------------[ cut here ]------------
WARNING: CPU: 1 PID: 5190 at fs/buffer.c:1176 mark_buffer_dirty+0x3cb/0x440 fs/buffer.c:1176
Modules linked in:
CPU: 1 PID: 5190 Comm: syz-executor224 Not tainted 6.9.0-rc5-syzkaller-00159-gc942a0cd3603 #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+0x3cb/0x440 fs/buffer.c:1176
Code: e8 ea 69 82 ff 48 89 ef e8 e2 c1 e5 ff 5b 5d 41 5c e9 d9 69 82 ff e8 d4 69 82 ff 90 0f 0b 90 e9 d1 fd ff ff e8 c6 69 82 ff 90 <0f> 0b 90 e9 63 fc ff ff e8 b8 69 82 ff 90 0f 0b 90 e9 8a fc ff ff
RSP: 0000:ffffc900031befa8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802fea0cb0 RCX: ffffffff820b54ed
RDX: ffff888024f40000 RSI: ffffffff820b588a RDI: 0000000000000001
RBP: ffff88801eb3a000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000009
R13: dffffc0000000000 R14: ffffed1003d6742c R15: ffff88802fea0cb0
FS:  000055558fc69380(0000) GS:ffff88806b300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002549e000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bfs_move_block fs/bfs/file.c:44 [inline]
 bfs_move_blocks fs/bfs/file.c:57 [inline]
 bfs_get_block+0x3ea/0xee0 fs/bfs/file.c:126
 __block_write_begin_int+0x4fb/0x16e0 fs/buffer.c:2105
 __block_write_begin fs/buffer.c:2154 [inline]
 block_write_begin+0xb1/0x4a0 fs/buffer.c:2213
 bfs_write_begin+0x31/0xd0 fs/bfs/file.c:179
 generic_perform_write+0x272/0x620 mm/filemap.c:3974
 __generic_file_write_iter+0x1fd/0x240 mm/filemap.c:4069
 generic_file_write_iter+0xe7/0x350 mm/filemap.c:4095
 __kernel_write_iter+0x33c/0xa60 fs/read_write.c:523
 __kernel_write+0xf6/0x140 fs/read_write.c:543
 __dump_emit fs/coredump.c:813 [inline]
 dump_emit+0x221/0x330 fs/coredump.c:850
 elf_core_dump+0x2240/0x38d0 fs/binfmt_elf.c:2056
 do_coredump+0x2c2c/0x3f60 fs/coredump.c:764
 get_signal+0x232c/0x2710 kernel/signal.c:2896
 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 irqentry_exit_to_user_mode+0x139/0x280 kernel/entry/common.c:231
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 002b:0000000020000008 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 0000000000000020 RCX: 00007f89ea370749
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00007ffca57724b0 R08: 0000000000000000 R09: 00007ffca5772510
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f89ea3e35f0
R13: 00007ffca5772698 R14: 0000000000000001 R15: 0000000000000001
 </TASK>