------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2763!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 2743 Comm: syz.8.638 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:ext4_writepages+0x30c2/0x30e0 fs/ext4/inode.c:2762
Code: 89 84 ff 84 db 75 31 e8 3c 86 84 ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 10 4c 8b 6c 24 40 e9 08 d3 ff ff e8 1e 86 84 ff <0f> 0b e8 17 86 84 ff e8 7e 87 13 ff eb 93 e8 0b 86 84 ff e8 72 87
RSP: 0018:ffffc9000128f1c0 EFLAGS: 00010293
RAX: ffffffff81ecf562 RBX: 0000009410000000 RCX: ffff888114e25100
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc9000128f530 R08: ffff8881372ce18f R09: 1ffff11026e59c31
R10: dffffc0000000000 R11: ffffed1026e59c32 R12: dffffc0000000000
R13: ffff8881194f0000 R14: 0000008000000000 R15: 1ffff92000251e64
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4ae8bea540 CR3: 0000000115303000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x3a4/0x5f0 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+0xe0/0x140 mm/filemap.c:474
 ext4_alloc_da_blocks+0x7a/0x190 fs/ext4/inode.c:3167
 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+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa35/0x2660 kernel/exit.c:886
 do_group_exit+0x225/0x2e0 kernel/exit.c:1029
 get_signal+0x13b5/0x1520 kernel/signal.c:2891
 arch_do_signal_or_restart+0xd1/0x1140 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x7a/0xb0 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0x87/0xd0 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
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fbe6199ce59
Code: Unable to access opcode bytes at 0x7fbe6199ce2f.
RSP: 002b:00007fbe6293e0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fbe61c15fa8 RCX: 00007fbe6199ce59
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbe61c15fa8
RBP: 00007fbe61c15fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbe61c16038 R14: 00007ffc4213f700 R15: 00007ffc4213f7e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_writepages+0x30c2/0x30e0 fs/ext4/inode.c:2762
Code: 89 84 ff 84 db 75 31 e8 3c 86 84 ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 10 4c 8b 6c 24 40 e9 08 d3 ff ff e8 1e 86 84 ff <0f> 0b e8 17 86 84 ff e8 7e 87 13 ff eb 93 e8 0b 86 84 ff e8 72 87
RSP: 0018:ffffc9000128f1c0 EFLAGS: 00010293
RAX: ffffffff81ecf562 RBX: 0000009410000000 RCX: ffff888114e25100
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc9000128f530 R08: ffff8881372ce18f R09: 1ffff11026e59c31
R10: dffffc0000000000 R11: ffffed1026e59c32 R12: dffffc0000000000
R13: ffff8881194f0000 R14: 0000008000000000 R15: 1ffff92000251e64
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe8cddea540 CR3: 0000000122094000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400