[....] 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. [ 28.144570] kauditd_printk_skb: 7 callbacks suppressed [ 28.144581] audit: type=1800 audit(1542388974.445:29): pid=5825 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 28.172443] audit: type=1800 audit(1542388974.445:30): pid=5825 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.510546] IPVS: ftp: loaded support on port[0] = 21 [ 36.722251] WARNING: CPU: 1 PID: 5981 at fs/fuse/inode.c:119 fuse_destroy_inode+0x251/0x2c0 [ 36.730811] Kernel panic - not syncing: panic_on_warn set ... [ 36.736683] CPU: 1 PID: 5981 Comm: syz-executor101 Not tainted 4.20.0-rc2+ #240 [ 36.744110] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.753443] Call Trace: [ 36.756024] dump_stack+0x244/0x39d [ 36.759637] ? dump_stack_print_info.cold.1+0x20/0x20 [ 36.764815] panic+0x2ad/0x55c [ 36.767998] ? add_taint.cold.5+0x16/0x16 [ 36.772135] ? __warn.cold.8+0x5/0x45 [ 36.775921] ? __warn+0xe8/0x1d0 [ 36.779273] ? fuse_destroy_inode+0x251/0x2c0 [ 36.783749] __warn.cold.8+0x20/0x45 [ 36.787445] ? rcu_softirq_qs+0x20/0x20 [ 36.791411] ? fuse_destroy_inode+0x251/0x2c0 [ 36.795893] report_bug+0x254/0x2d0 [ 36.799508] do_error_trap+0x11b/0x200 [ 36.803380] do_invalid_op+0x36/0x40 [ 36.807078] ? fuse_destroy_inode+0x251/0x2c0 [ 36.811558] invalid_op+0x14/0x20 [ 36.814994] RIP: 0010:fuse_destroy_inode+0x251/0x2c0 [ 36.820081] Code: 41 c6 44 15 00 f8 0f 84 8c fe ff ff e8 c8 f2 f2 fe 0f 0b e9 80 fe ff ff 48 89 df e8 b9 3f 36 ff e9 50 fe ff ff e8 af f2 f2 fe <0f> 0b e9 6a ff ff ff e8 e3 3f 36 ff e9 90 fe ff ff e8 29 5a bc fe [ 36.838963] RSP: 0018:ffff8881bd8f67c8 EFLAGS: 00010293 [ 36.844309] RAX: ffff8881c2878140 RBX: ffff8881b216b5c0 RCX: 1ffff11037b1ecfe [ 36.851560] RDX: 0000000000000000 RSI: ffffffff828c9531 RDI: 0000000000000003 [ 36.858813] RBP: ffff8881bd8f6898 R08: ffff8881c2878140 R09: 0000000000000008 [ 36.866062] R10: 0000000000000002 R11: ffff8881c2878140 R12: 1ffff11037b1ecfa [ 36.873313] R13: 1ffff11037b1ecfe R14: ffff8881bd8f6870 R15: ffff8881b216b998 [ 36.880575] ? fuse_destroy_inode+0x251/0x2c0 [ 36.885055] ? fuse_destroy_inode+0x251/0x2c0 [ 36.889532] ? fuse_evict_inode+0x1e0/0x1e0 [ 36.893839] ? evict+0x5d8/0x980 [ 36.897276] ? lock_downgrade+0x900/0x900 [ 36.901414] ? fuse_evict_inode+0x1e0/0x1e0 [ 36.905719] destroy_inode+0x159/0x200 [ 36.909589] ? __destroy_inode+0x820/0x820 [ 36.913808] ? fuse_queue_forget+0x138/0x190 [ 36.918228] evict+0x5e0/0x980 [ 36.921411] ? destroy_inode+0x200/0x200 [ 36.925455] ? iput+0x671/0xa90 [ 36.928720] ? lock_downgrade+0x900/0x900 [ 36.932856] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 36.938385] ? kasan_check_read+0x11/0x20 [ 36.942518] ? do_raw_spin_trylock+0x270/0x270 [ 36.947083] ? find_held_lock+0x36/0x1c0 [ 36.951126] iput+0x679/0xa90 [ 36.954218] ? inode_add_lru+0x2a0/0x2a0 [ 36.958263] ? d_walk+0x797/0xc70 [ 36.961786] ? kasan_check_read+0x11/0x20 [ 36.965929] ? do_raw_spin_unlock+0xa7/0x330 [ 36.970318] ? do_raw_spin_trylock+0x270/0x270 [ 36.974885] ? print_usage_bug+0xc0/0xc0 [ 36.978930] ? do_raw_spin_unlock+0xa7/0x330 [ 36.983327] dentry_unlink_inode+0x461/0x5e0 [ 36.987719] ? d_lru_del+0x130/0x130 [ 36.991503] ? zap_class+0x640/0x640 [ 36.995196] ? d_walk+0x797/0xc70 [ 36.998636] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.004188] ? lockref_mark_dead+0xef/0x170 [ 37.008525] ? lockref_get_not_dead+0x90/0x90 [ 37.013448] ? lock_acquire+0x1ed/0x520 [ 37.017410] __dentry_kill+0x44c/0x7a0 [ 37.021280] ? d_drop+0x70/0x70 [ 37.024551] ? lock_downgrade+0x900/0x900 [ 37.028680] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 37.033594] ? kasan_check_read+0x11/0x20 [ 37.037727] dentry_kill+0xc9/0x680 [ 37.041342] dput.part.25+0x660/0x860 [ 37.045129] ? shrink_dcache_sb+0x350/0x350 [ 37.049439] do_one_tree+0x37/0x40 [ 37.052967] shrink_dcache_for_umount+0xc7/0x2b0 [ 37.057705] ? lock_downgrade+0x900/0x900 [ 37.061840] ? d_set_mounted+0x2e0/0x2e0 [ 37.065882] ? lock_release+0xa00/0xa00 [ 37.069842] ? perf_trace_sched_process_exec+0x860/0x860 [ 37.075274] ? unregister_shrinker+0x270/0x460 [ 37.079842] generic_shutdown_super+0xd5/0x530 [ 37.084411] ? destroy_super_rcu+0x210/0x210 [ 37.088800] ? up_write+0x7b/0x220 [ 37.092324] ? down_write_nested+0x130/0x130 [ 37.096715] ? down_read+0x120/0x120 [ 37.100498] ? prepare_kswapd_sleep+0x220/0x220 [ 37.105156] kill_anon_super+0x3e/0x60 [ 37.109028] fuse_kill_sb_anon+0x1d/0x20 [ 37.113073] deactivate_locked_super+0x97/0x100 [ 37.117734] deactivate_super+0x2bb/0x320 [ 37.121870] ? get_super_exclusive_thawed+0x20/0x20 [ 37.126873] ? fsnotify_destroy_marks+0x1d2/0x270 [ 37.131720] ? shrink_dcache_sb+0x350/0x350 [ 37.136028] ? cpumask_next+0x41/0x50 [ 37.139811] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 37.144813] ? mnt_get_writers.isra.26+0xf8/0x150 [ 37.149643] cleanup_mnt+0xbf/0x160 [ 37.153275] __cleanup_mnt+0x16/0x20 [ 37.156973] task_work_run+0x1e8/0x2a0 [ 37.160847] ? task_work_cancel+0x240/0x240 [ 37.165151] ? switch_task_namespaces+0xb8/0xd0 [ 37.169808] do_exit+0x1ad6/0x26d0 [ 37.173339] ? mm_update_next_owner+0x990/0x990 [ 37.177998] ? print_usage_bug+0xc0/0xc0 [ 37.182044] ? zap_class+0x640/0x640 [ 37.185765] ? find_held_lock+0x36/0x1c0 [ 37.189822] ? __lock_acquire+0x62f/0x4c20 [ 37.194038] ? lock_downgrade+0x900/0x900 [ 37.198175] ? mark_held_locks+0x130/0x130 [ 37.202394] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 37.207569] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 37.212652] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.218171] ? futex_wait+0x5ec/0xa50 [ 37.221960] ? futex_wait_setup+0x3e0/0x3e0 [ 37.226289] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 37.231466] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 37.236565] ? futex_wake+0x304/0x760 [ 37.240367] ? depot_save_stack+0x292/0x470 [ 37.244676] ? zap_class+0x640/0x640 [ 37.248379] ? memset+0x31/0x40 [ 37.251648] ? find_held_lock+0x36/0x1c0 [ 37.255697] ? get_signal+0x95b/0x1980 [ 37.259575] ? _raw_spin_unlock_irq+0x27/0x80 [ 37.264048] ? _raw_spin_unlock_irq+0x27/0x80 [ 37.268548] do_group_exit+0x177/0x440 [ 37.272424] ? trace_hardirqs_off_caller+0x310/0x310 [ 37.277510] ? __ia32_sys_exit+0x50/0x50 [ 37.281560] get_signal+0x8b0/0x1980 [ 37.285258] ? ptrace_notify+0x130/0x130 [ 37.289301] ? filename_lookup+0x39f/0x520 [ 37.293520] ? filename_parentat.isra.56+0x570/0x570 [ 37.298903] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.304435] ? digsig_verify+0x1530/0x1530 [ 37.308658] do_signal+0x9c/0x21c0 [ 37.312201] ? getname_flags+0x26e/0x590 [ 37.316249] ? user_path_at_empty+0x40/0x50 [ 37.320553] ? setup_sigcontext+0x7d0/0x7d0 [ 37.324857] ? vfs_statx+0x17a/0x210 [ 37.328561] ? exit_to_usermode_loop+0x8c/0x380 [ 37.333213] ? exit_to_usermode_loop+0x8c/0x380 [ 37.337872] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 37.342437] ? trace_hardirqs_on+0xbd/0x310 [ 37.346757] ? do_fast_syscall_32+0xcd5/0xfb2 [ 37.351236] ? fput+0x130/0x1a0 [ 37.354496] ? do_fast_syscall_32+0x150/0xfb2 [ 37.358974] exit_to_usermode_loop+0x2e5/0x380 [ 37.363557] ? __bpf_trace_sys_exit+0x30/0x30 [ 37.368043] do_fast_syscall_32+0xcd5/0xfb2 [ 37.372355] ? do_int80_syscall_32+0x890/0x890 [ 37.376925] ? entry_SYSENTER_compat+0x68/0x7f [ 37.381490] ? trace_hardirqs_off_caller+0xbb/0x310 [ 37.386491] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.391319] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.396325] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.401503] ? post_copy_siginfo_from_user.isra.25.part.26+0x250/0x250 [ 37.408151] ? __switch_to_asm+0x40/0x70 [ 37.412191] ? __switch_to_asm+0x34/0x70 [ 37.416248] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.421076] entry_SYSENTER_compat+0x70/0x7f [ 37.425467] RIP: 0023:0xf7fb4a29 [ 37.428828] Code: Bad RIP value. [ 37.432189] RSP: 002b:00000000f7f8f1ec EFLAGS: 00000296 ORIG_RAX: 00000000000000f0 [ 37.439881] RAX: fffffffffffffe00 RBX: 00000000080fb018 RCX: 0000000000000080 [ 37.447136] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000780 [ 37.454409] RBP: 00000000200007c0 R08: 0000000000000000 R09: 0000000000000000 [ 37.461662] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 37.468920] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 37.477422] Kernel Offset: disabled [ 37.481102] Rebooting in 86400 seconds..