Oops: stack segment: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 10781 Comm: syz.2.2353 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:is_ns_init_id include/linux/ns_common.h:25 [inline] RIP: 0010:__ns_ref_put include/linux/ns_common.h:70 [inline] RIP: 0010:put_net include/net/net_namespace.h:292 [inline] RIP: 0010:nsproxy_free+0x40a/0x7c0 kernel/nsproxy.c:72 Code: 03 42 80 3c 28 00 74 08 4c 89 f7 e8 90 c2 99 00 4d 8b 36 4d 85 f6 0f 84 df 00 00 00 4d 8d be 78 01 00 00 4c 89 fd 48 c1 ed 03 <42> 80 7c 2d 00 00 74 08 4c 89 ff e8 66 c2 99 00 4d 8b 27 31 ff 4c RSP: 0018:ffffc9000f07f998 EFLAGS: 00010207 RAX: 1ffff11003a53b64 RBX: ffff88801d29daf8 RCX: 0000000000080000 RDX: ffffc9000c099000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: 000000000000002e R08: ffff888034e23a1f R09: 1ffff110069c4743 R10: dffffc0000000000 R11: ffffed10069c4744 R12: 0000000000000015 R13: dffffc0000000000 R14: fffffffffffffffc R15: 0000000000000174 FS: 00007fcb7f5f66c0(0000) GS:ffff888125b78000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b205e79e28 CR3: 000000003173e000 CR4: 00000000003526f0 Call Trace: __free_nsproxy_free kernel/nsproxy.c:76 [inline] create_new_namespaces+0x47a/0x540 kernel/nsproxy.c:132 copy_namespaces+0x438/0x4b0 kernel/nsproxy.c:166 copy_process+0x168f/0x3930 kernel/fork.c:2183 kernel_clone+0x21e/0x850 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: 0033:0x7fcb8138f6c9 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:00007fcb7f5f5fe8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fcb815e5fa0 RCX: 00007fcb8138f6c9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000004d800280 RBP: 00007fcb81411f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 00007fcb815e6038 R14: 00007fcb815e5fa0 R15: 00007ffedfc4c6a8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:is_ns_init_id include/linux/ns_common.h:25 [inline] RIP: 0010:__ns_ref_put include/linux/ns_common.h:70 [inline] RIP: 0010:put_net include/net/net_namespace.h:292 [inline] RIP: 0010:nsproxy_free+0x40a/0x7c0 kernel/nsproxy.c:72 Code: 03 42 80 3c 28 00 74 08 4c 89 f7 e8 90 c2 99 00 4d 8b 36 4d 85 f6 0f 84 df 00 00 00 4d 8d be 78 01 00 00 4c 89 fd 48 c1 ed 03 <42> 80 7c 2d 00 00 74 08 4c 89 ff e8 66 c2 99 00 4d 8b 27 31 ff 4c RSP: 0018:ffffc9000f07f998 EFLAGS: 00010207 RAX: 1ffff11003a53b64 RBX: ffff88801d29daf8 RCX: 0000000000080000 RDX: ffffc9000c099000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: 000000000000002e R08: ffff888034e23a1f R09: 1ffff110069c4743 R10: dffffc0000000000 R11: ffffed10069c4744 R12: 0000000000000015 R13: dffffc0000000000 R14: fffffffffffffffc R15: 0000000000000174 FS: 00007fcb7f5f66c0(0000) GS:ffff888125b78000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f94bb307440 CR3: 000000003173e000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 03 42 80 add -0x80(%rdx),%eax 3: 3c 28 cmp $0x28,%al 5: 00 74 08 4c add %dh,0x4c(%rax,%rcx,1) 9: 89 f7 mov %esi,%edi b: e8 90 c2 99 00 call 0x99c2a0 10: 4d 8b 36 mov (%r14),%r14 13: 4d 85 f6 test %r14,%r14 16: 0f 84 df 00 00 00 je 0xfb 1c: 4d 8d be 78 01 00 00 lea 0x178(%r14),%r15 23: 4c 89 fd mov %r15,%rbp 26: 48 c1 ed 03 shr $0x3,%rbp * 2a: 42 80 7c 2d 00 00 cmpb $0x0,0x0(%rbp,%r13,1) <-- trapping instruction 30: 74 08 je 0x3a 32: 4c 89 ff mov %r15,%rdi 35: e8 66 c2 99 00 call 0x99c2a0 3a: 4d 8b 27 mov (%r15),%r12 3d: 31 ff xor %edi,%edi 3f: 4c rex.WR