BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 1e2b5067 P4D 1e2b5067 PUD 2a780067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 18204 Comm: syz-executor.0 Not tainted 6.1.0-syzkaller-13139-gf9ff5644bcc0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90003547ca8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff8880230dba80 RDX: 0000000000000000 RSI: ffffea000203bec0 RDI: ffff888032ec6bb8 RBP: ffffea000203bec0 R08: ffffffff81bc9c9b R09: fffff940004077d9 R10: fffff940004077d9 R11: 1ffffd40004077d8 R12: 0000000000000000 R13: 0000000000008000 R14: 1ffffd40004077d8 R15: ffffffffffffffff FS: 00007f5a0d87a700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000002825a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ntfs_sparse_cluster+0x767/0xa90 fs/ntfs3/file.c:335 ntfs_fallocate+0xbc6/0xfb0 fs/ntfs3/file.c:727 vfs_fallocate+0x515/0x670 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xb9/0x100 fs/open.c:352 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5a0ca8c0d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5a0d87a168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f5a0cbac050 RCX: 00007f5a0ca8c0d9 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007f5a0cae7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdad5da88f R14: 00007f5a0d87a300 R15: 0000000000022000 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90003547ca8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff8880230dba80 RDX: 0000000000000000 RSI: ffffea000203bec0 RDI: ffff888032ec6bb8 RBP: ffffea000203bec0 R08: ffffffff81bc9c9b R09: fffff940004077d9 R10: fffff940004077d9 R11: 1ffffd40004077d8 R12: 0000000000000000 R13: 0000000000008000 R14: 1ffffd40004077d8 R15: ffffffffffffffff FS: 00007f5a0d87a700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000002825a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400