------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2809!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 1475 Comm: kworker/u8:11 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:ext4_do_writepages+0x45f0/0x4600 fs/ext4/inode.c:2808
Code: c6 e0 31 fe 8a e8 50 f0 ba fe 90 0f 0b e8 e8 04 52 ff 4c 89 f7 48 c7 c6 c0 35 fe 8a e8 39 f0 ba fe 90 0f 0b e8 d1 04 52 ff 90 <0f> 0b 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90
RSP: 0018:ffffc90005776c20 EFLAGS: 00010293
RAX: ffffffff826ca87f RBX: 0000004210000000 RCX: ffff888027453c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90005777050 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10094095f7 R12: 0000000000000001
R13: ffffc900057770a0 R14: 0000004000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888126df7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3d73addf18 CR3: 0000000027706000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_writepages+0x205/0x350 fs/ext4/inode.c:3025
 do_writepages+0x32e/0x550 mm/page-writeback.c:2604
 __writeback_single_inode+0x145/0x1000 fs/fs-writeback.c:1719
 writeback_sb_inodes+0x6b7/0xf60 fs/fs-writeback.c:2015
 __writeback_inodes_wb+0x111/0x240 fs/fs-writeback.c:2086
 wb_writeback+0x44f/0xaf0 fs/fs-writeback.c:2197
 wb_check_old_data_flush fs/fs-writeback.c:2301 [inline]
 wb_do_writeback fs/fs-writeback.c:2354 [inline]
 wb_workfn+0xaf4/0xf00 fs/fs-writeback.c:2382
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x45f0/0x4600 fs/ext4/inode.c:2808
Code: c6 e0 31 fe 8a e8 50 f0 ba fe 90 0f 0b e8 e8 04 52 ff 4c 89 f7 48 c7 c6 c0 35 fe 8a e8 39 f0 ba fe 90 0f 0b e8 d1 04 52 ff 90 <0f> 0b 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90
RSP: 0018:ffffc90005776c20 EFLAGS: 00010293
RAX: ffffffff826ca87f RBX: 0000004210000000 RCX: ffff888027453c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90005777050 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10094095f7 R12: 0000000000000001
R13: ffffc900057770a0 R14: 0000004000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888126df7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3d73addf18 CR3: 0000000027706000 CR4: 00000000003526f0