[ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Warning: Permanently added '10.128.0.110' (ECDSA) to the list of known hosts. executing program [ 78.926026][ T37] audit: type=1400 audit(1617727882.205:8): avc: denied { execmem } for pid=8387 comm="syz-executor144" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 78.958523][ T8388] loop0: detected capacity change from 0 to 8177 [ 78.974654][ T8388] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024) [ 79.015631][ T8391] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds executing program executing program executing program executing program executing program executing program executing program executing program Debian GNU/Linux 9 syzkaller ttyS0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 84.069288][ T8391] ------------[ cut here ]------------ [ 84.075163][ T8391] WARNING: CPU: 1 PID: 8391 at include/linux/backing-dev.h:283 account_page_dirtied+0x767/0xa00 [ 84.085724][ T8391] Modules linked in: [ 84.089638][ T8391] CPU: 1 PID: 8391 Comm: segctord Not tainted 5.12.0-rc6-syzkaller #0 [ 84.097816][ T8391] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.107880][ T8391] RIP: 0010:account_page_dirtied+0x767/0xa00 [ 84.113891][ T8391] Code: a8 01 00 00 be ff ff ff ff 48 8d 78 70 e8 81 cb 69 07 31 ff 89 c3 89 c6 e8 56 22 da ff 85 db 0f 85 bc fa ff ff e8 f9 1b da ff <0f> 0b e9 b0 fa ff ff e8 ed 1b da ff 48 89 ee 4c 89 ef e8 12 d9 34 [ 84.133498][ T8391] RSP: 0018:ffffc9000176f880 EFLAGS: 00010093 [ 84.139566][ T8391] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 84.147537][ T8391] RDX: ffff888026f38240 RSI: ffffffff819909c7 RDI: 0000000000000003 [ 84.155519][ T8391] RBP: ffffea00009e5f00 R08: 0000000000000000 R09: 0000000000000001 [ 84.163491][ T8391] R10: ffffffff819909ba R11: 0000000000000000 R12: ffff8880383c5c38 [ 84.171462][ T8391] R13: ffff8880383c5a90 R14: ffff8880383c58e0 R15: ffffea00009e5f08 [ 84.179434][ T8391] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 84.188366][ T8391] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 84.194951][ T8391] CR2: 0000561e29924600 CR3: 000000001c5ae000 CR4: 00000000001506e0 [ 84.202922][ T8391] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 84.210896][ T8391] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 84.218867][ T8391] Call Trace: [ 84.222145][ T8391] __set_page_dirty+0x7f/0x400 [ 84.226943][ T8391] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 84.233203][ T8391] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 84.239445][ T8391] mark_buffer_dirty+0x448/0x5d0 [ 84.244387][ T8391] nilfs_btree_propagate+0x4ae/0xea0 [ 84.249688][ T8391] nilfs_bmap_propagate+0x73/0x170 [ 84.254804][ T8391] nilfs_collect_dat_data+0x45/0xd0 [ 84.260010][ T8391] nilfs_segctor_apply_buffers+0x14a/0x470 [ 84.265841][ T8391] ? nilfs_collect_file_bmap+0x80/0x80 [ 84.279814][ T8391] nilfs_segctor_scan_file+0x3e4/0x700 [ 84.285283][ T8391] ? nilfs_collect_file_data+0xd0/0xd0 [ 84.290748][ T8391] nilfs_segctor_do_construct+0x16ee/0x6b20 [ 84.296670][ T8391] ? nilfs_segctor_scan_file+0x700/0x700 [ 84.302306][ T8391] ? do_raw_spin_lock+0x120/0x2b0 [ 84.307350][ T8391] ? rwlock_bug.part.0+0x90/0x90 [ 84.312287][ T8391] ? do_raw_spin_unlock+0x171/0x230 [ 84.317486][ T8391] ? _raw_spin_unlock+0x24/0x40 [ 84.322353][ T8391] nilfs_segctor_construct+0x7a7/0xb30 [ 84.327823][ T8391] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 84.334072][ T8391] ? trace_nilfs2_transaction_transition+0x1c8/0x250 [ 84.340844][ T8391] nilfs_segctor_thread+0x3c3/0xf90 [ 84.346047][ T8391] ? nilfs_segctor_construct+0xb30/0xb30 [ 84.351687][ T8391] ? finish_wait+0x260/0x260 [ 84.356276][ T8391] ? lockdep_hardirqs_on+0x79/0x100 [ 84.361476][ T8391] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 