------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2813!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 84 Comm: kworker/u9:3 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-7:5)
RIP: 0010:ext4_do_writepages+0x46d6/0x46e0
Code: c6 80 0b e4 8b e8 fa 91 a1 fe 90 0f 0b e8 12 26 3f ff 4c 89 f7 48 c7 c6 60 10 e4 8b e8 e3 91 a1 fe 90 0f 0b e8 fb 25 3f 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:ffffc900017ded00 EFLAGS: 00010293
RAX: ffffffff828688f5 RBX: 0000004210000000 RCX: ffff8881023f9d40
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900017df110 R08: ffff888171f80057 R09: 1ffff1102e3f000a
R10: dffffc0000000000 R11: ffffed102e3f000b R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1102274b8c7
FS:  0000000000000000(0000) GS:ffff88818de57000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc80578bf0 CR3: 00000001b8062000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0
 do_writepages+0x32e/0x550
 __writeback_single_inode+0x133/0x11a0
 writeback_sb_inodes+0x992/0x1a20
 wb_writeback+0x456/0xb70
 wb_workfn+0x414/0xf50
 process_scheduled_works+0xb6e/0x18c0
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x46d6/0x46e0
Code: c6 80 0b e4 8b e8 fa 91 a1 fe 90 0f 0b e8 12 26 3f ff 4c 89 f7 48 c7 c6 60 10 e4 8b e8 e3 91 a1 fe 90 0f 0b e8 fb 25 3f 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:ffffc900017ded00 EFLAGS: 00010293
RAX: ffffffff828688f5 RBX: 0000004210000000 RCX: ffff8881023f9d40
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900017df110 R08: ffff888171f80057 R09: 1ffff1102e3f000a
R10: dffffc0000000000 R11: ffffed102e3f000b R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1102274b8c7
FS:  0000000000000000(0000) GS:ffff88818de57000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2a7d386980 CR3: 00000001131c0000 CR4: 00000000000006f0
