[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.118' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 62.853834] ------------[ cut here ]------------ [ 62.858700] generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) [ 62.867902] WARNING: CPU: 0 PID: 8092 at block/blk-core.c:2183 generic_make_request_checks+0x17d9/0x22e0 [ 62.877523] Kernel panic - not syncing: panic_on_warn set ... [ 62.877523] [ 62.884879] CPU: 0 PID: 8092 Comm: syz-executor326 Not tainted 4.19.211-syzkaller #0 [ 62.893018] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.902360] Call Trace: [ 62.904934] dump_stack+0x1fc/0x2ef [ 62.908566] panic+0x26a/0x50e [ 62.911758] ? __warn_printk+0xf3/0xf3 [ 62.915652] ? generic_make_request_checks+0x17d9/0x22e0 [ 62.921085] ? __probe_kernel_read+0x130/0x1b0 [ 62.925654] ? __warn.cold+0x5/0x5a [ 62.929609] ? __warn+0xe4/0x200 [ 62.932960] ? generic_make_request_checks+0x17d9/0x22e0 [ 62.938389] __warn.cold+0x20/0x5a [ 62.941910] ? io_schedule_timeout+0x140/0x140 [ 62.946484] ? generic_make_request_checks+0x17d9/0x22e0 [ 62.951913] report_bug+0x262/0x2b0 [ 62.955536] do_error_trap+0x1d7/0x310 [ 62.959411] ? math_error+0x310/0x310 [ 62.963194] ? __irq_work_queue_local+0x101/0x160 [ 62.968039] ? irq_work_queue+0x29/0x80 [ 62.971991] ? error_entry+0x72/0xd0 [ 62.975690] ? trace_hardirqs_off_caller+0x6e/0x210 [ 62.980701] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 62.985527] invalid_op+0x14/0x20 [ 62.988965] RIP: 0010:generic_make_request_checks+0x17d9/0x22e0 [ 62.995027] Code: ca 0a 00 00 45 8b b6 1c 05 00 00 48 8d 74 24 68 48 89 ef e8 b9 14 06 00 48 c7 c7 00 29 b2 88 48 89 c6 44 89 f2 e8 4c 94 91 04 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 [ 63.013905] RSP: 0018:ffff8880b15f7368 EFLAGS: 00010286 [ 63.019249] RAX: 0000000000000000 RBX: ffff8880ae7ab040 RCX: 0000000000000000 [ 63.026499] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed10162bee5f [ 63.033747] RBP: ffff8880b30957c0 R08: 0000000000000001 R09: 0000000000000000 [ 63.040997] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b30957f0 [ 63.048246] R13: ffff8880b30957c8 R14: 0000000000000000 R15: 0000000000000000 [ 63.055509] ? vprintk_func+0x81/0x180 [ 63.059383] ? generic_make_request_checks+0x17d9/0x22e0 [ 63.064818] ? should_fail_bio.isra.0+0xa0/0xa0 [ 63.069467] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 63.074489] ? kmem_cache_alloc+0x315/0x370 [ 63.078796] generic_make_request+0x23f/0xdf0 [ 63.083273] ? blk_put_request+0x110/0x110 [ 63.087504] ? sb_mark_inode_writeback+0xc8/0x490 [ 63.092335] submit_bio+0xb1/0x430 [ 63.095871] ? generic_make_request+0xdf0/0xdf0 [ 63.100521] ? check_preemption_disabled+0x41/0x280 [ 63.105521] ? guard_bio_eod+0x2a0/0x650 [ 63.109577] submit_bh_wbc+0x5a7/0x760 [ 63.113450] __block_write_full_page+0x71a/0xf60 [ 63.118201] ? block_llseek+0xc0/0xc0 [ 63.122001] block_write_full_page+0x1f3/0x260 [ 63.126565] ? block_llseek+0xc0/0xc0 [ 63.130349] __writepage+0x5e/0xe0 [ 63.133870] write_cache_pages+0x802/0x12d0 [ 63.138173] ? tag_pages_for_writeback+0x2f0/0x2f0 [ 63.143106] ? clear_page_dirty_for_io+0xee0/0xee0 [ 63.148107] ? get_reg+0x1f0/0x1f0 [ 63.151634] ? __lock_acquire+0x6de/0x3ff0 [ 63.155851] ? __save_stack_trace+0x72/0x190 [ 63.160239] ? blkdev_readpages+0x30/0x30 [ 63.164366] generic_writepages+0xdb/0x150 [ 63.168591] ? dirty_poll_interval.part.0+0x30/0x30 [ 63.173588] ? mark_held_locks+0xf0/0xf0 [ 63.177636] do_writepages+0xe5/0x290 [ 63.181423] ? page_writeback_cpu_online+0x10/0x10 [ 63.186335] ? do_raw_spin_unlock+0x171/0x230 [ 63.190812] ? _raw_spin_unlock+0x29/0x40 [ 63.194941] ? wbc_attach_and_unlock_inode+0x11d/0x9e0 [ 63.200201] __filemap_fdatawrite_range+0x27d/0x350 [ 63.205196] ? blkdev_put+0x30/0x520 [ 63.208890] ? delete_from_page_cache_batch+0xcc0/0xcc0 [ 63.214253] ? lock_downgrade+0x720/0x720 [ 63.218380] ? locks_remove_file+0x2c8/0x450 [ 63.222854] ? blkdev_put+0x30/0x520 [ 63.226548] ? blkdev_put+0x520/0x520 [ 63.230327] filemap_write_and_wait+0x42/0xd0 [ 63.234803] __blkdev_put+0x682/0x870 [ 63.238588] ? fsync_bdev+0xc0/0xc0 [ 63.242193] ? locks_remove_file+0x2cd/0x450 [ 63.246671] ? blkdev_put+0x85/0x520 [ 63.250377] ? blkdev_put+0x520/0x520 [ 63.254157] blkdev_close+0x86/0xb0 [ 63.257765] __fput+0x2ce/0x890 [ 63.261119] task_work_run+0x148/0x1c0 [ 63.264990] do_exit+0xbf3/0x2be0 [ 63.268438] ? lock_downgrade+0x720/0x720 [ 63.272567] ? mm_update_next_owner+0x650/0x650 [ 63.277237] ? up_read+0x17/0x110 [ 63.280673] ? __do_page_fault+0x180/0xd60 [ 63.284890] do_group_exit+0x125/0x310 [ 63.288758] __x64_sys_exit_group+0x3a/0x50 [ 63.293062] do_syscall_64+0xf9/0x620 [ 63.296859] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 63.302039] RIP: 0033:0x7fa032a19c09 [ 63.305744] Code: Bad RIP value. [ 63.309116] RSP: 002b:00007ffdaeda7f58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 63.316814] RAX: ffffffffffffffda RBX: 00007fa032a8d270 RCX: 00007fa032a19c09 [ 63.324070] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 63.331320] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000000 [ 63.338585] R10: 0000000000000004 R11: 0000000000000246 R12: 00007fa032a8d270 [ 63.345833] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 63.353440] Kernel Offset: disabled [ 63.357114] Rebooting in 86400 seconds..