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:4787!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5337 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~bpo12+1 04/01/2014
RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4787
Code: e8 64 61 a8 ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 e0 b6 40 ff 90 0f 0b e8 d8 b6 40 ff 90 0f 0b e8 d0 b6 40 ff 90 <0f> 0b e8 c8 b6 40 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000d8ee888 EFLAGS: 00010293
RAX: ffffffff82805090 RBX: 00000000ffffffbf RCX: ffff888036f24980
RDX: 0000000000000000 RSI: 0000000000000060 RDI: 000000000000001f
RBP: 1ffff11008e73a07 R08: ffff88804739e333 R09: 1ffff11008e73c66
R10: dffffc0000000000 R11: ffffed1008e73c67 R12: 0000000000000000
R13: 0000000000000060 R14: 1ffff11008e73c69 R15: ffff88804739e348
FS:  00007f07b7a3c6c0(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000011881000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ext4_mb_use_preallocated+0x660/0x13f0 fs/ext4/mballoc.c:5004
 ext4_mb_new_blocks+0x5a1/0x46a0 fs/ext4/mballoc.c:6308
 ext4_alloc_branch fs/ext4/indirect.c:340 [inline]
 ext4_ind_map_blocks+0xe22/0x2190 fs/ext4/indirect.c:635
 ext4_map_create_blocks fs/ext4/inode.c:615 [inline]
 ext4_map_blocks+0x7d2/0x16f0 fs/ext4/inode.c:816
 mpage_map_one_extent fs/ext4/inode.c:2380 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2474 [inline]
 ext4_do_writepages+0x18bb/0x4500 fs/ext4/inode.c:2932
 ext4_writepages+0x203/0x350 fs/ext4/inode.c:3026
 do_writepages+0x32e/0x550 mm/page-writeback.c:2598
 filemap_writeback mm/filemap.c:387 [inline]
 filemap_fdatawrite_range mm/filemap.c:412 [inline]
 file_write_and_wait_range+0x23e/0x340 mm/filemap.c:786
 generic_buffers_fsync_noflush+0x70/0x1d0 fs/buffer.c:609
 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline]
 ext4_sync_file+0x322/0xae0 fs/ext4/fsync.c:147
 generic_write_sync include/linux/fs.h:2616 [inline]
 ext4_buffered_write_iter+0x2ca/0x3a0 fs/ext4/file.c:305
 ext4_file_write_iter+0x292/0x1bc0 fs/ext4/file.c:-1
 do_iter_readv_writev+0x623/0x8c0 fs/read_write.c:-1
 vfs_writev+0x31a/0x960 fs/read_write.c:1057
 do_pwritev fs/read_write.c:1153 [inline]
 __do_sys_pwritev2 fs/read_write.c:1211 [inline]
 __se_sys_pwritev2+0x179/0x290 fs/read_write.c:1202
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f07b6b8f7c9
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:00007f07b7a3c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f07b6de5fa0 RCX: 00007f07b6b8f7c9
RDX: 0000000000000001 RSI: 0000200000000240 RDI: 0000000000000006
RBP: 00007f07b6c13f91 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000007800 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f07b6de6038 R14: 00007f07b6de5fa0 R15: 00007ffeba6f9288
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4787
Code: e8 64 61 a8 ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 e0 b6 40 ff 90 0f 0b e8 d8 b6 40 ff 90 0f 0b e8 d0 b6 40 ff 90 <0f> 0b e8 c8 b6 40 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000d8ee888 EFLAGS: 00010293
RAX: ffffffff82805090 RBX: 00000000ffffffbf RCX: ffff888036f24980
RDX: 0000000000000000 RSI: 0000000000000060 RDI: 000000000000001f
RBP: 1ffff11008e73a07 R08: ffff88804739e333 R09: 1ffff11008e73c66
R10: dffffc0000000000 R11: ffffed1008e73c67 R12: 0000000000000000
R13: 0000000000000060 R14: 1ffff11008e73c69 R15: ffff88804739e348
FS:  00007f07b7a3c6c0(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000011881000 CR4: 0000000000352ef0