[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.229' (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 syzkaller login: [ 72.863720][ T10] ------------[ cut here ]------------ [ 72.870184][ T10] Trying to write to read-only block-device sda1 (partno 1) [ 72.882103][ T10] WARNING: CPU: 0 PID: 10 at block/blk-core.c:701 submit_bio_checks+0x160c/0x1a80 [ 72.891773][ T10] Modules linked in: [ 72.908434][ T10] CPU: 0 PID: 10 Comm: kworker/u4:1 Not tainted 5.14.0-rc3-next-20210726-syzkaller #0 [ 72.918936][ T10] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.929509][ T10] Workqueue: writeback wb_workfn (flush-8:0) [ 72.935807][ T10] RIP: 0010:submit_bio_checks+0x160c/0x1a80 [ 72.941778][ T10] Code: 00 00 45 0f b6 a4 24 58 05 00 00 48 8d 74 24 60 48 89 ef e8 36 48 fe ff 48 c7 c7 c0 d2 e1 89 48 89 c6 44 89 e2 e8 ab 9f 2b 05 <0f> 0b e9 86 f3 ff ff e8 c8 25 b7 fd e8 93 15 6e 05 31 ff 89 c3 89 executing program [ 72.963054][ T10] RSP: 0018:ffffc90000cf70a8 EFLAGS: 00010286 [ 72.969290][ T10] RAX: 0000000000000000 RBX: ffff88801ef09ca0 RCX: 0000000000000000 [ 72.978565][ T10] RDX: ffff888010e79c80 RSI: ffffffff815d8f35 RDI: fffff5200019ee07 [ 72.988068][ T10] RBP: ffff888012d9a8c0 R08: 0000000000000000 R09: 0000000000000000 [ 72.997949][ T10] R10: ffffffff815d29be R11: 0000000000000000 R12: 0000000000000001 [ 73.006962][ T10] R13: ffff888012d9a8d0 R14: ffff88801a8d8000 R15: ffff88801ef0a214 [ 73.015537][ T10] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 73.024828][ T10] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.031532][ T10] CR2: 00005647f0000948 CR3: 00000000164c3000 CR4: 00000000001506e0 [ 73.040104][ T10] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.048457][ T10] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.048507][ T10] Call Trace: executing program [ 73.048523][ T10] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 73.066725][ T10] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 73.085206][ T10] ? __ext4_handle_dirty_metadata+0x23b/0x720 [ 73.091390][ T10] ? __brelse+0x84/0xa0 [ 73.096020][ T10] submit_bio_noacct+0x81/0xf20 [ 73.100963][ T10] ? blk_queue_enter+0xb60/0xb60 [ 73.106476][ T10] ? ext4_reserve_inode_write+0x114/0x230 executing program [ 73.112988][ T10] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 73.118772][ T10] ? mpage_release_unused_pages+0x5ef/0x8a0 [ 73.126242][ T10] ? x86_pmu_event_init+0x92c/0xa90 [ 73.132371][ T10] ? ext4_set_iomap+0xa70/0xa70 [ 73.137274][ T10] submit_bio+0x1ea/0x470 [ 73.141621][ T10] ? submit_bio_noacct+0xf20/0xf20 [ 73.152672][ T10] ? downgrade_write+0x3a0/0x3a0 [ 73.157652][ T10] ? down_write_killable_nested+0x180/0x180 executing program [ 73.164180][ T10] ext4_io_submit+0x181/0x210 [ 73.168895][ T10] ext4_writepages+0x1452/0x3ba0 [ 73.174400][ T10] ? __ext4_mark_inode_dirty+0x8d0/0x8d0 [ 73.180048][ T10] ? __find_get_block+0x70b/0xdb0 [ 73.185488][ T10] ? lock_downgrade+0x6e0/0x6e0 [ 73.190390][ T10] ? lock_chain_count+0x20/0x20 [ 73.196621][ T10] ? mark_held_locks+0x9f/0xe0 [ 73.201489][ T10] ? __lock_acquire+0x162f/0x54a0 [ 73.206902][ T10] ? __ext4_mark_inode_dirty+0x8d0/0x8d0 [ 