Warning: Permanently added '10.128.0.101' (ECDSA) to the list of known hosts. 2019/10/30 15:45:21 parsed 1 programs 2019/10/30 15:45:23 executed programs: 0 2019/10/30 15:45:28 executed programs: 25 syzkaller login: [ 29.890075] ------------[ cut here ]------------ [ 29.895657] WARNING: CPU: 0 PID: 2220 at fs/ext4/inode.c:3327 ext4_direct_IO+0x226d/0x2a80() [ 29.904383] Kernel panic - not syncing: panic_on_warn set ... [ 29.904383] [ 29.911737] CPU: 0 PID: 2220 Comm: syz-executor.0 Not tainted 4.4.174+ #4 [ 29.918649] 0000000000000000 8fed1bba8e97d824 ffff8800b4c57588 ffffffff81aad1a1 [ 29.926656] 0000000000000000 ffffffff82835ee0 ffffffff828bfa40 0000000000000cff [ 29.934689] ffffffff816417cd ffff8800b4c57668 ffffffff813a48c2 0000000041b58ab3 [ 29.942783] Call Trace: [ 29.945352] [] dump_stack+0xc1/0x120 [ 29.950782] [] ? ext4_direct_IO+0x226d/0x2a80 [ 29.956908] [] panic+0x1b9/0x37b [ 29.961908] [] ? add_taint.cold+0x16/0x16 [ 29.967682] [] ? warn_slowpath_common.cold+0x5/0x20 [ 29.974345] [] warn_slowpath_common.cold+0x20/0x20 [ 29.980920] [] warn_slowpath_null+0x2a/0x30 [ 29.986870] [] ext4_direct_IO+0x226d/0x2a80 [ 29.992819] [] ? ext4_update_bh_state+0xf0/0xf0 [ 29.999125] [] ? ext4_end_io_dio+0xc0/0xc0 [ 30.004996] [] ? trace_hardirqs_on+0x10/0x10 [ 30.014012] [] ? trace_hardirqs_on+0x10/0x10 [ 30.020055] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 30.026783] [] ? check_preemption_disabled+0x3c/0x200 [ 30.033612] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 30.040355] [] ? mark_held_locks+0xb1/0x100 [ 30.046307] [] ? filemap_check_errors+0x9d/0xe0 [ 30.052628] [] generic_file_direct_write+0x276/0x4f0 [ 30.059390] [] ? current_fs_time+0x18/0x70 [ 30.065296] [] ? filemap_write_and_wait_range+0xb0/0xb0 [ 30.072296] [] ? file_update_time+0xc1/0x3c0 [ 30.078341] [] ? mutex_trylock+0x500/0x500 [ 30.084218] [] __generic_file_write_iter+0x245/0x540 [ 30.090952] [] ext4_file_write_iter+0x9ec/0xc70 [ 30.097346] [] ? depot_save_stack+0x1c3/0x5f0 [ 30.103485] [] ? ext4_unwritten_wait+0x200/0x200 [ 30.109869] [] ? check_preemption_disabled+0x3c/0x200 [ 30.116685] [] ? check_preemption_disabled+0x3c/0x200 [ 30.123772] [] ? rcu_read_lock_sched_held+0x10b/0x130 [ 30.130599] [] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 30.137166] [] ? aio_run_iocb+0x682/0x6f0 [ 30.142951] [] aio_run_iocb+0x4ff/0x6f0 [ 30.149071] [] ? ext4_unwritten_wait+0x200/0x200 [ 30.155462] [] ? aio_complete+0xb90/0xb90 [ 30.161236] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 30.167976] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 30.174710] [] ? __might_fault+0x117/0x1d0 [ 30.180590] [] do_io_submit+0x639/0xf10 [ 30.186190] [] ? do_io_submit+0x2d2/0xf10 [ 30.191961] [] ? SyS_io_destroy+0x350/0x350 [ 30.199479] [] ? SyS_clock_gettime+0x118/0x1e0 [ 30.205685] [] ? SyS_clock_settime+0x220/0x220 [ 30.211913] [] SyS_io_submit+0x28/0x30 [ 30.217425] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 30.224579] Kernel Offset: disabled [ 30.228223] Rebooting in 86400 seconds..