[info] Using makefile-style concurrent boot in runlevel 2.
[   25.319552] audit: type=1800 audit(1539952521.763:21): pid=5222 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

syzkaller login: [   37.973058] sshd (5364) used greatest stack depth: 15976 bytes left
Warning: Permanently added '10.128.0.6' (ECDSA) to the list of known hosts.
executing program
[   44.506811] kasan: CONFIG_KASAN_INLINE enabled
[   44.511641] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   44.519042] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   44.525275] CPU: 0 PID: 5379 Comm: syz-executor423 Not tainted 4.19.0-rc8+ #291
[   44.532700] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.542042] RIP: 0010:rb_erase+0x306/0x3710
[   44.546354] 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
[   44.565243] RSP: 0018:ffff8801bb356918 EFLAGS: 00010202
[   44.570600] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   44.577860] RDX: 1ffff1003766ad2b RSI: ffffffff8afbc860 RDI: 0000000000000008
[   44.585108] RBP: ffff8801bb357320 R08: dffffc0000000000 R09: fffffbfff12d6990
[   44.592357] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b7722970
[   44.599605] R13: dffffc0000000000 R14: ffff8801bb3572f8 R15: ffff8801bb357438
[   44.606861] FS:  0000000001531880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
[   44.615068] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   44.620929] CR2: 0000000020000080 CR3: 00000001d8e93000 CR4: 00000000001406f0
[   44.628183] Call Trace:
[   44.630755]  ? lockdep_on+0x50/0x50
[   44.634366]  ? rb_insert_color+0x1460/0x1460
[   44.638757]  ? noop_count+0x40/0x40
[   44.642370]  ? lock_pin_lock+0x350/0x350
[   44.646420]  ? rcu_bh_qs+0xc0/0xc0
[   44.649944]  ? unwind_dump+0x190/0x190
[   44.653819]  ? kasan_check_read+0x11/0x20
[   44.657951]  ? __lock_acquire+0x2881/0x4ec0
[   44.662258]  ? noop_count+0x40/0x40
[   44.665931]  ? lock_pin_lock+0x350/0x350
[   44.669983]  ? mark_held_locks+0x130/0x130
[   44.674199]  ? check_usage_forwards+0x3e0/0x3e0
[   44.678847]  ? __bfs+0x385/0x7a0
[   44.682204]  ? check_usage+0x1a9/0x790
[   44.686079]  ? lock_pin_lock+0x350/0x350
[   44.690122]  ? check_usage_forwards+0x3e0/0x3e0
[   44.694772]  ? __bfs+0x385/0x7a0
[   44.698189]  ? modules_open+0xa0/0xa0
[   44.701974]  ? lockdep_on+0x50/0x50
[   44.705580]  ? lock_pin_lock+0x350/0x350
[   44.709626]  ? mark_held_locks+0x130/0x130
[   44.713840]  ? kasan_check_read+0x11/0x20
[   44.717980]  ? __lock_acquire+0x2881/0x4ec0
[   44.722292]  ? mark_held_locks+0x130/0x130
[   44.726507]  ? print_usage_bug+0xc0/0xc0
[   44.730547]  ? _raw_spin_unlock+0x2c/0x50
[   44.734810]  ? graph_lock+0x170/0x170
[   44.738622]  ? ext4_exit_mballoc+0xc0/0xc0
[   44.742847]  ? __lock_acquire+0x7ec/0x4ec0
[   44.747069]  ? find_held_lock+0x36/0x1c0
[   44.751191]  ? mark_held_locks+0x130/0x130
[   44.755422]  ? lock_downgrade+0x900/0x900
[   44.759552]  ? ext4_es_scan+0x960/0x960
[   44.763504]  ? lock_release+0x970/0x970
[   44.767460]  ? do_raw_write_trylock+0x1c0/0x1c0
[   44.772108]  ? kasan_check_write+0x14/0x20
[   44.776324]  ? lock_acquire+0x1ed/0x520
[   44.780283]  ? integrity_inode_free+0x77/0x320
[   44.784854]  ? ext4_es_remove_extent+0x151/0x500
[   44.789668]  ? lock_release+0x970/0x970
[   44.793639]  ? kasan_check_write+0x14/0x20
[   44.797853]  ? do_raw_write_lock+0xbd/0x1b0
[   44.802155]  integrity_inode_free+0x12f/0x320
[   44.806640]  security_inode_free+0x19/0x90
[   44.810856]  __destroy_inode+0x328/0x820
[   44.814899]  ? generic_update_time+0x450/0x450
[   44.819459]  ? evict+0x5d8/0x980
[   44.822805]  ? lock_downgrade+0x900/0x900
[   44.826935]  ? __inode_wait_for_writeback+0x2cf/0x380
[   44.832105]  destroy_inode+0xda/0x200
[   44.835897]  ? __destroy_inode+0x820/0x820
[   44.840180]  ? kasan_check_write+0x14/0x20
[   44.844408]  ? do_raw_spin_lock+0xc1/0x200
[   44.848629]  evict+0x5e0/0x980
[   44.851804]  ? destroy_inode+0x200/0x200
[   44.855847]  ? iput+0x671/0xa90
[   44.859107]  ? lock_downgrade+0x900/0x900
[   44.863392]  ? kasan_check_read+0x11/0x20
[   44.867531]  ? do_raw_spin_trylock+0x1c0/0x1c0
[   44.872102]  ? lock_downgrade+0x900/0x900
[   44.876234]  iput+0x679/0xa90
[   44.879324]  ? inode_add_lru+0x2a0/0x2a0
[   44.883370]  ? up_write+0x7b/0x220
[   44.886889]  ? up_read+0x110/0x110
[   44.890409]  ? up_read+0x110/0x110
[   44.893931]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   44.899449]  ? check_preemption_disabled+0x48/0x200
