loop0: detected capacity change from 512 to 64
EXT4-fs error (device loop0): xattr_find_entry:333: inode #15: comm syz.0.0: corrupted xattr entries
syz.0.0: attempt to access beyond end of device
loop0: rw=2049, sector=392, nr_sectors = 2 limit=64
EXT4-fs warning (device loop0): ext4_end_bio:364: I/O error 10 writing to inode 15 starting block 196)
Buffer I/O error on device loop0, logical block 196
------------[ cut here ]------------
kernel BUG at fs/ext4/mballoc.c:4781!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5336 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:ext4_mb_use_inode_pa+0x6bf/0x720 fs/ext4/mballoc.c:4781
Code: e8 26 83 a1 ff 48 ba 00 00 00 00 00 fc ff df e9 d7 fa ff ff e8 12 07 2f ff 90 0f 0b e8 0a 07 2f ff 90 0f 0b e8 02 07 2f ff 90 <0f> 0b e8 fa 06 2f ff 90 0f 0b 48 8b 0c 24 48 83 c1 54 80 e1 07 80
RSP: 0000:ffffc9000f9fe840 EFLAGS: 00010283
RAX: ffffffff82991b2e RBX: 00000000ffffffff RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 00000000000059aa RDI: 00000000000059ab
RBP: 1ffff11008b1e8ef R08: ffff8880458f8e13 R09: 1ffff11008b1f1c2
R10: dffffc0000000000 R11: ffffed1008b1f1c3 R12: 0000000000000000
R13: 0000000000000014 R14: 1ffff11008b1f1c5 R15: ffff8880458f8e28
FS:  00007f23a9dd46c0(0000) GS:ffff88808b0b4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f369919ead8 CR3: 0000000013239000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ext4_mb_use_preallocated+0x638/0x13e0 fs/ext4/mballoc.c:4998
 ext4_mb_new_blocks+0x5a0/0x4530 fs/ext4/mballoc.c:6302
 ext4_alloc_branch fs/ext4/indirect.c:340 [inline]
 ext4_ind_map_blocks+0xe96/0x22a0 fs/ext4/indirect.c:635
 ext4_map_create_blocks+0xbb/0x530 fs/ext4/inode.c:632
 ext4_map_blocks+0x791/0x12c0 fs/ext4/inode.c:823
 mpage_map_one_extent fs/ext4/inode.c:2379 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2469 [inline]
 ext4_do_writepages+0x1901/0x4770 fs/ext4/inode.c:2938
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3032
 do_writepages+0x338/0x560 mm/page-writeback.c:2560
 filemap_writeback mm/filemap.c:387 [inline]
 filemap_fdatawrite_range mm/filemap.c:412 [inline]
 file_write_and_wait_range+0x36e/0x440 mm/filemap.c:786
 ext4_sync_file+0x252/0xa40 fs/ext4/fsync.c:145
 generic_write_sync include/linux/fs.h:2689 [inline]
 ext4_buffered_write_iter+0x2d0/0x380 fs/ext4/file.c:360
 ext4_file_write_iter+0xae4/0x1cd0 fs/ext4/file.c:-1
 aio_write+0x5d0/0x870 fs/aio.c:1687
 __io_submit_one fs/aio.c:-1 [inline]
 io_submit_one+0x798/0x13d0 fs/aio.c:2106
 __do_sys_io_submit fs/aio.c:2165 [inline]
 __se_sys_io_submit+0x195/0x340 fs/aio.c:2135
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f23ad99e559
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:00007f23a9dd3fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007f23adc26090 RCX: 00007f23ad99e559
RDX: 00002000000002c0 RSI: 0000000000000001 RDI: 00007f23ae766000
RBP: 00007f23ada35ab8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f23adc26128 R14: 00007f23adc26090 R15: 00007ffcd96133e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_mb_use_inode_pa+0x6bf/0x720 fs/ext4/mballoc.c:4781
Code: e8 26 83 a1 ff 48 ba 00 00 00 00 00 fc ff df e9 d7 fa ff ff e8 12 07 2f ff 90 0f 0b e8 0a 07 2f ff 90 0f 0b e8 02 07 2f ff 90 <0f> 0b e8 fa 06 2f ff 90 0f 0b 48 8b 0c 24 48 83 c1 54 80 e1 07 80
RSP: 0000:ffffc9000f9fe840 EFLAGS: 00010283
RAX: ffffffff82991b2e RBX: 00000000ffffffff RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 00000000000059aa RDI: 00000000000059ab
RBP: 1ffff11008b1e8ef R08: ffff8880458f8e13 R09: 1ffff11008b1f1c2
R10: dffffc0000000000 R11: ffffed1008b1f1c3 R12: 0000000000000000
R13: 0000000000000014 R14: 1ffff11008b1f1c5 R15: ffff8880458f8e28
FS:  00007f23a9dd46c0(0000) GS:ffff88808b0b4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f369919ead8 CR3: 0000000013239000 CR4: 0000000000352ef0