84.367724][ T8391] ? __kthread_parkme+0x13f/0x1e0 [ 84.372760][ T8391] ? nilfs_segctor_construct+0xb30/0xb30 [ 84.378407][ T8391] kthread+0x3b1/0x4a0 [ 84.382490][ T8391] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 84.388388][ T8391] ret_from_fork+0x1f/0x30 [ 84.392814][ T8391] Kernel panic - not syncing: panic_on_warn set ... [ 84.399390][ T8391] CPU: 1 PID: 8391 Comm: segctord Not tainted 5.12.0-rc6-syzkaller #0 [ 84.407538][ T8391] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.417606][ T8391] Call Trace: [ 84.420889][ T8391] dump_stack+0x141/0x1d7 [ 84.425240][ T8391] panic+0x306/0x73d [ 84.429140][ T8391] ? __warn_printk+0xf3/0xf3 [ 84.433728][ T8391] ? __warn.cold+0x1a/0x44 [ 84.438146][ T8391] ? account_page_dirtied+0x767/0xa00 [ 84.443531][ T8391] __warn.cold+0x35/0x44 [ 84.447775][ T8391] ? account_page_dirtied+0x767/0xa00 [ 84.453161][ T8391] report_bug+0x1bd/0x210 [ 84.457505][ T8391] handle_bug+0x3c/0x60 [ 84.461658][ T8391] exc_invalid_op+0x14/0x40 [ 84.466169][ T8391] asm_exc_invalid_op+0x12/0x20 [ 84.471023][ T8391] RIP: 0010:account_page_dirtied+0x767/0xa00 [ 84.477023][ T8391] Code: a8 01 00 00 be ff ff ff ff 48 8d 78 70 e8 81 cb 69 07 31 ff 89 c3 89 c6 e8 56 22 da ff 85 db 0f 85 bc fa ff ff e8 f9 1b da ff <0f> 0b e9 b0 fa ff ff e8 ed 1b da ff 48 89 ee 4c 89 ef e8 12 d9 34 [ 84.496717][ T8391] RSP: 0018:ffffc9000176f880 EFLAGS: 00010093 [ 84.502789][ T8391] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 84.510755][ T8391] RDX: ffff888026f38240 RSI: ffffffff819909c7 RDI: 0000000000000003 [ 84.518745][ T8391] RBP: ffffea00009e5f00 R08: 0000000000000000 R09: 0000000000000001 [ 84.526715][ T8391] R10: ffffffff819909ba R11: 0000000000000000 R12: ffff8880383c5c38 [ 84.534694][ T8391] R13: ffff8880383c5a90 R14: ffff8880383c58e0 R15: ffffea00009e5f08 [ 84.542669][ T8391] ? account_page_dirtied+0x75a/0xa00 [ 84.548044][ T8391] ? account_page_dirtied+0x767/0xa00 [ 84.553415][ T8391] __set_page_dirty+0x7f/0x400 [ 84.558174][ T8391] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 84.564417][ T8391] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 84.570673][ T8391] mark_buffer_dirty+0x448/0x5d0 [ 84.575610][ T8391] nilfs_btree_propagate+0x4ae/0xea0 [ 84.580896][ T8391] nilfs_bmap_propagate+0x73/0x170 [ 84.586013][ T8391] nilfs_collect_dat_data+0x45/0xd0 [ 84.591218][ T8391] nilfs_segctor_apply_buffers+0x14a/0x470 [ 84.597049][ T8391] ? nilfs_collect_file_bmap+0x80/0x80 [ 84.602513][ T8391] nilfs_segctor_scan_file+0x3e4/0x700 [ 84.608092][ T8391] ? nilfs_collect_file_data+0xd0/0xd0 [ 84.613566][ T8391] nilfs_segctor_do_construct+0x16ee/0x6b20 [ 84.619499][ T8391] ? nilfs_segctor_scan_file+0x700/0x700 [ 84.625216][ T8391] ? do_raw_spin_lock+0x120/0x2b0 [ 84.630249][ T8391] ? rwlock_bug.part.0+0x90/0x90 [ 84.635200][ T8391] ? do_raw_spin_unlock+0x171/0x230 [ 84.640411][ T8391] ? _raw_spin_unlock+0x24/0x40 [ 84.645263][ T8391] nilfs_segctor_construct+0x7a7/0xb30 [ 84.650723][ T8391] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 84.656969][ T8391] ? trace_nilfs2_transaction_transition+0x1c8/0x250 [ 84.663645][ T8391] nilfs_segctor_thread+0x3c3/0xf90 [ 84.668842][ T8391] ? nilfs_segctor_construct+0xb30/0xb30 [ 84.674650][ T8391] ? finish_wait+0x260/0x260 [ 84.679260][ T8391] ? lockdep_hardirqs_on+0x79/0x100 [ 84.684465][ T8391] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 84.690719][ T8391] ? __kthread_parkme+0x13f/0x1e0 [ 84.695749][ T8391] ? nilfs_segctor_construct+0xb30/0xb30 [ 84.701388][ T8391] kthread+0x3b1/0x4a0 [ 84.705459][ T8391] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 84.711353][ T8391] ret_from_fork+0x1f/0x30 [ 84.716844][ T8391] Kernel Offset: disabled [ 84.721381][ T8391] Rebooting in 86400 seconds..