped because: kasan: bad access detected [ 61.601630][ T7] [ 61.603950][ T7] Memory state around the buggy address: [ 61.609571][ T7] ffff8880a28f9080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.617647][ T7] ffff8880a28f9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.625718][ T7] >ffff8880a28f9180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.633853][ T7] ^ [ 61.641041][ T7] ffff8880a28f9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.649097][ T7] ffff8880a28f9280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program [ 61.657147][ T7] ================================================================== [ 61.665195][ T7] Disabling lock debugging due to kernel taint [ 61.671425][ T7] Kernel panic - not syncing: panic_on_warn set ... [ 61.678015][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Tainted: G B 5.7.0-syzkaller #0 [ 61.687207][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.697279][ T7] Workqueue: netns cleanup_net [ 61.702036][ T7] Call Trace: [ 61.705355][ T7] dump_stack+0x18f/0x20d [ 61.709691][ T7] ? afs_wake_up_async_call+0x5f0/0x770 [ 61.715232][ T7] ? afs_put_call+0xa40/0xa40 [ 61.719908][ T7] panic+0x2e3/0x75c [ 61.723808][ T7] ? __warn_printk+0xf3/0xf3 [ 61.728392][ T7] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 61.734971][ T7] ? trace_hardirqs_on+0x55/0x220 [ 61.739992][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.745529][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.751068][ T7] ? afs_put_call+0xa40/0xa40 [ 61.755752][ T7] end_report+0x4d/0x53 [ 61.759897][ T7] kasan_report.cold+0xd/0x37 [ 61.764576][ T7] ? rcu_read_lock_held+0x81/0xb0 [ 61.769590][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.775210][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 61.780566][ T7] ? afs_close_socket+0x320/0x320 [ 61.785573][ T7] ? afs_put_call+0xa40/0xa40 [ 61.790239][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 61.795328][ T7] ? afs_put_call+0xa40/0xa40 [ 61.800012][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 61.806411][ T7] rxrpc_call_completed+0xca/0xf0 [ 61.811442][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 61.816814][ T7] ? lock_sock_nested+0x94/0x110 [ 61.821735][ T7] rxrpc_listen+0x147/0x360 [ 61.826244][ T7] afs_close_socket+0x95/0x320 [ 61.830986][ T7] ? afs_purge_servers+0x16d/0x300 [ 61.836079][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 61.841526][ T7] ? init_wait_var_entry+0x200/0x200 [ 61.846804][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.852437][ T7] ? check_preemption_disabled+0x38/0x220 [ 61.858163][ T7] afs_net_exit+0x1bc/0x310 [ 61.862654][ T7] ? afs_net_init+0xe30/0xe30 [ 61.867332][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 61.872459][ T7] cleanup_net+0x511/0xa50 [ 61.876864][ T7] ? unregister_pernet_device+0x70/0x70 [ 61.882418][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.888387][ T7] process_one_work+0x965/0x1690 [ 61.893306][ T7] ? lock_release+0x800/0x800 [ 61.898515][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.903866][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 61.908924][ T7] worker_thread+0x96/0xe10 [ 61.913433][ T7] ? process_one_work+0x1690/0x1690 [ 61.918622][ T7] kthread+0x3b5/0x4a0 [ 61.922678][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.928429][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.934227][ T7] ret_from_fork+0x1f/0x30 [ 61.940077][ T7] Kernel Offset: disabled [ 61.944403][ T7] Rebooting in 86400 seconds..