syzbot

RBP: 00007f260b011f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f260b1e6038 R14: 00007f260b1e5fa0 R15: 00007fffc853d778
 </TASK>
------------[ cut here ]------------
ida_free called for id=1003 which is not allocated.
WARNING: CPU: 0 PID: 16375 at lib/idr.c:592 ida_free+0x1f9/0x2e0 lib/idr.c:592
Modules linked in:
CPU: 0 UID: 0 PID: 16375 Comm: syz.5.2082 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:ida_free+0x1f9/0x2e0 lib/idr.c:592
Code: 7c f6 41 83 fe 3e 76 72 e8 d4 44 7c f6 48 8b 7c 24 28 4c 89 ee e8 77 01 0d 00 90 48 c7 c7 c0 73 cf 8c 89 ee e8 a8 1a 3b f6 90 <0f> 0b 90 90 e8 ae 44 7c f6 48 b8 00 00 00 00 00 fc ff df 48 01 c3
RSP: 0018:ffffc90003d97940 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 1ffff920007b2f29 RCX: ffffc9000bd71000
RDX: 0000000000080000 RSI: ffffffff81797cf5 RDI: 0000000000000001
RBP: 00000000000003eb R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: fffffffffffcacd8 R12: ffff88801e6c5000
R13: 0000000000000283 R14: 00000000000003eb R15: ffff88801e6c5078
FS:  00007f260bf006c0(0000) GS:ffff888124e8c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31defff8 CR3: 0000000077964000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 copy_mnt_ns+0x886/0xa90 fs/namespace.c:4168
 create_new_namespaces+0xd3/0xa90 kernel/nsproxy.c:78
 copy_namespaces+0x468/0x560 kernel/nsproxy.c:175
 copy_process+0x2828/0x76a0 kernel/fork.c:2184
 kernel_clone+0xfc/0x930 kernel/fork.c:2609
 __do_sys_clone+0xce/0x120 kernel/fork.c:2750
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f260af8eec9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f260befffe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f260b1e5fa0 RCX: 00007f260af8eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000002360411
RBP: 00007f260b011f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f260b1e6038 R14: 00007f260b1e5fa0 R15: 00007fffc853d778
 </TASK>