[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.64' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 56.129204][ T8438] ------------[ cut here ]------------ [ 56.142666][ T8438] Trying to write to read-only block-device nullb0 (partno 0) [ 56.157505][ T8438] WARNING: CPU: 1 PID: 8438 at block/blk-core.c:700 submit_bio_checks+0x160c/0x1a80 [ 56.167716][ T8438] Modules linked in: [ 56.171902][ T8438] CPU: 0 PID: 8438 Comm: syz-executor383 Not tainted 5.14.0-rc7-syzkaller #0 [ 56.183331][ T8438] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.194202][ T8438] RIP: 0010:submit_bio_checks+0x160c/0x1a80 [ 56.200571][ T8438] Code: 00 00 45 0f b6 a4 24 90 05 00 00 48 8d 74 24 60 48 89 ef e8 c6 47 fe ff 48 c7 c7 40 a0 e1 89 48 89 c6 44 89 e2 e8 92 fd 27 05 <0f> 0b e9 86 f3 ff ff e8 98 65 b5 fd e8 23 37 6a 05 31 ff 89 c3 89 executing program [ 56.230334][ T8438] RSP: 0018:ffffc9000164f5b8 EFLAGS: 00010282 [ 56.239166][ T8438] RAX: 0000000000000000 RBX: ffff88814625b940 RCX: 0000000000000000 [ 56.255661][ T8438] RDX: ffff88802ebb3880 RSI: ffffffff815d85b5 RDI: fffff520002c9ea9 executing program executing program executing program executing program executing program [ 56.274893][ T8438] RBP: ffff888026fdfb40 R08: 0000000000000000 R09: 0000000000000000 [ 56.293686][ T8438] R10: ffffffff815d23ee R11: 0000000000000000 R12: 0000000000000000 [ 56.314712][ T8438] R13: ffff888026fdfb50 R14: ffff8881464d3840 R15: ffff88814625beb4 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.324948][ T8438] FS: 00007f49f3c11700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 56.340824][ T8438] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.361057][ T8438] CR2: 00000000200000c0 CR3: 0000000016ed3000 CR4: 0000000000350ef0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.380761][ T8438] Call Trace: [ 56.385673][ T8438] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 56.404613][ T8438] ? __bio_clone_fast+0x40e/0x540 [ 56.412574][ T8438] ? lock_downgrade+0x6e0/0x6e0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.427924][ T8438] ? lock_downgrade+0x6e0/0x6e0 [ 56.436635][ T8438] submit_bio_noacct+0x81/0xf20 [ 56.449941][ T8438] ? lockdep_hardirqs_on+0x79/0x100 [ 56.458119][ T8438] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 56.472761][ T8438] ? ktime_get+0x30b/0x470 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.480060][ T8438] ? blk_queue_enter+0xb60/0xb60 [ 56.495083][ T8438] ? __bio_clone_fast+0x40e/0x540 [ 56.508128][ T8438] __blk_queue_split+0x4b8/0x1550 [ 56.522603][ T8438] ? bio_attempt_discard_merge+0x950/0x950 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.537764][ T8438] ? blk_queue_enter+0x97e/0xb60 [ 56.548831][ T8438] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 56.555283][ T8438] blk_mq_submit_bio+0x1ca/0x1860 [ 56.565640][ T8438] ? blk_mq_try_issue_list_directly+0x940/0x940 [ 56.577106][ T8438] ? mempool_free_pages+0x20/0x20 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.585038][ T8438] ? mempool_alloc+0x153/0x350 [ 56.591709][ T8438] submit_bio_noacct+0xad2/0xf20 [ 56.603346][ T8438] ? blk_queue_enter+0xb60/0xb60 [ 56.618671][ T8438] ? lock_downgrade+0x6e0/0x6e0 [ 56.626530][ T8438] ? memset+0x20/0x40 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.638549][ T8438] ? bio_init+0x76/0x120 [ 56.645830][ T8438] submit_bio+0x1ea/0x470 [ 56.654520][ T8438] ? submit_bio_noacct+0xf20/0xf20 [ 56.661674][ T8438] __blkdev_issue_zero_pages+0x14b/0x3b0 [ 56.670480][ T8438] blkdev_issue_zeroout+0x424/0x4b0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.684008][ T8438] ? __blkdev_issue_zeroout+0x190/0x190 [ 56.697898][ T8438] ? wake_up_var+0x120/0x120 [ 56.704213][ T8438] ? do_raw_spin_unlock+0x171/0x230 [ 56.717046][ T8438] ? _raw_spin_unlock+0x24/0x40 [ 56.727893][ T8438] ? truncate_bdev_range+0x188/0x270 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.741233][ T8438] blkdev_common_ioctl+0xd0d/0x1830 [ 56.755867][ T8438] ? vfs_fileattr_set+0xb50/0xb50 [ 56.768591][ T8438] ? blk_ioctl_discard+0x2e0/0x2e0 [ 56.781071][ T8438] ? lock_downgrade+0x6e0/0x6e0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.791423][ T8438] blkdev_ioctl+0x1ef/0x6d0 [ 56.802190][ T8438] ? blkdev_common_ioctl+0x1830/0x1830 [ 56.809185][ T8438] ? __fget_files+0x23d/0x3e0 [ 56.820788][ T8438] block_ioctl+0xf9/0x140 [ 56.831594][ T8438] ? bd_unlink_disk_holder+0x430/0x430 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.842325][ T8438] __x64_sys_ioctl+0x193/0x200 [ 56.853335][ T8438] do_syscall_64+0x35/0xb0 [ 56.862313][ T8438] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 56.870147][ T8438] RIP: 0033:0x4458c9 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.881413][ T8438] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 56.902101][ T8438] RSP: 002b:00007f49f3c11318 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 56.914596][ T8438] RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 00000000004458c9 [ 56.931374][ T8438] RDX: 0000000020000080 RSI: 000000000000127f RDI: 0000000000000003 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.947417][ T8438] RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000 [ 56.964507][ T8438] R10: 0000000000000000 R11: 0000000000000246 R12: 6c756e2f7665642f [ 56.986186][ T8438] R13: 00007ffcf7414ddf R14: 00007f49f3c11400 R15: 0000000000022000 executing program executing program executing program executing program [ 57.008414][ T8438] Kernel panic - not syncing: panic_on_warn set ... [ 57.015212][ T8438] CPU: 1 PID: 8438 Comm: syz-executor383 Not tainted 5.14.0-rc7-syzkaller #0 [ 57.023976][ T8438] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.034038][ T8438] Call Trace: [ 57.037445][ T8438] dump_stack_lvl+0xcd/0x134 [ 57.042039][ T8438] panic+0x306/0x73d [ 57.045920][ T8438] ? __warn_printk+0xf3/0xf3 [ 57.050499][ T8438] ? __warn.cold+0x1a/0x44 [ 57.054903][ T8438] ? submit_bio_checks+0x160c/0x1a80 [ 57.060263][ T8438] __warn.cold+0x35/0x44 [ 57.064488][ T8438] ? wake_up_klogd.part.0+0x8e/0xd0 [ 57.069673][ T8438] ? submit_bio_checks+0x160c/0x1a80 [ 57.075054][ T8438] report_bug+0x1bd/0x210 [ 57.079377][ T8438] handle_bug+0x3c/0x60 [ 57.083523][ T8438] exc_invalid_op+0x14/0x40 [ 57.088012][ T8438] asm_exc_invalid_op+0x12/0x20 [ 57.092848][ T8438] RIP: 0010:submit_bio_checks+0x160c/0x1a80 [ 57.098728][ T8438] Code: 00 00 45 0f b6 a4 24 90 05 00 00 48 8d 74 24 60 48 89 ef e8 c6 47 fe ff 48 c7 c7 40 a0 e1 89 48 89 c6 44 89 e2 e8 92 fd 27 05 <0f> 0b e9 86 f3 ff ff e8 98 65 b5 fd e8 23 37 6a 05 31 ff 89 c3 89 [ 57.118496][ T8438] RSP: 0018:ffffc9000164f5b8 EFLAGS: 00010282 [ 57.124547][ T8438] RAX: 0000000000000000 RBX: ffff88814625b940 RCX: 0000000000000000 [ 57.132502][ T8438] RDX: ffff88802ebb3880 RSI: ffffffff815d85b5 RDI: fffff520002c9ea9 [ 57.140545][ T8438] RBP: ffff888026fdfb40 R08: 0000000000000000 