------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2606!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 146 Comm: kworker/u4:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: writeback wb_workfn (flush-7:1)
RIP: 0010:ext4_do_writepages+0x398d/0x3990 fs/ext4/inode.c:2605
Code: c1 03 38 c1 0f 8c 7d fd ff ff 4c 89 e7 e8 9b b5 ab ff e9 70 fd ff ff e8 31 34 53 ff 0f 0b e8 2a 34 53 ff 0f 0b e8 23 34 53 ff <0f> 0b 90 66 0f 1f 00 55 41 57 41 56 41 54 53 48 89 fb 49 bf 00 00
RSP: 0018:ffffc90002dbee80 EFLAGS: 00010293
RAX: ffffffff82344e4d RBX: 0000004210000000 RCX: ffff88801a783c00
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90002dbf1f0 R08: ffff8880777cda57 R09: 1ffff1100eef9b4a
R10: dffffc0000000000 R11: ffffed100eef9b4b R12: 0000000000000001
R13: ffff8880777cdcb0 R14: 0000004000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555569c6da38 CR3: 000000007f019000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 ext4_writepages+0x1dd/0x350 fs/ext4/inode.c:2810
 do_writepages+0x351/0x590 mm/page-writeback.c:2575
 __writeback_single_inode+0x14e/0xee0 fs/fs-writeback.c:1686
 writeback_sb_inodes+0x813/0x1020 fs/fs-writeback.c:1977
 wb_writeback+0x45e/0xbe0 fs/fs-writeback.c:2156
 wb_do_writeback fs/fs-writeback.c:2303 [inline]
 wb_workfn+0x400/0xe60 fs/fs-writeback.c:2343
 process_one_work kernel/workqueue.c:2657 [inline]
 process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x398d/0x3990 fs/ext4/inode.c:2605
Code: c1 03 38 c1 0f 8c 7d fd ff ff 4c 89 e7 e8 9b b5 ab ff e9 70 fd ff ff e8 31 34 53 ff 0f 0b e8 2a 34 53 ff 0f 0b e8 23 34 53 ff <0f> 0b 90 66 0f 1f 00 55 41 57 41 56 41 54 53 48 89 fb 49 bf 00 00
RSP: 0018:ffffc90002dbee80 EFLAGS: 00010293
RAX: ffffffff82344e4d RBX: 0000004210000000 RCX: ffff88801a783c00
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90002dbf1f0 R08: ffff8880777cda57 R09: 1ffff1100eef9b4a
R10: dffffc0000000000 R11: ffffed100eef9b4b R12: 0000000000000001
R13: ffff8880777cdcb0 R14: 0000004000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f67853ef2f8 CR3: 0000000030ba9000 CR4: 00000000003506f0