From: Gary Lin Date: Thu, 9 Apr 2020 13:04:33 +0000 (+0200) Subject: efi/x86: Fix the deletion of variables in mixed mode X-Git-Tag: v5.10.7~2795^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a4b81ccfd4caba017d2b84720b6de4edd16911a0;p=platform%2Fkernel%2Flinux-rpi.git efi/x86: Fix the deletion of variables in mixed mode efi_thunk_set_variable() treated the NULL "data" pointer as an invalid parameter, and this broke the deletion of variables in mixed mode. This commit fixes the check of data so that the userspace program can delete a variable in mixed mode. Fixes: 8319e9d5ad98ffcc ("efi/x86: Handle by-ref arguments covering multiple pages in mixed mode") Signed-off-by: Gary Lin Signed-off-by: Ard Biesheuvel Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/r/20200408081606.1504-1-glin@suse.com Link: https://lore.kernel.org/r/20200409130434.6736-9-ardb@kernel.org --- diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c index 211bb93..e0e2e81 100644 --- a/arch/x86/platform/efi/efi_64.c +++ b/arch/x86/platform/efi/efi_64.c @@ -638,7 +638,7 @@ efi_thunk_set_variable(efi_char16_t *name, efi_guid_t *vendor, phys_vendor = virt_to_phys_or_null(vnd); phys_data = virt_to_phys_or_null_size(data, data_size); - if (!phys_name || !phys_data) + if (!phys_name || (data && !phys_data)) status = EFI_INVALID_PARAMETER; else status = efi_thunk(set_variable, phys_name, phys_vendor, @@ -669,7 +669,7 @@ efi_thunk_set_variable_nonblocking(efi_char16_t *name, efi_guid_t *vendor, phys_vendor = virt_to_phys_or_null(vnd); phys_data = virt_to_phys_or_null_size(data, data_size); - if (!phys_name || !phys_data) + if (!phys_name || (data && !phys_data)) status = EFI_INVALID_PARAMETER; else status = efi_thunk(set_variable, phys_name, phys_vendor,