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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-19 19:11:10 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-19 19:11:10 -0800 |
| commit | 5abcd76f5d896de014bd8d1486107c483659d40d (patch) | |
| tree | 04d960c785e40300e800593826c9b1fa2137d2a5 /arch/x86/kernel | |
| parent | a57ed93600f2dab64e859d524c3320fe0922e99d (diff) | |
| parent | 5dcd14ecd41ea2b3ae3295a9b30d98769d52165f (diff) | |
Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 bootup changes from Ingo Molnar:
"Deal with bootloaders which fail to initialize unknown fields in
boot_params to zero, by sanitizing boot params passed in.
This unbreaks versions of kexec-utils. Other bootloaders do not
appear to show sensitivity to this change, but it's a possibility for
breakage nevertheless."
* 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, boot: Sanitize boot_params if not zeroed on creation
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/head32.c | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/head64.c | 2 |
2 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c index c18f59d10101..6773c918b8cc 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); + memblock_reserve(__pa_symbol(&_text), __pa_symbol(&__bss_stop) - __pa_symbol(&_text)); diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 037df57a99ac..849fc9e63c2f 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -25,6 +25,7 @@ #include <asm/kdebug.h> #include <asm/e820.h> #include <asm/bios_ebda.h> +#include <asm/bootparam_utils.h> static void __init zap_identity_mappings(void) { @@ -46,6 +47,7 @@ static void __init copy_bootdata(char *real_mode_data) char * command_line; memcpy(&boot_params, real_mode_data, sizeof boot_params); + sanitize_boot_params(&boot_params); if (boot_params.hdr.cmd_line_ptr) { command_line = __va(boot_params.hdr.cmd_line_ptr); memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); |