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author | Kees Cook <keescook@chromium.org> | 2016-04-20 13:55:46 -0700 |
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committer | Ingo Molnar <mingo@kernel.org> | 2016-04-22 10:00:51 +0200 |
commit | 0f8ede1b8c4cb845c53072d7e49d71ca24a61ced (patch) | |
tree | 854a42e8b983b54abe174bc9ba91da4d89334c92 /arch/x86/boot/compressed/misc.c | |
parent | bf0118dbba9542ceb5d33d4a86830a6c88b0bbf6 (diff) | |
download | linux-stable-0f8ede1b8c4cb845c53072d7e49d71ca24a61ced.tar.gz linux-stable-0f8ede1b8c4cb845c53072d7e49d71ca24a61ced.tar.bz2 linux-stable-0f8ede1b8c4cb845c53072d7e49d71ca24a61ced.zip |
x86/KASLR: Warn when KASLR is disabled
If KASLR is built in but not available at run-time (either due to the
current conflict with hibernation, command-line request, or e820 parsing
failures), announce the state explicitly. To support this, a new "warn"
function is created, based on the existing "error" function.
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: H.J. Lu <hjl.tools@gmail.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1461185746-8017-6-git-send-email-keescook@chromium.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/boot/compressed/misc.c')
-rw-r--r-- | arch/x86/boot/compressed/misc.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c index eacc855ae08e..c57d785ff955 100644 --- a/arch/x86/boot/compressed/misc.c +++ b/arch/x86/boot/compressed/misc.c @@ -166,11 +166,17 @@ void __puthex(unsigned long value) } } -static void error(char *x) +void warn(char *m) { error_putstr("\n\n"); - error_putstr(x); - error_putstr("\n\n -- System halted"); + error_putstr(m); + error_putstr("\n\n"); +} + +static void error(char *m) +{ + warn(m); + error_putstr(" -- System halted"); while (1) asm("hlt"); |