------------[ cut here ]------------
kernel BUG at fs/ext4/mballoc.c:4685!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5337 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-08685-g260f6f4fda93 #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 b4 41 ab ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 b0 b8 46 ff 90 0f 0b e8 a8 b8 46 ff 90 0f 0b e8 a0 b8 46 ff 90 <0f> 0b e8 98 b8 46 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000d5f73e8 EFLAGS: 00010293
RAX: ffffffff8278e420 RBX: 00000000ffffffff RCX: ffff888000f42440
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: 1ffff110087f3b30 R08: ffff888043f9e41b R09: 1ffff110087f3c83
R10: dffffc0000000000 R11: ffffed10087f3c84 R12: 0000000000000004
R13: 0000000000000002 R14: 1ffff110087f3c86 R15: ffff888043f9e430
FS:  00007fbd3dcae6c0(0000) GS:ffff88808d26e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbd3dcadfc8 CR3: 0000000043494000 CR4: 0000000000352ef0
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+0x161a/0x6ac0 fs/ext4/extents.c:4383
 ext4_map_create_blocks fs/ext4/inode.c:609 [inline]
 ext4_map_blocks+0x931/0x18d0 fs/ext4/inode.c:813
 ext4_alloc_file_blocks+0x42c/0xdb0 fs/ext4/extents.c:4551
 ext4_zero_range+0x39c/0xb90 fs/ext4/extents.c:4644
 ext4_fallocate+0x334/0x3d0 fs/ext4/extents.c:4832
 vfs_fallocate+0x669/0x7e0 fs/open.c:342
 ksys_fallocate fs/open.c:366 [inline]
 __do_sys_fallocate fs/open.c:371 [inline]
 __se_sys_fallocate fs/open.c:369 [inline]
 __x64_sys_fallocate+0xc0/0x110 fs/open.c:369
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbd3cd8eb69
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:00007fbd3dcae038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fbd3cfb6080 RCX: 00007fbd3cd8eb69
RDX: 0000000000000fff RSI: 0000000000000011 RDI: 0000000000000005
RBP: 00007fbd3ce11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008800000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbd3cfb6080 R15: 00007ffdcd199848
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4685
Code: e8 b4 41 ab ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 b0 b8 46 ff 90 0f 0b e8 a8 b8 46 ff 90 0f 0b e8 a0 b8 46 ff 90 <0f> 0b e8 98 b8 46 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000d5f73e8 EFLAGS: 00010293
RAX: ffffffff8278e420 RBX: 00000000ffffffff RCX: ffff888000f42440
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: 1ffff110087f3b30 R08: ffff888043f9e41b R09: 1ffff110087f3c83
R10: dffffc0000000000 R11: ffffed10087f3c84 R12: 0000000000000004
R13: 0000000000000002 R14: 1ffff110087f3c86 R15: ffff888043f9e430
FS:  00007fbd3dcae6c0(0000) GS:ffff88808d26e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbd3dcadfc8 CR3: 0000000043494000 CR4: 0000000000352ef0