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| author | Jan Beulich <JBeulich@suse.com> | 2012-11-07 17:46:08 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-14 17:49:34 +0100 |
| commit | 5d6d578c170bb280db5d4779f666e456f4f82ec5 (patch) | |
| tree | 188f5a32ff431bbc72a3d3466fa82f562f6f110a /arch/x86 | |
| parent | efivarfs: Use query_variable_info() to limit kmalloc() (diff) | |
| download | linux-5d6d578c170bb280db5d4779f666e456f4f82ec5.tar.xz linux-5d6d578c170bb280db5d4779f666e456f4f82ec5.zip | |
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: Jan Beulich <jbeulich@suse.com>
Link: http://lkml.kernel.org/r/509A9E6002000078000A7079@nat28.tlf.novell.com
Acked-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/platform/efi/efi-bgrt.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/platform/efi/efi-bgrt.c b/arch/x86/platform/efi/efi-bgrt.c index f6a0c1b8e518..d9c1b95af17c 100644 --- a/arch/x86/platform/efi/efi-bgrt.c +++ b/arch/x86/platform/efi/efi-bgrt.c @@ -39,6 +39,8 @@ void efi_bgrt_init(void) if (ACPI_FAILURE(status)) return; + if (bgrt_tab->header.length < sizeof(*bgrt_tab)) + return; if (bgrt_tab->version != 1) return; if (bgrt_tab->image_type != 0 || !bgrt_tab->image_address) |