------------[ cut here ]------------ WARNING: ./include/linux/ns_common.h:288 at __ns_ref_active_get include/linux/ns_common.h:288 [inline], CPU#0: syz.6.1768/13096 WARNING: ./include/linux/ns_common.h:288 at nsproxy_ns_active_get+0x8ab/0xcb0 fs/nsfs.c:690, CPU#0: syz.6.1768/13096 Modules linked in: CPU: 0 UID: 0 PID: 13096 Comm: syz.6.1768 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:__ns_ref_active_get include/linux/ns_common.h:288 [inline] RIP: 0010:nsproxy_ns_active_get+0x8ab/0xcb0 fs/nsfs.c:690 Code: 5f 5d e9 88 b2 1a 09 cc e8 72 41 77 ff 90 0f 0b 90 e9 ee f7 ff ff e8 64 41 77 ff 90 0f 0b 90 e9 12 f8 ff ff e8 56 41 77 ff 90 <0f> 0b 90 e9 dc f8 ff ff e8 48 41 77 ff 90 0f 0b 90 e9 03 f9 ff ff RSP: 0018:ffffc9000f89f9e0 EFLAGS: 00010287 RAX: ffffffff824a1bba RBX: ffff8880780d2a28 RCX: 0000000000080000 RDX: ffffc9001b0ed000 RSI: 0000000000041817 RDI: 0000000000041818 RBP: 00000000f0000301 R08: ffff88805cc16a23 R09: 1ffff1100b982d44 R10: dffffc0000000000 R11: ffffed100b982d45 R12: dffffc0000000000 R13: 1ffff1100656e803 R14: ffff88805cc16a20 R15: ffff88805cc167d0 FS: 00007fa6299bd6c0(0000) GS:ffff888125a83000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffff007ef40 CR3: 000000003a868000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000400 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: copy_namespaces+0x48c/0x4b0 kernel/nsproxy.c:183 copy_process+0x168f/0x3930 kernel/fork.c:2183 kernel_clone+0x21e/0x840 kernel/fork.c:2609 __do_sys_clone kernel/fork.c:2750 [inline] __se_sys_clone kernel/fork.c:2734 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2734 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa628b8f6c9 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:00007fa6299bcfe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fa628de5fa0 RCX: 00007fa628b8f6c9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020002000 RBP: 00007fa628c11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007fa628de6038 R14: 00007fa628de5fa0 R15: 00007ffff007f018