[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ 48.884586][ T6702] sshd (6702) used greatest stack depth: 22000 bytes left [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. [ 51.637199][ T6724] scp (6724) used greatest stack depth: 21552 bytes left Starting Load/Save RF Kill Switch Status... [ 52.755773][ T6732] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6732 [ 52.765202][ T6732] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 52.771144][ T6732] CPU: 0 PID: 6732 Comm: systemd-rfkill Not tainted 5.7.0-next-20200611-syzkaller #0 [ 52.780608][ T6732] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.790640][ T6732] Call Trace: [ 52.793914][ T6732] dump_stack+0x18f/0x20d [ 52.798226][ T6732] check_preemption_disabled+0x20d/0x220 [ 52.803839][ T6732] ext4_mb_new_blocks+0xa4d/0x3b70 [ 52.808935][ T6732] ? ext4_ext_search_right+0x2ca/0xb20 [ 52.814388][ T6732] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 52.820174][ T6732] ext4_ext_map_blocks+0x201b/0x33e0 [ 52.825876][ T6732] ? ext4_ext_release+0x10/0x10 [ 52.830721][ T6732] ? down_write_killable+0x170/0x170 [ 52.835995][ T6732] ? ext4_es_lookup_extent+0x41d/0xd10 [ 52.841453][ T6732] ext4_map_blocks+0x4cb/0x1640 [ 52.846727][ T6732] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 52.851902][ T6732] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 52.857429][ T6732] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 52.863384][ T6732] ? prandom_u32_state+0xe/0x170 [ 52.868318][ T6732] ? __brelse+0x84/0xa0 [ 52.872453][ T6732] ? __ext4_new_inode+0x144/0x55e0 [ 52.877647][ T6732] ext4_getblk+0xad/0x520 [ 52.881955][ T6732] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 52.887654][ T6732] ? ext4_free_inode+0x1700/0x1700 [ 52.892758][ T6732] ext4_bread+0x7c/0x380 [ 52.896975][ T6732] ? ext4_getblk+0x520/0x520 [ 52.901544][ T6732] ? dquot_get_next_dqblk+0x180/0x180 [ 52.906895][ T6732] ext4_append+0x153/0x360 [ 52.911290][ T6732] ext4_mkdir+0x5e0/0xdf0 [ 52.915600][ T6732] ? ext4_rmdir+0xde0/0xde0 [ 52.920084][ T6732] ? security_inode_permission+0xc4/0xf0 [ 52.925698][ T6732] vfs_mkdir+0x419/0x690 [ 52.929919][ T6732] do_mkdirat+0x21e/0x280 [ 52.934242][ T6732] ? __ia32_sys_mknod+0xb0/0xb0 [ 52.939096][ T6732] ? do_syscall_64+0x1c/0xe0 [ 52.943687][ T6732] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 52.949647][ T6732] do_syscall_64+0x60/0xe0 [ 52.954071][ T6732] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 52.959952][ T6732] RIP: 0033:0x7fe0cb266687 [ 52.964345][ T6732] Code: Bad RIP value. [ 52.968386][ T6732] RSP: 002b:00007ffc7e08d868 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 52.976771][ T6732] RAX: ffffffffffffffda RBX: 0000557d7b8ba985 RCX: 00007fe0cb266687 [ 52.984739][ T6732] RDX: 00007ffc7e08d730 RSI: 00000000000001ed RDI: 0000557d7b8ba985 [ 52.992687][ T6732] RBP: 00007fe0cb266680 R08: 0000000000000100 R09: 0000000000000000 [ 53.000635][ T6732] R10: 0000557d7b8ba980 R11: 0000000000000246 R12: 00000000000001ed [ 53.008683][ T6732] R13: 00007ffc7e08d9f0 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 56.330341][ T21] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:1/21 [ 56.339405][ T21] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 56.345450][ T21] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.7.0-next-20200611-syzkaller #0 [ 56.354572][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.364749][ T21] Workqueue: writeback wb_workfn (flush-8:0) [ 56.370726][ T21] Call Trace: [ 56.374003][ T21] dump_stack+0x18f/0x20d [ 56.378316][ T21] check_preemption_disabled+0x20d/0x220 [ 56.383929][ T21] ext4_mb_new_blocks+0xa4d/0x3b70 [ 56.389017][ T21] ? ext4_find_extent+0x81a/0xad0 [ 56.394805][ T21] ? ext4_ext_search_right+0x2ca/0xb20 [ 56.400246][ T21] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 56.405960][ T21] ext4_ext_map_blocks+0x201b/0x33e0 [ 56.411247][ T21] ? ext4_ext_release+0x10/0x10 [ 56.416092][ T21] ? down_write_killable+0x170/0x170 [ 56.421509][ T21] ? ext4_es_lookup_extent+0x41d/0xd10 [ 56.426952][ T21] ext4_map_blocks+0x4cb/0x1640 [ 56.431791][ T21] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 56.436973][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.442495][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.448472][ T21] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 56.453910][ T21] ext4_writepages+0x1a83/0x33c0 [ 56.458837][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 56.464450][ T21] ? __lock_acquire+0x2224/0x48b0 [ 56.469638][ T21] ? ext4_da_get_block_prep+0x1120/0x1120 [ 56.475349][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 56.481310][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 56.486933][ T21] ? do_writepages+0xf3/0x2a0 [ 56.491587][ T21] do_writepages+0xf3/0x2a0 [ 56.496069][ T21] ? page_writeback_cpu_online+0x10/0x10 [ 56.503765][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.509305][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.515284][ T21] ? lock_downgrade+0x840/0x840 [ 56.520142][ T21] __writeback_single_inode+0x12a/0x13d0 [ 56.525753][ T21] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 56.531711][ T21] writeback_sb_inodes+0x541/0xe40 [ 56.537242][ T21] ? __writeback_single_inode+0x13d0/0x13d0 [ 56.543125][ T21] __writeback_inodes_wb+0xc6/0x280 [ 56.548352][ T21] wb_writeback+0x8c9/0xd40 [ 56.552835][ T21] ? find_held_lock+0x2d/0x110 [ 56.557579][ T21] ? writeback_inodes_wb.constprop.0+0x1d0/0x1d0 [ 56.563887][ T21] ? cpumask_next+0x3c/0x40 [ 56.568367][ T21] ? get_nr_dirty_inodes+0xd6/0x130 [ 56.573563][ T21] wb_workfn+0xab5/0x1090 [ 56.577903][ T21] ? inode_wait_for_writeback+0x30/0x30 [ 56.583458][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.589004][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.594987][ T21] process_one_work+0x965/0x1690 [ 56.600046][ T21] ? lock_release+0x800/0x800 [ 56.604709][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 56.610084][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 56.615022][ T21] worker_thread+0x96/0xe10 [ 56.619536][ T21] ? process_one_work+0x1690/0x1690 [ 56.624722][ T21] kthread+0x3b5/0x4a0 [ 56.628770][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 56.634467][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 56.640521][ T21] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.0.116' (ECDSA) to the list of known hosts. 2020/06/11 23:55:00 fuzzer started 2020/06/11 23:55:01 connecting to host at 10.128.0.26:33567 2020/06/11 23:55:01 checking machine... 2020/06/11 23:55:01 checking revisions... 2020/06/11 23:55:01 testing simple program... [ 58.495043][ T6808] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6808 [ 58.504126][ T6808] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.510086][ T6808] CPU: 0 PID: 6808 Comm: syz-fuzzer Not tainted 5.7.0-next-20200611-syzkaller #0 [ 58.519214][ T6808] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.529388][ T6808] Call Trace: [ 58.532660][ T6808] dump_stack+0x18f/0x20d [ 58.536987][ T6808] check_preemption_disabled+0x20d/0x220 [ 58.542689][ T6808] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.547784][ T6808] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.553262][ T6808] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.558985][ T6808] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.564298][ T6808] ? ext4_ext_release+0x10/0x10 [ 58.569166][ T6808] ? down_write_killable+0x170/0x170 [ 58.574443][ T6808] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.579884][ T6808] ext4_map_blocks+0x4cb/0x1640 [ 58.584718][ T6808] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.589894][ T6808] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.595419][ T6808] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.601377][ T6808] ? prandom_u32_state+0xe/0x170 [ 58.606295][ T6808] ? __brelse+0x84/0xa0 [ 58.610434][ T6808] ? __ext4_new_inode+0x144/0x55e0 [ 58.615536][ T6808] ext4_getblk+0xad/0x520 [ 58.624100][ T6808] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.629800][ T6808] ? ext4_free_inode+0x1700/0x1700 [ 58.636890][ T6808] ext4_bread+0x7c/0x380 [ 58.641129][ T6808] ? ext4_getblk+0x520/0x520 [ 58.645698][ T6808] ? dquot_get_next_dqblk+0x180/0x180 [ 58.651080][ T6808] ext4_append+0x153/0x360 [ 58.655483][ T6808] ext4_mkdir+0x5e0/0xdf0 [ 58.659795][ T6808] ? ext4_rmdir+0xde0/0xde0 [ 58.664278][ T6808] ? security_inode_permission+0xc4/0xf0 [ 58.669894][ T6808] vfs_mkdir+0x419/0x690 [ 58.674137][ T6808] do_mkdirat+0x21e/0x280 [ 58.678444][ T6808] ? __ia32_sys_mknod+0xb0/0xb0 [ 58.683277][ T6808] ? do_syscall_64+0x1c/0xe0 [ 58.687844][ T6808] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.693803][ T6808] do_syscall_64+0x60/0xe0 [ 58.698269][ T6808] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.704169][ T6808] RIP: 0033:0x4b02a0 [ 58.708054][ T6808] Code: Bad RIP value. [ 58.712112][ T6808] RSP: 002b:000000c0000cb4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 58.720596][ T6808] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 58.729279][ T6808] RDX: 00000000000001c0 RSI: 000000c000026e40 RDI: ffffffffffffff9c [ 58.737263][ T6808] RBP: 000000c0000cb510 R08: 0000000000000000 R09: 0000000000000000 [ 58.745232][ T6808] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 58.753184][ T6808] R13: 0000000000000073 R14: 0000000000000072 R15: 0000000000000100 [ 58.777847][ T6822] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6822 [ 58.787418][ T6822] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.793701][ T6822] CPU: 1 PID: 6822 Comm: syz-executor.0 Not tainted 5.7.0-next-20200611-syzkaller #0 [ 58.803189][ T6822] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.813251][ T6822] Call Trace: [ 58.816545][ T6822] dump_stack+0x18f/0x20d [ 58.820859][ T6822] check_preemption_disabled+0x20d/0x220 [ 58.826483][ T6822] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.831585][ T6822] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.837021][ T6822] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.842747][ T6822] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.848149][ T6822] ? ext4_ext_release+0x10/0x10 [ 58.852995][ T6822] ? down_write_killable+0x170/0x170 [ 58.858284][ T6822] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.863732][ T6822] ext4_map_blocks+0x4cb/0x1640 [ 58.868583][ T6822] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.873782][ T6822] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.879359][ T6822] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.885340][ T6822] ? prandom_u32_state+0xe/0x170 [ 58.890273][ T6822] ? __brelse+0x84/0xa0 [ 58.894424][ T6822] ? __ext4_new_inode+0x144/0x55e0 [ 58.899604][ T6822] ext4_getblk+0xad/0x520 [ 58.903933][ T6822] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.909636][ T6822] ? ext4_free_inode+0x1700/0x1700 [ 58.914730][ T6822] ext4_bread+0x7c/0x380 [ 58.919009][ T6822] ? ext4_getblk+0x520/0x520 [ 58.923585][ T6822] ? dquot_get_next_dqblk+0x180/0x180 [ 58.928951][ T6822] ext4_append+0x153/0x360 [ 58.933348][ T6822] ext4_mkdir+0x5e0/0xdf0 [ 58.937659][ T6822] ? ext4_rmdir+0xde0/0xde0 [ 58.942142][ T6822] ? security_inode_permission+0xc4/0xf0 [ 58.947754][ T6822] vfs_mkdir+0x419/0x690 [ 58.951976][ T6822] do_mkdirat+0x21e/0x280 [ 58.956286][ T6822] ? __ia32_sys_mknod+0xb0/0xb0 [ 58.961126][ T6822] ? do_syscall_64+0x1c/0xe0 [ 58.965692][ T6822] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.971851][ T6822] do_syscall_64+0x60/0xe0 [ 58.976249][ T6822] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.982121][ T6822] RIP: 0033:0x45bee7 [ 58.985986][ T6822] Code: Bad RIP value. [ 58.990026][ T6822] RSP: 002b:00007ffe1fd89028 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 58.998441][ T6822] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 59.006500][ T6822] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffe1fd89200 [ 59.014451][ T6822] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003440 [ 59.022403][ T6822] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 59.030362][ T6822] R13: 00007ffe1fd89200 R14: 8421084210842109 R15: 00007ffe1fd8920c [ 59.112692][ T6823] IPVS: ftp: loaded support on port[0] = 21 [ 59.150547][ T6823] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6823 [ 59.160033][ T6823] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.165920][ T6823] CPU: 1 PID: 6823 Comm: syz-executor.0 Not tainted 5.7.0-next-20200611-syzkaller #0 [ 59.175351][ T6823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.185386][ T6823] Call Trace: [ 59.188658][ T6823] dump_stack+0x18f/0x20d [ 59.192992][ T6823] check_preemption_disabled+0x20d/0x220 [ 59.198605][ T6823] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.203719][ T6823] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.209233][ T6823] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.214934][ T6823] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.220208][ T6823] ? ext4_ext_release+0x10/0x10 [ 59.225348][ T6823] ? down_write_killable+0x170/0x170 [ 59.230623][ T6823] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.236076][ T6823] ext4_map_blocks+0x4cb/0x1640 [ 59.240918][ T6823] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.246267][ T6823] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.251800][ T6823] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.257891][ T6823] ? prandom_u32_state+0xe/0x170 [ 59.262825][ T6823] ? __brelse+0x84/0xa0 [ 59.266979][ T6823] ? __ext4_new_inode+0x144/0x55e0 [ 59.272092][ T6823] ext4_getblk+0xad/0x520 [ 59.277196][ T6823] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.282913][ T6823] ? ext4_free_inode+0x1700/0x1700 [ 59.288011][ T6823] ext4_bread+0x7c/0x380 [ 59.292239][ T6823] ? ext4_getblk+0x520/0x520 [ 59.296819][ T6823] ? dquot_get_next_dqblk+0x180/0x180 [ 59.302194][ T6823] ext4_append+0x153/0x360 [ 59.306602][ T6823] ext4_mkdir+0x5e0/0xdf0 [ 59.310927][ T6823] ? ext4_rmdir+0xde0/0xde0 [ 59.315430][ T6823] ? security_inode_permission+0xc4/0xf0 [ 59.321059][ T6823] vfs_mkdir+0x419/0x690 [ 59.325313][ T6823] do_mkdirat+0x21e/0x280 [ 59.329622][ T6823] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.334454][ T6823] ? do_syscall_64+0x1c/0xe0 [ 59.339031][ T6823] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.345000][ T6823] do_syscall_64+0x60/0xe0 [ 59.350265][ T6823] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.356137][ T6823] RIP: 0033:0x45bee7 [ 59.360004][ T6823] Code: Bad RIP value. [ 59.364061][ T6823] RSP: 002b:00007ffe1fd88f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 59.372445][ T6823] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 59.380394][ T6823] RDX: 00007ffe1fd88f63 RSI: 00000000000001ff RDI: 00007ffe1fd88f60 [ 59.389315][ T6823] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 59.397279][ T6823] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185d0 [ 59.405238][ T6823] R13: 00007ffe1fd88f50 R14: 0000000000000000 R15: 00007ffe1fd88f60 [ 59.466799][ T6823] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6823 [ 59.476482][ T6823] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.483007][ T6823] CPU: 1 PID: 6823 Comm: syz-executor.0 Not tainted 5.7.0-next-20200611-syzkaller #0 [ 59.492461][ T6823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.502527][ T6823] Call Trace: [ 59.505827][ T6823] dump_stack+0x18f/0x20d [ 59.510173][ T6823] check_preemption_disabled+0x20d/0x220 [ 59.515822][ T6823] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.521012][ T6823] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.526450][ T6823] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.532174][ T6823] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.537471][ T6823] ? ext4_ext_release+0x10/0x10 [ 59.542339][ T6823] ? down_write_killable+0x170/0x170 [ 59.547633][ T6823] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.553142][ T6823] ext4_map_blocks+0x4cb/0x1640 [ 59.558306][ T6823] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.563501][ T6823] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.569068][ T6823] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.575042][ T6823] ? prandom_u32_state+0xe/0x170 [ 59.579975][ T6823] ? __brelse+0x84/0xa0 [ 59.584120][ T6823] ? __ext4_new_inode+0x144/0x55e0 [ 59.589271][ T6823] ext4_getblk+0xad/0x520 [ 59.593595][ T6823] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.599308][ T6823] ? ext4_free_inode+0x1700/0x1700 [ 59.604412][ T6823] ext4_bread+0x7c/0x380 [ 59.608635][ T6823] ? ext4_getblk+0x520/0x520 [ 59.613226][ T6823] ? dquot_get_next_dqblk+0x180/0x180 [ 59.618580][ T6823] ext4_append+0x153/0x360 [ 59.622980][ T6823] ext4_mkdir+0x5e0/0xdf0 [ 59.627305][ T6823] ? ext4_rmdir+0xde0/0xde0 [ 59.631806][ T6823] ? security_inode_permission+0xc4/0xf0 [ 59.637428][ T6823] vfs_mkdir+0x419/0x690 [ 59.641665][ T6823] do_mkdirat+0x21e/0x280 [ 59.645974][ T6823] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.650807][ T6823] ? do_syscall_64+0x1c/0xe0 [ 59.656349][ T6823] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.662333][ T6823] do_syscall_64+0x60/0xe0 [ 59.666752][ T6823] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.672642][ T6823] RIP: 0033:0x45bee7 [ 59.676538][ T6823] Code: Bad RIP value. [ 59.680590][ T6823] RSP: 002b:00007ffe1fd88f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 59.689001][ T6823] RAX: ffffffffffffffda RBX: 000000000000e839 RCX: 000000000045bee7 [ 59.697418][ T6823] RDX: 00007ffe1fd88f63 RSI: 00000000000001ff RDI: 00007ffe1fd88f60 [ 59.705393][ T6823] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 59.713356][ T6823] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 59.721332][ T6823] R13: 00007ffe1fd88f50 R14: 000000000000e827 R15: 00007ffe1fd88f60 2020/06/11 23:55:02 building call list... [ 59.968993][ T21] tipc: TX() has been purged, node left! [ 60.510967][ T21] ================================================================== [ 60.519188][ T21] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 60.527076][ T21] Write of size 1 at addr ffff8880a29b31e4 by task kworker/u4:1/21 [ 60.534948][ T21] [ 60.537285][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.7.0-next-20200611-syzkaller #0 [ 60.546378][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.556437][ T21] Workqueue: netns cleanup_net [ 60.561194][ T21] Call Trace: [ 60.564490][ T21] dump_stack+0x18f/0x20d [ 60.568844][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.574386][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.579926][ T21] ? afs_put_call+0xa40/0xa40 [ 60.584602][ T21] print_address_description.constprop.0.cold+0xd3/0x413 [ 60.591651][ T21] ? vprintk_func+0x97/0x1a6 [ 60.596242][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.602128][ T21] kasan_report.cold+0x1f/0x37 [ 60.606892][ T21] ? rcu_read_lock_held_common+0x71/0xa0 [ 60.612520][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.618062][ T21] afs_wake_up_async_call+0x6aa/0x770 [ 60.623441][ T21] ? afs_close_socket+0x320/0x320 [ 60.628461][ T21] ? afs_put_call+0xa40/0xa40 [ 60.633132][ T21] rxrpc_notify_socket+0x1db/0x5d0 [ 60.638241][ T21] ? afs_put_call+0xa40/0xa40 [ 60.642918][ T21] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 60.649766][ T21] rxrpc_call_completed+0xca/0xf0 [ 60.654790][ T21] rxrpc_discard_prealloc+0x781/0xab0 [ 60.660167][ T21] ? lock_sock_nested+0x94/0x110 [ 60.665147][ T21] rxrpc_listen+0x147/0x360 [ 60.669843][ T21] afs_close_socket+0x95/0x320 [ 60.674633][ T21] ? afs_purge_servers+0x16d/0x300 [ 60.679780][ T21] ? afs_rx_discard_new_call+0x50/0x50 [ 60.685255][ T21] ? init_wait_var_entry+0x200/0x200 [ 60.690562][ T21] ? rcu_read_lock_held_common+0xa0/0xa0 [ 60.696192][ T21] ? check_preemption_disabled+0x38/0x220 [ 60.701913][ T21] afs_net_exit+0x1bc/0x310 [ 60.706417][ T21] ? afs_net_init+0xe30/0xe30 [ 60.711110][ T21] ops_exit_list.isra.0+0xa8/0x150 [ 60.716225][ T21] cleanup_net+0x511/0xa50 [ 60.720644][ T21] ? unregister_pernet_device+0x70/0x70 [ 60.726204][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.732194][ T21] process_one_work+0x965/0x1690 [ 60.737144][ T21] ? lock_release+0x800/0x800 [ 60.741821][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 60.747194][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 60.752149][ T21] worker_thread+0x96/0xe10 [ 60.756668][ T21] ? process_one_work+0x1690/0x1690 [ 60.761865][ T21] kthread+0x3b5/0x4a0 [ 60.765930][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.771651][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.777380][ T21] ret_from_fork+0x1f/0x30 [ 60.781803][ T21] [ 60.784129][ T21] Allocated by task 6823: [ 60.788456][ T21] save_stack+0x1b/0x40 [ 60.792607][ T21] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 60.798242][ T21] kmem_cache_alloc_trace+0x153/0x7d0 [ 60.803610][ T21] afs_alloc_call+0x55/0x630 [ 60.808195][ T21] afs_charge_preallocation+0xe9/0x2d0 [ 60.813648][ T21] afs_open_socket+0x292/0x360 [ 60.818412][ T21] afs_net_init+0xa6c/0xe30 [ 60.822908][ T21] ops_init+0xaf/0x420 [ 60.826969][ T21] setup_net+0x2de/0x860 [ 60.831203][ T21] copy_net_ns+0x293/0x590 [ 60.835617][ T21] create_new_namespaces+0x3fb/0xb30 [ 60.840925][ T21] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 60.846559][ T21] ksys_unshare+0x43d/0x8e0 [ 60.851070][ T21] __x64_sys_unshare+0x2d/0x40 [ 60.855829][ T21] do_syscall_64+0x60/0xe0 [ 60.860239][ T21] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.866118][ T21] [ 60.868438][ T21] Freed by task 21: [ 60.872241][ T21] save_stack+0x1b/0x40 [ 60.876390][ T21] __kasan_slab_free+0xf7/0x140 [ 60.881237][ T21] kfree+0x109/0x2b0 [ 60.885128][ T21] afs_put_call+0x585/0xa40 [ 60.889635][ T21] rxrpc_discard_prealloc+0x764/0xab0 [ 60.895004][ T21] rxrpc_listen+0x147/0x360 [ 60.899594][ T21] afs_close_socket+0x95/0x320 [ 60.904352][ T21] afs_net_exit+0x1bc/0x310 [ 60.908849][ T21] ops_exit_list.isra.0+0xa8/0x150 [ 60.914040][ T21] cleanup_net+0x511/0xa50 [ 60.919064][ T21] process_one_work+0x965/0x1690 [ 60.924431][ T21] worker_thread+0x96/0xe10 [ 60.928931][ T21] kthread+0x3b5/0x4a0 [ 60.933443][ T21] ret_from_fork+0x1f/0x30 [ 60.937845][ T21] [ 60.940203][ T21] The buggy address belongs to the object at ffff8880a29b3000 [ 60.940203][ T21] which belongs to the cache kmalloc-1k of size 1024 [ 60.954250][ T21] The buggy address is located 484 bytes inside of [ 60.954250][ T21] 1024-byte region [ffff8880a29b3000, ffff8880a29b3400) [ 60.967599][ T21] The buggy address belongs to the page: [ 60.973232][ T21] page:ffffea00028a6cc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 