loop0: detected capacity change from 0 to 512
EXT4-fs: inline encryption not supported
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
loop0: detected capacity change from 512 to 64
------------[ cut here ]------------
kernel BUG at fs/ext4/mballoc.c:4786!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5317 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+0x6c1/0x720 fs/ext4/mballoc.c:4786
Code: e8 14 63 a4 ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 d0 af 38 ff 90 0f 0b e8 c8 af 38 ff 90 0f 0b e8 c0 af 38 ff 90 <0f> 0b e8 b8 af 38 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000f5ce868 EFLAGS: 00010283
RAX: ffffffff828ceb60 RBX: 00000000ffffffbf RCX: 0000000000100000
RDX: ffffc9000ec32000 RSI: 000000000000af5d RDI: 000000000000af5e
RBP: 1ffff11008f70729 R08: ffff888047b87e13 R09: 1ffff11008f70fc2
R10: dffffc0000000000 R11: ffffed1008f70fc3 R12: 0000000000000000
R13: 0000000000000060 R14: 1ffff11008f70fc5 R15: ffff888047b87e28
FS:  00007ff0a1ff56c0(0000) GS:ffff88808ca5b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff0a1fd3ff0 CR3: 0000000044593000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ext4_mb_use_preallocated+0x660/0x13f0 fs/ext4/mballoc.c:5003
 ext4_mb_new_blocks+0x5e2/0x4780 fs/ext4/mballoc.c:6307
 ext4_alloc_branch fs/ext4/indirect.c:340 [inline]
 ext4_ind_map_blocks+0xe96/0x22c0 fs/ext4/indirect.c:635
 ext4_map_create_blocks+0xc1/0x540 fs/ext4/inode.c:618
 ext4_map_blocks+0x7cd/0x11d0 fs/ext4/inode.c:809
 mpage_map_one_extent fs/ext4/inode.c:2373 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2467 [inline]
 ext4_do_writepages+0x1916/0x46e0 fs/ext4/inode.c:2925
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3019
 do_writepages+0x32e/0x550 mm/page-writeback.c:2554
 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
 generic_buffers_fsync_noflush+0x70/0x1d0 fs/buffer.c:606
 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline]
 ext4_sync_file+0x321/0xb70 fs/ext4/fsync.c:147
 generic_write_sync include/linux/fs.h:2640 [inline]
 ext4_buffered_write_iter+0x2ca/0x3a0 fs/ext4/file.c:306
 ext4_file_write_iter+0x298/0x1bf0 fs/ext4/file.c:-1
 do_iter_readv_writev+0x619/0x8c0 fs/read_write.c:-1
 vfs_writev+0x33c/0x990 fs/read_write.c:1059
 do_pwritev fs/read_write.c:1155 [inline]
 __do_sys_pwritev2 fs/read_write.c:1213 [inline]
 __se_sys_pwritev2+0x184/0x2a0 fs/read_write.c:1204
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff0a5b9c629
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:00007ff0a1ff5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007ff0a5e15fa0 RCX: 00007ff0a5b9c629
RDX: 0000000000000001 RSI: 0000200000000240 RDI: 0000000000000007
RBP: 00007ff0a5c32b39 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000007800 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff0a5e16038 R14: 00007ff0a5e15fa0 R15: 00007ffc2a5021f8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4786
Code: e8 14 63 a4 ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 d0 af 38 ff 90 0f 0b e8 c8 af 38 ff 90 0f 0b e8 c0 af 38 ff 90 <0f> 0b e8 b8 af 38 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000f5ce868 EFLAGS: 00010283
RAX: ffffffff828ceb60 RBX: 00000000ffffffbf RCX: 0000000000100000
RDX: ffffc9000ec32000 RSI: 000000000000af5d RDI: 000000000000af5e
RBP: 1ffff11008f70729 R08: ffff888047b87e13 R09: 1ffff11008f70fc2
R10: dffffc0000000000 R11: ffffed1008f70fc3 R12: 0000000000000000
R13: 0000000000000060 R14: 1ffff11008f70fc5 R15: ffff888047b87e28
FS:  00007ff0a1ff56c0(0000) GS:ffff88808ca5b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff0a1fd3ff0 CR3: 0000000044593000 CR4: 0000000000352ef0