=====================================================
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
 class_raw_spinlock_irqsave_destructor include/linux/spinlock.h:570 [inline]
 try_to_wake_up+0x1047/0x21e0 kernel/sched/core.c:4130
 wake_up_process kernel/sched/core.c:4374 [inline]
 wake_up_q+0xed/0x1e0 kernel/sched/core.c:1100
 futex_wake+0x862/0x920 kernel/futex/waitwake.c:198
 do_futex+0x419/0x480 kernel/futex/syscalls.c:135
 __do_sys_futex kernel/futex/syscalls.c:207 [inline]
 __se_sys_futex+0x5b8/0x740 kernel/futex/syscalls.c:188
 __x64_sys_futex+0x114/0x1a0 kernel/futex/syscalls.c:188
 x64_sys_call+0x2c48/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:203
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable tmp created at:
 number+0x83/0x2190 lib/vsprintf.c:470
 vsnprintf+0xd0d/0x1b00 lib/vsprintf.c:2912

CPU: 0 UID: 0 PID: 8584 Comm: syz.1.625 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
=====================================================