Warning: Permanently added '10.128.1.43' (ECDSA) to the list of known hosts. syzkaller login: [ 42.294102] IPVS: ftp: loaded support on port[0] = 21 executing program [ 42.371342] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 42.393234] ------------[ cut here ]------------ [ 42.398116] WARNING: CPU: 1 PID: 7985 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 42.407806] Kernel panic - not syncing: panic_on_warn set ... [ 42.407806] [ 42.415177] CPU: 1 PID: 7985 Comm: segctord Not tainted 4.14.295-syzkaller #0 [ 42.422427] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 42.431759] Call Trace: [ 42.434332] dump_stack+0x1b2/0x281 [ 42.437943] panic+0x1f9/0x42d [ 42.441116] ? add_taint.cold+0x16/0x16 [ 42.445076] ? account_page_dirtied+0x8df/0xbb0 [ 42.449726] ? account_page_dirtied+0x8df/0xbb0 [ 42.454374] __warn.cold+0x20/0x44 [ 42.457916] ? ist_end_non_atomic+0x10/0x10 [ 42.462228] ? account_page_dirtied+0x8df/0xbb0 [ 42.466894] report_bug+0x208/0x250 [ 42.470509] do_error_trap+0x195/0x2d0 [ 42.474379] ? math_error+0x2d0/0x2d0 [ 42.478164] ? trace_hardirqs_on+0x10/0x10 [ 42.482385] ? trace_hardirqs_on+0x10/0x10 [ 42.486605] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.491436] invalid_op+0x1b/0x40 [ 42.494881] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 42.500134] RSP: 0018:ffff8880966df908 EFLAGS: 00010097 [ 42.505480] RAX: ffff8880b4fd2100 RBX: ffff8880aed02380 RCX: 1ffffffff127a5d4 [ 42.512727] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 42.519990] RBP: ffff88808db44b58 R08: ffffffff8ba5ddec R09: 0000000000001d08 [ 42.527235] R10: 0000000000000001 R11: ffff8880b4fd2100 R12: ffffea0002acf3c0 [ 42.534482] R13: ffff88808db449c8 R14: ffff88808db449c8 R15: ffffea0002acf3e0 [ 42.541739] ? account_page_dirtied+0x8df/0xbb0 [ 42.546384] __set_page_dirty+0x77/0x2a0 [ 42.550430] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 42.555858] mark_buffer_dirty+0x307/0x480 [ 42.560072] nilfs_btree_propagate+0x3a3/0xc20 [ 42.564636] nilfs_bmap_propagate+0x73/0x160 [ 42.569025] nilfs_collect_dat_data+0x41/0xb0 [ 42.573499] nilfs_segctor_apply_buffers+0x191/0x450 [ 42.578581] ? nilfs_collect_file_bmap+0x70/0x70 [ 42.583314] nilfs_segctor_scan_file+0x3dd/0x630 [ 42.588048] ? nilfs_collect_file_data+0xb0/0xb0 [ 42.592783] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 42.598211] nilfs_segctor_do_construct+0x1420/0x78d0 [ 42.603395] ? nilfs_segctor_scan_file+0x630/0x630 [ 42.608300] ? lock_acquire+0x170/0x3f0 [ 42.612257] ? lock_downgrade+0x740/0x740 [ 42.616387] ? do_raw_spin_unlock+0x164/0x220 [ 42.620969] ? _raw_spin_unlock+0x29/0x40 [ 42.625095] nilfs_segctor_construct+0x6db/0x8e0 [ 42.629835] nilfs_segctor_thread+0x3ad/0xdb0 [ 42.634314] ? nilfs_segctor_construct+0x8e0/0x8e0 [ 42.639226] ? __schedule+0x893/0x1de0 [ 42.643130] ? kthread+0x287/0x420 [ 42.646653] ? wait_woken+0x230/0x230 [ 42.650433] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 42.655532] ? nilfs_segctor_construct+0x8e0/0x8e0 [ 42.660449] kthread+0x30d/0x420 [ 42.663838] ? kthread_create_on_node+0xd0/0xd0 [ 42.668602] ret_from_fork+0x24/0x30 [ 42.672542] Kernel Offset: disabled [ 42.676210] Rebooting in 86400 seconds..