[info] Using makefile-style concurrent boot in runlevel 2.
[   24.208729] audit: type=1800 audit(1538562583.300:21): pid=5201 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 '10.128.0.52' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   38.642110] kasan: CONFIG_KASAN_INLINE enabled
[   38.646780] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   38.654203] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   38.660443] CPU: 1 PID: 5357 Comm: syz-executor405 Not tainted 4.19.0-rc5+ #241
[   38.667888] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   38.677240] RIP: 0010:rb_erase+0x306/0x3710
[   38.681545] Code: c7 81 28 01 00 00 f2 f2 f2 f2 c7 81 2c 01 00 00 00 f2 f2 f2 48 89 f9 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db 48 c1 e9 03 <42> 80 3c 01 00 0f 85 41 1c 00 00 4c 8d 48 10 4c 8b 78 08 48 b9 00
[   38.700429] RSP: 0018:ffff8801bb0e6918 EFLAGS: 00010202
[   38.705772] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   38.713036] RDX: 1ffff1003761cd2b RSI: ffffffff8afc18a0 RDI: 0000000000000008
[   38.720289] RBP: ffff8801bb0e7320 R08: dffffc0000000000 R09: fffffbfff12d6a90
[   38.727538] R10: fffffbfff12d6a90 R11: ffffffff896b5483 R12: ffff8801c380a2b0
[   38.734806] R13: dffffc0000000000 R14: ffff8801bb0e72f8 R15: ffff8801bb0e7438
[   38.742076] FS:  00000000014b1880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
[   38.750284] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   38.756144] CR2: 0000000020000080 CR3: 00000001d9570000 CR4: 00000000001406e0
[   38.763401] Call Trace:
[   38.765975]  ? lockdep_on+0x50/0x50
[   38.769588]  ? rb_insert_color+0x1460/0x1460
[   38.773981]  ? noop_count+0x40/0x40
[   38.777599]  ? lock_pin_lock+0x350/0x350
[   38.781648]  ? noop_count+0x40/0x40
[   38.785257]  ? kasan_check_read+0x11/0x20
[   38.789386]  ? noop_count+0x40/0x40
[   38.793005]  ? noop_count+0x40/0x40
[   38.796615]  ? lock_pin_lock+0x350/0x350
[   38.800670]  ? mark_held_locks+0x130/0x130
[   38.804898]  ? check_usage_forwards+0x3e0/0x3e0
[   38.809555]  ? __bfs+0x385/0x7a0
[   38.812904]  ? noop_count+0x40/0x40
[   38.816517]  ? check_usage+0x1a9/0x790
[   38.820421]  ? lock_pin_lock+0x350/0x350
[   38.824466]  ? check_usage_forwards+0x3e0/0x3e0
[   38.829115]  ? __bfs+0x385/0x7a0
[   38.832467]  ? __lock_acquire+0x7ec/0x4ec0
[   38.836687]  ? lockdep_on+0x50/0x50
[   38.840295]  ? lock_pin_lock+0x350/0x350
[   38.844347]  ? mark_held_locks+0x130/0x130
[   38.848568]  ? kasan_check_read+0x11/0x20
[   38.852712]  ? __lock_acquire+0x2881/0x4ec0
[   38.857035]  ? mark_held_locks+0x130/0x130
[   38.861254]  ? print_usage_bug+0xc0/0xc0
[   38.865302]  ? _raw_spin_unlock+0x2c/0x50
[   38.869447]  ? graph_lock+0x170/0x170
[   38.873259]  ? ext4_exit_mballoc+0xc0/0xc0
[   38.877479]  ? __lock_acquire+0x7ec/0x4ec0
[   38.881715]  ? find_held_lock+0x36/0x1c0
[   38.885763]  ? mark_held_locks+0x130/0x130
[   38.889984]  ? lock_downgrade+0x900/0x900
[   38.894118]  ? ext4_es_scan+0x960/0x960
[   38.898076]  ? do_raw_write_trylock+0x1c0/0x1c0
