[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.10.32' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   43.761133] audit: type=1400 audit(1601315126.005:8): avc:  denied  { execmem } for  pid=6468 comm="syz-executor310" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[   43.773828] IPVS: ftp: loaded support on port[0] = 21
[   43.820661] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024)
[   43.830485] NILFS (loop0): mounting unchecked fs
[   43.848567] NILFS (loop0): recovery complete
[   43.854713] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[   43.872639] WARNING: CPU: 1 PID: 6493 at include/linux/backing-dev.h:339 account_page_dirtied+0x8e9/0xbe0
[   43.882499] Kernel panic - not syncing: panic_on_warn set ...
[   43.882499] 
[   43.889845] CPU: 1 PID: 6493 Comm: segctord Not tainted 4.19.148-syzkaller #0
[   43.897099] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   43.906430] Call Trace:
[   43.909006]  dump_stack+0x22c/0x33e
[   43.912619]  panic+0x2ac/0x565
[   43.915796]  ? __warn_printk+0xf3/0xf3
[   43.919668]  ? account_page_dirtied+0x8e9/0xbe0
[   43.924318]  ? __probe_kernel_read+0x130/0x1b0
[   43.928894]  ? __warn.cold+0x5/0x5a
[   43.932500]  ? __warn+0xe4/0x200
[   43.935855]  ? account_page_dirtied+0x8e9/0xbe0
[   43.940509]  __warn.cold+0x20/0x5a
[   43.944036]  ? account_page_dirtied+0x8e9/0xbe0
[   43.948687]  report_bug+0x262/0x2b0
[   43.952312]  do_error_trap+0x1e1/0x330
[   43.956196]  ? math_error+0x320/0x320
[   43.959976]  ? mark_held_locks+0xf0/0xf0
[   43.964014]  ? mark_held_locks+0xf0/0xf0
[   43.968056]  ? trace_hardirqs_off_caller+0x69/0x210
[   43.973165]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   43.977994]  invalid_op+0x14/0x20
[   43.981449] RIP: 0010:account_page_dirtied+0x8e9/0xbe0
[   43.986710] Code: 88 01 00 00 be ff ff ff ff 48 8d 78 70 e8 0f 30 c6 ff 31 ff 89 c3 89 c6 e8 34 a5 e0 ff 85 db 0f 85 1c f9 ff ff e8 b7 a3 e0 ff <0f> 0b e9 10 f9 ff ff e8 ab a3 e0 ff 4c 89 e6 4c 89 ef e8 d0 d7 2f
[   44.005592] RSP: 0018:ffff8880a3ed7868 EFLAGS: 00010093
[   44.010947] RAX: ffff888094c3e380 RBX: 0000000000000000 RCX: ffffffff81911f1c
[   44.018196] RDX: 0000000000000000 RSI: ffffffff81911f29 RDI: 0000000000000005
[   44.025447] RBP: ffff888082bceb48 R08: 0000000000000000 R09: 0000000000000000
[   44.032707] R10: 0000000000000005 R11: 000000000000002d R12: ffffea000232f740
[   44.039958] R13: ffff888082bce9c0 R14: ffff888082bce838 R15: ffffea000232f748
[   44.047245]  ? account_page_dirtied+0x8dc/0xbe0
[   44.051897]  ? account_page_dirtied+0x8e9/0xbe0
[   44.056552]  ? account_page_dirtied+0x8e9/0xbe0
[   44.061208]  __set_page_dirty+0x7f/0x3f0
[   44.065252]  ? lock_page_memcg+0xb4/0x230
[   44.069383]  mark_buffer_dirty+0x442/0x5f0
[   44.073603]  nilfs_btree_propagate+0x72f/0xd80
[   44.078176]  nilfs_bmap_propagate+0x73/0x170
[   44.082571]  nilfs_collect_dat_data+0x45/0xd0
[   44.087051]  nilfs_segctor_apply_buffers+0x14a/0x490
[   44.092145]  ? nilfs_collect_file_bmap+0x70/0x70
[   44.096887]  nilfs_segctor_scan_file+0x3ae/0x6b0
[   44.101658]  ? nilfs_write_file_data_binfo+0x270/0x270
[   44.106931]  nilfs_segctor_do_construct+0x15bf/0x80e0
[   44.112122]  ? nilfs_segctor_scan_file+0x6b0/0x6b0
[   44.117047]  ? lock_downgrade+0x750/0x750
[   44.121184]  ? lock_acquire+0x170/0x3f0
[   44.125184]  ? nilfs_segctor_confirm+0xbc/0x150
[   44.129865]  ? do_raw_spin_unlock+0x171/0x240
[   44.134347]  ? _raw_spin_unlock+0x29/0x40
[   44.138485]  nilfs_segctor_construct+0x764/0xae0
[   44.143238]  nilfs_segctor_thread+0x3cb/0xf50
[   44.147728]  ? nilfs_segctor_construct+0xae0/0xae0
[   44.152648]  ? __kthread_parkme+0x5d/0x1e0
[   44.156866]  ? _raw_spin_unlock_irqrestore+0x7d/0xf0
[   44.161969]  ? wait_woken+0x320/0x320
[   44.165762]  ? _raw_spin_unlock_irqrestore+0x6a/0xf0
[   44.170858]  ? __kthread_parkme+0x133/0x1e0
[   44.175169]  ? nilfs_segctor_construct+0xae0/0xae0
[   44.180085]  kthread+0x33f/0x460
[   44.183542]  ? kthread_park+0x180/0x180
[   44.187501]  ret_from_fork+0x24/0x30
[   44.192885] Kernel Offset: disabled
[   44.196578] Rebooting in 86400 seconds..