[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.231' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.847360][ T8402] ------------[ cut here ]------------ [ 55.853389][ T8402] Trying to write to read-only block-device nullb0 (partno 0) [ 55.862233][ T8402] WARNING: CPU: 0 PID: 8402 at block/blk-core.c:704 submit_bio_checks+0x165c/0x1aa0 [ 55.871831][ T8402] Modules linked in: [ 55.875729][ T8402] CPU: 0 PID: 8402 Comm: syz-executor346 Not tainted 5.12.0-rc4-syzkaller #0 [ 55.884557][ T8402] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.894696][ T8402] RIP: 0010:submit_bio_checks+0x165c/0x1aa0 [ 55.900669][ T8402] Code: 00 00 45 0f b6 a4 24 e0 05 00 00 48 8d 74 24 60 48 89 ef e8 f6 3e fe ff 48 c7 c7 a0 09 c0 89 48 89 c6 44 89 e2 e8 61 fc 0e 05 <0f> 0b e9 36 f3 ff ff e8 e8 14 c1 fd 0f 0b e9 bf f1 ff ff e8 dc 14 [ 55.920573][ T8402] RSP: 0018:ffffc90000eef318 EFLAGS: 00010282 [ 55.926982][ T8402] RAX: 0000000000000000 RBX: ffff888019c06f40 RCX: 0000000000000000 [ 55.935664][ T8402] RDX: ffff888021e1b880 RSI: ffffffff815c4cf5 RDI: fffff520001dde55 [ 55.943974][ T8402] RBP: ffff888011e5ba00 R08: 0000000000000000 R09: 0000000000000000 [ 55.952270][ T8402] R10: ffffffff815bda8e R11: 0000000000000000 R12: 0000000000000000 [ 55.960390][ T8402] R13: ffff888011e5ba10 R14: ffff88801a0a8b80 R15: ffff888019c0744c [ 55.968366][ T8402] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 55.977546][ T8402] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.984254][ T8402] CR2: 0000000000480df8 CR3: 0000000013ad1000 CR4: 0000000000350ef0 [ 55.992490][ T8402] Call Trace: [ 55.995777][ T8402] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 56.002788][ T8402] ? __lock_acquire+0xb43/0x54c0 [ 56.007733][ T8402] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 56.013799][ T8402] submit_bio_noacct+0x81/0xf20 [ 56.018682][ T8402] ? blk_queue_enter+0xb50/0xb50 [ 56.023729][ T8402] ? bio_associate_blkg_from_css+0x563/0xf60 [ 56.030019][ T8402] ? lock_downgrade+0x6e0/0x6e0 [ 56.035303][ T8402] submit_bio+0x263/0x5e0 [ 56.039868][ T8402] ? submit_bio_noacct+0xf20/0xf20 [ 56.045245][ T8402] ? bio_add_page+0x186/0x1f0 [ 56.050046][ T8402] ? __bio_try_merge_page+0x350/0x350 [ 56.055426][ T8402] submit_bh_wbc+0x5eb/0x7f0 [ 56.060163][ T8402] __block_write_full_page+0x86c/0x1340 [ 56.065721][ T8402] ? bdev_disk_changed+0x3c0/0x3c0 [ 56.071051][ T8402] block_write_full_page+0x14d/0x190 [ 56.076428][ T8402] ? bdev_disk_changed+0x3c0/0x3c0 [ 56.081579][ T8402] __writepage+0x60/0x180 [ 56.085911][ T8402] write_cache_pages+0x759/0x11a0 [ 56.091080][ T8402] ? tag_pages_for_writeback+0x450/0x450 [ 56.096734][ T8402] ? clear_page_dirty_for_io+0xa10/0xa10 [ 56.103271][ T8402] ? free_zapped_rcu+0x2b1/0x310 [ 56.110507][ T8402] ? lock_chain_count+0x20/0x20 [ 56.115439][ T8402] ? __lock_acquire+0x16b3/0x54c0 [ 56.121002][ T8402] ? blkdev_readahead+0x20/0x20 [ 56.125981][ T8402] generic_writepages+0xe2/0x150 [ 56.131009][ T8402] ? write_cache_pages+0x11a0/0x11a0 [ 56.136338][ T8402] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 56.142704][ T8402] ? find_held_lock+0x2d/0x110 [ 56.147512][ T8402] do_writepages+0xec/0x290 [ 56.152181][ T8402] ? writeback_set_ratelimit+0x150/0x150 [ 56.158150][ T8402] ? do_raw_spin_lock+0x120/0x2b0 [ 56.163310][ T8402] ? do_raw_spin_unlock+0x171/0x230 [ 56.168534][ T8402] ? _raw_spin_unlock+0x24/0x40 [ 56.173563][ T8402] ? wbc_attach_and_unlock_inode+0x117/0x9e0 [ 56.179960][ T8402] __filemap_fdatawrite_range+0x2a5/0x390 [ 56.185798][ T8402] ? delete_from_page_cache_batch+0xe20/0xe20 [ 56.192040][ T8402] ? blkdev_put+0x86/0x580 [ 56.196555][ T8402] ? lock_downgrade+0x6e0/0x6e0 [ 56.201488][ T8402] filemap_write_and_wait_range+0xe1/0x1c0 [ 56.207320][ T8402] __blkdev_put+0x6b7/0x800 [ 56.211894][ T8402] ? __mutex_unlock_slowpath+0xe2/0x610 [ 56.217468][ T8402] ? freeze_bdev+0x250/0x250 [ 56.222110][ T8402] ? wait_for_completion_io+0x270/0x270 [ 56.227970][ T8402] ? _raw_spin_unlock+0x24/0x40 [ 56.233069][ T8402] ? locks_remove_file+0x312/0x560 [ 56.238200][ T8402] blkdev_put+0x92/0x580 [ 56.242543][ T8402] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 56.248806][ T8402] blkdev_close+0x8c/0xb0 [ 56.253683][ T8402] __fput+0x288/0x920 [ 56.257784][ T8402] ? blkdev_put+0x580/0x580 [ 56.262477][ T8402] task_work_run+0xdd/0x1a0 [ 56.267181][ T8402] do_exit+0xbfc/0x2a60 [ 56.271411][ T8402] ? mm_update_next_owner+0x7a0/0x7a0 [ 56.277063][ T8402] ? lock_downgrade+0x6e0/0x6e0 [ 56.281980][ T8402] do_group_exit+0x125/0x310 [ 56.286723][ T8402] __x64_sys_exit_group+0x3a/0x50 [ 56.291998][ T8402] do_syscall_64+0x2d/0x70 [ 56.297255][ T8402] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 56.304800][ T8402] RIP: 0033:0x43da99 [ 56.309039][ T8402] Code: Unable to access opcode bytes at RIP 0x43da6f. [ 56.315975][ T8402] RSP: 002b:00007ffe6fac5ff8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 56.324651][ T8402] RAX: ffffffffffffffda RBX: 00000000004ae230 RCX: 000000000043da99 [ 56.332886][ T8402] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 56.340924][ T8402] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000400488 [ 56.348905][ T8402] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004ae230 [ 56.357101][ T8402] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 56.365401][ T8402] Kernel panic - not syncing: panic_on_warn set ... [ 56.372274][ T8402] CPU: 1 PID: 8402 Comm: syz-executor346 Not tainted 5.12.0-rc4-syzkaller #0 [ 56.381134][ T8402] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.391355][ T8402] Call Trace: [ 56.394627][ T8402] dump_stack+0x141/0x1d7 [ 56.398988][ T8402] panic+0x306/0x73d [ 56.403051][ T8402] ? __warn_printk+0xf3/0xf3 [ 56.407643][ T8402] ? __warn.cold+0x1a/0x44 [ 56.412074][ T8402] ? submit_bio_checks+0x165c/0x1aa0 [ 56.417359][ T8402] __warn.cold+0x35/0x44 [ 56.421703][ T8402] ? wake_up_klogd.part.0+0x8e/0xd0 [ 56.426915][ T8402] ? submit_bio_checks+0x165c/0x1aa0 [ 56.432388][ T8402] report_bug+0x1bd/0x210 [ 56.436718][ T8402] handle_bug+0x3c/0x60 [ 56.440871][ T8402] exc_invalid_op+0x14/0x40 [ 56.445389][ T8402] asm_exc_invalid_op+0x12/0x20 [ 56.450232][ T8402] RIP: 0010:submit_bio_checks+0x165c/0x1aa0 [ 56.456123][ T8402] Code: 00 00 45 0f b6 a4 24 e0 05 00 00 48 8d 74 24 60 48 89 ef e8 f6 3e fe ff 48 c7 c7 a0 09 c0 89 48 89 c6 44 89 e2 e8 61 fc 0e 05 <0f> 0b e9 36 f3 ff ff e8 e8 14 c1 fd 0f 0b e9 bf f1 ff ff e8 dc 14 [ 56.476097][ T8402] RSP: 0018:ffffc90000eef318 EFLAGS: 00010282 [ 56.482182][ T8402] RAX: 0000000000000000 RBX: ffff888019c06f40 RCX: 0000000000000000 [ 56.490241][ T8402] RDX: ffff888021e1b880 RSI: ffffffff815c4cf5 RDI: fffff520001dde55 [ 56.498906][ T8402] RBP: ffff888011e5ba00 R08: 0000000000000000 R09: 0000000000000000 [ 56.506876][ T8402] R10: ffffffff815bda8e R11: 0000000000000000 R12: 0000000000000000 [ 56.514845][ T8402] R13: ffff888011e5ba10 R14: ffff88801a0a8b80 R15: ffff888019c0744c [ 56.523012][ T8402] ? wake_up_klogd.part.0+0x8e/0xd0 [ 56.528240][ T8402] ? vprintk_func+0x95/0x1e0 [ 56.532831][ T8402] ? submit_bio_checks+0x165c/0x1aa0 [ 56.538232][ T8402] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 56.545193][ T8402] ? __lock_acquire+0xb43/0x54c0 [ 56.550133][ T8402] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 