------------[ cut here ]------------
WARNING: CPU: 0 PID: 18409 at fs/buffer.c:1193 mark_buffer_dirty+0x376/0x3e0 fs/buffer.c:1193
Modules linked in:
CPU: 0 PID: 18409 Comm: syz-executor.1 Not tainted 6.5.0-rc5-syzkaller-00056-gcacc6e22932f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:mark_buffer_dirty+0x376/0x3e0 fs/buffer.c:1193
Code: e9 af 0c 8c ff e8 aa 0c 8c ff 48 89 ef e8 12 eb e7 ff 5b 5d e9 9b 0c 8c ff e8 96 0c 8c ff 0f 0b e9 10 fe ff ff e8 8a 0c 8c ff <0f> 0b e9 b7 fc ff ff e8 7e 0c 8c ff 0f 0b e9 d6 fc ff ff 48 89 df
RSP: 0018:ffffc900153cef20 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88803b88ce80 RCX: 0000000000000000
RDX: ffff888039c05940 RSI: ffffffff81f9fc16 RDI: 0000000000000001
RBP: ffff88808006a400 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000009
R13: ffff888038d8e000 R14: dffffc0000000000 R15: ffffed10071b1c2c
FS:  00007f1deafa26c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1deaf81990 CR3: 000000002c4d8000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 bfs_move_block fs/bfs/file.c:43 [inline]
 bfs_move_blocks fs/bfs/file.c:56 [inline]
 bfs_get_block+0x37f/0xdd0 fs/bfs/file.c:125
 __block_write_begin_int+0x3c0/0x1470 fs/buffer.c:2128
 __block_write_begin fs/buffer.c:2178 [inline]
 block_write_begin+0xb1/0x490 fs/buffer.c:2239
 bfs_write_begin+0x31/0xd0 fs/bfs/file.c:177
 generic_perform_write+0x278/0x600 mm/filemap.c:3923
 __generic_file_write_iter+0x1f9/0x240 mm/filemap.c:4018
 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4044
 __kernel_write_iter+0x261/0x7e0 fs/read_write.c:517
 __kernel_write+0xf6/0x140 fs/read_write.c:537
 __dump_emit fs/coredump.c:813 [inline]
 dump_emit+0x21d/0x330 fs/coredump.c:850
 writenote+0x215/0x2b0 fs/binfmt_elf.c:1487
 write_note_info fs/binfmt_elf.c:1977 [inline]
 elf_core_dump+0x25ca/0x38e0 fs/binfmt_elf.c:2129
 do_coredump+0x2c96/0x3fc0 fs/coredump.c:764
 get_signal+0x2464/0x2770 kernel/signal.c:2867
 arch_do_signal_or_restart+0x89/0x5f0 arch/x86/kernel/signal.c:308
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:310
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 002b:0000000020000008 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f1dea39bf80 RCX: 00007f1dea27cae9
RDX: 0000000020000040 RSI: 0000000020000000 RDI: 0000000000040000
RBP: 00007f1dea2c847a R08: 0000000020000200 R09: 0000000020000200
R10: 0000000020000080 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f1dea39bf80 R15: 00007ffe97fe8218
 </TASK>