=====================================================
BUG: KMSAN: uninit-value in __flush_smp_call_function_queue+0x362/0x18e0 kernel/smp.c:535
 __flush_smp_call_function_queue+0x362/0x18e0 kernel/smp.c:535
 generic_smp_call_function_single_interrupt+0x1c/0x30 kernel/smp.c:463
 __sysvec_call_function_single+0x4b/0x3e0 arch/x86/kernel/smp.c:271
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
 sysvec_call_function_single+0x7c/0x90 arch/x86/kernel/smp.c:266
 asm_sysvec_call_function_single+0x1f/0x30 arch/x86/include/asm/idtentry.h:704
 strlen+0x3d/0x80 lib/string.c:420
 __fortify_strlen include/linux/fortify-string.h:266 [inline]
 kernfs_name_hash+0x6d/0x400 fs/kernfs/dir.c:333
 kernfs_find_ns+0x104/0x760 fs/kernfs/dir.c:890
 kernfs_remove_by_name_ns+0xd9/0x2e0 fs/kernfs/dir.c:1739
 kernfs_remove_by_name include/linux/kernfs.h:641 [inline]
 sysfs_unmerge_group+0x156/0x280 fs/sysfs/group.c:408
 dpm_sysfs_remove+0xbc/0xf0 drivers/base/power/sysfs.c:833
 device_del+0x254/0xd80 drivers/base/core.c:3854
 netdev_unregister_kobject+0x4e2/0x520 net/core/net-sysfs.c:2329
 unregister_netdevice_many_notify+0x3fde/0x4c00 net/core/dev.c:12466
 unregister_netdevice_many+0x22/0x30 net/core/dev.c:12494
 ops_exit_rtnl_list net/core/net_namespace.c:187 [inline]
 ops_undo_list+0x5d8/0xb80 net/core/net_namespace.c:248
 cleanup_net+0xc24/0x1460 net/core/net_namespace.c:702
 process_one_work kernel/workqueue.c:3276 [inline]
 process_scheduled_works+0xb82/0x1e80 kernel/workqueue.c:3359
 worker_thread+0xee4/0x1590 kernel/workqueue.c:3440
 kthread+0x53f/0x600 kernel/kthread.c:436
 ret_from_fork+0x20f/0x910 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: 13855 Comm: kworker/u8:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: netns cleanup_net
=====================================================