56.556137][ T8402] submit_bio_noacct+0x81/0xf20 [ 56.561019][ T8402] ? blk_queue_enter+0xb50/0xb50 [ 56.565957][ T8402] ? bio_associate_blkg_from_css+0x563/0xf60 [ 56.571961][ T8402] ? lock_downgrade+0x6e0/0x6e0 [ 56.576829][ T8402] submit_bio+0x263/0x5e0 [ 56.581348][ T8402] ? submit_bio_noacct+0xf20/0xf20 [ 56.586472][ T8402] ? bio_add_page+0x186/0x1f0 [ 56.591165][ T8402] ? __bio_try_merge_page+0x350/0x350 [ 56.596565][ T8402] submit_bh_wbc+0x5eb/0x7f0 [ 56.601416][ T8402] __block_write_full_page+0x86c/0x1340 [ 56.606978][ T8402] ? bdev_disk_changed+0x3c0/0x3c0 [ 56.612176][ T8402] block_write_full_page+0x14d/0x190 [ 56.617473][ T8402] ? bdev_disk_changed+0x3c0/0x3c0 [ 56.622777][ T8402] __writepage+0x60/0x180 [ 56.627109][ T8402] write_cache_pages+0x759/0x11a0 [ 56.632137][ T8402] ? tag_pages_for_writeback+0x450/0x450 [ 56.637897][ T8402] ? clear_page_dirty_for_io+0xa10/0xa10 [ 56.643711][ T8402] ? free_zapped_rcu+0x2b1/0x310 [ 56.648677][ T8402] ? lock_chain_count+0x20/0x20 [ 56.653562][ T8402] ? __lock_acquire+0x16b3/0x54c0 [ 56.658680][ T8402] ? blkdev_readahead+0x20/0x20 [ 56.663538][ T8402] generic_writepages+0xe2/0x150 [ 56.668479][ T8402] ? write_cache_pages+0x11a0/0x11a0 [ 56.673760][ T8402] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 56.679853][ T8402] ? find_held_lock+0x2d/0x110 [ 56.684618][ T8402] do_writepages+0xec/0x290 [ 56.689122][ T8402] ? writeback_set_ratelimit+0x150/0x150 [ 56.695105][ T8402] ? do_raw_spin_lock+0x120/0x2b0 [ 56.700137][ T8402] ? do_raw_spin_unlock+0x171/0x230 [ 56.705511][ T8402] ? _raw_spin_unlock+0x24/0x40 [ 56.710383][ T8402] ? wbc_attach_and_unlock_inode+0x117/0x9e0 [ 56.716470][ T8402] __filemap_fdatawrite_range+0x2a5/0x390 [ 56.722193][ T8402] ? delete_from_page_cache_batch+0xe20/0xe20 [ 56.728262][ T8402] ? blkdev_put+0x86/0x580 [ 56.732679][ T8402] ? lock_downgrade+0x6e0/0x6e0 [ 56.737532][ T8402] filemap_write_and_wait_range+0xe1/0x1c0 [ 56.743354][ T8402] __blkdev_put+0x6b7/0x800 [ 56.747868][ T8402] ? __mutex_unlock_slowpath+0xe2/0x610 [ 56.753407][ T8402] ? freeze_bdev+0x250/0x250 [ 56.757994][ T8402] ? wait_for_completion_io+0x270/0x270 [ 56.763620][ T8402] ? _raw_spin_unlock+0x24/0x40 [ 56.768462][ T8402] ? locks_remove_file+0x312/0x560 [ 56.773568][ T8402] blkdev_put+0x92/0x580 [ 56.777805][ T8402] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 56.784062][ T8402] blkdev_close+0x8c/0xb0 [ 56.788395][ T8402] __fput+0x288/0x920 [ 56.792395][ T8402] ? blkdev_put+0x580/0x580 [ 56.796981][ T8402] task_work_run+0xdd/0x1a0 [ 56.801572][ T8402] do_exit+0xbfc/0x2a60 [ 56.805731][ T8402] ? mm_update_next_owner+0x7a0/0x7a0 [ 56.811189][ T8402] ? lock_downgrade+0x6e0/0x6e0 [ 56.816043][ T8402] do_group_exit+0x125/0x310 [ 56.820628][ T8402] __x64_sys_exit_group+0x3a/0x50 [ 56.825737][ T8402] do_syscall_64+0x2d/0x70 [ 56.830241][ T8402] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 56.836222][ T8402] RIP: 0033:0x43da99 [ 56.840107][ T8402] Code: Unable to access opcode bytes at RIP 0x43da6f. [ 56.846954][ T8402] RSP: 002b:00007ffe6fac5ff8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 56.855446][ T8402] RAX: ffffffffffffffda RBX: 00000000004ae230 RCX: 000000000043da99 [ 56.863496][ T8402] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 56.871737][ T8402] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000400488 [ 56.879979][ T8402] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004ae230 [ 56.887954][ T8402] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 56.899692][ T8402] Kernel Offset: disabled [ 56.904163][ T8402] Rebooting in 86400 seconds..