60.982334][ T21] flags: 0xfffe0000000200(slab) [ 60.987187][ T21] raw: 00fffe0000000200 ffffea000287bec8 ffffea0002864a88 ffff8880aa000c40 [ 60.995772][ T21] raw: 0000000000000000 ffff8880a29b3000 0000000100000002 0000000000000000 [ 61.004344][ T21] page dumped because: kasan: bad access detected [ 61.010745][ T21] [ 61.013070][ T21] Memory state around the buggy address: [ 61.018695][ T21] ffff8880a29b3080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.026751][ T21] ffff8880a29b3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.034806][ T21] >ffff8880a29b3180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.042858][ T21] ^ [ 61.050070][ T21] ffff8880a29b3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.058126][ T21] ffff8880a29b3280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.066177][ T21] ================================================================== [ 61.074229][ T21] Disabling lock debugging due to kernel taint [ 61.080532][ T21] Kernel panic - not syncing: panic_on_warn set ... [ 61.087240][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Tainted: G B 5.7.0-next-20200611-syzkaller #0 [ 61.097724][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.107784][ T21] Workqueue: netns cleanup_net [ 61.112538][ T21] Call Trace: [ 61.115826][ T21] dump_stack+0x18f/0x20d [ 61.120151][ T21] ? afs_wake_up_async_call+0x660/0x770 [ 61.125701][ T21] ? afs_put_call+0xa40/0xa40 [ 61.130368][ T21] panic+0x2e3/0x75c [ 61.134258][ T21] ? __warn_printk+0xf3/0xf3 [ 61.138865][ T21] ? asm_common_interrupt+0x1e/0x40 [ 61.144066][ T21] ? trace_hardirqs_on+0x55/0x220 [ 61.149086][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.154792][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.160764][ T21] ? afs_put_call+0xa40/0xa40 [ 61.165433][ T21] end_report+0x4d/0x53 [ 61.169583][ T21] kasan_report.cold+0xd/0x37 [ 61.174946][ T21] ? rcu_read_lock_held_common+0x71/0xa0 [ 61.180569][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.186108][ T21] afs_wake_up_async_call+0x6aa/0x770 [ 61.191498][ T21] ? afs_close_socket+0x320/0x320 [ 61.196516][ T21] ? afs_put_call+0xa40/0xa40 [ 61.201183][ T21] rxrpc_notify_socket+0x1db/0x5d0 [ 61.206367][ T21] ? afs_put_call+0xa40/0xa40 [ 61.211138][ T21] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 61.217565][ T21] rxrpc_call_completed+0xca/0xf0 [ 61.222592][ T21] rxrpc_discard_prealloc+0x781/0xab0 [ 61.227964][ T21] ? lock_sock_nested+0x94/0x110 [ 61.232900][ T21] rxrpc_listen+0x147/0x360 [ 61.237404][ T21] afs_close_socket+0x95/0x320 [ 61.242170][ T21] ? afs_purge_servers+0x16d/0x300 [ 61.247299][ T21] ? afs_rx_discard_new_call+0x50/0x50 [ 61.252763][ T21] ? init_wait_var_entry+0x200/0x200 [ 61.258056][ T21] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.263702][ T21] ? check_preemption_disabled+0x38/0x220 [ 61.269421][ T21] afs_net_exit+0x1bc/0x310 [ 61.273925][ T21] ? afs_net_init+0xe30/0xe30 [ 61.278603][ T21] ops_exit_list.isra.0+0xa8/0x150 [ 61.283721][ T21] cleanup_net+0x511/0xa50 [ 61.288321][ T21] ? unregister_pernet_device+0x70/0x70 [ 61.293868][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.299856][ T21] process_one_work+0x965/0x1690 [ 61.304805][ T21] ? lock_release+0x800/0x800 executing program [ 61.309481][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.315815][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 61.320755][ T21] worker_thread+0x96/0xe10 [ 61.325255][ T21] ? process_one_work+0x1690/0x1690 [ 61.330576][ T21] kthread+0x3b5/0x4a0 [ 61.334667][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.340401][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.346095][ T21] ret_from_fork+0x1f/0x30 [ 61.351838][ T21] Kernel Offset: disabled [ 61.356257][ T21] Rebooting in 86400 seconds..