path: root/arch/x86/kernel/head32.c
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authorH. Peter Anvin <hpa@linux.intel.com>2013-01-29 09:05:24 (GMT)
committerH. Peter Anvin <hpa@linux.intel.com>2013-01-29 09:22:17 (GMT)
commit5dcd14ecd41ea2b3ae3295a9b30d98769d52165f (patch)
tree0bdf705c1fd6d6e5832f392e9b445a1aa5d265e3 /arch/x86/kernel/head32.c
parent09c205afde70c15f20ca76ba0a57409dad175fd0 (diff)
x86, boot: Sanitize boot_params if not zeroed on creation
Use the new sentinel field to detect bootloaders which fail to follow protocol and don't initialize fields in struct boot_params that they do not explicitly initialize to zero. Based on an original patch and research by Yinghai Lu. Changed by hpa to be invoked both in the decompression path and in the kernel proper; the latter for the case where a bootloader takes over decompression. Originally-by: Yinghai Lu <yinghai@kernel.org> Link: http://lkml.kernel.org/r/1359058816-7615-26-git-send-email-yinghai@kernel.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/head32.c')
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c
index c18f59d..6773c91 100644
--- a/arch/x86/kernel/head32.c
+++ b/arch/x86/kernel/head32.c
@@ -18,6 +18,7 @@
#include <asm/io_apic.h>
#include <asm/bios_ebda.h>
#include <asm/tlbflush.h>
+#include <asm/bootparam_utils.h>
static void __init i386_default_early_setup(void)
@@ -30,6 +31,8 @@ static void __init i386_default_early_setup(void)
void __init i386_start_kernel(void)
+ sanitize_boot_params(&boot_params);
__pa_symbol(&__bss_stop) - __pa_symbol(&_text));

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