loop0: detected capacity change from 0 to 4096
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 61092067 P4D 61092067 PUD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4436 Comm: syz.0.40 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc9000302fcc0 EFLAGS: 00010296
RAX: 1ffffffff14b89b7 RBX: ffffea00017eaec8 RCX: ffffffff8a5c4db8
RDX: ffffc90003d73000 RSI: 0000000000000dc6 RDI: ffffea00017eaec0
RBP: 0000000000000000 R08: ffffea00017eaec7 R09: 1ffffd40002fd5d8
R10: dffffc0000000000 R11: fffff940002fd5d9 R12: ffffea00017eaec0
R13: ffffea00017eaec0 R14: ffffffffffffffff R15: 0000000000000001
FS:  00007f8ba213f6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000001ebe3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ntfs_sparse_cluster+0x82c/0xb80 fs/ntfs3/file.c:337
 ntfs_fallocate+0x76f/0xd60 fs/ntfs3/file.c:707
 vfs_fallocate+0x587/0x6f0 fs/open.c:308
 ksys_fallocate fs/open.c:331 [inline]
 __do_sys_fallocate fs/open.c:339 [inline]
 __se_sys_fallocate fs/open.c:337 [inline]
 __x64_sys_fallocate+0xbd/0x100 fs/open.c:337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8ba3ee5819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8ba213f028 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f8ba415efa0 RCX: 00007f8ba3ee5819
RDX: 0000000000000fff RSI: 0000000000000000 RDI: 000000000000000c
RBP: 00007f8ba3f7bc91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8ba415f038 R14: 00007f8ba415efa0 R15: 00007fff9f7e6d08
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 7bc65e16ecdfb0b9 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc9000302fcc0 EFLAGS: 00010296
RAX: 1ffffffff14b89b7 RBX: ffffea00017eaec8 RCX: ffffffff8a5c4db8
RDX: ffffc90003d73000 RSI: 0000000000000dc6 RDI: ffffea00017eaec0
RBP: 0000000000000000 R08: ffffea00017eaec7 R09: 1ffffd40002fd5d8
R10: dffffc0000000000 R11: fffff940002fd5d9 R12: ffffea00017eaec0
R13: ffffea00017eaec0 R14: ffffffffffffffff R15: 0000000000000001
FS:  00007f8ba213f6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000001ebe3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400