loop0: detected capacity change from 0 to 1024
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
EXT4-fs error (device loop0): ext4_mb_mark_diskspace_used:4215: comm syz.0.0: Allocating blocks 385-513 which overlap fs metadata
EXT4-fs error (device loop0): ext4_mb_mark_diskspace_used:4215: comm syz.0.0: Allocating blocks 1-17 which overlap fs metadata
------------[ cut here ]------------
kernel BUG at fs/ext4/mballoc.c:4787!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5344 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 c4 4b a8 ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 b0 6f 40 ff 90 0f 0b e8 a8 6f 40 ff 90 0f 0b e8 a0 6f 40 ff 90 <0f> 0b e8 98 6f 40 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000d5e73a8 EFLAGS: 00010293
RAX: ffffffff828150f0 RBX: 00000000ffffffff RCX: ffff8880008724c0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: 1ffff11008eeddba R08: ffff88804776f24b R09: 1ffff11008eede49
R10: dffffc0000000000 R11: ffffed1008eede4a R12: 0000000000000004
R13: 0000000000000002 R14: 1ffff11008eede4c R15: ffff88804776f260
FS:  00007f2de1aa46c0(0000) GS:ffff88808d239000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2de1a61fc8 CR3: 000000000b6ec000 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_ext_map_blocks+0x1877/0x69c0 fs/ext4/extents.c:4383
 ext4_map_create_blocks fs/ext4/inode.c:613 [inline]
 ext4_map_blocks+0x82c/0x16f0 fs/ext4/inode.c:816
 ext4_alloc_file_blocks+0x422/0xdb0 fs/ext4/extents.c:4551
 ext4_zero_range+0x38c/0xb70 fs/ext4/extents.c:4644
 ext4_fallocate+0x334/0x3d0 fs/ext4/extents.c:4832
 vfs_fallocate+0x669/0x7e0 fs/open.c:339
 ksys_fallocate fs/open.c:363 [inline]
 __do_sys_fallocate fs/open.c:368 [inline]
 __se_sys_fallocate fs/open.c:366 [inline]
 __x64_sys_fallocate+0xc0/0x110 fs/open.c:366
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2de0b8f7c9
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:00007f2de1aa4038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f2de0de5fa0 RCX: 00007f2de0b8f7c9
RDX: 0000000000000fff RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f2de0c13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008800000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2de0de6038 R14: 00007f2de0de5fa0 R15: 00007ffe6ab64968
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4787
Code: e8 c4 4b a8 ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 b0 6f 40 ff 90 0f 0b e8 a8 6f 40 ff 90 0f 0b e8 a0 6f 40 ff 90 <0f> 0b e8 98 6f 40 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000d5e73a8 EFLAGS: 00010293
RAX: ffffffff828150f0 RBX: 00000000ffffffff RCX: ffff8880008724c0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: 1ffff11008eeddba R08: ffff88804776f24b R09: 1ffff11008eede49
R10: dffffc0000000000 R11: ffffed1008eede4a R12: 0000000000000004
R13: 0000000000000002 R14: 1ffff11008eede4c R15: ffff88804776f260
FS:  00007f2de1aa46c0(0000) GS:ffff88808d239000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2de1a61fc8 CR3: 000000000b6ec000 CR4: 0000000000352ef0