------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2806!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6838 Comm: kworker/u8:13 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:ext4_do_writepages+0x4666/0x4670 fs/ext4/inode.c:2805
Code: c6 c0 45 e4 8b e8 8a 65 a2 fe 90 0f 0b e8 12 97 40 ff 4c 89 f7 48 c7 c6 a0 4a e4 8b e8 73 65 a2 fe 90 0f 0b e8 fb 96 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:ffffc9000d7c6d60 EFLAGS: 00010293
RAX: ffffffff8285ba85 RBX: 0000004210000000 RCX: ffff88807dd41e80
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000d7c7170 R08: ffff8880587c5547 R09: 1ffff1100b0f8aa8
R10: dffffc0000000000 R11: ffffed100b0f8aa9 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100fc3b0c5
FS:  0000000000000000(0000) GS:ffff888125448000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f274344eddd CR3: 0000000062928000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3022
 do_writepages+0x32e/0x550 mm/page-writeback.c:2554
 __writeback_single_inode+0x133/0x10e0 fs/fs-writeback.c:1750
 writeback_sb_inodes+0x979/0x19d0 fs/fs-writeback.c:2042
 wb_writeback+0x445/0xb00 fs/fs-writeback.c:2227
 wb_do_writeback fs/fs-writeback.c:2374 [inline]
 wb_workfn+0x3f8/0xf10 fs/fs-writeback.c:2414
 process_one_work+0x9a3/0x1710 kernel/workqueue.c:3288
 process_scheduled_works kernel/workqueue.c:3379 [inline]
 worker_thread+0xba8/0x11e0 kernel/workqueue.c:3465
 kthread+0x388/0x470 kernel/kthread.c:436
 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+0x4666/0x4670 fs/ext4/inode.c:2805
Code: c6 c0 45 e4 8b e8 8a 65 a2 fe 90 0f 0b e8 12 97 40 ff 4c 89 f7 48 c7 c6 a0 4a e4 8b e8 73 65 a2 fe 90 0f 0b e8 fb 96 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:ffffc9000d7c6d60 EFLAGS: 00010293
RAX: ffffffff8285ba85 RBX: 0000004210000000 RCX: ffff88807dd41e80
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000d7c7170 R08: ffff8880587c5547 R09: 1ffff1100b0f8aa8
R10: dffffc0000000000 R11: ffffed100b0f8aa9 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100fc3b0c5
FS:  0000000000000000(0000) GS:ffff888125448000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff3f208c30 CR3: 0000000026294000 CR4: 00000000003526f0