Warning: Permanently added '10.128.0.110' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.534530] ------------[ cut here ]------------ [ 40.539298] generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) [ 40.548704] WARNING: CPU: 0 PID: 8101 at block/blk-core.c:2183 generic_make_request_checks+0x17d9/0x22e0 [ 40.558320] Kernel panic - not syncing: panic_on_warn set ... [ 40.558320] [ 40.565663] CPU: 0 PID: 8101 Comm: syz-executor985 Not tainted 4.19.211-syzkaller #0 [ 40.573519] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.582849] Call Trace: [ 40.585421] dump_stack+0x1fc/0x2ef [ 40.589033] panic+0x26a/0x50e [ 40.592207] ? __warn_printk+0xf3/0xf3 [ 40.596079] ? generic_make_request_checks+0x17d9/0x22e0 [ 40.601513] ? __probe_kernel_read+0x130/0x1b0 [ 40.606075] ? __warn.cold+0x5/0x5a [ 40.609681] ? __warn+0xe4/0x200 [ 40.613033] ? generic_make_request_checks+0x17d9/0x22e0 [ 40.618466] __warn.cold+0x20/0x5a [ 40.621983] ? io_schedule_timeout+0x140/0x140 [ 40.626543] ? generic_make_request_checks+0x17d9/0x22e0 [ 40.631972] report_bug+0x262/0x2b0 [ 40.635591] do_error_trap+0x1d7/0x310 [ 40.639458] ? math_error+0x310/0x310 [ 40.643243] ? __irq_work_queue_local+0x101/0x160 [ 40.648065] ? irq_work_queue+0x29/0x80 [ 40.652026] ? error_entry+0x72/0xd0 [ 40.655718] ? trace_hardirqs_off_caller+0x6e/0x210 [ 40.660721] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.665544] invalid_op+0x14/0x20 [ 40.668978] RIP: 0010:generic_make_request_checks+0x17d9/0x22e0 [ 40.675012] 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 [ 40.693895] RSP: 0018:ffff8880950ff368 EFLAGS: 00010286 [ 40.699235] RAX: 0000000000000000 RBX: ffff8880ae1bc040 RCX: 0000000000000000 [ 40.706483] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012a1fe5f [ 40.713864] RBP: ffff8880aa26ba00 R08: 0000000000000001 R09: 0000000000000000 [ 40.721116] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880aa26ba30 [ 40.728372] R13: ffff8880aa26ba08 R14: 0000000000000000 R15: 0000000000000000 [ 40.735641] ? vprintk_func+0x81/0x180 [ 40.739516] ? generic_make_request_checks+0x17d9/0x22e0 [ 40.744950] ? should_fail_bio.isra.0+0xa0/0xa0 [ 40.749611] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 40.754609] ? kmem_cache_alloc+0x315/0x370 [ 40.758915] generic_make_request+0x23f/0xdf0 [ 40.763393] ? blk_put_request+0x110/0x110 [ 40.767608] ? sb_mark_inode_writeback+0xc8/0x490 [ 40.772431] submit_bio+0xb1/0x430 [ 40.775953] ? generic_make_request+0xdf0/0xdf0 [ 40.780619] ? check_preemption_disabled+0x41/0x280 [ 40.785615] ? guard_bio_eod+0x2a0/0x650 [ 40.789656] submit_bh_wbc+0x5a7/0x760 [ 40.793525] __block_write_full_page+0x71a/0xf60 [ 40.798274] ? block_llseek+0xc0/0xc0 [ 40.802055] block_write_full_page+0x1f3/0x260 [ 40.806612] ? block_llseek+0xc0/0xc0 [ 40.810397] __writepage+0x5e/0xe0 [ 40.813918] write_cache_pages+0x802/0x12d0 [ 40.818220] ? tag_pages_for_writeback+0x2f0/0x2f0 [ 40.823129] ? clear_page_dirty_for_io+0xee0/0xee0 [ 40.828037] ? deref_stack_reg+0x134/0x1d0 [ 40.832344] ? get_reg+0x176/0x1f0 [ 40.835863] ? __read_once_size_nocheck.constprop.0+0x10/0x10 [ 40.841726] ? deref_stack_reg+0x1d0/0x1d0 [ 40.845947] ? __lock_acquire+0x6de/0x3ff0 [ 40.850167] ? blkdev_readpages+0x30/0x30 [ 40.854299] generic_writepages+0xdb/0x150 [ 40.858515] ? dirty_poll_interval.part.0+0x30/0x30 [ 40.863509] ? mark_held_locks+0xf0/0xf0 [ 40.867556] do_writepages+0xe5/0x290 [ 40.871337] ? page_writeback_cpu_online+0x10/0x10 [ 40.876247] ? do_raw_spin_unlock+0x171/0x230 [ 40.880721] ? _raw_spin_unlock+0x29/0x40 [ 40.884851] ? wbc_attach_and_unlock_inode+0x11d/0x9e0 [ 40.890108] __filemap_fdatawrite_range+0x27d/0x350 [ 40.895100] ? blkdev_put+0x30/0x520 [ 40.898790] ? delete_from_page_cache_batch+0xcc0/0xcc0 [ 40.904134] ? lock_downgrade+0x720/0x720 [ 40.908256] ? locks_remove_file+0x2c8/0x450 [ 40.912641] ? blkdev_put+0x30/0x520 [ 40.916333] ? blkdev_put+0x520/0x520 [ 40.920113] filemap_write_and_wait+0x42/0xd0 [ 40.924588] __blkdev_put+0x682/0x870 [ 40.928368] ? fsync_bdev+0xc0/0xc0 [ 40.931971] ? locks_remove_file+0x2cd/0x450 [ 40.936360] ? blkdev_put+0x85/0x520 [ 40.940055] ? blkdev_put+0x520/0x520 [ 40.943833] blkdev_close+0x86/0xb0 [ 40.947443] __fput+0x2ce/0x890 [ 40.950705] task_work_run+0x148/0x1c0 [ 40.954576] do_exit+0xbf3/0x2be0 [ 40.958013] ? lock_downgrade+0x720/0x720 [ 40.962139] ? mm_update_next_owner+0x650/0x650 [ 40.966788] ? up_read+0x17/0x110 [ 40.970226] ? __do_page_fault+0x180/0xd60 [ 40.974443] do_group_exit+0x125/0x310 [ 40.978311] __x64_sys_exit_group+0x3a/0x50 [ 40.982609] do_syscall_64+0xf9/0x620 [ 40.986393] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.991560] RIP: 0033:0x7fe8bf8dec39 [ 40.995252] Code: Bad RIP value. [ 40.998594] RSP: 002b:00007ffc16483b78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 41.006282] RAX: ffffffffffffffda RBX: 00007fe8bf952270 RCX: 00007fe8bf8dec39 [ 41.013539] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 41.020788] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000000 [ 41.028041] R10: 0000000000000004 R11: 0000000000000246 R12: 00007fe8bf952270 [ 41.035289] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 41.042717] Kernel Offset: disabled [ 41.046370] Rebooting in 86400 seconds..