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authorArd Biesheuvel <ardb@kernel.org>2020-02-16 21:46:25 +0300
committerArd Biesheuvel <ardb@kernel.org>2020-02-23 23:59:42 +0300
commit6b75d54d5258ccd655387a00bbe1b00f92f4d965 (patch)
tree2994a7d5e639d5d8a01b28ada0f89a787619f58e /security
parent9a440391b560347bf5ee7cb96b63e7e91cedf66a (diff)
downloadlinux-6b75d54d5258ccd655387a00bbe1b00f92f4d965.tar.xz
integrity: Check properly whether EFI GetVariable() is available
Testing the value of the efi.get_variable function pointer is not the right way to establish whether the platform supports EFI variables at runtime. Instead, use the newly added granular check that can test for the presence of each EFI runtime service individually. Acked-by: Serge Hallyn <serge@hallyn.com> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'security')
-rw-r--r--security/integrity/platform_certs/load_uefi.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/security/integrity/platform_certs/load_uefi.c b/security/integrity/platform_certs/load_uefi.c
index 111898aad56e..e2fe1bd3abb9 100644
--- a/security/integrity/platform_certs/load_uefi.c
+++ b/security/integrity/platform_certs/load_uefi.c
@@ -76,7 +76,7 @@ static int __init load_uefi_certs(void)
unsigned long dbsize = 0, dbxsize = 0, moksize = 0;
int rc = 0;
- if (!efi.get_variable)
+ if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
return false;
/* Get db, MokListRT, and dbx. They might not exist, so it isn't