INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.24' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.400712] IPVS: ftp: loaded support on port[0] = 21 [ 42.428851] hfs: unable to locate alternate MDB [ 42.433626] hfs: continuing without an alternate MDB [ 42.455973] ------------[ cut here ]------------ [ 42.460815] kernel BUG at fs/hfs/inode.c:441! [ 42.465504] invalid opcode: 0000 [#1] SMP KASAN [ 42.470150] Dumping ftrace buffer: [ 42.473663] (ftrace buffer empty) [ 42.477343] Modules linked in: [ 42.480512] CPU: 1 PID: 22 Comm: kworker/u4:1 Not tainted 4.16.0+ #11 [ 42.487058] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.496402] Workqueue: writeback wb_workfn (flush-7:0) [ 42.501658] RIP: 0010:hfs_write_inode+0xe6/0xc50 [ 42.506383] RSP: 0018:ffff8801d9466780 EFLAGS: 00010293 [ 42.511715] RAX: ffff8801d945a5c0 RBX: 1ffff1003b28ccf4 RCX: ffffffff820f97f6 [ 42.518956] RDX: 0000000000000000 RSI: ffff8801d9466de8 RDI: ffff8801d97b4740 [ 42.526201] RBP: ffff8801d94668e8 R08: ffffed003b6246c3 R09: ffffed003b6246c3 [ 42.533444] R10: 0000000000000001 R11: ffffed003b6246c2 R12: ffff8801d97b4700 [ 42.540697] R13: 0000000000000000 R14: ffff8801d94668c0 R15: 0000000000000000 [ 42.547938] FS: 0000000000000000(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 [ 42.556149] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.561999] CR2: 00007f233bf15000 CR3: 000000000846a003 CR4: 00000000001606e0 [ 42.569241] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.576489] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.583730] Call Trace: [ 42.586287] ? trace_hardirqs_off+0x10/0x10 [ 42.590577] ? hfs_inode_write_fork+0x1e0/0x1e0 [ 42.595218] ? __writeback_single_inode+0x524/0x1250 [ 42.600293] ? lock_downgrade+0x980/0x980 [ 42.604411] ? __lock_is_held+0xb6/0x140 [ 42.608446] __writeback_single_inode+0x9d0/0x1250 [ 42.613349] ? __mark_inode_dirty+0x1170/0x1170 [ 42.617990] ? __lock_acquire+0x638/0x3c30 [ 42.622194] ? find_held_lock+0x35/0x1d0 [ 42.626225] ? find_held_lock+0x35/0x1d0 [ 42.630258] ? wbc_attach_and_unlock_inode+0x1a8/0x900 [ 42.635504] ? lock_downgrade+0x980/0x980 [ 42.639624] ? find_held_lock+0x138/0x1d0 [ 42.643750] ? kasan_check_read+0x11/0x20 [ 42.647869] ? do_raw_spin_unlock+0x9e/0x310 [ 42.652247] ? do_raw_spin_trylock+0x1a0/0x1a0 [ 42.656810] ? lock_downgrade+0x980/0x980 [ 42.660928] ? _raw_spin_unlock+0x22/0x30 [ 42.665045] ? wbc_attach_and_unlock_inode+0x1ad/0x900 [ 42.670292] ? do_raw_spin_trylock+0x1a0/0x1a0 [ 42.674844] ? __writeback_single_inode+0x1250/0x1250 [ 42.680004] ? kasan_check_write+0x14/0x20 [ 42.684206] ? do_raw_spin_lock+0xc1/0x230 [ 42.688410] writeback_sb_inodes+0x688/0xff0 [ 42.692789] ? wbc_detach_inode+0x880/0x880 [ 42.697081] ? move_expired_inodes+0xd50/0xd50 [ 42.701633] ? trace_hardirqs_off+0x10/0x10 [ 42.705923] ? lock_acquire+0x1d5/0x580 [ 42.709864] ? lock_acquire+0x1d5/0x580 [ 42.713809] ? wb_writeback+0x1f0/0xdb0 [ 42.717756] wb_writeback+0x444/0xdb0 [ 42.721527] ? writeback_inodes_wb.constprop.59+0x340/0x340 [ 42.727210] ? __update_load_avg_se.isra.31+0x56a/0x7c0 [ 42.732544] ? __update_load_avg_se.isra.31+0x56a/0x7c0 [ 42.737879] ? trace_hardirqs_off+0x10/0x10 [ 42.742171] ? string+0x180/0x200 [ 42.745600] ? print_irqtrace_events+0x270/0x270 [ 42.750325] ? find_held_lock+0x35/0x1d0 [ 42.754354] ? trace_hardirqs_off+0x10/0x10 [ 42.758648] ? wb_workfn+0x46e/0x15a0 [ 42.762416] ? lock_downgrade+0x980/0x980 [ 42.766536] wb_workfn+0x2c6/0x15a0 [ 42.770131] ? wb_workfn+0x2c6/0x15a0 [ 42.773902] ? __lock_acquire+0x638/0x3c30 [ 42.778106] ? inode_wait_for_writeback+0x40/0x40 [ 42.782918] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 42.788079] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 42.793241] ? kasan_check_read+0x11/0x20 [ 42.797363] ? rcu_is_watching+0x85/0x130 [ 42.801482] ? rcu_report_exp_cpu_mult+0x480/0x480 [ 42.806382] ? trace_hardirqs_off+0x10/0x10 [ 42.810671] ? trace_hardirqs_off+0x10/0x10 [ 42.814965] ? update_curr+0x4d5/0xbb0 [ 42.818822] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 42.823981] ? find_held_lock+0x35/0x1d0 [ 42.828011] ? trace_hardirqs_off+0x10/0x10 [ 42.832303] ? debug_object_deactivate+0x364/0x560 [ 42.837201] ? lock_downgrade+0x980/0x980 [ 42.841319] ? lock_release+0xa40/0xa40 [ 42.845275] ? find_held_lock+0x35/0x1d0 [ 42.849306] ? trace_hardirqs_off+0x10/0x10 [ 42.853606] ? lock_acquire+0x1d5/0x580 [ 42.857551] ? lock_acquire+0x1d5/0x580 [ 42.861497] ? process_one_work+0xbd9/0x1c40 [ 42.865886] ? __lock_is_held+0xb6/0x140 [ 42.869918] process_one_work+0xc97/0x1c40 [ 42.874122] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 42.879281] ? trace_hardirqs_on+0xd/0x10 [ 42.883399] ? pwq_dec_nr_in_flight+0x470/0x470 [ 42.888051] ? __schedule+0x903/0x1ef0 [ 42.891914] ? switched_from_fair+0x10/0x10 [ 42.896209] ? trace_hardirqs_off+0x10/0x10 [ 42.900500] ? find_held_lock+0x35/0x1d0 [ 42.904536] ? lock_acquire+0x1d5/0x580 [ 42.908479] ? lock_acquire+0x1d5/0x580 [ 42.912422] ? worker_thread+0x40e/0x1380 [ 42.916551] ? lock_downgrade+0x980/0x980 [ 42.920673] ? lock_release+0xa40/0xa40 [ 42.924619] ? kasan_check_read+0x11/0x20 [ 42.928738] ? do_raw_spin_trylock+0x1a0/0x1a0 [ 42.933295] worker_thread+0x1c3/0x1380 [ 42.937242] ? process_one_work+0x1c40/0x1c40 [ 42.941714] ? trace_hardirqs_off+0x10/0x10 [ 42.946008] ? find_held_lock+0x35/0x1d0 [ 42.950039] ? find_held_lock+0x35/0x1d0 [ 42.954072] ? find_held_lock+0x35/0x1d0 [ 42.958102] ? complete+0x62/0x80 [ 42.961526] ? schedule+0xf5/0x430 [ 42.965037] ? __schedule+0x1ef0/0x1ef0 [ 42.968977] ? do_raw_spin_unlock+0x9e/0x310 [ 42.973354] ? do_raw_spin_trylock+0x1a0/0x1a0 [ 42.977905] ? _raw_spin_unlock_irqrestore+0x31/0xc0 [ 42.982978] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.987971] ? trace_hardirqs_on+0xd/0x10 [ 42.992091] ? __kthread_parkme+0x176/0x240 [ 42.996391] kthread+0x33c/0x400 [ 42.999737] ? process_one_work+0x1c40/0x1c40 [ 43.004202] ? kthread_stop+0x7c0/0x7c0 [ 43.008144] ret_from_fork+0x3a/0x50 [ 43.011824] Code: 0f 0f 87 ff 00 00 00 e8 09 91 61 ff 49 83 ff 03 0f 84 58 06 00 00 49 83 ff 04 74 11 49 83 ff 02 0f 84 e0 00 00 00 e8 ea 90 61 ff <0f> 0b e8 e3 90 61 ff 49 8d 7c 24 28 48 b8 00 00 00 00 00 fc ff [ 43.031690] RIP: hfs_write_inode+0xe6/0xc50 RSP: ffff8801d9466780 [ 43.038039] ---[ end trace 58207cc73dd7e339 ]--- [ 43.042788] Kernel panic - not syncing: Fatal exception [ 43.048503] Dumping ftrace buffer: [ 43.052014] (ftrace buffer empty) [ 43.055695] Kernel Offset: disabled [ 43.059291] Rebooting in 86400 seconds..