Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 UID: 0 PID: 18148 Comm: syz.1.2563 Tainted: G     U              6.15.0-rc6-syzkaller-00051-g405e6c37c89e #0 PREEMPT(full) 
Tainted: [U]=USER
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:is_anon_ns fs/mount.h:165 [inline]
RIP: 0010:do_move_mount+0x1fd/0x1930 fs/namespace.c:3648
Code: 03 80 3c 02 00 0f 85 65 13 00 00 49 8d 44 24 48 4d 8b 76 18 48 89 c2 48 89 44 24 40 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 78 13 00 00 49 8b 44 24 48 48 89 44 24 20 4d 39
RSP: 0018:ffffc90004447db8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888030063380 RCX: ffffc9000e9a9000
RDX: 0000000000000006 RSI: ffffffff823c0404 RDI: ffff888065c54c48
RBP: ffff888141ed83a0 R08: 0000000000000007 R09: fffffffffffff000
R10: ffff888030063380 R11: 0000000000000000 R12: ffffffffffffffea
R13: ffff88807c8f2600 R14: ffff88807c8f2600 R15: ffffc90004447e90
FS:  00007f074b4726c0(0000) GS:ffff888124aea000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d41aff8 CR3: 00000000612ca000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vfs_move_mount fs/namespace.c:4605 [inline]
 vfs_move_mount fs/namespace.c:4593 [inline]
 __do_sys_move_mount+0x555/0x7c0 fs/namespace.c:4678
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f074a58e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f074b472038 EFLAGS: 00000246 ORIG_RAX: 00000000000001ad
RAX: ffffffffffffffda RBX: 00007f074a7b5fa0 RCX: 00007f074a58e969
RDX: ffffffffffffff9c RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f074a610ab1 R08: 0000000000000077 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f074a7b5fa0 R15: 00007ffe3e9c3508
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:is_anon_ns fs/mount.h:165 [inline]
RIP: 0010:do_move_mount+0x1fd/0x1930 fs/namespace.c:3648
Code: 03 80 3c 02 00 0f 85 65 13 00 00 49 8d 44 24 48 4d 8b 76 18 48 89 c2 48 89 44 24 40 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 78 13 00 00 49 8b 44 24 48 48 89 44 24 20 4d 39
RSP: 0018:ffffc90004447db8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888030063380 RCX: ffffc9000e9a9000
RDX: 0000000000000006 RSI: ffffffff823c0404 RDI: ffff888065c54c48
RBP: ffff888141ed83a0 R08: 0000000000000007 R09: fffffffffffff000
R10: ffff888030063380 R11: 0000000000000000 R12: ffffffffffffffea
R13: ffff88807c8f2600 R14: ffff88807c8f2600 R15: ffffc90004447e90
FS:  00007f074b4726c0(0000) GS:ffff8881249ea000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000299000 CR3: 00000000612ca000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	03 80 3c 02 00 0f    	add    0xf00023c(%rax),%eax
   6:	85 65 13             	test   %esp,0x13(%rbp)
   9:	00 00                	add    %al,(%rax)
   b:	49 8d 44 24 48       	lea    0x48(%r12),%rax
  10:	4d 8b 76 18          	mov    0x18(%r14),%r14
  14:	48 89 c2             	mov    %rax,%rdx
  17:	48 89 44 24 40       	mov    %rax,0x40(%rsp)
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 78 13 00 00    	jne    0x13ac
  34:	49 8b 44 24 48       	mov    0x48(%r12),%rax
  39:	48 89 44 24 20       	mov    %rax,0x20(%rsp)
  3e:	4d                   	rex.WRB
  3f:	39                   	.byte 0x39