BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 598b7067 P4D 598b7067 PUD 58f9d067 PMD 0 Oops: Oops: 0010 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 PID: 6617 Comm: syz-executor.0 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90002a276e8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88804e6cd598 RCX: ffffffff81c40e00 RDX: 1ffffffff16c77ff RSI: ffffea0000acea80 RDI: ffff88804e6cd598 RBP: ffffffff8b63bfe0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 000000000000000c R12: ffffea0000acea80 R13: ffffea0000acea80 R14: ffffea0000acea80 R15: ffff88804e6cd120 FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5e8bb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000005d7ca000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: folio_mark_dirty+0xce/0x150 mm/page-writeback.c:2860 attr_make_nonresident+0x930/0xf50 fs/ntfs3/attrib.c:301 attr_set_size_res fs/ntfs3/attrib.c:371 [inline] attr_set_size+0x124b/0x2b90 fs/ntfs3/attrib.c:432 ntfs_set_size+0x13d/0x220 fs/ntfs3/inode.c:851 ntfs_extend+0x401/0x570 fs/ntfs3/file.c:335 ntfs_file_write_iter+0x433/0x2050 fs/ntfs3/file.c:1124 new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6b6/0x1140 fs/read_write.c:590 ksys_write+0x12f/0x260 fs/read_write.c:643 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf72ba579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5e8b5ac EFLAGS: 00000292 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000140 RDX: 000000000000fcb8 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90002a276e8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88804e6cd598 RCX: ffffffff81c40e00 RDX: 1ffffffff16c77ff RSI: ffffea0000acea80 RDI: ffff88804e6cd598 RBP: ffffffff8b63bfe0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 000000000000000c R12: ffffea0000acea80 R13: ffffea0000acea80 R14: ffffea0000acea80 R15: ffff88804e6cd120 FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5e8bb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000005d7ca000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi