[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.166' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 69.946303][ T6598] ------------[ cut here ]------------ [ 69.951996][ T6598] Trying to write to read-only block-device nullb0 (partno 0) [ 69.961821][ T6598] WARNING: CPU: 1 PID: 6598 at block/blk-core.c:701 submit_bio_checks+0x160c/0x1a80 [ 69.971504][ T6598] Modules linked in: [ 69.977141][ T6598] CPU: 0 PID: 6598 Comm: syz-executor668 Not tainted 5.14.0-rc3-next-20210730-syzkaller #0 [ 69.988739][ T6598] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.999930][ T6598] RIP: 0010:submit_bio_checks+0x160c/0x1a80 [ 70.006689][ T6598] Code: 00 00 45 0f b6 a4 24 58 05 00 00 48 8d 74 24 60 48 89 ef e8 b6 4a fe ff 48 c7 c7 80 e2 e1 89 48 89 c6 44 89 e2 e8 f2 5d 2c 05 <0f> 0b e9 86 f3 ff ff e8 e8 f4 b6 fd e8 d3 ec 6e 05 31 ff 89 c3 89 [ 70.026960][ T6598] RSP: 0018:ffffc90002e2f408 EFLAGS: 00010286 [ 70.033212][ T6598] RAX: 0000000000000000 RBX: ffff88801bb4d5e0 RCX: 0000000000000000 [ 70.043099][ T6598] RDX: ffff8880745b0000 RSI: ffffffff815d8978 RDI: fffff520005c5e73 [ 70.051712][ T6598] RBP: ffff888019d20500 R08: 0000000000000000 R09: 0000000000000000 [ 70.060085][ T6598] R10: ffffffff815d271e R11: 0000000000000000 R12: 0000000000000000 [ 70.068660][ T6598] R13: ffff888019d20510 R14: ffff88801759e780 R15: ffff88801bb4db54 [ 70.076858][ T6598] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 70.086455][ T6598] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.093240][ T6598] CR2: 00007f2970fc7740 CR3: 000000000b68e000 CR4: 00000000001506e0 [ 70.103092][ T6598] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.111904][ T6598] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.120362][ T6598] Call Trace: [ 70.124048][ T6598] ? __lock_acquire+0xbc2/0x54a0 [ 70.129628][ T6598] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 70.137062][ T6598] submit_bio_noacct+0x81/0xf20 [ 70.141952][ T6598] ? blk_queue_enter+0xb60/0xb60 [ 70.147037][ T6598] ? lock_downgrade+0x6e0/0x6e0 [ 70.152032][ T6598] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 70.159031][ T6598] ? __bio_add_page+0x377/0x540 [ 70.163907][ T6598] submit_bio+0x1ea/0x470 [ 70.168622][ T6598] ? submit_bio_noacct+0xf20/0xf20 [ 70.173932][ T6598] submit_bh_wbc+0x5eb/0x7f0 [ 70.179622][ T6598] __block_write_full_page+0x877/0x1360 [ 70.185437][ T6598] ? bdev_evict_inode+0x4a0/0x4a0 [ 70.190486][ T6598] block_write_full_page+0x14d/0x190 [ 70.195943][ T6598] ? bdev_evict_inode+0x4a0/0x4a0 [ 70.201078][ T6598] __writepage+0x60/0x180 [ 70.205644][ T6598] write_cache_pages+0x763/0x11a0 [ 70.210812][ T6598] ? folio_mark_dirty+0x1c0/0x1c0 [ 70.216241][ T6598] ? __folio_cancel_dirty+0x690/0x690 [ 70.221737][ T6598] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 70.228113][ T6598] ? unwind_next_frame+0xec8/0x1ce0 [ 70.233720][ T6598] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 70.240248][ T6598] ? find_held_lock+0x2d/0x110 [ 70.245383][ T6598] ? blkdev_readahead+0x20/0x20 [ 70.250654][ T6598] generic_writepages+0xe2/0x150 [ 70.255812][ T6598] ? write_cache_pages+0x11a0/0x11a0 [ 70.261145][ T6598] ? lock_downgrade+0x6e0/0x6e0 [ 70.266623][ T6598] do_writepages+0x1ab/0x770 [ 70.271504][ T6598] ? writeback_set_ratelimit+0x150/0x150 [ 70.277247][ T6598] ? wbc_attach_and_unlock_inode+0x111/0x9d0 [ 70.283264][ T6598] ? lock_downgrade+0x6e0/0x6e0 [ 70.288727][ T6598] ? lock_release+0x720/0x720 [ 70.293555][ T6598] ? do_raw_spin_lock+0x120/0x2b0 [ 70.298702][ T6598] ? do_raw_spin_unlock+0x171/0x230 [ 70.303950][ T6598] ? _raw_spin_unlock+0x24/0x40 [ 70.308938][ T6598] ? wbc_attach_and_unlock_inode+0x111/0x9d0 [ 70.315108][ T6598] filemap_fdatawrite_wbc+0x1d2/0x2b0 [ 70.320504][ T6598] filemap_write_and_wait_range+0xe1/0x1a0 [ 70.326434][ T6598] ? xas_reload+0x440/0x440 [ 70.330957][ T6598] ? _raw_spin_unlock+0x24/0x40 [ 70.336120][ T6598] ? locks_remove_file+0x2f9/0x570 [ 70.341315][ T6598] blkdev_put+0x753/0x9e0 [ 70.345788][ T6598] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 70.352252][ T6598] blkdev_close+0x8c/0xb0 [ 70.356684][ T6598] __fput+0x288/0x920 [ 70.360706][ T6598] ? blkdev_put+0x9e0/0x9e0 [ 70.365501][ T6598] task_work_run+0xdd/0x1a0 [ 70.371092][ T6598] do_exit+0xbd4/0x2a60 [ 70.375414][ T6598] ? __context_tracking_exit+0xb8/0xe0 [ 70.381155][ T6598] ? lock_downgrade+0x6e0/0x6e0 [ 70.386127][ T6598] ? lock_downgrade+0x6e0/0x6e0 [ 70.391135][ T6598] ? mm_update_next_owner+0x7a0/0x7a0 [ 70.396707][ T6598] do_group_exit+0x125/0x310 [ 70.401328][ T6598] __x64_sys_exit_group+0x3a/0x50 [ 70.406647][ T6598] do_syscall_64+0x35/0xb0 [ 70.411184][ T6598] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 70.417463][ T6598] RIP: 0033:0x43da59 [ 70.421367][ T6598] Code: Unable to access opcode bytes at RIP 0x43da2f. [ 70.428433][ T6598] RSP: 002b:00007ffc4966f348 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 70.437132][ T6598] RAX: ffffffffffffffda RBX: 00000000004ae230 RCX: 000000000043da59 [ 70.445379][ T6598] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 70.453576][ T6598] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000000 [ 70.461628][ T6598] R10: 0000000000000003 R11: 0000000000000246 R12: 00000000004ae230 [ 70.470759][ T6598] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 70.479199][ T6598] Kernel panic - not syncing: panic_on_warn set ... [ 70.485998][ T6598] CPU: 1 PID: 6598 Comm: syz-executor668 Not tainted 5.14.0-rc3-next-20210730-syzkaller #0 [ 70.496637][ T6598] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.506877][ T6598] Call Trace: [ 70.510249][ T6598] dump_stack_lvl+0xcd/0x134 [ 70.515412][ T6598] panic+0x2b0/0x6dd [ 70.519305][ T6598] ? __warn_printk+0xf3/0xf3 [ 70.523979][ T6598] ? __warn.cold+0x1a/0x44 [ 70.528396][ T6598] ? submit_bio_checks+0x160c/0x1a80 [ 70.533935][ T6598] __warn.cold+0x35/0x44 [ 70.538167][ T6598] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 70.544763][ T6598] ? submit_bio_checks+0x160c/0x1a80 [ 70.550127][ T6598] report_bug+0x1bd/0x210 [ 70.554453][ T6598] handle_bug+0x3c/0x60 [ 70.558722][ T6598] exc_invalid_op+0x14/0x40 [ 70.563247][ T6598] asm_exc_invalid_op+0x12/0x20 [ 70.568134][ T6598] RIP: 0010:submit_bio_checks+0x160c/0x1a80 [ 70.575424][ T6598] Code: 00 00 45 0f b6 a4 24 58 05 00 00 48 8d 74 24 60 48 89 ef e8 b6 4a fe ff 48 c7 c7 80 e2 e1 89 48 89 c6 44 89 e2 e8 f2 5d 2c 05 <0f> 0b e9 86 f3 ff ff e8 e8 f4 b6 fd e8 d3 ec 6e 05 31 ff 89 c3 89 [ 70.595475][ T6598] RSP: 0018:ffffc90002e2f408 EFLAGS: 00010286 [ 70.601620][ T6598] RAX: 0000000000000000 RBX: ffff88801bb4d5e0 RCX: 0000000000000000 [ 70.609668][ T6598] RDX: ffff8880745b0000 RSI: ffffffff815d8978 RDI: fffff520005c5e73 [ 70.617819][ T6598] RBP: ffff888019d20500 R08: 0000000000000000 R09: 0000000000000000 [ 70.625894][ T6598] R10: ffffffff815d271e R11: 0000000000000000 R12: 0000000000000000 [ 70.634567][ T6598] R13: ffff888019d20510 R14: ffff88801759e780 R15: ffff88801bb4db54 [ 70.643035][ T6598] ? wake_up_klogd.part.0+0x8e/0xd0 [ 70.648615][ T6598] ? vprintk+0x88/0x90 [ 70.652713][ T6598] ? submit_bio_checks+0x160c/0x1a80 [ 70.658024][ T6598] ? __lock_acquire+0xbc2/0x54a0 [ 70.662987][ T6598] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 70.670313][ T6598] submit_bio_noacct+0x81/0xf20 [ 70.675458][ T6598] ? blk_queue_enter+0xb60/0xb60 [ 70.680619][ T6598] ? lock_downgrade+0x6e0/0x6e0 [ 70.685506][ T6598] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 70.692042][ T6598] ? __bio_add_page+0x377/0x540 [ 70.696929][ T6598] submit_bio+0x1ea/0x470 [ 70.701289][ T6598] ? submit_bio_noacct+0xf20/0xf20 [ 70.706527][ T6598] submit_bh_wbc+0x5eb/0x7f0 [ 70.711334][ T6598] __block_write_full_page+0x877/0x1360 [ 70.716964][ T6598] ? bdev_evict_inode+0x4a0/0x4a0 [ 70.722117][ T6598] block_write_full_page+0x14d/0x190 [ 70.727586][ T6598] ? bdev_evict_inode+0x4a0/0x4a0 [ 70.732627][ T6598] __writepage+0x60/0x180 [ 70.737290][ T6598] write_cache_pages+0x763/0x11a0 [ 70.742522][ T6598] ? folio_mark_dirty+0x1c0/0x1c0 [ 70.747556][ T6598] ? __folio_cancel_dirty+0x690/0x690 [ 70.753262][ T6598] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 70.759349][ T6598] ? unwind_next_frame+0xec8/0x1ce0 [ 70.764768][ T6598] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 70.770980][ T6598] ? find_held_lock+0x2d/0x110 [ 70.775845][ T6598] ? blkdev_readahead+0x20/0x20 [ 70.780858][ T6598] generic_writepages+0xe2/0x150 [ 70.785891][ T6598] ? write_cache_pages+0x11a0/0x11a0 [ 70.791203][ T6598] ? lock_downgrade+0x6e0/0x6e0 [ 70.796295][ T6598] do_writepages+0x1ab/0x770 [ 70.800978][ T6598] ? writeback_set_ratelimit+0x150/0x150 [ 70.806693][ T6598] ? wbc_attach_and_unlock_inode+0x111/0x9d0 [ 70.812838][ T6598] ? lock_downgrade+0x6e0/0x6e0 [ 70.817695][ T6598] ? lock_release+0x720/0x720 [ 70.822395][ T6598] ? do_raw_spin_lock+0x120/0x2b0 [ 70.827463][ T6598] ? do_raw_spin_unlock+0x171/0x230 [ 70.832842][ T6598] ? _raw_spin_unlock+0x24/0x40 [ 70.837976][ T6598] ? wbc_attach_and_unlock_inode+0x111/0x9d0 [ 70.844340][ T6598] filemap_fdatawrite_wbc+0x1d2/0x2b0 [ 70.850193][ T6598] filemap_write_and_wait_range+0xe1/0x1a0 [ 70.856104][ T6598] ? xas_reload+0x440/0x440 [ 70.860631][ T6598] ? _raw_spin_unlock+0x24/0x40 [ 70.865569][ T6598] ? locks_remove_file+0x2f9/0x570 [ 70.870712][ T6598] blkdev_put+0x753/0x9e0 [ 70.875448][ T6598] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 70.882051][ T6598] blkdev_close+0x8c/0xb0 [ 70.886544][ T6598] __fput+0x288/0x920 [ 70.890534][ T6598] ? blkdev_put+0x9e0/0x9e0 [ 70.895045][ T6598] task_work_run+0xdd/0x1a0 [ 70.900015][ T6598] do_exit+0xbd4/0x2a60 [ 70.904483][ T6598] ? __context_tracking_exit+0xb8/0xe0 [ 70.910877][ T6598] ? lock_downgrade+0x6e0/0x6e0 [ 70.915732][ T6598] ? lock_downgrade+0x6e0/0x6e0 [ 70.920769][ T6598] ? mm_update_next_owner+0x7a0/0x7a0 [ 70.926259][ T6598] do_group_exit+0x125/0x310 [ 70.930866][ T6598] __x64_sys_exit_group+0x3a/0x50 [ 70.936196][ T6598] do_syscall_64+0x35/0xb0 [ 70.940612][ T6598] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 70.946996][ T6598] RIP: 0033:0x43da59 [ 70.950974][ T6598] Code: Unable to access opcode bytes at RIP 0x43da2f. [ 70.958104][ T6598] RSP: 002b:00007ffc4966f348 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 70.966514][ T6598] RAX: ffffffffffffffda RBX: 00000000004ae230 RCX: 000000000043da59 [ 70.974563][ T6598] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 70.982612][ T6598] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000000 [ 70.990700][ T6598] R10: 0000000000000003 R11: 0000000000000246 R12: 00000000004ae230 [ 70.998833][ T6598] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 71.008740][ T6598] Kernel Offset: disabled [ 71.013179][ T6598] Rebooting in 86400 seconds..