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kernel BUG at fs/ext4/inode.c:2810!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 7352 Comm: syz.8.178 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+0x45f4/0x4600
Code: c6 80 2a 9f 8b e8 9c 74 aa fe 90 0f 0b e8 14 9f 44 ff 4c 89 f7 48 c7 c6 60 2e 9f 8b e8 85 74 aa fe 90 0f 0b e8 fd 9e 44 ff 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003947140 EFLAGS: 00010293
RAX: ffffffff827d9653 RBX: 0000004210000000 RCX: ffff888110e80000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90003947550 R08: ffff8881b87773d7 R09: 1ffff110370eee7a
R10: dffffc0000000000 R11: ffffed10370eee7b R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1102d5efcc7
FS:  00007f83c01bd6c0(0000) GS:ffff8882a99f4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 00000001a775e000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0
 do_writepages+0x32e/0x550
 file_write_and_wait_range+0x36e/0x440
 generic_buffers_fsync_noflush+0x70/0x1d0
 ext4_sync_file+0x321/0xad0
 ext4_buffered_write_iter+0x2ca/0x3a0
 ext4_file_write_iter+0x298/0x1c10
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f83bf39acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f83c01bd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f83bf615fa0 RCX: 00007f83bf39acb9
RDX: 0000000000000003 RSI: 0000200000000000 RDI: 0000000000000028
RBP: 00007f83bf408bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f83bf616038 R14: 00007f83bf615fa0 R15: 00007ffe4f1a5728
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x45f4/0x4600
Code: c6 80 2a 9f 8b e8 9c 74 aa fe 90 0f 0b e8 14 9f 44 ff 4c 89 f7 48 c7 c6 60 2e 9f 8b e8 85 74 aa fe 90 0f 0b e8 fd 9e 44 ff 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003947140 EFLAGS: 00010293

RAX: ffffffff827d9653 RBX: 0000004210000000 RCX: ffff888110e80000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc90003947550 R08: ffff8881b87773d7 R09: 1ffff110370eee7a
R10: dffffc0000000000 R11: ffffed10370eee7b R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1102d5efcc7
FS:  00007f83c01bd6c0(0000) GS:ffff88818e3f4000(0000) knlGS:0000000000000000
