------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2826!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 36 Comm: kworker/u10:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:ext4_do_writepages+0x479b/0x47a0 fs/ext4/inode.c:2825
Code: c6 00 a1 e4 8b e8 05 4b 9f fe 90 0f 0b e8 5d 91 3c ff 4c 89 f7 48 c7 c6 e0 a5 e4 8b e8 ee 4a 9f fe 90 0f 0b e8 46 91 3c ff 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f
RSP: 0018:ffffc90000ac6d60 EFLAGS: 00010293
RAX: ffffffff8288c18a RBX: 000000621000c000 RCX: ffff8881607d9dc0
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90000ac7170 R08: ffff8881b2198057 R09: 1ffff1103643300a
R10: dffffc0000000000 R11: ffffed103643300b R12: ffffc90000ac7520
R13: 1ffff92000158ea4 R14: 0000004000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8882a92a4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd95016e40 CR3: 00000001be1da000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3042
 do_writepages+0x338/0x560 mm/page-writeback.c:2571
 __writeback_single_inode+0x12e/0xf90 fs/fs-writeback.c:1764
 writeback_sb_inodes+0x9de/0x1b00 fs/fs-writeback.c:2056
 wb_writeback+0x41c/0xad0 fs/fs-writeback.c:2241
 wb_do_writeback fs/fs-writeback.c:2388 [inline]
 wb_workfn+0x3f8/0xf10 fs/fs-writeback.c:2428
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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+0x479b/0x47a0 fs/ext4/inode.c:2825
Code: c6 00 a1 e4 8b e8 05 4b 9f fe 90 0f 0b e8 5d 91 3c ff 4c 89 f7 48 c7 c6 e0 a5 e4 8b e8 ee 4a 9f fe 90 0f 0b e8 46 91 3c ff 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f
RSP: 0018:ffffc90000ac6d60 EFLAGS: 00010293
RAX: ffffffff8288c18a RBX: 000000621000c000 RCX: ffff8881607d9dc0
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90000ac7170 R08: ffff8881b2198057 R09: 1ffff1103643300a
R10: dffffc0000000000 R11: ffffed103643300b R12: ffffc90000ac7520
R13: 1ffff92000158ea4 R14: 0000004000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8882a92a4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000013b9ec14c000 CR3: 00000001be1da000 CR4: 00000000000006f0