R09: 0000000000000000 [ 57.148499][ T8438] R10: ffffffff815d23ee R11: 0000000000000000 R12: 0000000000000000 [ 57.156454][ T8438] R13: ffff888026fdfb50 R14: ffff8881464d3840 R15: ffff88814625beb4 [ 57.164413][ T8438] ? wake_up_klogd.part.0+0x8e/0xd0 [ 57.169600][ T8438] ? vprintk+0x95/0x260 [ 57.173747][ T8438] ? submit_bio_checks+0x160c/0x1a80 [ 57.179021][ T8438] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 57.186204][ T8438] ? __bio_clone_fast+0x40e/0x540 [ 57.191218][ T8438] ? lock_downgrade+0x6e0/0x6e0 [ 57.196053][ T8438] ? lock_downgrade+0x6e0/0x6e0 [ 57.200896][ T8438] submit_bio_noacct+0x81/0xf20 [ 57.205733][ T8438] ? lockdep_hardirqs_on+0x79/0x100 [ 57.210923][ T8438] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 57.216897][ T8438] ? ktime_get+0x30b/0x470 [ 57.221297][ T8438] ? blk_queue_enter+0xb60/0xb60 [ 57.226220][ T8438] ? __bio_clone_fast+0x40e/0x540 [ 57.231239][ T8438] __blk_queue_split+0x4b8/0x1550 [ 57.236261][ T8438] ? bio_attempt_discard_merge+0x950/0x950 [ 57.242057][ T8438] ? blk_queue_enter+0x97e/0xb60 [ 57.246986][ T8438] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 57.253216][ T8438] blk_mq_submit_bio+0x1ca/0x1860 [ 57.258229][ T8438] ? blk_mq_try_issue_list_directly+0x940/0x940 [ 57.264465][ T8438] ? mempool_free_pages+0x20/0x20 [ 57.269481][ T8438] ? mempool_alloc+0x153/0x350 [ 57.274236][ T8438] submit_bio_noacct+0xad2/0xf20 [ 57.279336][ T8438] ? blk_queue_enter+0xb60/0xb60 [ 57.284259][ T8438] ? lock_downgrade+0x6e0/0x6e0 [ 57.289104][ T8438] ? memset+0x20/0x40 [ 57.293292][ T8438] ? bio_init+0x76/0x120 [ 57.297542][ T8438] submit_bio+0x1ea/0x470 [ 57.301866][ T8438] ? submit_bio_noacct+0xf20/0xf20 [ 57.306970][ T8438] __blkdev_issue_zero_pages+0x14b/0x3b0 [ 57.312601][ T8438] blkdev_issue_zeroout+0x424/0x4b0 [ 57.317882][ T8438] ? __blkdev_issue_zeroout+0x190/0x190 [ 57.323421][ T8438] ? wake_up_var+0x120/0x120 [ 57.328003][ T8438] ? do_raw_spin_unlock+0x171/0x230 [ 57.333279][ T8438] ? _raw_spin_unlock+0x24/0x40 [ 57.338120][ T8438] ? truncate_bdev_range+0x188/0x270 [ 57.343399][ T8438] blkdev_common_ioctl+0xd0d/0x1830 [ 57.348595][ T8438] ? vfs_fileattr_set+0xb50/0xb50 [ 57.353610][ T8438] ? blk_ioctl_discard+0x2e0/0x2e0 [ 57.358805][ T8438] ? lock_downgrade+0x6e0/0x6e0 [ 57.363649][ T8438] blkdev_ioctl+0x1ef/0x6d0 [ 57.368143][ T8438] ? blkdev_common_ioctl+0x1830/0x1830 [ 57.373597][ T8438] ? __fget_files+0x23d/0x3e0 [ 57.378267][ T8438] block_ioctl+0xf9/0x140 [ 57.382593][ T8438] ? bd_unlink_disk_holder+0x430/0x430 [ 57.388046][ T8438] __x64_sys_ioctl+0x193/0x200 [ 57.392838][ T8438] do_syscall_64+0x35/0xb0 [ 57.397249][ T8438] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 57.403399][ T8438] RIP: 0033:0x4458c9 [ 57.407283][ T8438] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 57.427056][ T8438] RSP: 002b:00007f49f3c11318 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 57.435815][ T8438] RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 00000000004458c9 [ 57.443775][ T8438] RDX: 0000000020000080 RSI: 000000000000127f RDI: 0000000000000003 [ 57.451732][ T8438] RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000 [ 57.459691][ T8438] R10: 0000000000000000 R11: 0000000000000246 R12: 6c756e2f7665642f [ 57.467937][ T8438] R13: 00007ffcf7414ddf R14: 00007f49f3c11400 R15: 0000000000022000 [ 57.481544][ T8438] Kernel Offset: disabled [ 57.486234][ T8438] Rebooting in 86400 seconds..