[ OK ] Started Getty on tty4. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ 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. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.138' (ECDSA) to the list of known hosts. syzkaller login: [ 83.684006][ T8494] IPVS: ftp: loaded support on port[0] = 21 executing program [ 83.839508][ T8517] ------------[ cut here ]------------ [ 83.845616][ T8517] Trying to write to read-only block-device loop0 (partno 0) [ 83.853865][ T8517] WARNING: CPU: 1 PID: 8517 at block/blk-core.c:704 submit_bio_checks+0x1ac3/0x1f70 [ 83.865744][ T8517] Modules linked in: [ 83.870894][ T8517] CPU: 1 PID: 8517 Comm: syz-executor486 Not tainted 5.10.0-rc7-syzkaller #0 [ 83.882127][ T8517] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.895536][ T8517] RIP: 0010:submit_bio_checks+0x1ac3/0x1f70 [ 83.903337][ T8517] Code: 0f 85 50 04 00 00 8b 9b 6c 05 00 00 48 8d 74 24 58 48 89 ef e8 4e 0d fe ff 48 c7 c7 80 87 9b 89 48 89 c6 89 da e8 b9 ce 0b 05 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 80 3c 02 [ 83.927033][ T8517] RSP: 0018:ffffc9000169f118 EFLAGS: 00010282 [ 83.933292][ T8517] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 83.942525][ T8517] RDX: ffff888020e1cec0 RSI: ffffffff8158c835 RDI: fffff520002d3e15 [ 83.952342][ T8517] RBP: ffff88801170f140 R08: 0000000000000001 R09: ffff8880b9f2011b [ 83.961619][ T8517] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880186ce120 [ 83.970524][ T8517] R13: 1ffff920002d3e2a R14: ffff88801170f150 R15: ffff88801170f148 [ 83.979877][ T8517] FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 83.990743][ T8517] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.998579][ T8517] CR2: 00005580b2707fc0 CR3: 000000002c60f000 CR4: 00000000001506e0 [ 84.006970][ T8517] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 84.015278][ T8517] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 84.023576][ T8517] Call Trace: [ 84.027357][ T8517] ? trace_event_raw_event_block_rq_requeue+0x550/0x550 [ 84.034547][ T8517] ? __lock_acquire+0xbd6/0x5500 [ 84.040082][ T8517] submit_bio_noacct+0x81/0xe30 [ 84.044966][ T8517] ? blk_queue_enter+0xb00/0xb00 [ 84.050140][ T8517] ? find_held_lock+0x2d/0x110 [ 84.055065][ T8517] submit_bio+0x263/0x5b0 [ 84.059540][ T8517] ? submit_bio_noacct+0xe30/0xe30 [ 84.064702][ T8517] submit_bh_wbc+0x685/0x8e0 [ 84.069450][ T8517] __block_write_full_page+0x837/0x12f0 [ 84.075134][ T8517] ? bdev_evict_inode+0x460/0x460 [ 84.081632][ T8517] block_write_full_page+0x205/0x260 [ 84.087416][ T8517] ? bdev_evict_inode+0x460/0x460 [ 84.093265][ T8517] __writepage+0x60/0x180 [ 84.098132][ T8517] write_cache_pages+0x754/0x1190 [ 84.103269][ T8517] ? tag_pages_for_writeback+0x440/0x440 [ 84.111409][ T8517] ? clear_page_dirty_for_io+0xbe0/0xbe0 [ 84.117295][ T8517] ? lock_chain_count+0x20/0x20 [ 84.122349][ T8517] ? __lock_acquire+0x16b7/0x5500 [ 84.127628][ T8517] ? blkdev_readahead+0x20/0x20 [ 84.132638][ T8517] generic_writepages+0xe2/0x150 [ 84.137873][ T8517] ? write_cache_pages+0x1190/0x1190 [ 84.143214][ T8517] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 84.149392][ T8517] ? find_held_lock+0x2d/0x110 [ 84.154724][ T8517] do_writepages+0xec/0x290 [ 84.159382][ T8517] ? writeback_set_ratelimit+0x150/0x150 [ 84.165696][ T8517] ? do_raw_spin_lock+0x120/0x2b0 [ 84.170752][ T8517] ? do_raw_spin_unlock+0x171/0x230 [ 84.176138][ T8517] ? _raw_spin_unlock+0x24/0x40 [ 84.181055][ T8517] ? wbc_attach_and_unlock_inode+0x117/0x9e0 [ 84.195475][ T8517] __filemap_fdatawrite_range+0x2a1/0x380 [ 84.201389][ T8517] ? delete_from_page_cache_batch+0xdf0/0xdf0 [ 84.216285][ T8517] ? lock_downgrade+0x6d0/0x6d0 [ 84.222000][ T8517] ? blkdev_put+0x30/0x520 [ 84.229075][ T8517] filemap_write_and_wait_range+0xe1/0x1c0 [ 84.234964][ T8517] __blkdev_put+0x69a/0x890 [ 84.240272][ T8517] ? fsync_bdev+0xd0/0xd0 [ 84.245079][ T8517] ? locks_remove_file+0x30d/0x560 [ 84.253018][ T8517] ? blkdev_put+0x85/0x520 [ 84.258035][ T8517] blkdev_close+0x8c/0xb0 [ 84.262426][ T8517] __fput+0x285/0x920 [ 84.266548][ T8517] ? blkdev_put+0x520/0x520 [ 84.271058][ T8517] task_work_run+0xdd/0x190 [ 84.275724][ T8517] do_exit+0xb64/0x29b0 [ 84.279917][ T8517] ? find_held_lock+0x2d/0x110 [ 84.284698][ T8517] ? mm_update_next_owner+0x7a0/0x7a0 [ 84.290264][ T8517] ? get_signal+0x34f/0x1f10 [ 84.294945][ T8517] ? lock_downgrade+0x6d0/0x6d0 [ 84.300518][ T8517] do_group_exit+0x125/0x310 [ 84.305661][ T8517] get_signal+0x42a/0x1f10 [ 84.310434][ T8517] ? _raw_spin_unlock_irqrestore+0x42/0x50 [ 84.316826][ T8517] ? _raw_spin_unlock_irqrestore+0x2f/0x50 [ 84.324814][ T8517] arch_do_signal+0x82/0x2390 [ 84.329815][ T8517] ? debug_object_init_on_stack+0x20/0x20 [ 84.337926][ T8517] ? copy_siginfo_to_user32+0xa0/0xa0 [ 84.343578][ T8517] ? __do_sys_futex+0x2a2/0x470 [ 84.348609][ T8517] ? do_futex+0x1a60/0x1a60 [ 84.353140][ T8517] exit_to_user_mode_prepare+0x100/0x1a0 [ 84.358944][ T8517] syscall_exit_to_user_mode+0x38/0x260 [ 84.364606][ T8517] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 84.374245][ T8517] RIP: 0033:0x44a759 [ 84.379178][ T8517] Code: Unable to access opcode bytes at RIP 0x44a72f. [ 84.387505][ T8517] RSP: 002b:00007f4ef8b52d98 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 84.396102][ T8517] RAX: fffffffffffffe00 RBX: 00000000006dcc48 RCX: 000000000044a759 [ 84.404132][ T8517] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dcc48 [ 84.412490][ T8517] RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 [ 84.420947][ T8517] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c [ 84.429214][ T8517] R13: 