[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.192313][ T6876] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024) [ 47.202727][ T6876] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 2048) [ 47.214145][ T6876] NILFS (loop0): mounting unchecked fs [ 47.226175][ T6876] NILFS (loop0): recovery complete [ 47.233114][ T6878] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 47.239308][ T6876] ------------[ cut here ]------------ [ 47.251675][ T6876] WARNING: CPU: 0 PID: 6876 at include/linux/backing-dev.h:338 account_page_dirtied+0x510/0x5c0 [ 47.262186][ T6876] Kernel panic - not syncing: panic_on_warn set ... [ 47.268781][ T6876] CPU: 0 PID: 6876 Comm: syz-executor403 Not tainted 5.9.0-rc8-syzkaller #0 [ 47.277448][ T6876] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.287510][ T6876] Call Trace: [ 47.290806][ T6876] dump_stack+0x1d6/0x29e [ 47.295146][ T6876] panic+0x2c0/0x800 [ 47.299075][ T6876] ? __warn+0x102/0x250 [ 47.303233][ T6876] ? account_page_dirtied+0x510/0x5c0 [ 47.308612][ T6876] ? account_page_dirtied+0x510/0x5c0 [ 47.313986][ T6876] __warn+0x227/0x250 [ 47.317978][ T6876] ? account_page_dirtied+0x510/0x5c0 [ 47.323399][ T6876] report_bug+0x1b1/0x2e0 [ 47.327756][ T6876] handle_bug+0x42/0x80 [ 47.331906][ T6876] exc_invalid_op+0x16/0x40 [ 47.336418][ T6876] asm_exc_invalid_op+0x12/0x20 [ 47.341270][ T6876] RIP: 0010:account_page_dirtied+0x510/0x5c0 [ 47.347249][ T6876] Code: 89 23 e9 47 fe ff ff e8 3e 0f db ff 4c 89 ff 48 89 ee 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 35 e1 1f 00 e8 20 0f db ff <0f> 0b 43 80 3c 2c 00 0f 85 9d fc ff ff e9 a0 fc ff ff 89 d9 80 e1 [ 47.366876][ T6876] RSP: 0018:ffffc900053b75a8 EFLAGS: 00010093 [ 47.372922][ T6876] RAX: ffffffff8199eed0 RBX: ffff88808501bc38 RCX: ffff888093a702c0 [ 47.380889][ T6876] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 47.388873][ T6876] RBP: 0000000000000000 R08: ffffffff8199ee6c R09: ffffed1010a03788 [ 47.396840][ T6876] R10: ffffed1010a03788 R11: 0000000000000000 R12: 1ffff11010a03787 [ 47.404814][ T6876] R13: dffffc0000000000 R14: ffff88808501bac0 R15: ffffea00027d7780 [ 47.412793][ T6876] ? account_page_dirtied+0x4ac/0x5c0 [ 47.418140][ T6876] ? account_page_dirtied+0x510/0x5c0 [ 47.423508][ T6876] ? account_page_dirtied+0x510/0x5c0 [ 47.428868][ T6876] ? __set_page_dirty+0x110/0x380 [ 47.433873][ T6876] __set_page_dirty+0x122/0x380 [ 47.438700][ T6876] ? page_mapping+0x342/0x460 [ 47.443355][ T6876] mark_buffer_dirty+0x235/0x2e0 [ 47.448284][ T6876] nilfs_btree_convert_and_insert+0xb9e/0x1480 [ 47.455536][ T6876] ? nilfs_direct_gather_data+0x49e/0x4c0 [ 47.461245][ T6876] nilfs_bmap_insert+0x147/0x2f0 [ 47.466162][ T6876] ? lock_is_held_type+0xb3/0xe0 [ 47.471090][ T6876] nilfs_mdt_create_block+0x243/0x850 [ 47.476440][ T6876] ? nilfs_mdt_read_block+0x3d9/0x3e0 [ 47.481794][ T6876] nilfs_mdt_get_block+0x6a/0xa0 [ 47.486755][ T6876] nilfs_palloc_get_block+0x12f/0x220 [ 47.492142][ T6876] nilfs_palloc_get_entry_block+0x174/0x1b0 [ 47.498026][ T6876] nilfs_dat_prepare_alloc+0x5c/0x90 [ 47.503321][ T6876] nilfs_direct_insert+0x14a/0x490 [ 47.508447][ T6876] nilfs_bmap_insert+0x1c9/0x2f0 [ 47.513379][ T6876] ? rcu_read_lock_sched_held+0x2f/0xa0 [ 47.518932][ T6876] ? trace_nilfs2_transaction_transition+0x260/0x2b0 [ 47.525596][ T6876] nilfs_get_block+0x379/0x800 [ 47.530345][ T6876] ? create_page_buffers+0x234/0x2f0 [ 47.535627][ T6876] __block_write_begin_int+0x708/0x1a00 [ 47.541186][ T6876] ? pagecache_get_page+0xacf/0xe50 [ 47.546631][ T6876] ? nilfs_inode_sub_blocks+0xa0/0xa0 [ 47.551995][ T6876] nilfs_make_empty+0xe4/0x740 [ 47.556878][ T6876] nilfs_mkdir+0x15f/0x290 [ 47.561277][ T6876] vfs_mkdir+0x42a/0x600 [ 47.565502][ T6876] do_mkdirat+0x1b9/0x310 [ 47.569822][ T6876] do_syscall_64+0x31/0x70 [ 47.574223][ T6876] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 47.580088][ T6876] RIP: 0033:0x444cd9 [ 47.583968][ T6876] Code: 8d d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 47.603551][ T6876] RSP: 002b:00007fffc93fe978 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 47.611936][ T6876] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444cd9 [ 47.619881][ T6876] RDX: 0000000000000010 RSI: 0000000020000a40 RDI: 0000000000000005 [ 47.627828][ T6876] RBP: 00000000006d1018 R08: 00007fff00000015 R09: 00000000004002e0 [ 47.635777][ T6876] R10: 00007fffc93fe820 R11: 0000000000000246 R12: 00000000004028c0 [ 47.643722][ T6876] R13: 0000000000402950 R14: 0000000000000000 R15: 0000000000000000 [ 47.652994][ T6876] Kernel Offset: disabled [ 47.657384][ T6876] Rebooting in 86400 seconds..