[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.55' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   33.258498] audit: type=1400 audit(1601598448.069:8): avc:  denied  { execmem } for  pid=6348 comm="syz-executor540" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[   33.280432] IPVS: ftp: loaded support on port[0] = 21
[   33.329328] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
[   33.339778] Quota error (device loop0): qtree_write_dquot: Error -2147481216 occurred while creating quota
[   33.357813] BUG: unable to handle kernel paging request at fffffbfff000014f
[   33.364956] IP: dqput.part.0+0x9d/0x750
[   33.368928] PGD 21ffec067 P4D 21ffec067 PUD 21ffeb067 PMD 0 
[   33.374735] Oops: 0000 [#1] PREEMPT SMP KASAN
[   33.379222] Modules linked in:
[   33.382513] CPU: 0 PID: 6349 Comm: syz-executor540 Not tainted 4.14.198-syzkaller #0
[   33.390389] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.399752] task: ffff88809757e000 task.stack: ffff888086cc0000
[   33.405810] RIP: 0010:dqput.part.0+0x9d/0x750
[   33.410311] RSP: 0018:ffff888086cc7980 EFLAGS: 00010282
[   33.415659] RAX: dffffc0000000000 RBX: ffffffff80000980 RCX: 0000000000002176
[   33.422920] RDX: 1ffffffff0f82502 RSI: 0000000000000001 RDI: ffffffff87c12804
[   33.430182] RBP: dffffc0000000000 R08: ffffffff8a08d530 R09: 00000000000401ca
[   33.437443] R10: ffff88809757e8b0 R11: ffff88809757e000 R12: 0000000000000003
[   33.444706] R13: fffffbfff000014f R14: ffffffff80000a98 R15: ffffffff80000a78
[   33.451971] FS:  0000000002677880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
[   33.460196] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.466071] CR2: fffffbfff000014f CR3: 0000000094995000 CR4: 00000000001406f0
[   33.473342] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.480607] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.487867] Call Trace:
[   33.490454]  __dquot_drop+0x193/0x250
[   33.494256]  ? dquot_scan_active+0x290/0x290
[   33.498664]  ? _raw_spin_unlock_irq+0x24/0x80
[   33.503169]  dquot_drop+0x13e/0x190
[   33.506809]  ext4_clear_inode+0x31/0x1d0
[   33.510884]  ext4_evict_inode+0x1f1/0x1500
[   33.515126]  ? ext4_journalled_write_end+0x1140/0x1140
[   33.520526]  ? ext4_journalled_write_end+0x1140/0x1140
[   33.525802]  evict+0x2c8/0x700
[   33.528991]  ? lock_acquire+0x170/0x3f0
[   33.532960]  dispose_list+0x109/0x1e0
[   33.536752]  evict_inodes+0x2cd/0x3a0
[   33.540547]  ? dispose_list+0x1e0/0x1e0
[   33.544513]  ? fsnotify_unmount_inodes+0x1b4/0x210
[   33.549436]  generic_shutdown_super+0xb3/0x370
[   33.554013]  kill_block_super+0x95/0xe0
[   33.557981]  deactivate_locked_super+0x6c/0xd0
[   33.562568]  deactivate_super+0x7f/0xa0
[   33.566533]  cleanup_mnt+0x186/0x2c0
[   33.570252]  task_work_run+0x11f/0x190
[   33.574150]  do_exit+0xa08/0x27f0
[   33.577608]  ? __do_page_fault+0x5a0/0xb50
[   33.581830]  ? mm_update_next_owner+0x5b0/0x5b0
[   33.586488]  ? lock_downgrade+0x740/0x740
[   33.590630]  do_group_exit+0x100/0x2e0
[   33.594506]  SyS_exit_group+0x19/0x20
[   33.598295]  ? do_group_exit+0x2e0/0x2e0
[   33.602356]  do_syscall_64+0x1d5/0x640
[   33.606238]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   33.611411] RIP: 0033:0x443918
[   33.614600] RSP: 002b:00007ffc7a582e18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   33.622314] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000443918
[   33.629572] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001
[   33.636828] RBP: 00000000004c3e30 R08: 00000000000000e7 R09: ffffffffffffffd0
[   33.644105] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
[   33.651369] R13: 00000000006d6180 R14: 0000000000000000 R15: 0000000000000000
[   33.658637] Code: 8d b3 18 01 00 00 49 c1 ed 03 41 83 e4 07 49 01 ed 41 83 c4 03 e8 a4 82 70 01 e8 7f 82 b7 ff 48 c7 c7 00 28 c1 87 e8 13 78 b1 04 <41> 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 cf 04 00 00 8b 83 f8 
[   33.678779] RIP: dqput.part.0+0x9d/0x750 RSP: ffff888086cc7980
[   33.684735] CR2: fffffbfff000014f
[   33.688179] ---[ end trace 68d5dc94bb695a40 ]---
[   33.692922] Kernel panic - not syncing: Fatal exception
[   33.699214] Kernel Offset: disabled
[   33.702828] Rebooting in 86400 seconds..