------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:288 at nsproxy_ns_active_get+0x35b/0x3d0, CPU#0: syz-executor.2/45574
Modules linked in:
CPU: 0 UID: 0 PID: 45574 Comm: syz-executor.2 Not tainted 6.18.0-rc4-next-20251106 #1 PREEMPT(voluntary) 
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:nsproxy_ns_active_get+0x35b/0x3d0
Code: 0f 0b 90 e9 92 fd ff ff e8 c2 a2 ab ff 90 0f 0b 90 e9 e5 fd ff ff e8 b4 a2 ab ff 90 0f 0b 90 e9 38 fe ff ff e8 a6 a2 ab ff 90 <0f> 0b 90 e9 8b fe ff ff e8 98 a2 ab ff 90 0f 0b 90 e9 de fe ff ff
RSP: 0018:ffff88804ede7e20 EFLAGS: 00010212
RAX: 0000000000001cae RBX: ffff88805c0e19c0 RCX: ffffc90006c17000
RDX: 0000000000040000 RSI: ffffffff81c92b7a RDI: 0000000000000001
RBP: ffff8880094eec01 R08: 0000000000000001 R09: ffffed100129dd97
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888017ca6d00 R15: ffff88805c0e19c0
FS:  00007f37ca6b9700(0000) GS:ffff8880e539c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd22ff4e38 CR3: 0000000015ee6000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 switch_task_namespaces+0x3d/0x110
 ksys_unshare+0x520/0xa10
 __x64_sys_unshare+0x31/0x40
 do_syscall_64+0xbf/0x430
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f37cd143b19
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:00007f37ca6b9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f37cd256f60 RCX: 00007f37cd143b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000008000400
RBP: 00007f37cd19df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc411ae36f R14: 00007f37ca6b9300 R15: 0000000000022000
 </TASK>
irq event stamp: 1869
hardirqs last  enabled at (1877): [<ffffffff81548fa8>] __up_console_sem+0x78/0x80
hardirqs last disabled at (1886): [<ffffffff81548f8d>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (1826): [<ffffffff813bc48c>] handle_softirqs+0x50c/0x770
softirqs last disabled at (1817): [<ffffffff813bc824>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 45584 Comm: syz-executor.6 Tainted: G        W           6.18.0-rc4-next-20251106 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
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
 getname_flags.part.0+0x48/0x540
 getname_flags+0x95/0xe0
 path_listxattrat+0x302/0x360
 do_syscall_64+0xbf/0x430
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f36440fab19
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:00007f3641670188 EFLAGS: 00000246 ORIG_RAX: 00000000000000c2
RAX: ffffffffffffffda RBX: 00007f364420df60 RCX: 00007f36440fab19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f36416701d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd7ce7042f R14: 00007f3641670300 R15: 0000000000022000
 </TASK>
loop5: detected capacity change from 0 to 2