------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2826!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 1124 Comm: kworker/u9:8 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-7:1)
RIP: 0010:ext4_do_writepages+0x465f/0x4670
Code: c6 a0 4b e4 8b e8 21 0b a1 fe 90 0f 0b e8 b9 a0 3e ff 4c 89 f7 48 c7 c6 80 50 e4 8b e8 0a 0b a1 fe 90 0f 0b e8 a2 a0 3e ff 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0000:ffffc900073d6d00 EFLAGS: 00010293
RAX: ffffffff8287030e RBX: 0000004210000000 RCX: ffff888106fb9d80
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900073d7110 R08: ffff8881bae78057 R09: 1ffff110375cf00a
R10: dffffc0000000000 R11: ffffed10375cf00b R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff11036b4c0c5
FS:  0000000000000000(0000) GS:ffff88818dc93000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffd3140c8c CR3: 00000001bf15e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0
 do_writepages+0x32e/0x550
 __writeback_single_inode+0x133/0x10e0
 writeback_sb_inodes+0x979/0x19d0
 wb_writeback+0x445/0xb00
 wb_workfn+0x3f8/0xf10
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x465f/0x4670
Code: c6 a0 4b e4 8b e8 21 0b a1 fe 90 0f 0b e8 b9 a0 3e ff 4c 89 f7 48 c7 c6 80 50 e4 8b e8 0a 0b a1 fe 90 0f 0b e8 a2 a0 3e ff 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0000:ffffc900073d6d00 EFLAGS: 00010293
RAX: ffffffff8287030e RBX: 0000004210000000 RCX: ffff888106fb9d80
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900073d7110 R08: ffff8881bae78057 R09: 1ffff110375cf00a
R10: dffffc0000000000 R11: ffffed10375cf00b R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff11036b4c0c5
FS:  0000000000000000(0000) GS:ffff88818dc93000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9729d12ff8 CR3: 000000011571c000 CR4: 00000000000006f0
