loop0: detected capacity change from 0 to 4096 ntfs3: loop0: Different NTFS sector size (4096) and media sector size (512). general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 1 PID: 5066 Comm: syz-executor488 Not tainted 6.8.0-rc3-syzkaller-00317-g7521f258ea30 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:attr_data_read_resident+0xad/0xa80 fs/ntfs3/attrib.c:1239 Code: 00 00 e8 f6 05 b6 fe bb ea ff ff ff e9 0a 05 00 00 48 8b 04 24 48 8d 58 20 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 35 23 18 ff 4c 8b 33 49 c1 e6 0c 4c RSP: 0018:ffffc90004217730 EFLAGS: 00010212 RAX: 0000000000000004 RBX: 0000000000000020 RCX: dffffc0000000000 RDX: ffff8880297b5940 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8880246c8108 R08: ffffffff82dd6562 R09: ffffffff82e66a99 R10: 0000000000000002 R11: ffff8880297b5940 R12: dffffc0000000000 R13: ffff88807b254a58 R14: 00000000000000a0 R15: ffff88807b2549c0 FS: 0000555556096380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000066c7e0 CR3: 000000007cbe4000 CR4: 0000000000350ef0 Call Trace: ntfs_get_block_vbo+0x312/0xd00 fs/ntfs3/inode.c:574 generic_block_bmap+0x13c/0x1f0 fs/buffer.c:2742 bmap+0xaa/0xe0 fs/inode.c:1790 ioctl_fibmap fs/ioctl.c:77 [inline] file_ioctl fs/ioctl.c:328 [inline] do_vfs_ioctl+0x2056/0x2b60 fs/ioctl.c:850 __do_sys_ioctl fs/ioctl.c:869 [inline] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:857 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f959f307639 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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:00007ffd254c3948 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f959f307639 RDX: 0000000020000040 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007f959f399610 R08: 0000000000000000 R09: 00007ffd254c3b18 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffd254c3b08 R14: 0000000000000001 R15: 0000000000000001 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:attr_data_read_resident+0xad/0xa80 fs/ntfs3/attrib.c:1239 Code: 00 00 e8 f6 05 b6 fe bb ea ff ff ff e9 0a 05 00 00 48 8b 04 24 48 8d 58 20 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 35 23 18 ff 4c 8b 33 49 c1 e6 0c 4c RSP: 0018:ffffc90004217730 EFLAGS: 00010212 RAX: 0000000000000004 RBX: 0000000000000020 RCX: dffffc0000000000 RDX: ffff8880297b5940 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8880246c8108 R08: ffffffff82dd6562 R09: ffffffff82e66a99 R10: 0000000000000002 R11: ffff8880297b5940 R12: dffffc0000000000 R13: ffff88807b254a58 R14: 00000000000000a0 R15: ffff88807b2549c0 FS: 0000555556096380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000066c7e0 CR3: 000000007cbe4000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: e8 f6 05 b6 fe call 0xfeb605fd 7: bb ea ff ff ff mov $0xffffffea,%ebx c: e9 0a 05 00 00 jmp 0x51b 11: 48 8b 04 24 mov (%rsp),%rax 15: 48 8d 58 20 lea 0x20(%rax),%rbx 19: 48 89 d8 mov %rbx,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 35 23 18 ff call 0xff18236d 38: 4c 8b 33 mov (%rbx),%r14 3b: 49 c1 e6 0c shl $0xc,%r14 3f: 4c rex.WR