From: Mike Rapoport (Microsoft) Date: Fri, 20 Mar 2026 13:59:48 +0000 (+0200) Subject: x86/efi: efi_unmap_boot_services: fix calculation of ranges_to_free size X-Git-Tag: v7.0-rc6~25^2 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=217c0a5c177a3d4f7c8497950cbf5c36756e8bbb;p=thirdparty%2Fkernel%2Flinux.git x86/efi: efi_unmap_boot_services: fix calculation of ranges_to_free size 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 Fixes: a4b0bf6a40f3 ("x86/efi: defer freeing of boot services memory") Signed-off-by: Mike Rapoport (Microsoft) Signed-off-by: Ard Biesheuvel --- diff --git a/arch/x86/platform/efi/quirks.c b/arch/x86/platform/efi/quirks.c index 35caa5746115..79f0818131e8 100644 --- a/arch/x86/platform/efi/quirks.c +++ b/arch/x86/platform/efi/quirks.c @@ -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");