=====================================================
BUG: KMSAN: uninit-value in __flush_smp_call_function_queue+0x343/0x1810 kernel/smp.c:549
 __flush_smp_call_function_queue+0x343/0x1810 kernel/smp.c:549
 generic_smp_call_function_single_interrupt+0x1c/0x30 kernel/smp.c:477
 __sysvec_call_function_single+0x48/0x350 arch/x86/kernel/smp.c:272
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:267 [inline]
 sysvec_call_function_single+0x7c/0x90 arch/x86/kernel/smp.c:267
 asm_sysvec_call_function_single+0x1f/0x30 arch/x86/include/asm/idtentry.h:704
 queue_work_on+0x1c4/0x2e0 kernel/workqueue.c:2449
 queue_work include/linux/workqueue.h:698 [inline]
 addr_event+0x419/0x630 drivers/infiniband/core/roce_gid_mgmt.c:873
 inet6addr_event+0x9f/0xe0 drivers/infiniband/core/roce_gid_mgmt.c:903
 notifier_call_chain kernel/notifier.c:85 [inline]
 atomic_notifier_call_chain+0xf0/0x460 kernel/notifier.c:223
 inet6addr_notifier_call_chain+0x3d/0x50 net/ipv6/addrconf_core.c:108
 addrconf_ifdown+0x1dd4/0x3240 net/ipv6/addrconf.c:3990
 addrconf_notify+0x184/0x1cf0 net/ipv6/addrconf.c:3788
 notifier_call_chain kernel/notifier.c:85 [inline]
 raw_notifier_call_chain+0xe6/0x450 kernel/notifier.c:453
 call_netdevice_notifiers_info net/core/dev.c:2249 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 netif_close_many+0x641/0xab0 net/core/dev.c:1805
 unregister_netdevice_many_notify+0x14e5/0x4a60 net/core/dev.c:12391
 unregister_netdevice_many net/core/dev.c:12484 [inline]
 default_device_exit_batch+0x1061/0x1120 net/core/dev.c:13076
 ops_exit_list net/core/net_namespace.c:205 [inline]
 ops_undo_list+0x7e0/0xb80 net/core/net_namespace.c:252
 cleanup_net+0xc24/0x1680 net/core/net_namespace.c:702
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xb65/0x1e40 kernel/workqueue.c:3397
 worker_thread+0xee4/0x1590 kernel/workqueue.c:3478
 kthread+0x53a/0x5f0 kernel/kthread.c:436
 ret_from_fork+0x20f/0x8d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Local variable iter created at:
 tdp_mmu_zap_leafs+0x52/0x6e0 arch/x86/kvm/mmu/tdp_mmu.c:983
 kvm_tdp_mmu_unmap_gfn_range+0x910/0xb50 arch/x86/kvm/mmu/tdp_mmu.c:1362

CPU: 1 UID: 0 PID: 146 Comm: kworker/u8:7 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: netns cleanup_net
=====================================================