------------[ cut here ]------------
kernel BUG at fs/ext4/mballoc.c:4685!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5334 Comm: syz.0.0 Not tainted 6.15.0-rc2-syzkaller-00037-g834a4a689699 #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+0x690/0x700 fs/ext4/mballoc.c:4685
Code: 00 6e f0 8e 4c 89 e6 48 89 ea e8 cb 7e b7 02 e9 be fc ff ff e8 c1 f6 39 ff 90 0f 0b e8 b9 f6 39 ff 90 0f 0b e8 b1 f6 39 ff 90 <0f> 0b e8 a9 f6 39 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000ffcf368 EFLAGS: 00010293
RAX: ffffffff82895e7f RBX: 00000000ffffffff RCX: ffff8880007d4880
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: 0000000000000004 R08: ffffffff82895b7f R09: 1ffff110086f28a0
R10: dffffc0000000000 R11: ffffed10086f28a1 R12: ffff888043794518
R13: 1ffff11008a01f30 R14: 0000000000000002 R15: 1ffff110086f28a3
FS:  00007f6ba94756c0(0000) GS:ffff88808c593000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6ba9474fd8 CR3: 0000000040de2000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_mb_use_preallocated+0x680/0x1420 fs/ext4/mballoc.c:4902
 ext4_mb_new_blocks+0x6f1/0x4e10 fs/ext4/mballoc.c:6206
 ext4_ext_map_blocks+0x1c09/0x7d80 fs/ext4/extents.c:4379
 ext4_map_create_blocks fs/ext4/inode.c:520 [inline]
 ext4_map_blocks+0x91b/0x1920 fs/ext4/inode.c:706
 ext4_alloc_file_blocks+0x482/0xed0 fs/ext4/extents.c:4520
 ext4_zero_range+0x3ba/0xb50 fs/ext4/extents.c:4600
 ext4_fallocate+0x6e9/0xcc0 fs/ext4/extents.c:4772
 vfs_fallocate+0x627/0x7a0 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+0xbc/0x110 fs/open.c:365
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6ba858d169
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:00007f6ba9475038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f6ba87a6160 RCX: 00007f6ba858d169
RDX: 0000000000000fff RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f6ba860e990 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008800000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f6ba87a6160 R15: 00007ffe7b53b7e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_mb_use_inode_pa+0x690/0x700 fs/ext4/mballoc.c:4685
Code: 00 6e f0 8e 4c 89 e6 48 89 ea e8 cb 7e b7 02 e9 be fc ff ff e8 c1 f6 39 ff 90 0f 0b e8 b9 f6 39 ff 90 0f 0b e8 b1 f6 39 ff 90 <0f> 0b e8 a9 f6 39 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000ffcf368 EFLAGS: 00010293
RAX: ffffffff82895e7f RBX: 00000000ffffffff RCX: ffff8880007d4880
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: 0000000000000004 R08: ffffffff82895b7f R09: 1ffff110086f28a0
R10: dffffc0000000000 R11: ffffed10086f28a1 R12: ffff888043794518
R13: 1ffff11008a01f30 R14: 0000000000000002 R15: 1ffff110086f28a3
FS:  00007f6ba94756c0(0000) GS:ffff88808c593000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6ba9474fd8 CR3: 0000000040de2000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400