Commit 5d6d578c authored by Jan Beulich's avatar Jan Beulich Committed by H. Peter Anvin

x86, efi: Check table header length in efi_bgrt_init()

Header length should be validated for all ACPI tables before accessing
any non-header field.
Signed-off-by: default avatarJan Beulich <jbeulich@suse.com>
Link: http://lkml.kernel.org/r/509A9E6002000078000A7079@nat28.tlf.novell.comAcked-by: default avatarMatt Fleming <matt.fleming@intel.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent 89d16665
...@@ -39,6 +39,8 @@ void efi_bgrt_init(void) ...@@ -39,6 +39,8 @@ void efi_bgrt_init(void)
if (ACPI_FAILURE(status)) if (ACPI_FAILURE(status))
return; return;
if (bgrt_tab->header.length < sizeof(*bgrt_tab))
return;
if (bgrt_tab->version != 1) if (bgrt_tab->version != 1)
return; return;
if (bgrt_tab->image_type != 0 || !bgrt_tab->image_address) if (bgrt_tab->image_type != 0 || !bgrt_tab->image_address)
......
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