73.212946][ T10] do_writepages+0x1ab/0x770 [ 73.217579][ T10] ? writeback_set_ratelimit+0x150/0x150 [ 73.224352][ T10] ? find_held_lock+0x2d/0x110 [ 73.229192][ T10] ? wbc_attach_and_unlock_inode+0x111/0x9d0 [ 73.247588][ T10] ? lock_downgrade+0x6e0/0x6e0 [ 73.253236][ T10] ? writeback_sb_inodes+0x3a6/0xf00 [ 73.258599][ T10] __writeback_single_inode+0x126/0xff0 executing program [ 73.264676][ T10] ? wbc_attach_and_unlock_inode+0x111/0x9d0 [ 73.270911][ T10] writeback_sb_inodes+0x53d/0xf00 [ 73.276480][ T10] ? sync_inode_metadata+0xd0/0xd0 [ 73.281618][ T10] ? lock_release+0x720/0x720 [ 73.287090][ T10] __writeback_inodes_wb+0xc6/0x280 [ 73.292749][ T10] wb_writeback+0x7f8/0xc30 [ 73.297369][ T10] ? __writeback_inodes_wb+0x280/0x280 [ 73.303353][ T10] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.309720][ T10] ? cpumask_next+0xa4/0xf0 [ 73.314745][ T10] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 73.331330][ T10] ? get_nr_dirty_inodes+0x16f/0x210 [ 73.337828][ T10] wb_workfn+0x8cf/0x12d0 [ 73.342746][ T10] ? inode_wait_for_writeback+0x30/0x30 [ 73.348337][ T10] ? lock_release+0x720/0x720 [ 73.353583][ T10] process_one_work+0x98d/0x1630 [ 73.358542][ T10] ? pwq_dec_nr_in_flight+0x320/0x320 executing program [ 73.364361][ T10] ? rwlock_bug.part.0+0x90/0x90 [ 73.369336][ T10] ? _raw_spin_lock_irq+0x41/0x50 [ 73.374936][ T10] worker_thread+0x658/0x11f0 [ 73.379647][ T10] ? process_one_work+0x1630/0x1630 [ 73.385424][ T10] kthread+0x3e5/0x4d0 [ 73.400049][ T10] ? set_kthread_struct+0x130/0x130 [ 73.406931][ T10] ret_from_fork+0x1f/0x30 executing program [ 73.411370][ T10] Kernel panic - not syncing: panic_on_warn set ... [ 73.417937][ T10] CPU: 0 PID: 10 Comm: kworker/u4:1 Not tainted 5.14.0-rc3-next-20210726-syzkaller #0 [ 73.427462][ T10] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.437590][ T10] Workqueue: writeback wb_workfn (flush-8:0) [ 73.443685][ T10] Call Trace: [ 73.446969][ T10] dump_stack_lvl+0xcd/0x134 [ 73.451581][ T10] panic+0x306/0x73d [ 73.455488][ T10] ? __warn_printk+0xf3/0xf3 [ 73.460084][ T10] ? __warn.cold+0x1a/0x44 [ 73.464579][ T10] ? submit_bio_checks+0x160c/0x1a80 [ 73.469942][ T10] __warn.cold+0x35/0x44 [ 73.474186][ T10] ? wake_up_klogd.part.0+0x8e/0xd0 [ 73.479371][ T10] ? submit_bio_checks+0x160c/0x1a80 [ 73.484735][ T10] report_bug+0x1bd/0x210 [ 73.489059][ T10] handle_bug+0x3c/0x60 [ 73.493304][ T10] exc_invalid_op+0x14/0x40 [ 73.497797][ T10] asm_exc_invalid_op+0x12/0x20 [ 73.502639][ T10] RIP: 0010:submit_bio_checks+0x160c/0x1a80 [ 73.508519][ T10] Code: 00 00 45 0f b6 a4 24 58 05 00 00 48 8d 74 24 60 48 89 ef e8 36 48 fe ff 48 c7 c7 c0 d2 e1 89 48 89 c6 44 89 e2 e8 ab 9f 2b 05 <0f> 0b e9 86 f3 ff ff e8 c8 25 b7 fd e8 93 15 6e 05 31 ff 89 c3 89 [ 73.528469][ T10] RSP: 0018:ffffc90000cf70a8 EFLAGS: 00010286 [ 73.534611][ T10] RAX: 0000000000000000 RBX: ffff88801ef09ca0 RCX: 0000000000000000 [ 73.542566][ T10] RDX: ffff888010e79c80 RSI: ffffffff815d8f35 RDI: fffff5200019ee07 [ 73.550785][ T10] RBP: ffff888012d9a8c0 R08: 0000000000000000 R09: 0000000000000000 [ 73.558743][ T10] R10: ffffffff815d29be R11: 0000000000000000 R12: 0000000000000001 [ 73.567050][ T10] R13: ffff888012d9a8d0 R14: ffff88801a8d8000 R15: ffff88801ef0a214 [ 73.575109][ T10] ? wake_up_klogd.part.0+0x8e/0xd0 [ 73.580320][ T10] ? vprintk+0x95/0x260 [ 73.584585][ T10] ? submit_bio_checks+0x160c/0x1a80 [ 73.589867][ T10] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 73.596188][ T10] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 73.603126][ T10] ? __ext4_handle_dirty_metadata+0x23b/0x720 [ 73.609363][ T10] ? __brelse+0x84/0xa0 [ 73.613687][ T10] submit_bio_noacct+0x81/0xf20 [ 73.618534][ T10] ? blk_queue_enter+0xb60/0xb60 [ 73.623455][ T10] ? ext4_reserve_inode_write+0x114/0x230 [ 73.629168][ T10] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 73.634965][ T10] ? mpage_release_unused_pages+0x5ef/0x8a0 [ 73.640850][ T10] ? x86_pmu_event_init+0x92c/0xa90 [ 73.646072][ T10] ? ext4_set_iomap+0xa70/0xa70 [ 73.651005][ T10] submit_bio+0x1ea/0x470 [ 73.655321][ T10] ? submit_bio_noacct+0xf20/0xf20 [ 73.660426][ T10] ? downgrade_write+0x3a0/0x3a0 [ 73.665446][ T10] ? down_write_killable_nested+0x180/0x180 [ 73.671684][ T10] ext4_io_submit+0x181/0x210 [ 73.676626][ T10] ext4_writepages+0x1452/0x3ba0 [ 73.681580][ T10] ? __ext4_mark_inode_dirty+0x8d0/0x8d0 [ 73.687203][ T10] ? __find_get_block+0x70b/0xdb0 [ 73.692218][ T10] ? lock_downgrade+0x6e0/0x6e0 [ 73.697085][ T10] ? lock_chain_count+0x20/0x20 [ 73.701930][ T10] ? mark_held_locks+0x9f/0xe0 [ 73.706819][ T10] ? __lock_acquire+0x162f/0x54a0 [ 73.712117][ T10] ? __ext4_mark_inode_dirty+0x8d0/0x8d0 [ 73.717826][ T10] do_writepages+0x1ab/0x770 [ 73.722418][ T10] ? writeback_set_ratelimit+0x150/0x150 [ 73.728219][ T10] ? find_held_lock+0x2d/0x110 [ 73.733851][ T10] ? wbc_attach_and_unlock_inode+0x111/0x9d0 [ 73.739840][ T10] ? lock_downgrade+0x6e0/0x6e0 [ 73.744682][ T10] ? writeback_sb_inodes+0x3a6/0xf00 [ 73.750154][ T10] __writeback_single_inode+0x126/0xff0 [ 73.755866][ T10] ? wbc_attach_and_unlock_inode+0x111/0x9d0 [ 73.761938][ T10] writeback_sb_inodes+0x53d/0xf00 [ 73.767142][ T10] ? sync_inode_metadata+0xd0/0xd0 [ 73.772340][ T10] ? lock_release+0x720/0x720 [ 73.777100][ T10] __writeback_inodes_wb+0xc6/0x280 [ 73.782390][ T10] wb_writeback+0x7f8/0xc30 [ 73.786887][ T10] ? __writeback_inodes_wb+0x280/0x280 [ 73.792342][ T10] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.798572][ T10] ? cpumask_next+0xa4/0xf0 [ 73.803073][ T10] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 73.808778][ T10] ? get_nr_dirty_inodes+0x16f/0x210 [ 73.814058][ T10] wb_workfn+0x8cf/0x12d0 [ 73.818385][ T10] ? inode_wait_for_writeback+0x30/0x30 [ 73.823936][ T10] ? lock_release+0x720/0x720 [ 73.828628][ T10] process_one_work+0x98d/0x1630 [ 73.833585][ T10] ? pwq_dec_nr_in_flight+0x320/0x320 [ 73.838957][ T10] ? rwlock_bug.part.0+0x90/0x90 [ 73.843883][ T10] ? _raw_spin_lock_irq+0x41/0x50 [ 73.848907][ T10] worker_thread+0x658/0x11f0 [ 73.853599][ T10] ? process_one_work+0x1630/0x1630 [ 73.858802][ T10] kthread+0x3e5/0x4d0 [ 73.862861][ T10] ? set_kthread_struct+0x130/0x130 [ 73.868053][ T10] ret_from_fork+0x1f/0x30 [ 73.874129][ T10] Kernel Offset: disabled [ 73.878566][ T10] Rebooting in 86400 seconds..