[   38.902728]  ? kasan_check_write+0x14/0x20
[   38.906945]  ? lock_acquire+0x1ed/0x520
[   38.910907]  ? integrity_inode_free+0x77/0x320
[   38.915470]  ? ext4_es_remove_extent+0x151/0x500
[   38.920208]  ? lock_release+0x970/0x970
[   38.924165]  ? kasan_check_write+0x14/0x20
[   38.928381]  ? do_raw_write_lock+0xbd/0x1b0
[   38.932693]  integrity_inode_free+0x12f/0x320
[   38.937174]  security_inode_free+0x19/0x90
[   38.941402]  __destroy_inode+0x328/0x820
[   38.945449]  ? generic_update_time+0x450/0x450
[   38.950023]  ? evict+0x5d8/0x980
[   38.953374]  ? lock_downgrade+0x900/0x900
[   38.957514]  ? __inode_wait_for_writeback+0x2cf/0x380
[   38.962689]  destroy_inode+0xda/0x200
[   38.966501]  ? __destroy_inode+0x820/0x820
[   38.970719]  ? kasan_check_write+0x14/0x20
[   38.974950]  ? do_raw_spin_lock+0xc1/0x200
[   38.979167]  evict+0x5e0/0x980
[   38.982357]  ? destroy_inode+0x200/0x200
[   38.986418]  ? iput+0x671/0xa90
[   38.989697]  ? lock_downgrade+0x900/0x900
[   38.993834]  ? kasan_check_read+0x11/0x20
[   38.997967]  ? do_raw_spin_trylock+0x1c0/0x1c0
[   39.002532]  ? lock_downgrade+0x900/0x900
[   39.006661]  iput+0x679/0xa90
[   39.009749]  ? inode_add_lru+0x2a0/0x2a0
[   39.013794]  ? up_write+0x7b/0x220
[   39.017316]  ? up_read+0x110/0x110
[   39.020851]  ? up_read+0x110/0x110
[   39.024373]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   39.029917]  ? check_preemption_disabled+0x48/0x200
[   39.034934]  ext4_ioctl+0x236f/0x4210
[   39.038720]  ? is_bpf_text_address+0xac/0x170
[   39.043202]  ? ext4_ioctl_group_add+0x560/0x560
[   39.047869]  ? rcu_read_unlock_special.part.39+0x11f0/0x11f0
[   39.053670]  ? kasan_check_read+0x11/0x20
[   39.057801]  ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160
[   39.063063]  ? rcu_bh_qs+0xc0/0xc0
[   39.066587]  ? rcu_bh_qs+0xc0/0xc0
[   39.070108]  ? unwind_dump+0x190/0x190
[   39.073982]  ? is_bpf_text_address+0xd3/0x170
[   39.078469]  ? kernel_text_address+0x79/0xf0
[   39.082900]  ? __kernel_text_address+0xd/0x40
[   39.087416]  ? unwind_get_return_address+0x61/0xa0
[   39.092348]  ? __save_stack_trace+0x8d/0xf0
[   39.096655]  ? save_stack+0xa9/0xd0
[   39.100265]  ? save_stack+0x43/0xd0
[   39.103888]  ? __kasan_slab_free+0x102/0x150
[   39.108282]  ? kasan_slab_free+0xe/0x10
[   39.112240]  ? kmem_cache_free+0x83/0x290
[   39.116388]  ? putname+0xf2/0x130
[   39.119834]  ? do_sys_open+0x54d/0x700
[   39.123704]  ? __x64_sys_openat+0x9d/0x100
[   39.127927]  ? do_syscall_64+0x1b9/0x820
[   39.131976]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   39.137339]  ? trace_hardirqs_off+0xb8/0x310
[   39.141730]  ? kasan_check_read+0x11/0x20
[   39.145874]  ? do_raw_spin_unlock+0xa7/0x2f0
[   39.150299]  ? trace_hardirqs_on+0x310/0x310
[   39.154688]  ? kasan_check_write+0x14/0x20
[   39.158914]  ? trace_hardirqs_off+0xb8/0x310
[   39.163305]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   39.168830]  ? check_preemption_disabled+0x48/0x200
[   39.173853]  ? check_preemption_disabled+0x48/0x200
