[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ 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 '10.128.10.6' (ECDSA) to the list of known hosts. 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 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 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 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 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 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 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 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 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 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 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 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 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 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 92.485023][ T25] ------------[ cut here ]------------ [ 92.491393][ T25] Trying to write to read-only block-device sda1 (partno 1) [ 92.502529][ T25] WARNING: CPU: 1 PID: 25 at block/blk-core.c:704 submit_bio_checks+0x165c/0x1aa0 [ 92.513288][ T25] Modules linked in: [ 92.519882][ T25] CPU: 1 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-rc4-next-20210326-syzkaller #0 [ 92.530954][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.541664][ T25] Workqueue: writeback wb_workfn (flush-8:0) [ 92.547854][ T25] RIP: 0010:submit_bio_checks+0x165c/0x1aa0 [ 92.553804][ T25] Code: 00 00 45 0f b6 a4 24 e0 05 00 00 48 8d 74 24 60 48 89 ef e8 a6 3f fe ff 48 c7 c7 00 6d c0 89 48 89 c6 44 89 e2 e8 b7 a9 14 05 <0f> 0b e9 36 f3 ff ff e8 58 59 be fd 0f 0b e9 bf f1 ff ff e8 4c 59 [ 92.574718][ T25] RSP: 0018:ffffc90000dff0a8 EFLAGS: 00010286 executing program [ 92.580941][ T25] RAX: 0000000000000000 RBX: ffff8881433829b8 RCX: 0000000000000000 [ 92.589859][ T25] RDX: ffff888011c43900 RSI: ffffffff815c3fd5 RDI: fffff520001bfe07 [ 92.598694][ T25] RBP: ffff8880235ee000 R08: 0000000000000000 R09: 0000000000000000 [ 92.608141][ T25] R10: ffffffff815bd77e R11: 0000000000000000 R12: 0000000000000001 [ 92.622983][ T25] R13: ffff8880235ee010 R14: ffff88801aa30b80 R15: ffff888143382ec4 [ 92.631905][ T25] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 92.641553][ T25] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.648317][ T25] CR2: 0000559929eb3908 CR3: 000000001515b000 CR4: 00000000001506f0 [ 92.656359][ T25] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.664341][ T25] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.672989][ T25] Call Trace: [ 92.676500][ T25] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 executing program [ 92.683662][ T25] ? __lock_acquire+0xb3a/0x5230 [ 92.688848][ T25] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 92.696004][ T25] submit_bio_noacct+0x81/0xf20 [ 92.700938][ T25] ? blk_queue_enter+0xb50/0xb50 [ 92.715264][ T25] ? bio_associate_blkg_from_css+0x563/0xf60 [ 92.721497][ T25] ? lock_downgrade+0x6e0/0x6e0 executing program [ 92.733031][ T25] submit_bio+0x263/0x5e0 [ 92.737842][ T25] ? submit_bio_noacct+0xf20/0xf20 [ 92.742997][ T25] ? bio_add_page+0x186/0x1f0 [ 92.747880][ T25] ? __bio_try_merge_page+0x350/0x350 [ 92.753294][ T25] submit_bh_wbc+0x5eb/0x7f0 [ 92.758013][ T25] __block_write_full_page+0x86c/0x1340 [ 92.763600][ T25] ? bdev_disk_changed+0x3c0/0x3c0 [ 92.770232][ T25] block_write_full_page+0x14d/0x190 [ 92.784645][ T25] ? bdev_disk_changed+0x3c0/0x3c0 [ 92.789843][ T25] __writepage+0x60/0x180 [ 92.797892][ T25] write_cache_pages+0x759/0x11a0 [ 92.803073][ T25] ? tag_pages_for_writeback+0x450/0x450 [ 92.810402][ T25] ? clear_page_dirty_for_io+0xa10/0xa10 [ 92.816717][ T25] ? __lock_acquire+0x16a7/0x5230 [ 92.822263][ T25] ? blkdev_readahead+0x20/0x20 [ 92.827404][ T25] generic_writepages+0xe2/0x150 executing program [ 92.832376][ T25] ? write_cache_pages+0x11a0/0x11a0 [ 92.838538][ T25] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 92.844952][ T25] ? mark_lock+0xef/0x17b0 [ 92.849415][ T25] do_writepages+0xec/0x290 [ 92.854200][ T25] ? writeback_set_ratelimit+0x150/0x150 [ 92.859999][ T25] ? lock_downgrade+0x6e0/0x6e0 [ 92.866623][ T25] ? writeback_sb_inodes+0x3a6/0xef0 [ 92.874029][ T25] __writeback_single_inode+0x126/0xfd0 [ 92.879760][ T25] ? wbc_attach_and_unlock_inode+0x117/0x9e0 [ 92.886922][ T25] writeback_sb_inodes+0x53d/0xef0 [ 92.892125][ T25] ? __writeback_single_inode+0xfd0/0xfd0 [ 92.898097][ T25] __writeback_inodes_wb+0xc6/0x280 [ 92.903351][ T25] wb_writeback+0x814/0xc40 [ 92.908305][ T25] ? __writeback_inodes_wb+0x280/0x280 [ 92.913806][ T25] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 92.920007][ T25] ? cpumask_next+0x3c/0x40 [ 92.924933][ T25] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 92.930696][ T25] ? get_nr_dirty_inodes+0x16f/0x210 executing program [ 92.936143][ T25] wb_workfn+0x891/0x12d0 [ 92.940550][ T25] ? inode_wait_for_writeback+0x30/0x30 [ 92.946369][ T25] ? lock_release+0x720/0x720 [ 92.951243][ T25] process_one_work+0x98d/0x1600 [ 92.956547][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 92.962115][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 92.967260][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 92.972340][ T25] worker_thread+0x64c/0x1120 [ 92.977842][ T25] ? process_one_work+0x1600/0x1600 [ 92.994602][ T25] kthread+0x3b1/0x4a0 [ 92.998749][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 93.003891][ T25] ret_from_fork+0x1f/0x30 [ 93.011806][ T25] Kernel panic - not syncing: panic_on_warn set ... [ 93.019329][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-rc4-next-20210326-syzkaller #0 [ 93.028997][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.039096][ T25] Workqueue: writeback wb_workfn (flush-8:0) executing program [ 93.045112][ T25] Call Trace: [ 93.048403][ T25] dump_stack+0x141/0x1d7 [ 93.052763][ T25] panic+0x306/0x73d [ 93.056676][ T25] ? __warn_printk+0xf3/0xf3 [ 93.061292][ T25] ? __warn.cold+0x1a/0x44 [ 93.065753][ T25] ? submit_bio_checks+0x165c/0x1aa0 [ 93.071059][ T25] __warn.cold+0x35/0x44 [ 93.075318][ T25] ? wake_up_klogd.part.0+0x8e/0xd0 [ 93.080532][ T25] ? submit_bio_checks+0x165c/0x1aa0 [ 93.085821][ T25] report_bug+0x1bd/0x210 [ 93.090152][ T25] handle_bug+0x3c/0x60 executing program [ 93.094297][ T25] exc_invalid_op+0x14/0x40 [ 93.098789][ T25] asm_exc_invalid_op+0x12/0x20 [ 93.103637][ T25] RIP: 0010:submit_bio_checks+0x165c/0x1aa0 [ 93.109525][ T25] Code: 00 00 45 0f b6 a4 24 e0 05 00 00 48 8d 74 24 60 48 89 ef e8 a6 3f fe ff 48 c7 c7 00 6d c0 89 48 89 c6 44 89 e2 e8 b7 a9 14 05 <0f> 0b e9 36 f3 ff ff e8 58 59 be fd 0f 0b e9 bf f1 ff ff e8 4c 59 [ 93.130187][ T25] RSP: 0018:ffffc90000dff0a8 EFLAGS: 00010286 [ 93.136288][ T25] RAX: 0000000000000000 RBX: ffff8881433829b8 RCX: 0000000000000000 [ 93.144317][ T25] RDX: ffff888011c43900 