From 8079377656abe43b9802800de42419685f5ee61a Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Tue, 28 Feb 2023 19:23:09 +0100 Subject: [PATCH] efi/libstub: smbios: Use length member instead of record struct size [ Upstream commit 34343eb06afc04af9178a9883d9354dc12beede0 ] The type 1 SMBIOS record happens to always be the same size, but there are other record types which have been augmented over time, and so we should really use the length field in the header to decide where the string table starts. Fixes: 550b33cfd4452968 ("arm64: efi: Force the use of ...") Signed-off-by: Ard Biesheuvel Signed-off-by: Sasha Levin --- drivers/firmware/efi/libstub/smbios.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/efi/libstub/smbios.c b/drivers/firmware/efi/libstub/smbios.c index 460418b7f5f5..aadb422b9637 100644 --- a/drivers/firmware/efi/libstub/smbios.c +++ b/drivers/firmware/efi/libstub/smbios.c @@ -36,7 +36,7 @@ const u8 *__efi_get_smbios_string(u8 type, int offset, int recsize) if (status != EFI_SUCCESS) return NULL; - strtable = (u8 *)record + recsize; + strtable = (u8 *)record + record->length; for (int i = 1; i < ((u8 *)record)[offset]; i++) { int len = strlen(strtable);