=====================================================
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
 smap_restore arch/x86/include/asm/smap.h:90 [inline]
 get_shadow_origin_ptr mm/kmsan/instrumentation.c:39 [inline]
 __msan_metadata_ptr_for_load_8+0x2c/0x40 mm/kmsan/instrumentation.c:94
 ma_dead_node lib/maple_tree.c:572 [inline]
 mas_rewalk_if_dead lib/maple_tree.c:4075 [inline]
 mas_prev_slot+0xa5d/0x10e0 lib/maple_tree.c:4226
 mas_prev+0xb7/0xf0 lib/maple_tree.c:5444
 vma_prev include/linux/mm.h:1335 [inline]
 __split_vma+0x1224/0x1330 mm/vma.c:573
 split_vma mm/vma.c:596 [inline]
 vma_modify+0x27ca/0x2d70 mm/vma.c:1680
 vma_modify_flags+0x2f8/0x5a0 mm/vma.c:1700
 mprotect_fixup+0x703/0x1050 mm/mprotect.c:756
 do_mprotect_pkey+0x11d8/0x1920 mm/mprotect.c:930
 __do_sys_mprotect mm/mprotect.c:951 [inline]
 __se_sys_mprotect mm/mprotect.c:948 [inline]
 __x64_sys_mprotect+0x9a/0x100 mm/mprotect.c:948
 x64_sys_call+0x2f14/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:11
 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: 1 UID: 0 PID: 7616 Comm: sed Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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