diff options
| author | Kees Cook <keescook@chromium.org> | 2016-04-20 13:55:46 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-04-22 10:00:51 +0200 |
| commit | 0f8ede1b8c4cb845c53072d7e49d71ca24a61ced (patch) | |
| tree | 854a42e8b983b54abe174bc9ba91da4d89334c92 /arch/x86/boot/compressed/kaslr.c | |
| parent | bf0118dbba9542ceb5d33d4a86830a6c88b0bbf6 (diff) | |
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/kaslr.c')
| -rw-r--r-- | arch/x86/boot/compressed/kaslr.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c index 3ad71a0afa24..8741a6d83bfe 100644 --- a/arch/x86/boot/compressed/kaslr.c +++ b/arch/x86/boot/compressed/kaslr.c @@ -314,12 +314,12 @@ unsigned char *choose_random_location(unsigned char *input, #ifdef CONFIG_HIBERNATION if (!cmdline_find_option_bool("kaslr")) { - debug_putstr("KASLR disabled by default...\n"); + warn("KASLR disabled: 'kaslr' not on cmdline (hibernation selected)."); goto out; } #else if (cmdline_find_option_bool("nokaslr")) { - debug_putstr("KASLR disabled by cmdline...\n"); + warn("KASLR disabled: 'nokaslr' on cmdline."); goto out; } #endif @@ -333,7 +333,7 @@ unsigned char *choose_random_location(unsigned char *input, /* Walk e820 and find a random address. */ random_addr = find_random_addr(choice, output_size); if (!random_addr) { - debug_putstr("KASLR could not find suitable E820 region...\n"); + warn("KASLR disabled: could not find suitable E820 region!"); goto out; } |