3de76bbc993b2572 R14: c301ad5d89e03611 R15: 2cb1db97edb102bb [ 84.437332][ T8517] Kernel panic - not syncing: panic_on_warn set ... [ 84.444479][ T8517] CPU: 1 PID: 8517 Comm: syz-executor486 Not tainted 5.10.0-rc7-syzkaller #0 [ 84.453335][ T8517] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.464498][ T8517] Call Trace: [ 84.468621][ T8517] dump_stack+0x107/0x163 [ 84.473674][ T8517] panic+0x306/0x73d [ 84.477829][ T8517] ? __warn_printk+0xf3/0xf3 [ 84.482940][ T8517] ? __warn.cold+0x1a/0x44 [ 84.488707][ T8517] ? __warn+0xf1/0x210 [ 84.493316][ T8517] ? submit_bio_checks+0x1ac3/0x1f70 [ 84.499805][ T8517] __warn.cold+0x35/0x44 [ 84.505302][ T8517] ? wake_up_klogd.part.0+0x8e/0xd0 [ 84.511053][ T8517] ? submit_bio_checks+0x1ac3/0x1f70 [ 84.516468][ T8517] report_bug+0x1bd/0x210 [ 84.520887][ T8517] handle_bug+0x3c/0x60 [ 84.525192][ T8517] exc_invalid_op+0x14/0x40 [ 84.530523][ T8517] asm_exc_invalid_op+0x12/0x20 [ 84.535818][ T8517] RIP: 0010:submit_bio_checks+0x1ac3/0x1f70 [ 84.542027][ T8517] Code: 0f 85 50 04 00 00 8b 9b 6c 05 00 00 48 8d 74 24 58 48 89 ef e8 4e 0d fe ff 48 c7 c7 80 87 9b 89 48 89 c6 89 da e8 b9 ce 0b 05 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 80 3c 02 [ 84.562042][ T8517] RSP: 0018:ffffc9000169f118 EFLAGS: 00010282 [ 84.568539][ T8517] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 84.578866][ T8517] RDX: ffff888020e1cec0 RSI: ffffffff8158c835 RDI: fffff520002d3e15 [ 84.587981][ T8517] RBP: ffff88801170f140 R08: 0000000000000001 R09: ffff8880b9f2011b [ 84.596903][ T8517] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880186ce120 [ 84.606088][ T8517] R13: 1ffff920002d3e2a R14: ffff88801170f150 R15: ffff88801170f148 [ 84.614251][ T8517] ? vprintk_func+0x95/0x1e0 [ 84.618950][ T8517] ? submit_bio_checks+0x1ac3/0x1f70 [ 84.625220][ T8517] ? trace_event_raw_event_block_rq_requeue+0x550/0x550 [ 84.632220][ T8517] ? __lock_acquire+0xbd6/0x5500 [ 84.638491][ T8517] submit_bio_noacct+0x81/0xe30 [ 84.643487][ T8517] ? blk_queue_enter+0xb00/0xb00 [ 84.649539][ T8517] ? find_held_lock+0x2d/0x110 [ 84.655250][ T8517] submit_bio+0x263/0x5b0 [ 84.661395][ T8517] ? submit_bio_noacct+0xe30/0xe30 [ 84.666590][ T8517] submit_bh_wbc+0x685/0x8e0 [ 84.671214][ T8517] __block_write_full_page+0x837/0x12f0 [ 84.677130][ T8517] ? bdev_evict_inode+0x460/0x460 [ 84.682170][ T8517] block_write_full_page+0x205/0x260 [ 84.687492][ T8517] ? bdev_evict_inode+0x460/0x460 [ 84.692732][ T8517] __writepage+0x60/0x180 [ 84.697348][ T8517] write_cache_pages+0x754/0x1190 [ 84.702451][ T8517] ? tag_pages_for_writeback+0x440/0x440 [ 84.709098][ T8517] ? clear_page_dirty_for_io+0xbe0/0xbe0 [ 84.714807][ T8517] ? lock_chain_count+0x20/0x20 [ 84.719993][ T8517] ? __lock_acquire+0x16b7/0x5500 [ 84.725061][ T8517] ? blkdev_readahead+0x20/0x20 [ 84.730215][ T8517] generic_writepages+0xe2/0x150 [ 84.735221][ T8517] ? write_cache_pages+0x1190/0x1190 [ 84.740589][ T8517] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 84.746592][ T8517] ? find_held_lock+0x2d/0x110 [ 84.751380][ T8517] do_writepages+0xec/0x290 [ 84.756126][ T8517] ? writeback_set_ratelimit+0x150/0x150 [ 84.761927][ T8517] ? do_raw_spin_lock+0x120/0x2b0 [ 84.767391][ T8517] ? do_raw_spin_unlock+0x171/0x230 [ 84.773605][ T8517] ? _raw_spin_unlock+0x24/0x40 [ 84.779458][ T8517] ? wbc_attach_and_unlock_inode+0x117/0x9e0 [ 84.785641][ T8517] __filemap_fdatawrite_range+0x2a1/0x380 [ 84.795199][ T8517] ? delete_from_page_cache_batch+0xdf0/0xdf0 [ 84.801967][ T8517] ? lock_downgrade+0x6d0/0x6d0 [ 84.806864][ T8517] ? blkdev_put+0x30/0x520 [ 84.811300][ T8517] filemap_write_and_wait_range+0xe1/0x1c0 [ 84.817145][ T8517] __blkdev_put+0x69a/0x890 [ 84.821717][ T8517] ? fsync_bdev+0xd0/0xd0 [ 84.826139][ T8517] ? locks_remove_file+0x30d/0x560 [ 84.831289][ T8517] ? blkdev_put+0x85/0x520 [ 84.835871][ T8517] blkdev_close+0x8c/0xb0 [ 84.840395][ T8517] __fput+0x285/0x920 [ 84.844654][ T8517] ? blkdev_put+0x520/0x520 [ 84.849178][ T8517] task_work_run+0xdd/0x190 [ 84.853685][ T8517] do_exit+0xb64/0x29b0 [ 84.858458][ T8517] ? find_held_lock+0x2d/0x110 [ 84.863789][ T8517] ? mm_update_next_owner+0x7a0/0x7a0 [ 84.869628][ T8517] ? get_signal+0x34f/0x1f10 [ 84.875789][ T8517] ? lock_downgrade+0x6d0/0x6d0 [ 84.880682][ T8517] do_group_exit+0x125/0x310 [ 84.885484][ T8517] get_signal+0x42a/0x1f10 [ 84.891523][ T8517] ? _raw_spin_unlock_irqrestore+0x42/0x50 [ 84.898926][ T8517] ? _raw_spin_unlock_irqrestore+0x2f/0x50 [ 84.909509][ T8517] arch_do_signal+0x82/0x2390 [ 84.914722][ T8517] ? debug_object_init_on_stack+0x20/0x20 [ 84.920502][ T8517] ? copy_siginfo_to_user32+0xa0/0xa0 [ 84.926027][ T8517] ? __do_sys_futex+0x2a2/0x470 [ 84.931448][ T8517] ? do_futex+0x1a60/0x1a60 [ 84.936201][ T8517] exit_to_user_mode_prepare+0x100/0x1a0 [ 84.941945][ T8517] syscall_exit_to_user_mode+0x38/0x260 [ 84.948819][ T8517] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 84.955050][ T8517] RIP: 0033:0x44a759 [ 84.958963][ T8517] Code: Unable to access opcode bytes at RIP 0x44a72f. [ 84.966328][ T8517] RSP: 002b:00007f4ef8b52d98 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 84.974769][ T8517] RAX: fffffffffffffe00 RBX: 00000000006dcc48 RCX: 000000000044a759 [ 84.982747][ T8517] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dcc48 [ 84.990848][ T8517] RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 [ 84.999568][ T8517] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c [ 85.089102][ T8517] R13: 3de76bbc993b2572 R14: c301ad5d89e03611 R15: 2cb1db97edb102bb [ 85.097630][ T8517] Kernel Offset: disabled [ 85.102077][ T8517] Rebooting in 86400 seconds..