------------[ cut here ]------------
WARNING: CPU: 1 PID: 7666 at fs/buffer.c:1193 mark_buffer_dirty+0x376/0x3e0 fs/buffer.c:1193
Modules linked in:
CPU: 1 PID: 7666 Comm: syz-executor.0 Not tainted 6.5.0-rc4-syzkaller-00041-gec351c8f2e62 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:mark_buffer_dirty+0x376/0x3e0 fs/buffer.c:1193
Code: e9 2f ec 8c ff e8 2a ec 8c ff 48 89 ef e8 a2 ea e7 ff 5b 5d e9 1b ec 8c ff e8 16 ec 8c ff 0f 0b e9 10 fe ff ff e8 0a ec 8c ff <0f> 0b e9 b7 fc ff ff e8 fe eb 8c ff 0f 0b e9 d6 fc ff ff 48 89 df
RSP: 0018:ffffc9000461ef20 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880341d11d0 RCX: 0000000000000000
RDX: ffff888066780400 RSI: ffffffff81f83436 RDI: 0000000000000001
RBP: ffff88803423e900 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000094011 R12: 0000000000000015
R13: ffff88801d020000 R14: dffffc0000000000 R15: ffffed1003a0402c
FS:  00007faa411076c0(0000) GS:ffff88806b700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faa4059c070 CR3: 000000011b34b000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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:1972 [inline]
 elf_core_dump+0x2845/0x38e0 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_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7faa4047caf1
Code: c4 28 c3 e8 e1 20 00 00 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 73 01 <c3> 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:00000000200000b0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007faa4059c120 RCX: 00007faa4047cae9
RDX: 0000000020000140 RSI: 00000000200000b0 RDI: 0000000000a00000
RBP: 00007faa404c847a R08: 00000000200001c0 R09: 00000000200001c0
R10: 0000000020000180 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007faa4059c120 R15: 00007ffd95076828
 </TASK>