------------[ cut here ]------------
kernel BUG at fs/ext4/mballoc.c:4685!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5313 Comm: syz.0.0 Not tainted 6.15.0-rc5-syzkaller-00038-g707df3375124 #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:4685
Code: e8 14 ec ab ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 a0 f7 49 ff 90 0f 0b e8 98 f7 49 ff 90 0f 0b e8 90 f7 49 ff 90 <0f> 0b e8 88 f7 49 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000d4973e8 EFLAGS: 00010293
RAX: ffffffff8275d8c0 RBX: 00000000ffffffff RCX: ffff88801f4dc880
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: 1ffff11008a00130 R08: ffff88804500141b R09: 1ffff11008a00283
R10: dffffc0000000000 R11: ffffed1008a00284 R12: 0000000000000004
R13: 0000000000000002 R14: 1ffff11008a00286 R15: ffff888045001430
FS:  00007f5ac2dff6c0(0000) GS:ffff88808d6cb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5ac2dfefc8 CR3: 0000000043490000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_mb_use_preallocated+0x660/0x13f0 fs/ext4/mballoc.c:4902
 ext4_mb_new_blocks+0x5b4/0x46a0 fs/ext4/mballoc.c:6206
 ext4_ext_map_blocks+0x1618/0x67c0 fs/ext4/extents.c:4379
 ext4_map_create_blocks fs/ext4/inode.c:520 [inline]
 ext4_map_blocks+0x807/0x1740 fs/ext4/inode.c:706
 ext4_alloc_file_blocks+0x3b8/0xc60 fs/ext4/extents.c:4520
 ext4_zero_range+0x39b/0xb90 fs/ext4/extents.c:4600
 ext4_fallocate+0x74c/0xcd0 fs/ext4/extents.c:4772
 vfs_fallocate+0x6a0/0x830 fs/open.c:338
 ksys_fallocate fs/open.c:362 [inline]
 __do_sys_fallocate fs/open.c:367 [inline]
 __se_sys_fallocate fs/open.c:365 [inline]
 __x64_sys_fallocate+0xc0/0x110 fs/open.c:365
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5ac1f8e969
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:00007f5ac2dff038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f5ac21b6080 RCX: 00007f5ac1f8e969
RDX: 0000000000000fff RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f5ac2010ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008800000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5ac21b6080 R15: 00007ffda29130b8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4685
Code: e8 14 ec ab ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 a0 f7 49 ff 90 0f 0b e8 98 f7 49 ff 90 0f 0b e8 90 f7 49 ff 90 <0f> 0b e8 88 f7 49 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000d4973e8 EFLAGS: 00010293
RAX: ffffffff8275d8c0 RBX: 00000000ffffffff RCX: ffff88801f4dc880
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: 1ffff11008a00130 R08: ffff88804500141b R09: 1ffff11008a00283
R10: dffffc0000000000 R11: ffffed1008a00284 R12: 0000000000000004
R13: 0000000000000002 R14: 1ffff11008a00286 R15: ffff888045001430
FS:  00007f5ac2dff6c0(0000) GS:ffff88808d6cb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5ac2dfefc8 CR3: 0000000043490000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400