=====================================================
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
 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
 _raw_spin_unlock_irqrestore+0x33/0x60 kernel/locking/spinlock.c:194
 kthread_queue_work+0x9f/0x170 kernel/kthread.c:1210
 synchronize_rcu_expedited_queue_work kernel/rcu/tree_exp.h:498 [inline]
 synchronize_rcu_expedited+0xd6c/0x1200 kernel/rcu/tree_exp.h:971
 lru_cache_disable+0x2f/0x40 mm/swap.c:928
 do_mbind mm/mempolicy.c:1531 [inline]
 kernel_mbind mm/mempolicy.c:1757 [inline]
 __do_sys_mbind mm/mempolicy.c:1831 [inline]
 __se_sys_mbind+0xd9c/0x2150 mm/mempolicy.c:1827
 __ia32_sys_mbind+0x112/0x1a0 mm/mempolicy.c:1827
 ia32_sys_call+0x363f/0x4360 arch/x86/include/generated/asm/syscalls_32.h:275
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x17f/0x3f0 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/syscall_32.c:332
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:370
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Local variable rf created at:
 __schedule+0x3b/0x8640 kernel/sched/core.c:6775
 preempt_schedule_irq+0x50/0xa0 kernel/sched/core.c:7238

CPU: 0 UID: 0 PID: 6885 Comm: syz.7.166 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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