[ 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 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... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.206' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.228783] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 33.245977] WARNING: CPU: 1 PID: 8092 at include/linux/backing-dev.h:340 account_page_dirtied+0x8cc/0xbb0 [ 33.255841] Kernel panic - not syncing: panic_on_warn set ... [ 33.255841] [ 33.263206] CPU: 1 PID: 8092 Comm: segctord Not tainted 4.19.211-syzkaller #0 [ 33.270572] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 33.279916] Call Trace: [ 33.282485] dump_stack+0x1fc/0x2ef [ 33.286095] panic+0x26a/0x50e [ 33.289271] ? __warn_printk+0xf3/0xf3 [ 33.293141] ? account_page_dirtied+0x8cc/0xbb0 [ 33.297791] ? __probe_kernel_read+0x130/0x1b0 [ 33.302353] ? __warn.cold+0x5/0x5a [ 33.305961] ? __warn+0xe4/0x200 [ 33.309310] ? account_page_dirtied+0x8cc/0xbb0 [ 33.313965] __warn.cold+0x20/0x5a [ 33.317506] ? account_page_dirtied+0x8cc/0xbb0 [ 33.322154] report_bug+0x262/0x2b0 [ 33.325764] do_error_trap+0x1d7/0x310 [ 33.329692] ? math_error+0x310/0x310 [ 33.333475] ? nilfs_segctor_construct+0x764/0xae0 [ 33.338382] ? nilfs_segctor_thread+0x3cb/0xf50 [ 33.343036] ? mark_held_locks+0xf0/0xf0 [ 33.347077] ? error_entry+0x72/0xd0 [ 33.350770] ? trace_hardirqs_off_caller+0x2c/0x210 [ 33.355765] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.360591] invalid_op+0x14/0x20 [ 33.364025] RIP: 0010:account_page_dirtied+0x8cc/0xbb0 [ 33.369280] Code: 88 01 00 00 be ff ff ff ff 48 8d 78 70 e8 ec e1 ca ff 31 ff 89 c3 89 c6 e8 f1 b3 e2 ff 85 db 0f 85 39 f9 ff ff e8 74 b2 e2 ff <0f> 0b e9 2d f9 ff ff e8 68 b2 e2 ff 4c 89 e6 4c 89 ef e8 9d b3 2d [ 33.388161] RSP: 0018:ffff888095707868 EFLAGS: 00010093 [ 33.393501] RAX: ffff8880b1646340 RBX: 0000000000000000 RCX: ffffffff817fd2ef [ 33.400748] RDX: 0000000000000000 RSI: ffffffff817fd2fc RDI: 0000000000000005 [ 33.408084] RBP: ffff88808dbceb48 R08: 0000000000000000 R09: 0000000000000000 [ 33.415332] R10: 0000000000000005 R11: 0000000000000000 R12: ffffea0002911fc0 [ 33.422668] R13: ffff88808dbce9c0 R14: ffff88808dbce838 R15: ffffea0002911fc8 [ 33.429927] ? account_page_dirtied+0x8bf/0xbb0 [ 33.434588] ? account_page_dirtied+0x8cc/0xbb0 [ 33.439335] ? account_page_dirtied+0x8cc/0xbb0 [ 33.443984] __set_page_dirty+0x7f/0x3e0 [ 33.448045] ? lock_page_memcg+0xa7/0x220 [ 33.452198] mark_buffer_dirty+0x424/0x5c0 [ 33.456551] nilfs_btree_propagate+0x728/0xd80 [ 33.461117] nilfs_bmap_propagate+0x73/0x170 [ 33.465513] nilfs_collect_dat_data+0x45/0xd0 [ 33.469988] nilfs_segctor_apply_buffers+0x14a/0x490 [ 33.475077] ? nilfs_collect_file_bmap+0x70/0x70 [ 33.479814] nilfs_segctor_scan_file+0x475/0x6f0 [ 33.484551] ? nilfs_collect_file_data+0xd0/0xd0 [ 33.489287] ? check_preemption_disabled+0x41/0x280 [ 33.494286] nilfs_segctor_do_construct+0x1562/0x8360 [ 33.499468] ? nilfs_segctor_scan_file+0x6f0/0x6f0 [ 33.504377] ? lock_downgrade+0x720/0x720 [ 33.508504] ? lock_acquire+0x170/0x3c0 [ 33.512471] ? nilfs_segctor_confirm+0xe1/0x180 [ 33.517121] ? do_raw_spin_unlock+0x171/0x230 [ 33.521597] ? _raw_spin_unlock+0x29/0x40 [ 33.525727] nilfs_segctor_construct+0x764/0xae0 [ 33.530465] nilfs_segctor_thread+0x3cb/0xf50 [ 33.534959] ? nilfs_segctor_construct+0xae0/0xae0 [ 33.539882] ? __kthread_parkme+0x5d/0x1e0 [ 33.544102] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 33.549199] ? __kthread_parkme+0x4c/0x1e0 [ 33.553411] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.557970] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 33.563054] ? __kthread_parkme+0x133/0x1e0 [ 33.567365] ? nilfs_segctor_construct+0xae0/0xae0 [ 33.572271] kthread+0x33f/0x460 [ 33.575639] ? kthread_park+0x180/0x180 [ 33.579682] ret_from_fork+0x24/0x30 [ 33.583602] Kernel Offset: disabled [ 33.587277] Rebooting in 86400 seconds..