[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 9.605815] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.150482] random: crng init done Warning: Permanently added '10.128.0.187' (ECDSA) to the list of known hosts. executing program [ 49.376411] kasan: CONFIG_KASAN_INLINE enabled [ 49.381195] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 49.388565] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 49.394780] Modules linked in: [ 49.398076] CPU: 1 PID: 2052 Comm: syz-executor263 Not tainted 4.9.194+ #0 [ 49.405062] task: 00000000b0fa2146 task.stack: 00000000f9cd8255 [ 49.411203] RIP: 0010:[] [<0000000043fc37a7>] __blockdev_direct_IO+0x1c55/0xd370 [ 49.420509] RSP: 0018:ffff8801ce9c7310 EFLAGS: 00010202 [ 49.425940] RAX: dffffc0000000000 RBX: ffffea00073a3c1c RCX: 000000000000000c [ 49.433365] RDX: 0000000000000004 RSI: ffffffff815dd948 RDI: 0000000000000020 [ 49.440628] RBP: ffff8801ce9c7650 R08: 0000000000000000 R09: ffff8801d0170e00 [ 49.447888] R10: ffffed003a02e1cd R11: ffff8801d0170e6f R12: ffffea00073a3c00 [ 49.455222] R13: ffffea00073a3c00 R14: 0000000000000000 R15: ffff8801c59e4000 [ 49.462471] FS: 0000000000cf7880(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 [ 49.470675] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.476533] CR2: 0000000020011000 CR3: 00000001cec9c000 CR4: 00000000001606b0 [ 49.483783] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.491031] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.498277] Stack: [ 49.500408] ffffffff83cc8f60 0000000000000003 1ffff1003a0b1df5 ffff8801d058efa8 [ 49.508428] ffff8801d058df00 ffff8801ce9c7440 0005080000000000 0000000000001000 [ 49.516435] ffff8801c59e4079 ffff8801d058df00 ffff8801d9190b80 ffff880100000000 [ 49.524446] Call Trace: [ 49.527017] [<00000000e4bbb45f>] ? sb_init_dio_done_wq+0x80/0x80 [ 49.533226] [<00000000c70cd18e>] ? ext4_dio_get_block_unwritten_sync+0x100/0x100 [ 49.540835] [<000000000083be7e>] ? ext4_direct_IO+0xc17/0x29b0 [ 49.546879] [<00000000b8014977>] ? ext4_direct_IO+0xc69/0x29b0 [ 49.552919] [<0000000035d64612>] ? __ext4_journal_stop+0xea/0x1c0 [ 49.559210] [<0000000055f1fe24>] ext4_direct_IO+0xa1d/0x29b0 [ 49.565065] [<00000000c70cd18e>] ? ext4_dio_get_block_unwritten_sync+0x100/0x100 [ 49.572661] [<00000000c2e15be8>] ? ext4_da_write_begin+0x1080/0x1080 [ 49.579217] [<00000000980bbe08>] ? trace_hardirqs_on+0x10/0x10 [ 49.585254] [<000000005e2898d7>] ? ext4_xattr_security_set+0x40/0x40 [ 49.591808] [<00000000727d3d5f>] ? ext4_xattr_security_get+0x32/0x40 [ 49.598366] [<00000000c35e8110>] ? __vfs_getxattr+0xea/0x140 [ 49.604231] [<00000000e39864e6>] ? __vfs_setxattr+0x170/0x170 [ 49.610187] [<00000000e8bfe7aa>] ? __lock_acquire+0x26fe/0x4390 [ 49.616307] [<00000000ae2fb4ae>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 49.623033] [<00000000e9556d74>] ? mark_held_locks+0xb1/0x100 [ 49.628979] [<00000000747b5bdf>] ? filemap_check_errors+0x90/0xc0 [ 49.635273] [<00000000a2f305ba>] generic_file_direct_write+0x293/0x520 [ 49.642003] [<000000008749dbfe>] ? current_kernel_time64+0xbc/0x110 [ 49.648469] [<000000007d5f8194>] ? filemap_write_and_wait_range+0xb0/0xb0 [ 49.655466] [<000000007a9e579c>] ? file_update_time+0xc1/0x390 [ 49.661498] [<00000000212ed7aa>] __generic_file_write_iter+0x20f/0x530 [ 49.668232] [<00000000c5f34ebf>] ? generic_write_checks+0x245/0x410 [ 49.674696] [<0000000015c5ce42>] ext4_file_write_iter+0x6e7/0xcd0 [ 49.680991] [<00000000ed889951>] ? ext4_llseek+0x8e0/0x8e0 [ 49.686763] [<00000000e9556d74>] ? mark_held_locks+0xb1/0x100 [ 49.692708] [<000000002e3ba232>] ? mutex_lock_nested+0x6c7/0x920 [ 49.698914] [<000000009d42e641>] ? trace_hardirqs_on_caller+0x385/0x5a0 [ 49.705727] [<00000000d86b4c3a>] vfs_iter_write+0x2e2/0x580 [ 49.711499] [<00000000d3af295d>] ? do_iter_readv_writev+0x4b0/0x4b0 [ 49.717968] [<00000000e0ddadc1>] ? mutex_trylock+0x3f0/0x3f0 [ 49.723830] [<00000000269f25b6>] ? kasan_unpoison_shadow+0x35/0x50 [ 49.730210] [<0000000066347d57>] ? splice_from_pipe_next.part.0+0x1e9/0x290 [ 49.737368] [<00000000064a291d>] iter_file_splice_write+0x5a9/0xb10 [ 49.743838] [<00000000b84dfc55>] ? vmsplice_to_user+0x1e0/0x1e0 [ 49.749959] [<00000000b3d5adcf>] ? rcu_read_lock_sched_held+0x10b/0x130 [ 49.756769] [<0000000012d6fbdd>] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 49.763349] [<0000000092a680cb>] ? __sb_start_write+0x161/0x310 [ 49.763358] [<00000000b84dfc55>] ? vmsplice_to_user+0x1e0/0x1e0 [ 49.763363] [<00000000e62f58a7>] SyS_splice+0xe02/0x14c0 [ 49.763373] [<00000000cd686671>] ? compat_SyS_vmsplice+0x160/0x160 [ 49.763379] [<00000000fa08b4bb>] ? do_syscall_64+0x4a/0x5c0 [ 49.763385] [<00000000cd686671>] ? compat_SyS_vmsplice+0x160/0x160 [ 49.763390] [<00000000473850fd>] do_syscall_64+0x1ad/0x5c0 [ 49.763399] [<00000000228340be>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 49.763506] Code: b2 81 e6 ff e9 b3 77 00 00 e8 b8 4d d4 ff 48 8b 84 24 f8 00 00 00 48 8d 78 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 bc 96 00 00 48 8b 84 24 f8 00 00 00 4c 8b 68 [ 49.763515] RIP [<0000000043fc37a7>] __blockdev_direct_IO+0x1c55/0xd370 [ 49.763517] RSP [ 49.764314] ---[ end trace 5773b848c9d16563 ]--- [ 49.764319] Kernel panic - not syncing: Fatal exception [ 49.770144] Kernel Offset: disabled [ 49.855896] Rebooting in 86400 seconds..