[   44.904449]  ext4_ioctl+0x236f/0x4210
[   44.908283]  ? is_bpf_text_address+0xac/0x170
[   44.912773]  ? ext4_ioctl_group_add+0x560/0x560
[   44.917464]  ? rcu_read_unlock_special.part.39+0x11f0/0x11f0
[   44.923250]  ? kasan_check_read+0x11/0x20
[   44.927429]  ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160
[   44.932693]  ? rcu_bh_qs+0xc0/0xc0
[   44.936216]  ? rcu_bh_qs+0xc0/0xc0
[   44.939737]  ? unwind_dump+0x190/0x190
[   44.943609]  ? is_bpf_text_address+0xd3/0x170
[   44.948086]  ? kernel_text_address+0x79/0xf0
[   44.952476]  ? __kernel_text_address+0xd/0x40
[   44.956953]  ? unwind_get_return_address+0x61/0xa0
[   44.961865]  ? __save_stack_trace+0x8d/0xf0
[   44.966174]  ? save_stack+0xa9/0xd0
[   44.969781]  ? save_stack+0x43/0xd0
[   44.973388]  ? __kasan_slab_free+0x102/0x150
[   44.977777]  ? kasan_slab_free+0xe/0x10
[   44.981730]  ? kmem_cache_free+0x83/0x290
[   44.985855]  ? putname+0xf2/0x130
[   44.989332]  ? do_sys_open+0x54d/0x700
[   44.993209]  ? __x64_sys_openat+0x9d/0x100
[   44.997430]  ? do_syscall_64+0x1b9/0x820
[   45.001479]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   45.006869]  ? trace_hardirqs_off+0xb8/0x310
[   45.011265]  ? kasan_check_read+0x11/0x20
[   45.015396]  ? do_raw_spin_unlock+0xa7/0x2f0
[   45.019790]  ? trace_hardirqs_on+0x310/0x310
[   45.024180]  ? kasan_check_write+0x14/0x20
[   45.028400]  ? trace_hardirqs_off+0xb8/0x310
[   45.032791]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   45.038308]  ? check_preemption_disabled+0x48/0x200
[   45.043306]  ? check_preemption_disabled+0x48/0x200
[   45.048309]  ? ext4_ioctl_group_add+0x560/0x560
[   45.052962]  do_vfs_ioctl+0x1de/0x1720
[   45.056834]  ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160
[   45.062092]  ? ioctl_preallocate+0x300/0x300
[   45.066483]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   45.072008]  ? __fget_light+0x2e9/0x430
[   45.075977]  ? fget_raw+0x20/0x20
[   45.079416]  ? putname+0xf2/0x130
[   45.082849]  ? rcu_read_lock_sched_held+0x108/0x120
[   45.087848]  ? kmem_cache_free+0x24f/0x290
[   45.092065]  ? putname+0xf7/0x130
[   45.095499]  ? do_syscall_64+0x9a/0x820
[   45.099495]  ? do_syscall_64+0x9a/0x820
[   45.103458]  ? lockdep_hardirqs_on+0x421/0x5c0
[   45.108088]  ? security_file_ioctl+0x94/0xc0
[   45.112490]  ksys_ioctl+0xa9/0xd0
[   45.115929]  __x64_sys_ioctl+0x73/0xb0
[   45.119797]  do_syscall_64+0x1b9/0x820
[   45.123668]  ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[   45.129014]  ? syscall_return_slowpath+0x5e0/0x5e0
[   45.133983]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   45.138880]  ? trace_hardirqs_on_caller+0x310/0x310
[   45.143925]  ? prepare_exit_to_usermode+0x3b0/0x3b0
[   45.148934]  ? prepare_exit_to_usermode+0x291/0x3b0
[   45.153938]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   45.158764]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   45.163938] RIP: 0033:0x440009
[   45.167118] 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
[   45.186001] RSP: 002b:00007ffc92de56b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010
[   45.193728] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009
[   45.200985] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003
[   45.208348] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   45.215614] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890
[   45.222867] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000
[   45.230118] Modules linked in:
[   45.233404] ---[ end trace 8176ca570c306806 ]---
[   45.238157] RIP: 0010:rb_erase+0x306/0x3710
[   45.242521] 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
[   45.261591] RSP: 0018:ffff8801bb356918 EFLAGS: 00010202
[   45.266951] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   45.274428] RDX: 1ffff1003766ad2b RSI: ffffffff8afbc860 RDI: 0000000000000008
[   45.281701] RBP: ffff8801bb357320 R08: dffffc0000000000 R09: fffffbfff12d6990
[   45.289008] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b7722970
[   45.296386] R13: dffffc0000000000 R14: ffff8801bb3572f8 R15: ffff8801bb357438
[   45.303688] FS:  0000000001531880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
[   45.311914] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   45.317777] CR2: 0000000020000080 CR3: 00000001d8e93000 CR4: 00000000001406f0
[   45.325066] Kernel panic - not syncing: Fatal exception
[   45.331192] Kernel Offset: disabled
[   45.334813] Rebooting in 86400 seconds..