RSI: ffffffff815c3fd5 RDI: fffff520001bfe07 [ 93.152400][ T25] RBP: ffff8880235ee000 R08: 0000000000000000 R09: 0000000000000000 [ 93.160392][ T25] R10: ffffffff815bd77e R11: 0000000000000000 R12: 0000000000000001 [ 93.168380][ T25] R13: ffff8880235ee010 R14: ffff88801aa30b80 R15: ffff888143382ec4 [ 93.176393][ T25] ? wake_up_klogd.part.0+0x8e/0xd0 [ 93.181601][ T25] ? vprintk_func+0x95/0x260 [ 93.186192][ T25] ? submit_bio_checks+0x165c/0x1aa0 executing program [ 93.191562][ T25] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 93.198487][ T25] ? __lock_acquire+0xb3a/0x5230 [ 93.203413][ T25] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 93.209398][ T25] submit_bio_noacct+0x81/0xf20 [ 93.214291][ T25] ? blk_queue_enter+0xb50/0xb50 [ 93.219285][ T25] ? bio_associate_blkg_from_css+0x563/0xf60 [ 93.225477][ T25] ? lock_downgrade+0x6e0/0x6e0 [ 93.230369][ T25] submit_bio+0x263/0x5e0 [ 93.234816][ T25] ? submit_bio_noacct+0xf20/0xf20 [ 93.239951][ T25] ? bio_add_page+0x186/0x1f0 executing program [ 93.244656][ T25] ? __bio_try_merge_page+0x350/0x350 [ 93.250078][ T25] submit_bh_wbc+0x5eb/0x7f0 [ 93.254677][ T25] __block_write_full_page+0x86c/0x1340 [ 93.260235][ T25] ? bdev_disk_changed+0x3c0/0x3c0 [ 93.265345][ T25] block_write_full_page+0x14d/0x190 [ 93.270621][ T25] ? bdev_disk_changed+0x3c0/0x3c0 [ 93.275740][ T25] __writepage+0x60/0x180 [ 93.280069][ T25] write_cache_pages+0x759/0x11a0 [ 93.285089][ T25] ? tag_pages_for_writeback+0x450/0x450 [ 93.290742][ T25] ? clear_page_dirty_for_io+0xa10/0xa10 [ 93.296398][ T25] ? __lock_acquire+0x16a7/0x5230 [ 93.301474][ T25] ? blkdev_readahead+0x20/0x20 [ 93.306351][ T25] generic_writepages+0xe2/0x150 [ 93.311314][ T25] ? write_cache_pages+0x11a0/0x11a0 [ 93.316895][ T25] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 93.322907][ T25] ? mark_lock+0xef/0x17b0 [ 93.327375][ T25] do_writepages+0xec/0x290 [ 93.331901][ T25] ? writeback_set_ratelimit+0x150/0x150 [ 93.337535][ T25] ? lock_downgrade+0x6e0/0x6e0 executing program [ 93.342388][ T25] ? writeback_sb_inodes+0x3a6/0xef0 [ 93.347953][ T25] __writeback_single_inode+0x126/0xfd0 [ 93.353535][ T25] ? wbc_attach_and_unlock_inode+0x117/0x9e0 [ 93.359542][ T25] writeback_sb_inodes+0x53d/0xef0 [ 93.364668][ T25] ? __writeback_single_inode+0xfd0/0xfd0 [ 93.370411][ T25] __writeback_inodes_wb+0xc6/0x280 [ 93.375642][ T25] wb_writeback+0x814/0xc40 [ 93.380181][ T25] ? __writeback_inodes_wb+0x280/0x280 [ 93.385666][ T25] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 93.391427][ T25] ? cpumask_next+0x3c/0x40 [ 93.395954][ T25] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 93.401701][ T25] ? get_nr_dirty_inodes+0x16f/0x210 [ 93.407010][ T25] wb_workfn+0x891/0x12d0 [ 93.411346][ T25] ? inode_wait_for_writeback+0x30/0x30 [ 93.416886][ T25] ? lock_release+0x720/0x720 [ 93.421563][ T25] process_one_work+0x98d/0x1600 [ 93.426494][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 93.431854][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 93.436785][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 93.441822][ T25] worker_thread+0x64c/0x1120 executing program [ 93.446531][ T25] ? process_one_work+0x1600/0x1600 [ 93.451750][ T25] kthread+0x3b1/0x4a0 [ 93.455845][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 93.460982][ T25] ret_from_fork+0x1f/0x30 [ 93.466273][ T25] Kernel Offset: disabled [ 93.470735][ T25] Rebooting in 86400 seconds..