------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2827!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 8849 Comm: kworker/u9:17 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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-7:4)
RIP: 0010:ext4_do_writepages+0x479b/0x47a0
Code: c6 a0 de 04 8c e8 95 36 9b fe 90 0f 0b e8 bd 09 3a ff 4c 89 f7 48 c7 c6 80 e3 04 8c e8 7e 36 9b fe 90 0f 0b e8 a6 09 3a 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:ffffc9000b9bed00 EFLAGS: 00010293
RAX: ffffffff828ce19a RBX: 0000004210000000 RCX: ffff88810d1c5a00
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000b9bf110 R08: ffff888109bad4b7 R09: 1ffff11021375a96
R10: dffffc0000000000 R11: ffffed1021375a97 R12: ffffc9000b9bf4c0
R13: 1ffff92001737e98 R14: 0000004000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88818d95c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc6cb36ed0 CR3: 000000016e922000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0
 do_writepages+0x338/0x560
 __writeback_single_inode+0x12e/0xf90
 writeback_sb_inodes+0x9de/0x1b00
 wb_writeback+0x41c/0xad0
 wb_workfn+0x431/0x10f0
 process_scheduled_works+0xa8e/0x14e0
 worker_thread+0xa47/0xfb0
 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+0x479b/0x47a0
Code: c6 a0 de 04 8c e8 95 36 9b fe 90 0f 0b e8 bd 09 3a ff 4c 89 f7 48 c7 c6 80 e3 04 8c e8 7e 36 9b fe 90 0f 0b e8 a6 09 3a 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:ffffc9000b9bed00 EFLAGS: 00010293
RAX: ffffffff828ce19a RBX: 0000004210000000 RCX: ffff88810d1c5a00
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000b9bf110 R08: ffff888109bad4b7 R09: 1ffff11021375a96
R10: dffffc0000000000 R11: ffffed1021375a97 R12: ffffc9000b9bf4c0
R13: 1ffff92001737e98 R14: 0000004000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88818d95c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc6cb36ed0 CR3: 000000016e922000 CR4: 00000000000006f0
