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kernel BUG at fs/ext4/inode.c:2809!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6274 Comm: syz.0.47 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 c0 79 9e 8b e8 99 9f b4 fe 90 0f 0b e8 11 4f 4c ff 4c 89 f7 48 c7 c6 a0 7d 9e 8b e8 82 9f b4 fe 90 0f 0b e8 fa 4e 4c 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:ffffc900045e69e0 EFLAGS: 00010293
RAX: ffffffff82735c96 RBX: 0000004610000000 RCX: ffff88810a34d640
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900045e6e10 R08: ffff888103511d07 R09: 1ffff110206a23a0
R10: dffffc0000000000 R11: ffffed10206a23a1 R12: 0000000000000001
R13: ffffc900045e6e60 R14: 0000004000000000 R15: dffffc0000000000
FS:  00007ff6f8dee6c0(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056325240b6b0 CR3: 0000000024522000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ext4_writepages+0x205/0x350
 do_writepages+0x32e/0x550
 filemap_write_and_wait_range+0x21f/0x320
 kiocb_invalidate_pages+0xb4/0x140
 __iomap_dio_rw+0x9f8/0x1e30
 iomap_dio_rw+0x45/0xb0
 ext4_file_write_iter+0x16a2/0x1bc0
 iter_file_splice_write+0x975/0x10e0
 direct_splice_actor+0x101/0x160
 splice_direct_to_actor+0x5a8/0xcc0
 do_splice_direct+0x181/0x270
 do_sendfile+0x4da/0x7e0
 __se_sys_sendfile64+0x13e/0x190
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff6fab8ebe9
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:00007ff6f8dee038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007ff6fadb5fa0 RCX: 00007ff6fab8ebe9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007ff6fac11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff6fadb6038 R14: 00007ff6fadb5fa0 R15: 00007ffee5b5e658
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x4607/0x4610
Code: c6 c0 79 9e 8b e8 99 9f b4 fe 90 0f 0b e8 11 4f 4c ff 4c 89 f7 48 c7 c6 a0 7d 9e 8b e8 82 9f b4 fe 90 0f 0b e8 fa 4e 4c 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:ffffc900045e69e0 EFLAGS: 00010293
RAX: ffffffff82735c96 RBX: 0000004610000000 RCX: ffff88810a34d640
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc900045e6e10 R08: ffff888103511d07 R09: 1ffff110206a23a0
R10: dffffc0000000000 R11: ffffed10206a23a1 R12: 0000000000000001
R13: ffffc900045e6e60 R14: 0000004000000000 R15: dffffc0000000000
FS:  00007ff6f8dee6c0(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4e1f41f000 CR3: 0000000024522000 CR4: 00000000000006f0
