[info] Using makefile-style concurrent boot in runlevel 2. [ 25.770677] audit: type=1800 audit(1541640210.186:21): pid=5556 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [....] 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 '10.128.0.73' (ECDSA) to the list of known hosts. syzkaller login: [ 53.844246] IPVS: ftp: loaded support on port[0] = 21 executing program [ 53.894965] kasan: CONFIG_KASAN_INLINE enabled [ 53.899616] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 53.907409] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 53.913655] CPU: 1 PID: 5714 Comm: syz-executor074 Not tainted 4.20.0-rc1-next-20181107+ #107 [ 53.922304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.931746] RIP: 0010:locks_remove_flock+0x216/0x350 [ 53.936848] Code: 00 0f 85 3a 01 00 00 48 8b 5b 98 48 85 db 74 3a e8 1f 41 92 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 17 01 00 00 48 8b 5b 08 48 85 db 74 0d e8 f2 40 [ 53.955739] RSP: 0018:ffff8801d7017880 EFLAGS: 00010202 [ 53.961088] RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: ffffffff81ed555d [ 53.968346] RDX: 000000000836b157 RSI: ffffffff81ed5c71 RDI: 0000000041b58abb [ 53.975656] RBP: ffff8801d7017a60 R08: ffff8801d49ae540 R09: ffffed003b5e5b67 [ 53.982960] R10: ffffed003b5e5b67 R11: ffff8801daf2db3b R12: ffff8801d8b977c0 [ 53.990226] R13: ffff8801d70178f8 R14: 1ffff1003ae02f13 R15: dffffc0000000000 [ 53.997486] FS: 0000000001c82880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 54.005705] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.011580] CR2: 00000000006cd090 CR3: 00000001d7081000 CR4: 00000000001406e0 [ 54.018835] Call Trace: [ 54.021414] ? flock_lock_inode+0x11c0/0x11c0 [ 54.025897] ? mark_held_locks+0x130/0x130 [ 54.030120] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.035640] ? __call_rcu.constprop.55+0x3ea/0x950 [ 54.040606] ? __call_rcu.constprop.55+0x3ea/0x950 [ 54.045526] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 54.050266] ? trace_hardirqs_on+0xbd/0x310 [ 54.054589] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 54.059857] ? call_rcu+0xb/0x10 [ 54.063218] ? trace_hardirqs_off_caller+0x300/0x300 [ 54.068318] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 54.073852] ? locks_remove_posix+0x486/0x850 [ 54.078340] ? check_preemption_disabled+0x48/0x280 [ 54.083355] ? vfs_lock_file+0xe0/0xe0 [ 54.087241] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.092784] locks_remove_file+0x148/0x5c0 [ 54.097019] ? fcntl_setlk+0xfc0/0xfc0 [ 54.100915] ? fsnotify_first_mark+0x350/0x350 [ 54.105505] ? __fsnotify_parent+0xcc/0x420 [ 54.109829] ? perf_trace_sched_process_exec+0x860/0x860 [ 54.115280] ? fsnotify+0xf20/0xf20 [ 54.118910] ? __might_sleep+0x95/0x190 [ 54.122875] __fput+0x2f0/0xa70 [ 54.126147] ? get_max_files+0x20/0x20 [ 54.130097] ? trace_hardirqs_on+0xbd/0x310 [ 54.134415] ? kasan_check_read+0x11/0x20 [ 54.138589] ? task_work_run+0x1af/0x2a0 [ 54.142663] ? trace_hardirqs_off_caller+0x300/0x300 [ 54.147867] ? filp_close+0x1cd/0x250 [ 54.151661] ____fput+0x15/0x20 [ 54.154933] task_work_run+0x1e8/0x2a0 [ 54.158817] ? task_work_cancel+0x240/0x240 [ 54.163133] ? copy_fd_bitmaps+0x210/0x210 [ 54.167357] ? do_syscall_64+0x9a/0x820 [ 54.171444] exit_to_usermode_loop+0x318/0x380 [ 54.176021] ? __bpf_trace_sys_exit+0x30/0x30 [ 54.180506] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.186030] do_syscall_64+0x6be/0x820 [ 54.189907] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 54.195366] ? syscall_return_slowpath+0x5e0/0x5e0 [ 54.200287] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 54.205182] ? trace_hardirqs_on_caller+0x310/0x310 [ 54.210194] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 54.215203] ? prepare_exit_to_usermode+0x291/0x3b0 [ 54.220211] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 54.225048] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.230230] RIP: 0033:0x4018f0 [ 54.233409] Code: 01 f0 ff ff 0f 83 d0 0a 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d dd 2d 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 a4 0a 00 00 c3 48 83 ec 08 e8 5a 01 00 00 [ 54.252344] RSP: 002b:00007ffd421ba508 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 54.260043] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004018f0 [ 54.267299] RDX: 0000000000441aa9 RSI: 0000000000000006 RDI: 0000000000000004 [ 54.274564] RBP: 0000000000000000 R08: 0000000000000100 R09: 0000000000000100 [ 54.281822] R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000 [ 54.289081] R13: 00000000004028b0 R14: 0000000000000000 R15: 0000000000000000 [ 54.296343] Modules linked in: [ 54.300111] ---[ end trace 16bc33bf1b2c45f5 ]--- [ 54.304943] RIP: 0010:locks_remove_flock+0x216/0x350 [ 54.310051] Code: 00 0f 85 3a 01 00 00 48 8b 5b 98 48 85 db 74 3a e8 1f 41 92 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 17 01 00 00 48 8b 5b 08 48 85 db 74 0d e8 f2 40 [ 54.329144] RSP: 0018:ffff8801d7017880 EFLAGS: 00010202 [ 54.334690] RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: ffffffff81ed555d [ 54.341950] RDX: 000000000836b157 RSI: ffffffff81ed5c71 RDI: 0000000041b58abb [ 54.349254] RBP: ffff8801d7017a60 R08: ffff8801d49ae540 R09: ffffed003b5e5b67 [ 54.356545] R10: ffffed003b5e5b67 R11: ffff8801daf2db3b R12: ffff8801d8b977c0 [ 54.363856] R13: ffff8801d70178f8 R14: 1ffff1003ae02f13 R15: dffffc0000000000 [ 54.371193] FS: 0000000001c82880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 54.379515] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.385442] CR2: 00000000006cd090 CR3: 00000001d7081000 CR4: 00000000001406e0 [ 54.392755] Kernel panic - not syncing: Fatal exception [ 54.399127] Kernel Offset: disabled [ 54.402753] Rebooting in 86400 seconds..