R13: 0000000000000004 R14: 0000000020000398 R15: 0000000000000001
 </TASK>
loop6: detected capacity change from 0 to 4
EXT4-fs (loop6): Couldn't mount because of unsupported optional features (21)
Oops: general protection fault, probably for non-canonical address 0xdffffc000000002e: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000170-0x0000000000000177]
CPU: 1 UID: 0 PID: 11153 Comm: syz-executor.5 Not tainted 6.18.0-rc5-next-20251114 #1 PREEMPT(voluntary) 
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:nsproxy_free+0x28a/0x5a0
Code: 02 00 00 4c 8b 65 28 4d 85 e4 74 43 e8 7f 56 30 00 49 8d bc 24 78 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f7 02 00 00 49 8b 9c 24 78 01 00 00 bf 08 00 00
RSP: 0018:ffff88800e0579f8 EFLAGS: 00010217
RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffc90000bf3000
RDX: 000000000000002e RSI: ffffffff8144dd61 RDI: 0000000000000174
RBP: ffff88801e1f77b8 R08: 0000000000000001 R09: ffffed1001f641c3
R10: 0000000000000003 R11: 0000000000000001 R12: fffffffffffffffc
R13: ffff88800fb20e1c R14: ffffffff85cfdf20 R15: ffff888017938878
FS:  00007f70d45b4700(0000) GS:ffff8880e548f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb03e8e5c20 CR3: 0000000016e47000 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: 0033:0x7f70d7080b19
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:00007f70d45b4188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f70d71940e0 RCX: 00007f70d7080b19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000300
RBP: 00007f70d70daf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe16d72c0f R14: 00007f70d45b4300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:nsproxy_free+0x28a/0x5a0
Code: 02 00 00 4c 8b 65 28 4d 85 e4 74 43 e8 7f 56 30 00 49 8d bc 24 78 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f7 02 00 00 49 8b 9c 24 78 01 00 00 bf 08 00 00
RSP: 0018:ffff88800e0579f8 EFLAGS: 00010217
RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffc90000bf3000
RDX: 000000000000002e RSI: ffffffff8144dd61 RDI: 0000000000000174
RBP: ffff88801e1f77b8 R08: 0000000000000001 R09: ffffed1001f641c3
R10: 0000000000000003 R11: 0000000000000001 R12: fffffffffffffffc
R13: ffff88800fb20e1c R14: ffffffff85cfdf20 R15: ffff888017938878
FS:  00007f70d45b4700(0000) GS:ffff8880e548f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb03e8e5c20 CR3: 0000000016e47000 CR4: 0000000000350ef0
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 11167 Comm: syz-executor.6 Tainted: G      D             6.18.0-rc5-next-20251114 #1 PREEMPT(voluntary) 
Tainted: [D]=DIE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xfa/0x120
 should_fail_ex+0x4d7/0x5e0
 should_failslab+0xc2/0x120
 kmem_cache_alloc_noprof+0x80/0x690
 __kernfs_new_node+0xd3/0x870
 kernfs_new_node+0x13c/0x1e0
 __kernfs_create_file+0x55/0x360
 sysfs_add_file_mode_ns+0x21c/0x440
 internal_create_group+0x571/0xeb0
 loop_configure+0xc46/0x15a0
 lo_ioctl+0x66d/0x1ca0
 blkdev_ioctl+0x365/0x6d0
 __x64_sys_ioctl+0x18f/0x210
 do_syscall_64+0xbf/0x430
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2455fc48d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 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:00007f2453539f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f245600e970 RCX: 00007f2455fc48d7
RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: ffffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000004 R14: 0000000020000398 R15: 0000000000000001
 </TASK>
loop6: detected capacity change from 0 to 4
EXT4-fs (loop6): Couldn't mount because of unsupported optional features (21)
loop6: detected capacity change from 0 to 4
EXT4-fs (loop6): Couldn't mount because of unsupported optional features (21)
----------------
Code disassembly (best guess):
   0:	02 00                	add    (%rax),%al
   2:	00 4c 8b 65          	add    %cl,0x65(%rbx,%rcx,4)
   6:	28 4d 85             	sub    %cl,-0x7b(%rbp)
   9:	e4 74                	in     $0x74,%al
   b:	43 e8 7f 56 30 00    	rex.XB callq 0x305690
  11:	49 8d bc 24 78 01 00 	lea    0x178(%r12),%rdi
  18:	00
  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 f7 02 00 00    	jne    0x32b
  34:	49 8b 9c 24 78 01 00 	mov    0x178(%r12),%rbx
  3b:	00
  3c:	bf                   	.byte 0xbf
  3d:	08 00                	or     %al,(%rax)