------------[ cut here ]------------
WARNING: fs/buffer.c:1183 at mark_buffer_dirty+0x26c/0x490 fs/buffer.c:1183, CPU#1: syz.7.307/8487
Modules linked in:
CPU: 1 UID: 0 PID: 8487 Comm: syz.7.307 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : mark_buffer_dirty+0x26c/0x490 fs/buffer.c:1183
lr : mark_buffer_dirty+0x26c/0x490 fs/buffer.c:1183
sp : ffff8000a09073f0
x29: ffff8000a09073f0 x28: ffff0000e189e158 x27: dfff800000000000
x26: ffff00012a931000 x25: ffff0000fbdeca28 x24: ffff0000fbd8a1d0
x23: ffff0000e189e018 x22: ffff0000fbf62bc8 x21: 1fffe0001c313c2b
x20: 0000000000000010 x19: ffff0000fbd8a1d0 x18: 1fffe00033781890
x17: ffff80008f86e000 x16: ffff8000805387e4 x15: 0000000000000001
x14: 1fffe0001f7b143a x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 000000000004a71f x9 : ffff8000b1d08000
x8 : 000000000004a720 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff00012a931200 x4 : ffff000125a44000 x3 : ffff800080eb0438
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 mark_buffer_dirty+0x26c/0x490 fs/buffer.c:1183 (P)
 bfs_move_block fs/bfs/file.c:44 [inline]
 bfs_move_blocks fs/bfs/file.c:57 [inline]
 bfs_get_block+0x4d8/0x9d4 fs/bfs/file.c:126
 __block_write_begin_int+0x53c/0x15e8 fs/buffer.c:2145
 block_write_begin+0xa4/0x12c fs/buffer.c:2256
 bfs_write_begin+0x48/0xec fs/bfs/file.c:180
 generic_perform_write+0x244/0x7bc mm/filemap.c:4314
 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4431
 generic_file_write_iter+0x10c/0x47c mm/filemap.c:4457
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x540/0xa3c fs/read_write.c:686
 ksys_pwrite64 fs/read_write.c:793 [inline]
 __do_sys_pwrite64 fs/read_write.c:801 [inline]
 __se_sys_pwrite64 fs/read_write.c:798 [inline]
 __arm64_sys_pwrite64+0x170/0x208 fs/read_write.c:798
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 10050
hardirqs last  enabled at (10049): [<ffff80008af995cc>] irqentry_exit+0x1b4/0x308 kernel/entry/common.c:219
hardirqs last disabled at (10050): [<ffff80008af93820>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412
softirqs last  enabled at (7054): [<ffff8000803e1080>] softirq_handle_end kernel/softirq.c:468 [inline]
softirqs last  enabled at (7054): [<ffff8000803e1080>] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650
softirqs last disabled at (7015): [<ffff800080020fb4>] __do_softirq+0x14/0x20 kernel/softirq.c:656
---[ end trace 0000000000000000 ]---