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x86/efi: efi_unmap_boot_services: fix calculation of ranges_to_free size

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ranges_to_free array should have enough room to store the entire EFI
memmap plus an extra element for NULL entry.
The calculation of this array size wrongly adds 1 to the overall size
instead of adding 1 to the number of elements.

Add parentheses to properly size the array.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Fixes: a4b0bf6a40 ("x86/efi: defer freeing of boot services memory")
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Mike Rapoport (Microsoft) 2026-03-20 15:59:48 +02:00 committed by Ard Biesheuvel
parent a4b0bf6a40
commit 217c0a5c17
1 changed files with 1 additions and 1 deletions
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2
arch/x86/platform/efi/quirks.c
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@ -424,7 +424,7 @@ void __init efi_unmap_boot_services(void)
if (efi_enabled(EFI_DBG))
return;
sz = sizeof(*ranges_to_free) * efi.memmap.nr_map + 1;
sz = sizeof(*ranges_to_free) * (efi.memmap.nr_map + 1);
ranges_to_free = kzalloc(sz, GFP_KERNEL);
if (!ranges_to_free) {
pr_err("Failed to allocate storage for freeable EFI regions\n");