------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2809!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 8754 Comm: syz.1.657 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
RIP: 0010:ext4_do_writepages+0x4607/0x4610
Code: c6 20 a7 7e 8b e8 09 38 b1 fe 90 0f 0b e8 61 50 49 ff 4c 89 f7 48 c7 c6 00 ab 7e 8b e8 f2 37 b1 fe 90 0f 0b e8 4a 50 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:ffffc90004b77480 EFLAGS: 00010293
RAX: ffffffff8276b646 RBX: 0000004a10000000 RCX: ffff8881b51b5700
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90004b778b0 R08: ffff8881ac46c347 R09: 1ffff1103588d868
R10: dffffc0000000000 R11: ffffed103588d869 R12: 0000000000000001
R13: ffffc90004b77900 R14: 0000004000000000 R15: dffffc0000000000
FS:  0000555582f63500(0000) GS:ffff8882a9f3d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31805ff8 CR3: 000000016d3d8000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ext4_writepages+0x205/0x350
 do_writepages+0x32e/0x550
 filemap_flush+0x191/0x230
 ext4_release_file+0x82/0x310
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xe9/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f110eb8efc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffb8fcc8c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f110ede7da0 RCX: 00007f110eb8efc9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f110ede7da0 R08: 0000000000000000 R09: 00000014b8fccbbf
R10: 000000000003fd1c R11: 0000000000000246 R12: 00000000000296af
R13: 00007f110ede6180 R14: ffffffffffffffff R15: 00007fffb8fcc9e0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x4607/0x4610
Code: c6 20 a7 7e 8b e8 09 38 b1 fe 90 0f 0b e8 61 50 49 ff 4c 89 f7 48 c7 c6 00 ab 7e 8b e8 f2 37 b1 fe 90 0f 0b e8 4a 50 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:ffffc90004b77480 EFLAGS: 00010293
RAX: ffffffff8276b646 RBX: 0000004a10000000 RCX: ffff8881b51b5700
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90004b778b0 R08: ffff8881ac46c347 R09: 1ffff1103588d868
R10: dffffc0000000000 R11: ffffed103588d869 R12: 0000000000000001
R13: ffffc90004b77900 R14: 0000004000000000 R15: dffffc0000000000
FS:  0000555582f63500(0000) GS:ffff8882a9f3d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31805ff8 CR3: 000000016d3d8000 CR4: 00000000000006f0
