=====================================================
BUG: KMSAN: uninit-value in ref_tracker_free+0x5ca/0xec0 lib/ref_tracker.c:228
 ref_tracker_free+0x5ca/0xec0 lib/ref_tracker.c:228
 netdev_tracker_free include/linux/netdevice.h:4295 [inline]
 netdev_put include/linux/netdevice.h:4312 [inline]
 neigh_parms_release+0x212/0x3d0 net/core/neighbour.c:1711
 inetdev_destroy net/ipv4/devinet.c:343 [inline]
 inetdev_event+0x1412/0x1e60 net/ipv4/devinet.c:1663
 notifier_call_chain kernel/notifier.c:85 [inline]
 raw_notifier_call_chain+0xe8/0x440 kernel/notifier.c:453
 call_netdevice_notifiers_info+0x1be/0x2b0 net/core/dev.c:2141
 call_netdevice_notifiers_extack net/core/dev.c:2179 [inline]
 call_netdevice_notifiers net/core/dev.c:2193 [inline]
 unregister_netdevice_many_notify+0x1fbf/0x3e30 net/core/dev.c:11809
 unregister_netdevice_many net/core/dev.c:11875 [inline]
 unregister_netdevice_queue+0x598/0x5f0 net/core/dev.c:11741
 unregister_netdevice include/linux/netdevice.h:3329 [inline]
 nsim_destroy+0x143/0x6f0 drivers/net/netdevsim/netdev.c:1021
 __nsim_dev_port_del+0x1e9/0x320 drivers/net/netdevsim/dev.c:1428
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1440 [inline]
 nsim_dev_reload_destroy+0x464/0x7b0 drivers/net/netdevsim/dev.c:1661
 nsim_dev_reload_down+0x114/0x150 drivers/net/netdevsim/dev.c:968
 devlink_reload+0xdc/0xa50 net/devlink/dev.c:461
 devlink_nl_reload_doit+0xf76/0x1930 net/devlink/dev.c:584
 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0x1214/0x12c0 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2543
 genl_rcv+0x40/0x60 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:713 [inline]
 __sock_sendmsg+0x30f/0x380 net/socket.c:728
 ____sys_sendmsg+0x877/0xb60 net/socket.c:2568
 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2622
 __sys_sendmsg net/socket.c:2654 [inline]
 __do_sys_sendmsg net/socket.c:2659 [inline]
 __se_sys_sendmsg net/socket.c:2657 [inline]
 __x64_sys_sendmsg+0x212/0x3c0 net/socket.c:2657
 x64_sys_call+0x2ed6/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 __alloc_frozen_pages_noprof+0x9a7/0xe00 mm/page_alloc.c:4762
 alloc_pages_mpol+0x4cd/0x890 mm/mempolicy.c:2270
 alloc_frozen_pages_noprof+0x1bf/0x1e0 mm/mempolicy.c:2341
 alloc_slab_page mm/slub.c:2423 [inline]
 allocate_slab+0x23a/0x1110 mm/slub.c:2587
 new_slab mm/slub.c:2640 [inline]
 ___slab_alloc+0x1287/0x3540 mm/slub.c:3826
 __slab_alloc mm/slub.c:3916 [inline]
 __slab_alloc_node mm/slub.c:3991 [inline]
 slab_alloc_node mm/slub.c:4152 [inline]
 __do_kmalloc_node mm/slub.c:4293 [inline]
 __kmalloc_noprof+0xa59/0x1230 mm/slub.c:4306
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 new_dir fs/proc/proc_sysctl.c:962 [inline]
 get_subdir fs/proc/proc_sysctl.c:1006 [inline]
 sysctl_mkdir_p fs/proc/proc_sysctl.c:1316 [inline]
 __register_sysctl_table+0x1bcb/0x2e30 fs/proc/proc_sysctl.c:1391
 register_net_sysctl_sz+0x3f5/0x410 net/sysctl_net.c:171
 ip_vs_control_net_init_sysctl net/netfilter/ipvs/ip_vs_ctl.c:4369 [inline]
 ip_vs_control_net_init+0x149e/0x1cf0 net/netfilter/ipvs/ip_vs_ctl.c:4461
 __ip_vs_init+0x20d/0x630 net/netfilter/ipvs/ip_vs_core.c:2308
 ops_init+0x462/0x7a0 net/core/net_namespace.c:138
 setup_net+0x305/0x12b0 net/core/net_namespace.c:362
 copy_net_ns+0x4d4/0xaa0 net/core/net_namespace.c:516
 create_new_namespaces+0x717/0xdb0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x17c/0x2b0 kernel/nsproxy.c:228
 ksys_unshare+0x939/0x1290 kernel/fork.c:3331
 __do_sys_unshare kernel/fork.c:3402 [inline]
 __se_sys_unshare kernel/fork.c:3400 [inline]
 __x64_sys_unshare+0x48/0x70 kernel/fork.c:3400
 x64_sys_call+0x1e4a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:273
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 16469 Comm: syz.7.3834 Not tainted 6.13.0-syzkaller-08997-gf34b580514c9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
=====================================================