ntfs: (device loop6): ntfs_ucstonls(): Unicode name contains characters that cannot be converted to character set cp932. You might want to try to use the mount option nls=utf8. general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] CPU: 0 PID: 4580 Comm: syz-executor Not tainted 5.15.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:traverse_mounts fs/namei.c:1378 [inline] RIP: 0010:handle_mounts fs/namei.c:1498 [inline] RIP: 0010:step_into+0x12e/0xd00 fs/namei.c:1806 Code: 4c 8b 74 24 18 c6 44 24 7f 00 43 0f b6 44 25 00 84 c0 0f 85 6c 0a 00 00 45 8b 36 4c 8b bc 24 a8 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 6b 0a 00 00 45 8b 3f 44 89 fe 81 e6 00 RSP: 0018:ffffc90002e0fae0 EFLAGS: 00010206 RAX: 0000000000000003 RBX: ffffc90002e0fcc0 RCX: ffff88802116d940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002e0fbe8 R08: 0000000000000000 R09: ffffed100959b081 R10: ffffed100959b081 R11: 1ffff1100959b080 R12: dffffc0000000000 R13: 1ffff920005c1f9f R14: 0000000000000080 R15: 0000000000000018 FS: 000055557dc54500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557dc7f648 CR3: 00000000728e5000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lookup_last fs/namei.c:2431 [inline] path_lookupat+0x169/0x440 fs/namei.c:2455 filename_lookup+0x1e2/0x4f0 fs/namei.c:2484 user_path_at_empty+0x40/0x190 fs/namei.c:2883 user_path_at include/linux/namei.h:57 [inline] ksys_umount fs/namespace.c:1781 [inline] __do_sys_umount fs/namespace.c:1789 [inline] __se_sys_umount fs/namespace.c:1787 [inline] __x64_sys_umount+0xf1/0x160 fs/namespace.c:1787 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: 0033:0x7ff4a8c0cc97 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffccebdfc28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff4a8c0cc97 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffccebdfce0 RBP: 00007ffccebdfce0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffccebe0dd0 R13: 00007ff4a8c8d89d R14: 000055557dc544a8 R15: 00007ffccebe2f90 Modules linked in: ---[ end trace 26ac40960105e041 ]--- RIP: 0010:traverse_mounts fs/namei.c:1378 [inline] RIP: 0010:handle_mounts fs/namei.c:1498 [inline] RIP: 0010:step_into+0x12e/0xd00 fs/namei.c:1806 Code: 4c 8b 74 24 18 c6 44 24 7f 00 43 0f b6 44 25 00 84 c0 0f 85 6c 0a 00 00 45 8b 36 4c 8b bc 24 a8 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 6b 0a 00 00 45 8b 3f 44 89 fe 81 e6 00 RSP: 0018:ffffc90002e0fae0 EFLAGS: 00010206 RAX: 0000000000000003 RBX: ffffc90002e0fcc0 RCX: ffff88802116d940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002e0fbe8 R08: 0000000000000000 R09: ffffed100959b081 R10: ffffed100959b081 R11: 1ffff1100959b080 R12: dffffc0000000000 R13: 1ffff920005c1f9f R14: 0000000000000080 R15: 0000000000000018 FS: 000055557dc54500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d6fa3e7950 CR3: 00000000728e5000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4c 8b 74 24 18 mov 0x18(%rsp),%r14 5: c6 44 24 7f 00 movb $0x0,0x7f(%rsp) a: 43 0f b6 44 25 00 movzbl 0x0(%r13,%r12,1),%eax 10: 84 c0 test %al,%al 12: 0f 85 6c 0a 00 00 jne 0xa84 18: 45 8b 36 mov (%r14),%r14d 1b: 4c 8b bc 24 a8 00 00 mov 0xa8(%rsp),%r15 22: 00 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 6b 0a 00 00 jne 0xaa2 37: 45 8b 3f mov (%r15),%r15d 3a: 44 89 fe mov %r15d,%esi 3d: 81 .byte 0x81 3e: e6 00 out %al,$0x0