Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 2 UID: 0 PID: 6300 Comm: syz.3.75 Not tainted 6.15.0-rc6-syzkaller-00051-g405e6c37c89e #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
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:ffffc9000390fda8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88804f971b00 RCX: ffffc9000c402000
RDX: 0000000000000006 RSI: ffffffff823c0404 RDI: ffff888065d26288
RBP: ffff88801c37a720 R08: 0000000000000007 R09: fffffffffffff000
R10: ffff88804f971b00 R11: 0000000000000000 R12: ffffffffffffffea
R13: ffff888044ec3800 R14: ffff888044ec3800 R15: ffffc9000390fe80
FS:  0000000000000000(0000) GS:ffff8880979ea000(0063) knlGS:00000000f5066b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00007f58257d2e9c CR3: 000000004e4b8000 CR4: 0000000000352ef0
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_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f44579
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:00000000f506655c EFLAGS: 00000296 ORIG_RAX: 00000000000001ad
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000000
RDX: 00000000ffffff9c RSI: 0000000000000000 RDI: 0000000000000045
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </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:ffffc9000390fda8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88804f971b00 RCX: ffffc9000c402000
RDX: 0000000000000006 RSI: ffffffff823c0404 RDI: ffff888065d26288
RBP: ffff88801c37a720 R08: 0000000000000007 R09: fffffffffffff000
R10: ffff88804f971b00 R11: 0000000000000000 R12: ffffffffffffffea
R13: ffff888044ec3800 R14: ffff888044ec3800 R15: ffffc9000390fe80
FS:  0000000000000000(0000) GS:ffff8880979ea000(0063) knlGS:00000000f5066b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00007f58257d2e9c CR3: 000000004e4b8000 CR4: 0000000000352ef0
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