------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2826!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 16391 Comm: kworker/u9:0 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 00 a2 e4 8b e8 65 47 9f fe 90 0f 0b e8 bd 8d 3c ff 4c 89 f7 48 c7 c6 e0 a6 e4 8b e8 4e 47 9f fe 90 0f 0b e8 a6 8d 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:ffffc9000279ed60 EFLAGS: 00010293
RAX: ffffffff8288c52a RBX: 000000621000c000 RCX: ffff888102bfd940
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000279f170 R08: ffff888172619c5f R09: 1ffff1102e4c338b
R10: dffffc0000000000 R11: ffffed102e4c338c R12: ffffc9000279f520
R13: 1ffff920004f3ea4 R14: 0000004000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88818dca4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcd6bc3ea0 CR3: 00000001b9fee000 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+0x3f8/0xf10
 process_scheduled_works+0xa8e/0x14e0
 worker_thread+0xa47/0xfb0
 kthread+0x389/0x470
 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 00 a2 e4 8b e8 65 47 9f fe 90 0f 0b e8 bd 8d 3c ff 4c 89 f7 48 c7 c6 e0 a6 e4 8b e8 4e 47 9f fe 90 0f 0b e8 a6 8d 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:ffffc9000279ed60 EFLAGS: 00010293
RAX: ffffffff8288c52a RBX: 000000621000c000 RCX: ffff888102bfd940
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000279f170 R08: ffff888172619c5f R09: 1ffff1102e4c338b
R10: dffffc0000000000 R11: ffffed102e4c338c R12: ffffc9000279f520
R13: 1ffff920004f3ea4 R14: 0000004000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88818dca4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34822ff8 CR3: 000000010bbae000 CR4: 00000000000006f0
