=====================================================
BUG: KMSAN: uninit-value in __flush_smp_call_function_queue+0x343/0x1710 kernel/smp.c:535
 __flush_smp_call_function_queue+0x343/0x1710 kernel/smp.c:535
 generic_smp_call_function_single_interrupt+0x1c/0x30 kernel/smp.c:463
 __sysvec_call_function_single+0x45/0x310 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
 native_irq_enable arch/x86/include/asm/irqflags.h:42 [inline]
 arch_local_irq_enable arch/x86/include/asm/irqflags.h:119 [inline]
 raw_spin_rq_unlock_irq kernel/sched/sched.h:1630 [inline]
 finish_lock_switch kernel/sched/core.c:5027 [inline]
 finish_task_switch+0x11b/0x8b0 kernel/sched/core.c:5145
 context_switch kernel/sched/core.c:5293 [inline]
 __schedule+0x2739/0x84d0 kernel/sched/core.c:6902
 preempt_schedule_notrace+0x54/0xa0 kernel/sched/core.c:7179
 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13
 rcu_read_unlock_sched_notrace include/linux/rcupdate.h:984 [inline]
 find_stack lib/stackdepot.c:636 [inline]
 stack_depot_save_flags+0x2f7/0x790 lib/stackdepot.c:676
 stack_depot_save+0x12/0x20 lib/stackdepot.c:747
 __msan_poison_alloca+0x100/0x1a0 mm/kmsan/instrumentation.c:286
 pmdp_get include/linux/pgtable.h:347 [inline]
 pmdp_get_lockless include/linux/pgtable.h:635 [inline]
 __handle_mm_fault mm/memory.c:6383 [inline]
 handle_mm_fault+0x1c33/0x6e90 mm/memory.c:6583
 do_user_addr_fault+0x1760/0x2520 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x70/0xb0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:618

Local variable tmp created at:
 number+0x83/0x2190 lib/vsprintf.c:469
 vsnprintf+0xd0d/0x1b00 lib/vsprintf.c:2911

CPU: 0 UID: 0 PID: 6067 Comm: syz.2.37 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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