[   39.178873]  ? ext4_ioctl_group_add+0x560/0x560
[   39.183577]  do_vfs_ioctl+0x1de/0x1720
[   39.187465]  ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160
[   39.192744]  ? ioctl_preallocate+0x300/0x300
[   39.197136]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   39.202656]  ? __fget_light+0x2e9/0x430
[   39.206639]  ? fget_raw+0x20/0x20
[   39.210073]  ? putname+0xf2/0x130
[   39.213509]  ? rcu_read_lock_sched_held+0x108/0x120
[   39.218512]  ? kmem_cache_free+0x24f/0x290
[   39.222749]  ? putname+0xf7/0x130
[   39.226187]  ? do_syscall_64+0x9a/0x820
[   39.230165]  ? do_syscall_64+0x9a/0x820
[   39.234124]  ? lockdep_hardirqs_on+0x421/0x5c0
[   39.238690]  ? security_file_ioctl+0x94/0xc0
[   39.243093]  ksys_ioctl+0xa9/0xd0
[   39.246528]  __x64_sys_ioctl+0x73/0xb0
[   39.250423]  do_syscall_64+0x1b9/0x820
[   39.254309]  ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[   39.259685]  ? syscall_return_slowpath+0x5e0/0x5e0
[   39.264598]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   39.269426]  ? trace_hardirqs_on_caller+0x310/0x310
[   39.274426]  ? prepare_exit_to_usermode+0x3b0/0x3b0
[   39.279438]  ? prepare_exit_to_usermode+0x291/0x3b0
[   39.284771]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   39.289601]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   39.294770] RIP: 0033:0x4400d9
[   39.297961] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
[   39.316871] RSP: 002b:00007fffad25b258 EFLAGS: 00000213 ORIG_RAX: 0000000000000010
[   39.324572] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400d9
[   39.331825] RDX: 0000000020000040 RSI: 0000000000006611 RDI: 0000000000000003
[   39.339082] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   39.346343] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401960
[   39.353608] R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000
[   39.360865] Modules linked in:
[   39.364186] ---[ end trace 507065440f5cd69f ]---
[   39.368975] RIP: 0010:rb_erase+0x306/0x3710
[   39.373304] Code: c7 81 28 01 00 00 f2 f2 f2 f2 c7 81 2c 01 00 00 00 f2 f2 f2 48 89 f9 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db 48 c1 e9 03 <42> 80 3c 01 00 0f 85 41 1c 00 00 4c 8d 48 10 4c 8b 78 08 48 b9 00
[   39.392234] RSP: 0018:ffff8801bb0e6918 EFLAGS: 00010202
[   39.397601] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   39.404909] RDX: 1ffff1003761cd2b RSI: ffffffff8afc18a0 RDI: 0000000000000008
[   39.412224] RBP: ffff8801bb0e7320 R08: dffffc0000000000 R09: fffffbfff12d6a90
[   39.419512] R10: fffffbfff12d6a90 R11: ffffffff896b5483 R12: ffff8801c380a2b0
[   39.426795] R13: dffffc0000000000 R14: ffff8801bb0e72f8 R15: ffff8801bb0e7438
[   39.434082] FS:  00000000014b1880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
[   39.442322] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   39.448192] CR2: 0000000020000080 CR3: 00000001d9570000 CR4: 00000000001406e0
[   39.455505] Kernel panic - not syncing: Fatal exception
[   39.461829] Kernel Offset: disabled
[   39.465451] Rebooting in 86400 seconds..