------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2809!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 40 Comm: kworker/u10:2 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-7:3)
RIP: 0010:ext4_do_writepages+0x4607/0x4610
Code: c6 c0 a0 be 8b e8 e9 15 b1 fe 90 0f 0b e8 31 75 49 ff 4c 89 f7 48 c7 c6 a0 a4 be 8b e8 d2 15 b1 fe 90 0f 0b e8 1a 75 49 ff 90 <0f> 0b 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900006eeca0 EFLAGS: 00010293
RAX: ffffffff8276e606 RBX: 0000004210000000 RCX: ffff888104b05700
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900006ef0d0 R08: ffff888113edb9b7 R09: 1ffff110227db736
R10: dffffc0000000000 R11: ffffed10227db737 R12: 0000000000000001
R13: ffffc900006ef120 R14: 0000004000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881a39fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055775974c7b8 CR3: 0000000108ac0000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ext4_writepages+0x205/0x350
 do_writepages+0x32e/0x550
 __writeback_single_inode+0x145/0xff0
 writeback_sb_inodes+0x6c7/0x1010
 wb_writeback+0x43b/0xaf0
 wb_workfn+0x409/0xef0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x4607/0x4610
Code: c6 c0 a0 be 8b e8 e9 15 b1 fe 90 0f 0b e8 31 75 49 ff 4c 89 f7 48 c7 c6 a0 a4 be 8b e8 d2 15 b1 fe 90 0f 0b e8 1a 75 49 ff 90 <0f> 0b 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900006eeca0 EFLAGS: 00010293
RAX: ffffffff8276e606 RBX: 0000004210000000 RCX: ffff888104b05700
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900006ef0d0 R08: ffff888113edb9b7 R09: 1ffff110227db736
R10: dffffc0000000000 R11: ffffed10227db737 R12: 0000000000000001
R13: ffffc900006ef120 R14: 0000004000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b83fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f513d373420 CR3: 000000002956a000 CR4: 00000000000006f0
