=====================================================
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
 zap_pmd_range mm/memory.c:2011 [inline]
 zap_pud_range mm/memory.c:2048 [inline]
 zap_p4d_range mm/memory.c:2069 [inline]
 __zap_vma_range+0x1234/0x9690 mm/memory.c:2109
 unmap_vmas+0x440/0x800 mm/memory.c:2178
 unmap_region+0x267/0x410 mm/vma.c:488
 vms_clear_ptes mm/vma.c:1303 [inline]
 vms_clean_up_area mm/vma.c:1315 [inline]
 __mmap_setup mm/vma.c:2476 [inline]
 __mmap_region mm/vma.c:2753 [inline]
 mmap_region+0x1aa3/0x5f20 mm/vma.c:2857
 do_mmap+0x17aa/0x1d70 mm/mmap.c:560
 vm_mmap_pgoff+0x40c/0x760 mm/util.c:581
 ksys_mmap_pgoff+0x51d/0x7e0 mm/mmap.c:606
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x19c/0x260 arch/x86/kernel/sys_x86_64.c:82
 x64_sys_call+0x18cd/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:10
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15d/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable rf created at:
 __schedule+0x3a/0x8750 kernel/sched/core.c:7028
 preempt_schedule_irq+0x50/0xa0 kernel/sched/core.c:7513

CPU: 0 UID: 0 PID: 11366 Comm: dhcpcd-run-hook Tainted: G             L      syzkaller #0 PREEMPT(lazy) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
=====================================================