NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 2048)
NILFS (loop0): mounting unchecked fs
NILFS (loop0): recovery complete
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6876 at include/linux/backing-dev.h:338 inode_to_wb include/linux/backing-dev.h:335 [inline]
WARNING: CPU: 0 PID: 6876 at include/linux/backing-dev.h:338 account_page_dirtied+0x510/0x5c0 mm/page-writeback.c:2430
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 6876 Comm: syz-executor403 Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d6/0x29e lib/dump_stack.c:118
 panic+0x2c0/0x800 kernel/panic.c:231
 __warn+0x227/0x250 kernel/panic.c:600
 report_bug+0x1b1/0x2e0 lib/bug.c:198
 handle_bug+0x42/0x80 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:inode_to_wb include/linux/backing-dev.h:335 [inline]
RIP: 0010:account_page_dirtied+0x510/0x5c0 mm/page-writeback.c:2430
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
RSP: 0018:ffffc900053b75a8 EFLAGS: 00010093
RAX: ffffffff8199eed0 RBX: ffff88808501bc38 RCX: ffff888093a702c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8199ee6c R09: ffffed1010a03788
R10: ffffed1010a03788 R11: 0000000000000000 R12: 1ffff11010a03787
R13: dffffc0000000000 R14: ffff88808501bac0 R15: ffffea00027d7780
 __set_page_dirty+0x122/0x380 fs/buffer.c:608
 mark_buffer_dirty+0x235/0x2e0 fs/buffer.c:1137
 nilfs_btree_commit_convert_and_insert fs/nilfs2/btree.c:1812 [inline]
 nilfs_btree_convert_and_insert+0xb9e/0x1480 fs/nilfs2/btree.c:1877
 nilfs_bmap_do_insert fs/nilfs2/bmap.c:111 [inline]
 nilfs_bmap_insert+0x147/0x2f0 fs/nilfs2/bmap.c:147
 nilfs_mdt_insert_new_block fs/nilfs2/mdt.c:44 [inline]
 nilfs_mdt_create_block+0x243/0x850 fs/nilfs2/mdt.c:93
 nilfs_mdt_get_block+0x6a/0xa0 fs/nilfs2/mdt.c:254
 nilfs_palloc_get_block+0x12f/0x220 fs/nilfs2/alloc.c:216
 nilfs_palloc_get_entry_block+0x174/0x1b0 fs/nilfs2/alloc.c:318
 nilfs_dat_prepare_entry fs/nilfs2/dat.c:43 [inline]
 nilfs_dat_prepare_alloc+0x5c/0x90 fs/nilfs2/dat.c:69
 nilfs_bmap_prepare_alloc_ptr fs/nilfs2/bmap.h:183 [inline]
 nilfs_direct_insert+0x14a/0x490 fs/nilfs2/direct.c:122
 nilfs_bmap_do_insert fs/nilfs2/bmap.c:121 [inline]
 nilfs_bmap_insert+0x1c9/0x2f0 fs/nilfs2/bmap.c:147
 nilfs_get_block+0x379/0x800 fs/nilfs2/inode.c:97
 __block_write_begin_int+0x708/0x1a00 fs/buffer.c:2011
 nilfs_prepare_chunk fs/nilfs2/dir.c:92 [inline]
 nilfs_make_empty+0xe4/0x740 fs/nilfs2/dir.c:591
 nilfs_mkdir+0x15f/0x290 fs/nilfs2/namei.c:227
 vfs_mkdir+0x42a/0x600 fs/namei.c:3649
 do_mkdirat+0x1b9/0x310 fs/namei.c:3672
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x444cd9
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
RSP: 002b:00007fffc93fe978 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444cd9
RDX: 0000000000000010 RSI: 0000000020000a40 RDI: 0000000000000005
RBP: 00000000006d1018 R08: 00007fff00000015 R09: 00000000004002e0
R10: 00007fffc93fe820 R11: 0000000000000246 R12: 00000000004028c0
R13: 0000000000402950 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..