9p: Bad value for 'rfdno'
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 4216 Comm: syz-executor.2 Not tainted 6.18.0-rc5-next-20251112 #1 PREEMPT(voluntary) 
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:nsproxy_free+0x13d/0x5a0
Code: 0f 85 40 04 00 00 4c 8b 65 30 4d 85 e4 74 41 e8 99 48 30 00 49 8d 7c 24 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 30 04 00 00 49 8b 5c 24 30 bf 08 00 00 00 48 89
RSP: 0018:ffff88801a4bf9f8 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0000000000000005 RCX: ffffc900035fc000
RDX: 0000000000000006 RSI: ffffffff81447a17 RDI: 0000000000000031
RBP: ffff88800ce129c0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8664ca57 R11: 0000000000000001 R12: 0000000000000001
R13: ffff88801a40cd14 R14: ffff88801ecd4c30 R15: ffff888015073ff8
FS:  00007fe172ee4700(0000) GS:ffff8880e5397000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f58b7964fd0 CR3: 0000000016dba000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 create_new_namespaces+0x585/0x750
 copy_namespaces+0x45c/0x580
 copy_process+0x26e4/0x72a0
 kernel_clone+0xea/0x7f0
 __do_sys_clone3+0x1f5/0x280
 do_syscall_64+0xbf/0x430
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe17598fb19
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe172ee4188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007fe175aa3020 RCX: 00007fe17598fb19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020005880
RBP: 00007fe1759e9f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffee9e4751f R14: 00007fe172ee4300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:nsproxy_free+0x13d/0x5a0
Code: 0f 85 40 04 00 00 4c 8b 65 30 4d 85 e4 74 41 e8 99 48 30 00 49 8d 7c 24 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 30 04 00 00 49 8b 5c 24 30 bf 08 00 00 00 48 89
RSP: 0018:ffff88801a4bf9f8 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0000000000000005 RCX: ffffc900035fc000
RDX: 0000000000000006 RSI: ffffffff81447a17 RDI: 0000000000000031
RBP: ffff88800ce129c0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8664ca57 R11: 0000000000000001 R12: 0000000000000001
R13: ffff88801a40cd14 R14: ffff88801ecd4c30 R15: ffff888015073ff8
FS:  00007fe172ee4700(0000) GS:ffff8880e5397000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f58b7964fd0 CR3: 0000000016dba000 CR4: 0000000000350ef0
FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
9p: Bad value for 'rfdno'
loop7: detected capacity change from 0 to 760
ISOFS: Unable to identify CD-ROM format.
----------------
Code disassembly (best guess):
   0:	0f 85 40 04 00 00    	jne    0x446
   6:	4c 8b 65 30          	mov    0x30(%rbp),%r12
   a:	4d 85 e4             	test   %r12,%r12
   d:	74 41                	je     0x50
   f:	e8 99 48 30 00       	callq  0x3048ad
  14:	49 8d 7c 24 30       	lea    0x30(%r12),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 30 04 00 00    	jne    0x464
  34:	49 8b 5c 24 30       	mov    0x30(%r12),%rbx
  39:	bf 08 00 00 00       	mov    $0x8,%edi
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89