------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2826!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 6006 Comm: kworker/u8:12 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:ext4_do_writepages+0x2ddf/0x3ed0 fs/ext4/inode.c:2826
Code: a5 10 ff ff ff 48 c1 ea 03 80 3c 02 00 0f 84 fa e7 ff ff 48 8b bd 28 ff ff ff e8 dc 68 a3 ff e9 e9 e7 ff ff e8 92 ed 33 ff 90 <0f> 0b e8 8a ed 33 ff 89 9d f8 fe ff ff 44 0f b6 ad a3 fe ff ff e9
RSP: 0018:ffffc90005117260 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88806932b890 RCX: ffffffff82d554f1
RDX: ffff888032d31f00 RSI: ffffffff82d5716e RDI: ffff888032d31f00
RBP: ffffc90005117430 R08: 0000000000000007 R09: 0000000000000000
R10: 0000004000000000 R11: 0000000000000080 R12: 0000000000000001
R13: ffff88806932ba80 R14: 1ffff92000a22e6c R15: ffffc90005117480
FS:  0000000000000000(0000) GS:ffff8881241e1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555c749fead0 CR3: 0000000069cdb000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 ext4_writepages+0x347/0x750 fs/ext4/inode.c:3043
 do_writepages+0x278/0x600 mm/page-writeback.c:2571
 __writeback_single_inode+0x164/0x1300 fs/fs-writeback.c:1787
 writeback_sb_inodes+0x766/0x1c50 fs/fs-writeback.c:2079
 wb_writeback+0x1c0/0xb50 fs/fs-writeback.c:2264
 wb_do_writeback fs/fs-writeback.c:2432 [inline]
 wb_workfn+0x143/0xc80 fs/fs-writeback.c:2477
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 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+0x2ddf/0x3ed0 fs/ext4/inode.c:2826
Code: a5 10 ff ff ff 48 c1 ea 03 80 3c 02 00 0f 84 fa e7 ff ff 48 8b bd 28 ff ff ff e8 dc 68 a3 ff e9 e9 e7 ff ff e8 92 ed 33 ff 90 <0f> 0b e8 8a ed 33 ff 89 9d f8 fe ff ff 44 0f b6 ad a3 fe ff ff e9
RSP: 0018:ffffc90005117260 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88806932b890 RCX: ffffffff82d554f1
RDX: ffff888032d31f00 RSI: ffffffff82d5716e RDI: ffff888032d31f00
RBP: ffffc90005117430 R08: 0000000000000007 R09: 0000000000000000
R10: 0000004000000000 R11: 0000000000000080 R12: 0000000000000001
R13: ffff88806932ba80 R14: 1ffff92000a22e6c R15: ffffc90005117480
FS:  0000000000000000(0000) GS:ffff8881241e1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f435ffed2f8 CR3: 000000000e792000 CR4: 0000000000350ef0