------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2803!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 35 Comm: kworker/u8:2 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Workqueue: writeback wb_workfn (flush-7:1)
RIP: 0010:ext4_do_writepages+0x46d6/0x46e0 fs/ext4/inode.c:2802
Code: c6 20 f3 e3 8b e8 8a d9 a2 fe 90 0f 0b e8 92 5d 40 ff 4c 89 f7 48 c7 c6 00 f8 e3 8b e8 73 d9 a2 fe 90 0f 0b e8 7b 5d 40 ff 90 <0f> 0b 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000ab6d80 EFLAGS: 00010293
RAX: ffffffff82853f15 RBX: 0000004210000000 RCX: ffff888020eabc80
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90000ab7190 R08: ffff88805a8e89f7 R09: 1ffff1100b51d13e
R10: dffffc0000000000 R11: ffffed100b51d13f R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100b0e54c7
FS:  0000000000000000(0000) GS:ffff888125572000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f49761e8600 CR3: 000000007912c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3019
 do_writepages+0x32e/0x550 mm/page-writeback.c:2554
 __writeback_single_inode+0x133/0x11a0 fs/fs-writeback.c:1750
 writeback_sb_inodes+0x944/0x19a0 fs/fs-writeback.c:2041
 wb_writeback+0x456/0xb70 fs/fs-writeback.c:2227
 wb_do_writeback fs/fs-writeback.c:2374 [inline]
 wb_workfn+0x414/0xf50 fs/fs-writeback.c:2414
 process_one_work+0x949/0x1650 kernel/workqueue.c:3279
 process_scheduled_works kernel/workqueue.c:3362 [inline]
 worker_thread+0xb46/0x1140 kernel/workqueue.c:3443
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51e/0xb90 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+0x46d6/0x46e0 fs/ext4/inode.c:2802
Code: c6 20 f3 e3 8b e8 8a d9 a2 fe 90 0f 0b e8 92 5d 40 ff 4c 89 f7 48 c7 c6 00 f8 e3 8b e8 73 d9 a2 fe 90 0f 0b e8 7b 5d 40 ff 90 <0f> 0b 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000ab6d80 EFLAGS: 00010293
RAX: ffffffff82853f15 RBX: 0000004210000000 RCX: ffff888020eabc80
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90000ab7190 R08: ffff88805a8e89f7 R09: 1ffff1100b51d13e
R10: dffffc0000000000 R11: ffffed100b51d13f R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100b0e54c7
FS:  0000000000000000(0000) GS:ffff888125572000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f901a1a7286 CR3: 000000000e54c000 CR4: 00000000003526f0