------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:288 at nsproxy_ns_active_get+0x33f/0x3d0, CPU#0: syz-executor.5/11569
Modules linked in:
CPU: 0 UID: 0 PID: 11569 Comm: syz-executor.5 Not tainted 6.18.0-rc4-next-20251107 #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+0x33f/0x3d0
Code: ab ff 90 0f 0b 90 eb ee e8 3e 24 ab ff 90 0f 0b 90 e9 3f fd ff ff e8 30 24 ab ff 90 0f 0b 90 e9 92 fd ff ff e8 22 24 ab ff 90 <0f> 0b 90 e9 e5 fd ff ff e8 14 24 ab ff 90 0f 0b 90 e9 38 fe ff ff
RSP: 0018:ffff888017467e08 EFLAGS: 00010216
RAX: 00000000000016df RBX: ffff88804d667138 RCX: ffffc9000081d000
RDX: 0000000000040000 RSI: ffffffff81c9ab0e RDI: 0000000000000001
RBP: ffff888015dbe001 R08: 0000000000000001 R09: ffffed1002bb7d41
R10: 0000000000000001 R11: 0000000000000001 R12: ffff888009874700
R13: 0000000000000000 R14: ffff888053941bc0 R15: ffff888017467e98
FS:  00007f26ae1d3700(0000) GS:ffff8880e5398000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efdb9a0e344 CR3: 0000000051641000 CR4: 0000000000350ef0
DR0: ffdfffffffff7693 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 switch_task_namespaces+0x3d/0x110
 __do_sys_setns+0x6b0/0x19a0
 do_syscall_64+0xbf/0x430
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f26b0c5f107
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 34 01 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:00007f26ae1d3128 EFLAGS: 00000246 ORIG_RAX: 0000000000000134
RAX: ffffffffffffffda RBX: 00007f26b0d70f60 RCX: 00007f26b0c5f107
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ef
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffee2a8cadf R14: 00007f26ae1d3300 R15: 0000000000022000
 </TASK>
irq event stamp: 1661
hardirqs last  enabled at (1669): [<ffffffff81548fa8>] __up_console_sem+0x78/0x80
hardirqs last disabled at (1678): [<ffffffff81548f8d>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (1534): [<ffffffff813bc48c>] handle_softirqs+0x50c/0x770
softirqs last disabled at (1699): [<ffffffff813bc824>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:288 at nsproxy_ns_active_get+0x35b/0x3d0, CPU#0: syz-executor.5/11569
Modules linked in:
CPU: 0 UID: 0 PID: 11569 Comm: syz-executor.5 Tainted: G        W           6.18.0-rc4-next-20251107 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
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 22 24 ab ff 90 0f 0b 90 e9 e5 fd ff ff e8 14 24 ab ff 90 0f 0b 90 e9 38 fe ff ff e8 06 24 ab ff 90 <0f> 0b 90 e9 8b fe ff ff e8 f8 23 ab ff 90 0f 0b 90 e9 de fe ff ff
RSP: 0018:ffff888017467e08 EFLAGS: 00010212
RAX: 000000000001ec63 RBX: ffff88804d667138 RCX: ffffc9000081d000
RDX: 0000000000040000 RSI: ffffffff81c9ab2a RDI: 0000000000000001
RBP: ffff88800948b601 R08: 0000000000000001 R09: ffffed10012916d7
R10: 0000000000000001 R11: 0000000000000001 R12: ffff888009874700
R13: 0000000000000000 R14: ffff888053941bc0 R15: ffff888017467e98
FS:  00007f26ae1d3700(0000) GS:ffff8880e5398000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efdb9a0e344 CR3: 0000000051641000 CR4: 0000000000350ef0
DR0: ffdfffffffff7693 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 switch_task_namespaces+0x3d/0x110
 __do_sys_setns+0x6b0/0x19a0
 do_syscall_64+0xbf/0x430
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f26b0c5f107
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 34 01 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:00007f26ae1d3128 EFLAGS: 00000246 ORIG_RAX: 0000000000000134
RAX: ffffffffffffffda RBX: 00007f26b0d70f60 RCX: 00007f26b0c5f107
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ef
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffee2a8cadf R14: 00007f26ae1d3300 R15: 0000000000022000
 </TASK>
irq event stamp: 2191
hardirqs last  enabled at (2201): [<ffffffff81548fa8>] __up_console_sem+0x78/0x80
hardirqs last disabled at (2210): [<ffffffff81548f8d>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (2140): [<ffffffff813bc48c>] handle_softirqs+0x50c/0x770
softirqs last disabled at (2099): [<ffffffff813bc824>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
EXT4-fs (loop3): unable to read superblock