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efi/libstub: smbios: Use length member instead of record struct size

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[ Upstream commit 34343eb06a ]

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: 550b33cfd4 ("arm64: efi: Force the use of ...")
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ard Biesheuvel
2023-02-28 19:23:09 +01:00
committed by Greg Kroah-Hartman
parent e041bef1ad
commit 58c11bc7ad
1 changed files with 1 additions and 1 deletions
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drivers/firmware/efi/libstub/smbios.c
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@ -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);