Warning: Permanently added '10.128.0.92' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.365676] kasan: CONFIG_KASAN_INLINE enabled [ 43.372099] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.385534] Modules linked in: [ 43.388896] CPU: 1 PID: 2078 Comm: syz-executor171 Not tainted 4.4.174+ #17 [ 43.396950] task: ffff8801d4555f00 task.stack: ffff8800b6a08000 [ 43.403029] RIP: 0010:[] [] __blockdev_direct_IO+0x36ea/0xb030 [ 43.412339] RSP: 0018:ffff8800b6a0f200 EFLAGS: 00010202 [ 43.417958] RAX: 0000000000000004 RBX: dffffc0000000000 RCX: 000000000000000c [ 43.425305] RDX: 0000000000000000 RSI: ffffffff81557477 RDI: 0000000000000020 [ 43.432665] RBP: ffff8800b6a0f518 R08: 1ffff1003ae35600 R09: ffff8801d71ab000 [ 43.440121] R10: ffffed003ae3560e R11: ffff8801d71ab077 R12: ffffea0002da7000 [ 43.447372] R13: ffff8801d71ab000 R14: ffff8801da011140 R15: ffff8800b69a8000 [ 43.454630] FS: 0000000000000000(0000) GS:ffff8801db700000(0063) knlGS:00000000f77dfb40 [ 43.462920] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 43.468796] CR2: 00000000200110ff CR3: 00000000b6fa8000 CR4: 00000000001606b0 [ 43.476056] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.483330] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.490796] Stack: [ 43.492926] fffffbfff05c2202 ffff8800b6a0f310 0005080000000000 0000000000001000 [ 43.500936] 0000000000008220 ffff8800b69a8079 0000000041b58ab3 0000000000011000 [ 43.508956] ffff8800b6a0f360 00001000d45567c0 fffffffffffff000 0000000000000fff [ 43.516979] Call Trace: [ 43.519571] [] ? sb_init_dio_done_wq+0x80/0x80 [ 43.525797] [] ? check_preemption_disabled+0x3c/0x200 [ 43.532638] [] ? check_preemption_disabled+0x3c/0x200 [ 43.539465] [] ? _ext4_get_block+0x690/0x690 [ 43.545523] [] ? ext4_ind_direct_IO+0x6dc/0xb90 [ 43.551834] [] ? ext4_journal_check_start+0x116/0x1a0 [ 43.558667] [] ? __ext4_journal_start_sb+0x13e/0x510 [ 43.565405] [] ext4_ind_direct_IO+0x3e1/0xb90 [ 43.571534] [] ? ext4_ind_map_blocks+0x21f0/0x21f0 [ 43.578096] [] ext4_direct_IO+0x8c1/0x2a80 [ 43.583965] [] ? __lock_acquire+0x22e3/0x4f50 [ 43.590095] [] ? ext4_end_io_dio+0xc0/0xc0 [ 43.595961] [] ? trace_hardirqs_on+0x10/0x10 [ 43.603319] [] ? ext4_xattr_security_get+0x85/0xb0 [ 43.609919] [] ? generic_getxattr+0x128/0x1a0 [ 43.616057] [] ? xattr_resolve_name+0x1f0/0x1f0 [ 43.622366] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 43.629384] [] ? mark_held_locks+0xb1/0x100 [ 43.635344] [] ? filemap_check_errors+0x9d/0xe0 [ 43.641648] [] generic_file_direct_write+0x276/0x4f0 [ 43.648478] [] ? current_fs_time+0x18/0x70 [ 43.654362] [] ? filemap_write_and_wait_range+0xb0/0xb0 [ 43.661471] [] ? file_update_time+0xc1/0x3c0 [ 43.667510] [] ? mutex_trylock+0x500/0x500 [ 43.673387] [] __generic_file_write_iter+0x245/0x540 [ 43.680138] [] ext4_file_write_iter+0x9ec/0xc70 [ 43.686459] [] ? ext4_unwritten_wait+0x200/0x200 [ 43.692851] [] ? mark_held_locks+0xb1/0x100 [ 43.698804] [] ? pipe_lock+0x63/0x80 [ 43.704161] [] ? mutex_lock_nested+0x7dd/0xb80 [ 43.710390] [] ? mutex_lock_nested+0x645/0xb80 [ 43.716613] [] ? pipe_lock+0x63/0x80 [ 43.722045] [] vfs_iter_write+0x1d0/0x3f0 [ 43.727838] [] ? default_llseek+0x290/0x290 [ 43.734227] [] ? mutex_trylock+0x500/0x500 [ 43.740110] [] ? kasan_unpoison_shadow+0x35/0x50 [ 43.746695] [] ? splice_from_pipe_next.part.0+0x20d/0x2c0 [ 43.754464] [] iter_file_splice_write+0x5c1/0xb30 [ 43.760953] [] ? vmsplice_to_user+0x1e0/0x1e0 [ 43.767292] [] ? rcu_read_lock_sched_held+0x10b/0x130 [ 43.774130] [] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 43.780707] [] ? __sb_start_write+0x14f/0x310 [ 43.786929] [] ? vmsplice_to_user+0x1e0/0x1e0 [ 43.793056] [] SyS_splice+0xd71/0x13a0 [ 43.798575] [] ? compat_SyS_vmsplice+0x160/0x160 [ 43.804964] [] ? __do_page_fault+0x2b3/0x7f0 [ 43.811034] [] ? do_fast_syscall_32+0xd6/0xa90 [ 43.817263] [] ? compat_SyS_vmsplice+0x160/0x160 [ 43.823699] [] do_fast_syscall_32+0x32d/0xa90 [ 43.829871] [] sysenter_flags_fixed+0xd/0x1a [ 43.835908] Code: 00 00 e8 aa a9 e8 ff 48 c7 84 24 50 02 00 00 00 00 00 00 e8 79 21 db ff 48 8b 84 24 c8 00 00 00 48 8d 78 20 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 10 5b 00 00 48 8b 84 24 c8 00 00 00 48 8b 40 [ 43.863469] RIP [] __blockdev_direct_IO+0x36ea/0xb030 [ 43.870432] RSP [ 43.874639] ---[ end trace ef72e9714e43d6ba ]--- [ 43.879410] Kernel panic - not syncing: Fatal exception [ 43.885651] Kernel Offset: disabled [ 43.889286] Rebooting in 86400 seconds..