------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2761!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7125 Comm: syz.7.1747 Not tainted 6.1.141-syzkaller-00038-ge2deb0b42a3a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ext4_writepages+0x2ff8/0x3020 fs/ext4/inode.c:2760
Code: b7 86 ff 84 db 75 31 e8 56 b4 86 ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 18 4c 8b 6c 24 38 e9 a2 f7 ff ff e8 38 b4 86 ff <0f> 0b e8 31 b4 86 ff e8 68 37 17 ff eb 93 e8 25 b4 86 ff e8 5c 37
RSP: 0018:ffffc90001e971e0 EFLAGS: 00010293
RAX: ffffffff81e94338 RBX: 0000009410000000 RCX: ffff888110978000
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc90001e97550 R08: dffffc0000000000 R09: ffffed102722df0e
R10: ffffed102722df0e R11: 1ffff1102722df0d R12: dffffc0000000000
R13: ffff88813916f980 R14: 0000008000000000 R15: ffff88813916f868
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeecdb3b48 CR3: 0000000110645000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x3a9/0x5e0 mm/page-writeback.c:2494
 filemap_fdatawrite_wbc+0x128/0x190 mm/filemap.c:408
 __filemap_fdatawrite_range mm/filemap.c:441 [inline]
 __filemap_fdatawrite mm/filemap.c:447 [inline]
 filemap_flush+0xc1/0x110 mm/filemap.c:474
 ext4_alloc_da_blocks+0x7a/0x190 fs/ext4/inode.c:3165
 ext4_release_file+0x84/0x320 fs/ext4/file.c:158
 __fput+0x1fc/0x8f0 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x1db/0x240 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa1d/0x2650 kernel/exit.c:877
 do_group_exit+0x210/0x2d0 kernel/exit.c:1027
 get_signal+0x13b5/0x1520 kernel/signal.c:2889
 arch_do_signal_or_restart+0xb0/0x1030 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x7a/0xb0 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303
 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:288
RIP: 0033:0x7f9775fc3189
Code: Unable to access opcode bytes at 0x7f9775fc315f.
RSP: 002b:00007f9775dbd1c0 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: 0000000000000000 RBX: 00007f9775f45590 RCX: 00007f9775fc3189
RDX: 00007f9775f45590 RSI: 0000000000000058 RDI: 00007ffe6ddc65e0
RBP: 00007f9775dbd6c0 R08: 00007f9775dbd6c0 R09: 00007ffe6ddc66c7
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000006e R14: 00007ffe6ddc65e0 R15: 00007ffe6ddc66c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_writepages+0x2ff8/0x3020 fs/ext4/inode.c:2760
Code: b7 86 ff 84 db 75 31 e8 56 b4 86 ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 18 4c 8b 6c 24 38 e9 a2 f7 ff ff e8 38 b4 86 ff <0f> 0b e8 31 b4 86 ff e8 68 37 17 ff eb 93 e8 25 b4 86 ff e8 5c 37
RSP: 0018:ffffc90001e971e0 EFLAGS: 00010293
RAX: ffffffff81e94338 RBX: 0000009410000000 RCX: ffff888110978000
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc90001e97550 R08: dffffc0000000000 R09: ffffed102722df0e
R10: ffffed102722df0e R11: 1ffff1102722df0d R12: dffffc0000000000
R13: ffff88813916f980 R14: 0000008000000000 R15: ffff88813916f868
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeecdb3b48 CR3: 0000000006e0f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400