------------[ cut here ]------------
WARNING: CPU: 0 PID: 16935 at fs/buffer.c:1188 mark_buffer_dirty+0x376/0x3e0 fs/buffer.c:1188
Modules linked in:
CPU: 0 PID: 16935 Comm: syz-executor.1 Not tainted 6.5.0-syzkaller-11329-g708283abf896 #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:1188
Code: e9 0f d0 89 ff e8 0a d0 89 ff 48 89 ef e8 92 76 e7 ff 5b 5d e9 fb cf 89 ff e8 f6 cf 89 ff 0f 0b e9 10 fe ff ff e8 ea cf 89 ff <0f> 0b e9 b7 fc ff ff e8 de cf 89 ff 0f 0b e9 d6 fc ff ff 48 89 df
RSP: 0018:ffffc9000c996fb8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880878a1d98 RCX: 0000000000000000
RDX: ffff88801fb81dc0 RSI: ffffffff81fdcca6 RDI: 0000000000000001
RBP: ffff8880878a1b00 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000012
R13: ffff888083ce4000 R14: dffffc0000000000 R15: ffffed101079c82c
FS:  00007f8ad96926c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c02f19b000 CR3: 000000007be20000 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:2107
 __block_write_begin fs/buffer.c:2157 [inline]
 block_write_begin+0xb1/0x490 fs/buffer.c:2216
 bfs_write_begin+0x31/0xd0 fs/bfs/file.c:177
 generic_perform_write+0x278/0x600 mm/filemap.c:3945
 __generic_file_write_iter+0x1f9/0x240 mm/filemap.c:4040
 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4066
 __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
 elf_core_dump+0x21d7/0x38e0 fs/binfmt_elf.c:2121
 do_coredump+0x2c96/0x3fc0 fs/coredump.c:764
 get_signal+0x244b/0x27b0 kernel/signal.c:2878
 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
 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:309
 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7f8ad887caf1
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:0000000020000360 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f8ad899c050 RCX: 00007f8ad887cae9
RDX: 0000000020000380 RSI: 0000000020000360 RDI: 0000000001001400
RBP: 00007f8ad88c847a R08: 0000000020000400 R09: 0000000020000400
R10: 00000000200003c0 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f8ad899c050 R15: 00007ffe102fa908
 </TASK>