88 lines
3.3 KiB
Diff
88 lines
3.3 KiB
Diff
From c7ef01f56951b1c876069387c44e11575288f3d2 Mon Sep 17 00:00:00 2001
|
|
From: Vlastimil Babka <vbabka@suse.cz>
|
|
Date: Tue, 19 Dec 2017 22:33:46 +0100
|
|
Subject: [PATCH 213/231] x86/dumpstack: Indicate in Oops whether PTI is
|
|
configured and enabled
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
CVE-2017-5754
|
|
|
|
CONFIG_PAGE_TABLE_ISOLATION is relatively new and intrusive feature that may
|
|
still have some corner cases which could take some time to manifest and be
|
|
fixed. It would be useful to have Oops messages indicate whether it was
|
|
enabled for building the kernel, and whether it was disabled during boot.
|
|
|
|
Example of fully enabled:
|
|
|
|
Oops: 0001 [#1] SMP PTI
|
|
|
|
Example of enabled during build, but disabled during boot:
|
|
|
|
Oops: 0001 [#1] SMP NOPTI
|
|
|
|
We can decide to remove this after the feature has been tested in the field
|
|
long enough.
|
|
|
|
[ tglx: Made it use boot_cpu_has() as requested by Borislav ]
|
|
|
|
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
|
|
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
|
|
Reviewed-by: Eduardo Valentin <eduval@amazon.com>
|
|
Acked-by: Dave Hansen <dave.hansen@intel.com>
|
|
Cc: Andy Lutomirski <luto@kernel.org>
|
|
Cc: Andy Lutomirsky <luto@kernel.org>
|
|
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
|
|
Cc: Borislav Petkov <bp@alien8.de>
|
|
Cc: Brian Gerst <brgerst@gmail.com>
|
|
Cc: Dave Hansen <dave.hansen@linux.intel.com>
|
|
Cc: David Laight <David.Laight@aculab.com>
|
|
Cc: Denys Vlasenko <dvlasenk@redhat.com>
|
|
Cc: Greg KH <gregkh@linuxfoundation.org>
|
|
Cc: H. Peter Anvin <hpa@zytor.com>
|
|
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
|
|
Cc: Juergen Gross <jgross@suse.com>
|
|
Cc: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Cc: Peter Zijlstra <peterz@infradead.org>
|
|
Cc: Will Deacon <will.deacon@arm.com>
|
|
Cc: aliguori@amazon.com
|
|
Cc: bpetkov@suse.de
|
|
Cc: daniel.gruss@iaik.tugraz.at
|
|
Cc: hughd@google.com
|
|
Cc: jkosina@suse.cz
|
|
Cc: keescook@google.com
|
|
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
(cherry picked from commit 5f26d76c3fd67c48806415ef8b1116c97beff8ba)
|
|
Signed-off-by: Andy Whitcroft <apw@canonical.com>
|
|
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
|
|
(cherry picked from commit 7edb91fcc96589ad6b80446ec3835f83ffabb710)
|
|
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
|
|
---
|
|
arch/x86/kernel/dumpstack.c | 6 ++++--
|
|
1 file changed, 4 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
|
|
index 2bdeb983b9d8..19a936e9b259 100644
|
|
--- a/arch/x86/kernel/dumpstack.c
|
|
+++ b/arch/x86/kernel/dumpstack.c
|
|
@@ -298,11 +298,13 @@ int __die(const char *str, struct pt_regs *regs, long err)
|
|
unsigned long sp;
|
|
#endif
|
|
printk(KERN_DEFAULT
|
|
- "%s: %04lx [#%d]%s%s%s%s\n", str, err & 0xffff, ++die_counter,
|
|
+ "%s: %04lx [#%d]%s%s%s%s%s\n", str, err & 0xffff, ++die_counter,
|
|
IS_ENABLED(CONFIG_PREEMPT) ? " PREEMPT" : "",
|
|
IS_ENABLED(CONFIG_SMP) ? " SMP" : "",
|
|
debug_pagealloc_enabled() ? " DEBUG_PAGEALLOC" : "",
|
|
- IS_ENABLED(CONFIG_KASAN) ? " KASAN" : "");
|
|
+ IS_ENABLED(CONFIG_KASAN) ? " KASAN" : "",
|
|
+ IS_ENABLED(CONFIG_PAGE_TABLE_ISOLATION) ?
|
|
+ (boot_cpu_has(X86_FEATURE_PTI) ? " PTI" : " NOPTI") : "");
|
|
|
|
if (notify_die(DIE_OOPS, str, regs, err,
|
|
current->thread.trap_nr, SIGSEGV) == NOTIFY_STOP)
|
|
--
|
|
2.14.2
|
|
|